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HJ 2039-2014

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Detail Information of HJ 2039-2014; HJ2039-2014
Description (Translated English): Environmental Protection
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: Z25
Classification of International Standard: 13.040.40
Word Count Estimation: 42,431
Date of Issue: 6/10/2014
Date of Implementation: 9/1/2014
Quoted Standard: GB 2893; GB 2894; GB 4053.1; GB 4053.2; GB 4053.3; GB 4208; GB 7251.1; GB 12348; GB 13223; GB 14048.1; GB 16297; GB 50007; GB 50009; GB 50010; GB 50011; GB 50014; GB 50015; GB 50016; GB 50017; GB 50018; GB 50019; GB 50029; GB 50033; GB 50040; GB 50052; GB
Drafting Organization: Beijing Academy of Environmental Sciences
Administrative Organization: ?Ministry of Environmental Protection Science, Technology
Regulation (derived from): Ministry of Environmental Protection Notice No. 42 of 2014
Issuing agency(ies): Ministry of Environmental Protection
Summary: This standard specifies thermal power plant smoke (powder) dust governance principles and practices, as well as dust engineering design, construction, inspection, operation and maintenance of technical requirements. This standard applies to coal and coal

HJ 2039-2014
Technical specifications for dedusting engineering of thermal power plants
People's Republic of China National Environmental Protection Standards
Technical Specifications for Thermal Power Plant Dust
(release
draft)
Issued on:2014-06-10
2014-09-01 implementation
Issued by the Ministry of Environmental Protection
Table of Contents
Preface ..I
1. Scope .1
2 Normative references .1
3 Terms and definitions 3
4 pollutants and pollution load 4
5 general requirements .5
6 .7 Process Design
The main process equipment 7 19
8 detection and process control ..20
9 Main aided engineering 22
10 labor safety, occupational health and fire .25
11 construction and acceptance ..26
Operation and maintenance of 12 ..27
Appendix A (informative) Technical parameters precipitator 31
Annex B (informative) ESP Selection step ..34
Annex C (informative) bag filter selection step .35
Annex D (informative) ESP high voltage power source and compare the characteristics of 36
Annex E (informative) electrostatic precipitator high voltage high frequency power supply 38 Technical Requirements
Annex F (informative) ESP boost record table .. 40
Annex G (informative) .41 ESP log table
Appendix H (informative) bag filter log table 42
Annex I (normative) Electrostatic Fabric Filter log table 43
Foreword
For the implementation of the "People's Republic of China Environmental Protection Law", "People's Republic of China Air Pollution Prevention Law," Regulation
Fan thermal power plant construction and operation management of dust, improve air quality, the development of this standard.
This standard specifies thermal power plant dedusting engineering design, construction, inspection, operation and maintenance of technical requirements.
This standard is the guiding document.
This standard is the first release.
This standard is developed by the Ministry of Environmental Protection Science, Technology organization.
Drafting of this standard: Beijing Academy of Environmental Sciences, State Power Environmental Protection Research Institute, Tsinghua University,
Zhejiang Feida Environmental Science and Technology Co., Ltd., Shandong Aobo Environmental Protection Technology Co., Ltd., Jiangsu environmental protection Shin Co.,
Fujian Longking Corp.
This standard MEP June 10, 2014 for approval.
This standard since September 1, 2014 implementation.
The standard explanation by the Ministry of Environmental Protection.
Technical Specifications for Thermal Power Plant Dust
1 Scope
This standard specifies thermal power plant smoke (powder) dust governance principles and practices, as well as dust engineering design, construction, inspection,
Operation and maintenance and other technical requirements.
This standard applies to coal and coal gangue power plant removal projects, including boiler flue gas dust removal engineering and unorganized row
Discharge process (coal transport, storage, crushing, preparation, ash removal and transport processes such as desulfurization agent) dust works. can
As an environmental impact assessment, engineering design and construction, and acceptance of completed construction projects after the completion of operation and management skills
Surgery basis. HFO, smoke (powder) dust control and dust removal project of biomass power plants can be implemented by reference.
2 Normative references
The standard content of the following documents cited in the articles. For undated references, the effective version applies to this
standard.
GB 2158 workplace occupational hazard warning labels
GB 2893 Safety colors
GB 2894 Safety Signs and use guidelines
GB 4053.1 fixed ladders and platforms - Safety requirements - Part 1: Steel ladders
GB 4053.2 fixed ladders and platforms - Safety requirements - Part 2: Steel LADDER
GB 4053.3 fixed ladders and platforms - Safety requirements - Part 3: Industrial guardrails and steel platform
GB 4208 housing protection (IP Code)
GB 7251 Low-voltage switchgear and control equipment
GB 12348 boundary of industrial enterprises noise emission standards
GB 13223 Thermal Power Plant Air Pollutant Emission Standards
GB 16297 Air Pollutant Emission Standards
GB 50007 Code for design of building foundation
GB 50009 building structural load specifications
GB 50010 Design of Concrete Structures
GB 50011 Seismic Design of Buildings
GB 50014 outdoor drainage design specifications
GB 50015 Water and Drainage Design Specification
GB 50016 architectural design code for fire protection
Design of steel structures GB 50017
GB 50018 cold-formed steel specifications
GB 50019 Heating, ventilation and air conditioning design
GB 50029 air station design specifications
GB 50040 dynamic machine foundation design specification
GB 50052 power supply and distribution system design specifications
GB 50054 low voltage power distribution design specifications
GB 50057 Lightning in design
GB 50140 Building fire extinguishers configuration design specifications
GB 50187 for General graphic design specification
GB 50217 electrical engineering design of cables
GB 50229 fire protection design of power plants and substations
GB 50251 gas pipeline project design specifications
GB 50660 and medium-sized power plant design specifications
GB/T 3797 Electric Control Equipment
GB/T 3859.1 Semiconductor convertors - General requirements and line commutated converters - Part 1-1: Specification of basic requirements
GB/T 3859.2 Semiconductor convertors - General requirements and line-commutated converters Part 1-2: Application guide
GB/T 5117 non-alloy and fine grain steel electrode
GB/T 5118 heat-resistant steel welding rod
GB/T 6719 baghouse technology requirements
Transformer oil quality GB/T 7595 running
GB/T 11352 Carbon steel castings for general engineering purposes
GB/T 14048 Low-voltage switchgear and control equipment
GB/T 16845 precipitators
GB/T 50033 architectural lighting design standards
GB J 87 Industrial Enterprise Noise Control Design Specification
GB Z 1 Design of Industrial Enterprises hygiene standards
GB Z 2.1 Workplace Hazardous Occupational Exposure Limits - Part 1: Chemical hazardous agents
GB Z 2.2 Workplace Hazardous Occupational Exposure Limits - Part 2: physical factors
DL/T 387 power plant flue gas baghouse Selection Guide
DL/T 461 coal-fired power plant operation and maintenance of ESP Guide
DL/T 514 ESP
Overvoltage protection and insulation coordination DL/T 620 AC electrical installations
DL/T 1121 coal-fired power plant boiler flue gas dust bag engineering and technical specifications
DL/T 5035 power plant heating, ventilation and air conditioning design technical regulations
DL/T 5044 Electric Power Design Engineering Technical specification DC system
DL/T 5072 thermal power plant paint design Regulations
DL/T 5121 power plant coal smoke wind pipeline design Technical specification
DL/T 5137 Technical code for designing electrical measuring devices and energy metering
HJ/T 284 for environmental protection product requirements baghouse with electromagnetic pulse valve
HJ/T 320 environmental protection product ESP high voltage rectifier power supply
HJ/T 321 environmental protection product ESP low voltage control supply
HJ/T 324 for environmental protection product requirements baghouse with filter
HJ/T 326 for environmental protection product requirements baghouse with a membrane filter media
HJ/T 327 for environmental protection product requirements baghouse filter bag
HJ/T 328 environmental protection product pulse jet bag filter class
HJ/T 329 environmental protection product rotary cleaning bag filter
HJ/T 330 environmental protection product sub-room cleaning bag filter class
HJ/T 397 stationary source emission monitoring and technical specifications
JB 10191 safety requirements for pulse jet bag filter baghouse class with manifold box
JB/T 5845 Standard Test Method for High Voltage Electrostatic Precipitator rectifier equipment
JB/T 5906 ESP anode plate
JB/T 5911 ESP weldment technical requirements
JB/T 5913 ESP cathode lines
JB/T 5916 baghouse with electromagnetic pulse valve
JB/T 5917 Technical condition for baghouse filter bag framework
JB/T 6407 ESP design, commissioning, operation, maintenance and safety specifications
JB/T 7671 ESP simulation test methods for air distribution
JB/T 8471 baghouse technical requirements for installation and acceptance
JB/T 8532 pulse jet bag filter class
JB/T 8536 ESP technology mechanical installation conditions
JB/T within 9535, preservative outdoor electrical products Environmental technical requirements
JB/T 9688 ESP with thyristor controlled high voltage power supply
JB/T 10341 cartridge filter
JB/T 11267 top electromagnetic hammer rapping ESP
JB/ZQ 3687 manual arc welding specifications
SDZ 019 welding General technical requirements
"Acceptance of completed construction projects management approach" (SEPA Order No. 13)
3 Terms and Definitions
Terminology and definitions The following terms and definitions GB/T 16845 apply to this defined standard.
3.1 Dust dust removal engineering works
Governance smoke (powder) dust pollution works by the flue dust collector, fan and system auxiliary device components.
3.2 unloading, conveying system ash discharging and transportation system
The precipitator dust collected complete sets of equipment delivered to the designated location.
3.3 standard state standard condition
Flue gas at a temperature of 273K, pressure of 101.325 kPa when the state, referred to as "standard state." As specified in this standard
Concentration of air pollutants refer to dry flue gas values of the standard state.
3.4 Low low low low temperature ESP ESP
Low temperature economizer or MGGH ESP inlet flue gas temperature is reduced to below the dew point of acid, the minimum temperature should meet
Wet desulphurization system for process temperatures required ESP.
3.5 wet electrostatic precipitator wet ESP
Collecting use liquid cleaning electrostatic precipitator.
3.6 Electrostatic Fabric Filter electrostatic-fabric integrated precipitator
Electrostatic dust and dust filtration mechanism combined with a composite filter.
3.7 Boiler Maximum Continuous conditions boiler maximum continuous rating
Condition boiler maximum continuous evaporation under short BMCR conditions.
3.8 Boilers operating conditions boiler economic continuous rating
Economic conditions evaporation under the boiler, steam turbine plant heat rate corresponding to the guarantee conditions, referred BECR conditions.
4 pollutants and pollution load
4.1 Pollutants
4.1.1 Thermal Power Plant smoke (powder) dust, soot and dust including fugitive emissions of boiler combustion process.
4.1.2 The main components of thermal power plant boiler flue gas include: SO2, SO3, NOX, O2, CO2, CO, N2, H2O and tobacco
Dust and the like.
4.1.3 The main chemical components of thermal power plant boiler soot include: Na2O, Fe2O3, K2O, SO3, Al2O3, SiO2, CaO,
MgO, P2O5, Li2O, TiO2 and the like.
4.1.4 fugitive dust emissions from thermal power plants including coal transport, storage, crushing, preparation and desulfurization agent to ash
In addition to the dust produced during transport and the like.
4.2 pollution load
4.2.1 According to the project design needs to be collected dust and gas fired power plant and other physical and chemical properties of raw materials, including:
Flue gas volume a) of the boiler (the normal amount, the maximum amount);
b) and flue gas temperature variation range (the maximum temperature, normal temperature, dew point temperature);
c) dust concentration (concentration of the actual working conditions, standard state, O2 content of 6% of the dry flue gas concentration);
d) flue gas components (SO2, SO3, NOX, O2, CO2, CO, H2O, etc.) and concentration;
e) the moisture content of the flue gas, the relative humidity;
f) the chemical composition of dust (Na2O, Fe2O3, K2O, SO3, Al2O3, SiO2, CaO, MgO, P2O5, Li2O,
TiO2, etc.);
g) a specific resistance of dust (including laboratory and conditions), particle size, true density, bulk density, adhesion and the like.
4.2.2 has been built boiler installation or retrofit dust removal system design conditions and working conditions should be checked according to the actual entrance of the dust removal system
Flue gas measurement parameters and includes the changing trend of fuel.
4.2.3 fugitive emissions of dust load should be based on actual need to set the amount of dust exhaust required.
4.3 dust effects
4.3.1 The concentration of dust emissions shall comply with the provisions of GB 13223.
Dust concentration 4.3.2 fugitive emissions shall comply with the provisions of GB 16297.
5 general requirements
5.1 General provisions
5.1.1 flue gas dust removal project
5.1.1.1 Thermal Power Plant should be strengthened and the ratio of fuel management, as far as possible to ensure operation at design conditions to ensure that subsequent precipitator
The operating results meet the discharge standards requirements.
5.1.1.2 After the dust removal project should be based on technical and economic comparison of emissions requirements, boilers burning coal and soot characteristics determined
Filter type.
5.1.1.3 Dust project should be reasonably configured according to the power production process should not be bypassed.
5.1.1.4 Dust engineering design pressure rating, seismic design should meet national and industry specifications.
5.1.1.5 construction dust, waste water generated during the operation, and prevention of waste and emissions of other pollutants, should implement
Implementation of the relevant provisions of existing national environmental regulations, etc., may not produce secondary pollution.
5.1.1.6 Dust engineering design, construction should take measures to reduce noise and effective sound insulation, noise reduction, greening, and noise
Vibration should be consistent with GB 50040 GB J 87 and the provisions of the plant boundary noise shall comply with the provisions of GB 12348.
5.1.1.7 thermal power plant flue gas emissions continuous monitoring system should be set up to monitor, and networking with the local environmental protection department. Flue Gas Cleaning
Inlet and outlet should be set to manual sampling smoke hole and operating platforms.
5.1.2 fugitive emissions of dust removal project
5.1.2.1 fugitive dust control emissions include dust, fully enclosed, semi-enclosed, enclosure, water spray dust suppression, curing,
We should strengthen the daily operation and management.
5.1.2.2 fugitive dust emissions shall comply with the provisions of GB 16297, and should be combined with the requirements of the surrounding landscape, if necessary, to dust
Landscaping works.
5.2 flue gas dust removal project general layout
5.2.1 Flue Gas Cleaning Works by flue dust, ash unloaded means fan, flue gas monitoring system, temperature and pressure
Detection devices, electrical and control systems and other auxiliary compressed air supply system.
5.2.2 The general layout principles to be followed include: equipment operation and stability, easy management and maintenance, economical, safety and health
Wait. The layout should be consistent with the overall dust GB 50660 and GB Z provisions 1, and meet the following requirements:
a) the process is reasonable, dust and other main equipment should be arranged as close to the source of pollution; arrangement of the facilities should be smooth,
Compact and beautiful;
b) the reasonable use of the terrain and geological conditions, and considering the prevailing wind and other atmospheric conditions;
c) make full use of the existing plant area utilities and power supply and distribution systems, taking into account the possible need for development;
d) transport facilitation, transport flow, to facilitate the construction, operation and maintenance and to consider the impact on the surrounding incidents may cause.
5.2.3 dust elevation site works, drainage and flood control ﹑ shall comply with the provisions of GB 50187.
5.2.4 Equipment should be left between the main dust project sufficient space for installation, maintenance space; convenient transportation. Body set up
Peripheral equipment shall be provided with transport routes and fire exits, the fire should be designed to comply with the provisions of GB 50016. Also surrounding the main device
It should have a crane or mobile crane working conditions.
5.2.5 General layout should prevent harmful gases, smoke (powder) dust, strong vibrations and high noise surrounding the environment.
5.2.6 New projects should set aside a modest space, to accommodate the need for tighter emission standards.
5.2.7 Project flue dust across the road, when the high-altitude railway laying, the flue should be designed to comply with the provisions of GB 50251, and left
Certain surplus height.
5.2.8 Dust project includes rack out of the flue gas, ash pipe, cable bridge and the bracket. Rack arrangement should be consistent
The following requirements:
a) the basis and the headroom shall not affect the position of transportation, fire protection and maintenance;
b) shall not preclude the building natural light and ventilation.
5.2.9 pipe frame and buildings, the minimum horizontal distance between structures should meet the requirements of Table 1.
Table minimum horizontal spacing unit and a frame buildings, structures between: m
Buildings and structures Name Minimum horizontal pitch
Building doors and windows of the outer edge of the wall or the outer edge of the protruding portion 3.0
Building without doors or walls of the outer edge of the outer edge of the protruding portion 1.5
Road 1.0
The outer edge of the sidewalk 0.5
Factory wall (centerline) 1.0
Lighting and communication post (center) 1.0
Note 1: Unless otherwise indicated by the table spacing, the tube rack from the outermost line counting; when urban road type, counting from the edge of the road, for road type,
Counting from the edge of the shoulder.
Note 2: This table does not apply to low-frame, ground-mounted and building support formula.
5.2.10 pipe rack over railways, roads minimum vertical spacing should be in accordance with Table 2.
Table 2 racks across railways, roads minimum vertical spacing unit: m
Name the minimum vertical spacing
Railway (counting from the top rail, general line) 5.5a
Road (counting from the Crown) 5.0b
Sidewalk (pavement from counting) 2.2/2.5c
Note 1: Unless otherwise indicated by the table spacing, the line from the outer edge of the protective equipment, counting from the date of the lowest part of the rack.
Note 2: a line overhead, the minimum vertical pipe rack over electrified railway spacing should comply with the relevant specification.
b have large transport requirements or during road maintenance has a large lifting devices should be determined according to need. When difficulties in ensuring security
Under the premise can be reduced to 4.5 m.
c Street area sidewalk is 2.2 m, blocks away from the sidewalk is 2.5 m.
5.2.11 control room and other interior building floor elevation, top elevation equipment base should be higher than 0.15 m above the ground outside.
A vehicle out of the building interior, foreign floor height is generally 0.15 m ~ 0.30 m; no vehicle access to the indoor and outdoor height difference
It may be greater than 0.30 m.
5.2.12 hydrant should be close to the road, and its distribution should meet firefighting radius requirements. Outdoor fire hydrant spacing should not exceed
120 m. Hydrant from the street should not be greater than 2 m, from the housing wall should not be less than 5 m.
5.2.13 Construction (structures) Fire spacing should comply with the provisions of GB 50016.
5.2.14 general layout scheme comparison should be proposed recommendation program, and draw the overall plan.
6 Process Design
6.1 General provisions
6.1.1 Thermal Power Plant Dust project should be reasonably configured according to the production process and emissions requirements. Engineering Export dust emissions to the environment should be
In line with national and local emission standards of air pollutants, the construction project environmental impact assessment documents and total control regulations; work
Workplace dust Occupational exposure limits shall comply with the limits and requirements of GB Z 1 GB Z 2.1, GB Z 2.2 requirements.
6.1.2 Dust project should adapt to changes in sources of gas, and when the characteristics of aerosol concentration should be varied within a certain range of normal
run. Dust project should be synchronized with the operation of the production process equipment, availability should be 100%.
6.1.3 precipitator design life and ancillary units should match the design life of 30 years shall design, overall design should be consistent with GB
50660 of provisions.
6.1.4 dust removal system is arranged and taken antifreeze, insulation and other measures should comply with the provisions of GB 50019. Hopper should be set
Insulation and heating systems.
6.1.5 dust unloading, Ash approach should meet the requirements of comprehensive utilization, storage and transportation of dust should prevent secondary pollution.
6.1.6 secondary dust pollution generated in the process should take appropriate control measures.
6.2 Process
6.2.1 Thermal Power Plant common flue gas dust removal process shown in Figure 1.
1 thermal power plant flue gas dust removal process
6.2.2 Thermal Power Plant and the main point of the fugitive emission control measures are shown in Table 3.
Table 3 Thermal Power Plant fugitive emission point and the control measures
Particulate matter emission control measures for point
Raw field/coal yard enclosed circular (or bar) coal fields, silos, Wind Dust Network
Coal trestle/water corridor, closed
Transshipment point baghouse dust mask or wet scrubber
Coal crushing baghouse dust cover +
Between unloading baghouse
Dry ash baghouse
Sorbent preparation system closed measures baghouse
Ash field spraying, rolling, curing
6.3 fugitive emissions dust shroud design requirements
6.3.1 to set dust cover fugitive emission sources should be a priority to set the dust cover, and meet production and maintenance operations to be
begging.
6.3.2 dust cover air vents should not close the open holes (such as operating hole observation hole, spout, etc.), so as not to inhale large
The amount of air or material. Dust cover design should take full account of air distribution, to avoid the dust stream through human breathing zone.
6.3.3 dust hood exhaust volume shall prevent dust spread to the principles of environmental space OK.
6.3.4 In the dust cover debris may enter the case, it should be set to cover the mouth grille.
Select 6.4 Remove Dust
6.4.1 Dust should choose the way of local conditions, the coal should be, because the furnace system should, through technical and economic comparison, can follow through
Ji effectively implement the principle of a stable discharge standards.
6.4.2 to meet the thermal power plant precipitator dust emission requirements of the standard include ESP, bag filter bags and electrical complex
Together dust. Encourage the use of a variety of proven more effective dust removal technology portfolio.
6.5 ESP Design
6.5.1 General provisions
6.5.1.1 ESP design should consider the following conditions:
a) system overview, technical parameters including boilers, desulfurization way, way denitration, Fan, boiler dust manner, pot
Furnace slag methods;
b) physical and chemical properties of the dust, including the chemical composition (including Na2O, Fe2O3, K2O, SO3, Al2O3, SiO2, CaO,
MgO, P2O5, Li2O, TiO2, etc.), particle size, specific resistance (specific resistance and smoke including laboratory conditions specific resistance), density
(Including bulk density and true density) and angle of repose, etc;
c) flue gas composition, including SO2, SO3, NOX, O2, CO2, CO, H2O and the like;
d) flue gas parameters, including the ESP inlet flue gas volume, ESP inlet flue gas temperature, flue gas dew point temperature, electrical
Flue dust entrance maximum dust concentration;
e) site meteorological and geographical conditions;
f) covering ESP, ash mode;
g) ESP-time investment costs, operating costs (water, electricity, spare parts, etc.);
h) ESP operation, maintenance and management of user requirements;
i) dust recycling value and use of the form;
j) design and verification coal coal coal quality data;
k) precipitator outlet emission limits and collection efficiency.
6.5.1.2 Selection of electric precipitator overall performance requirements include electrostatic precipitator outlet dust emission concentration, pressure drop body, the body
Leakage rate and annual operating hours. Wherein the outlet concentration of dust emissions and annual operating hours shall be determined in accordance with design requirements.
6.5.1.3 electric precipitator configuration and structure should be based on the amount of flue gas is determined, taking into account the nature of the flue gas, dust removal efficiency requirements,
Working conditions and other factors, in general, refer to the following configuration requirements:
a) ESP units: 1 to 4;
b) Number of farms: Usually less than 4, when the ESP outlet dust concentration limit of 20 mg/time of not less than 5 m3;
c) ratio of the dust collection area (SCA): When the ESP outlet dust concentration limit of 30 mg/m3 is not less than 110
m2/(m3/s); when the ESP outlet dust concentration limit of 20 mg/m3 is not less than 130 m2/(m3/s).
6.5.1.4 ESP power supply should adopt energy-efficient power technology.
6.5.1.5 ESP technical parameters refer to Appendix A in Table A.1.
6.5.2 Performance requirements
6.5.2.1 ESP should ensure efficiency reached under the following conditions:
a) demand-side design conditions provided;
b) a power supply partition does not work. When a furnace with a single room when electrostatic precipitator, will not be considered; a double room more
Taipower dust, stopped by a partition powered consideration; small partition powered by two power supply stop partitions consideration;
c) flue gas temperature for the design temperature plus 10 ℃ ~ 15 ℃;
d) flue gas volume for the design of flue gas volume plus 10% margin;
e) ESP burning design coal or coal should be checked to ensure that achieve efficiency; if necessary also in accordance with the worst coal test
Consider, but should be described.
6.5.2.2 ESP bulk leakage rate and pressure drop body shall comply with DL/T 514's.
6.5.2.3 The maximum noise level from the electrostatic precipitator housing 1.5 m does not exceed 85 dB (A).
6.5.3 body design requirements
6.5.3.1 The housing must meet the following requirements:
a) housing should be sealed, heat, rain, top water, housing body should avoid dead ends or dust accumulation;
b) carrying member of ESP should have sufficient rigidity and strength in order to ensure safe operation, bearing member should be consistent with JB/T
5911, DL/T 514 and the provisions of GB 50017;
c) using the induced draft fan and booster fan merge, filter housing and related response flue stiffness, strength calculation;
Materials d) the nature of the case to be treated flue gas is determined, the thickness of not less than 4 mm;
e) housing should be provided access doors, escalators, platforms, railings, retaining along, Manhole, channel, etc; each ESP
Before and after the electric field should be set and channel Manhole, electric top ESP shall be provided with access doors, circular diameter of at least Manhole
600mm, rectangular Manhole size should be at least 450 mm × 600 mm; platform load should be at least 4 kN/m2, load escalator
It should be at least 2 kN/m2, stairs, guard rails, platform security and technical conditions should be consistent with the GB 4053.1 ~ GB 4053.3
Regulations;
The access door f) access to every part of the body should be set up high-voltage high-voltage isolation switch cabinet (box), and the high-pressure part
Power rectifier transformer interlock;
g) shall be provided with heating means insulator;
h) should take full account of thermal expansion of the housing.
6.5.3.2 anode plate and cathode line shall meet the following requirements:
a) anode plate (collecting plates) shall comply with the provisions of JB/T 5906 or JB/T 11267, the thickness of not less than 1.2 mm,
Materials commonly used SPCC;
b) a cathode line (discharge electrode) should be solid and reliable, and has good electrical properties and rapping cleaning performance;
c) cathode line shall comply with JB/T 5913 or JB/T 11267; and
d) an anode plate and the cathode wire frame should be measures to prevent swinging.
6.5.3.3 rapping system should be able to meet the cleaning requirements, rapping acceleration comply with DL/T 461, the rapping procedure adjustable. Vibration
Playing device materials and forms shall be determined in accordance with soot adhesive properties. Top electromagnetic hammer rapping ESP should be consistent
JB/T 11267 in the provisions.
6.5.3.4 air distribution device shall comply with the following requirements:
a) each Taipower precipitator inlet should be provided with a perforated plate or other form of flow control devices are to flow evenly through the flue gas
electric field;
b) the relative error of the theoretical distribution traffic flow of each chamber shall not exceed ± 5%;
c) electrostatic precipitator air distribution simulation test and gas distribution shall comply with JB/T 7671 and DL/T 514's.
6.5.3.5 support shall meet the following requirements:
a) In addition to a fixed support, the other way and universal support for the activities;
b) After the bearing mounting surface elevation deviation of ± 5 mm.
6.5.3.6 hopper should meet the following requirements:
a) along the length of the hopper span Fang Xiangyi limited to a single field, such as more than one field, should have short-circuited to prevent smoke
Measures; the number in the width direction should be minimized;
b) hopper plate thickness is determined by the physical characteristics of the ash and soot buckets, usually not less than 5 mm;
c) in the hopper should be fitted with a spoiler, the lower should be kept away from the ash discharge port, oblique angle of hopper wall and the horizontal plane should not be less
At 60 °, the inside of the angle of adjacent walls should be made of arc;
d) volume of the hopper should satisfy the maximum amount of dust running at full capacity 8 h of ash storage capacity required by heavy ash bucket ash storage hopper full state
120% state calculation;
e) measures hopper should be heated. When using steam heating, the heating surface should be evenly distributed in the lower part of the hopper less than 1/3
The surface; when using electric heating, proper thermostat;
f) hopper shall be provided to poke holes and anti-gray ash flow bonding or arching facilities; when using a gasification unit, each hopper should be installed
Set up a group of gasification board, should be designed to avoid the ash poke holes.
6.5.3.7 Insulation should be designed to comply with DL/T 5072 and meet the following requirements:
a) shall ensure that the use of ESP flue gas temperature above the acid dew point temperature above 10 ℃ (except low-temperature low ESP);
b) insulation range includes inlet and outlet smoke box, shell, hopper, cover, etc;
c) guard laying should be firm, smooth and beautiful.
6.5.3.8 rectifier transformer lifting facilities shall meet the following requirements:
a) should be able rectifier transformer hanging from the top to the ground, and a corresponding hole and rope length;
b) The electric motor should be moisture-proof, and safety measures;
c) under the oil-immersed silicon rectifier transformer oil storage tank should be set up, each of the storage tanks should lead to the ground lead pipe.
6.5.4 Steel Structure Design Requirements
6.5.4.1 Steel design should be consistent with GB 50009, GB 50011, GB 50017 and GB 50018 requirements.
6.5.4.2 Electrostatic Precipitator Steel should be able to withstand the loads include:
a) ESP load (weight, heavy insulation, ancillary equipment heavy, heavy ash storage, etc.);
b) seismic loads;
c) wind loads;
d) snow loads;
e) the maintenance load;
f) part of the flue load.
6.5.4.3 Dust support structure should be self-supporting, and will make all vertical and horizontal load transfer to the column basis.
6.5.4.4 ESP steel design temperature of 300 ℃.
6.5.5 Materials and paints
6.5.5.1 steel load-bearing structure of steel should adopt the Q235, Q345 steel, Q390 Q420 steel or steel.
Load-bearing structural member and 6.5.5.2 of the following conditions should not use boiling steel Q235:
a) welded structures: Direct withstand dynamic loads or vibration fatigue loads and requires checking structures; temperature below -20 ℃
Direct withstand dynamic loads or vibration load but may fatigue checking the structure, as well as to withstand static load of flexural and tensile
Important load-bearing structure; temperature equal to or lower than -30 ℃ of all load-bearing structure;
b) non-welded structure: Operating temperature equal to or lower than -20 ℃ directly withstand dynamic loads.
6.5.5.3 load-bearing structure of steel should have the tensile strength, elongation, yield strength and qualified sulfur and phosphorus content of the guarantee,
For welded structures should also have a carbon content of assurance of conformity. Welding load-bearing structure and the important non-load-bearing structure using steel welding
Cold-formed material should also have assurance of conformity experiments.
6.5.5.4 The need for checking fatigue of welded structures of steel, should have room temperature impact toughness qualified assurance. When construction work
When the temperature is between -20 ℃ ~ 0 ℃, Q235 and Q345 steel steel should have 0 ℃ impact toughness of assurance of conformity; for Q390
Steel and Q420 steel should have -20 ℃ impact toughness qualified assurance. When the structure of the working temperature is not higher than -20 ℃, for Q235
Steel and Q345 steel should have -20 ℃ impact toughness of assurance of conformity; Q420 to Q390 steel and steel should have -40 ℃ impact toughness
The assurance of conformity.
6.5.5.5 Steel materials shall comply with GB/T 11352 of.
Connecting material 6.5.5.6 Steel shall meet the following requirements:
a) welding should be consistent with GB/T 5117 or GB/T 5118 regulations. Or directly subjected to dynamic loads and vibration load required
Checking the structure to fatigue, with a low hydrogen electrodes;
b) manual welding materials shall comply with JB/ZQ 3687, the semi-automatic welding or soldering material shall comply SDZ 019
Provisions.
6.5.5.7 paint shall meet the following requirements:
a) should be coated steel rust primer and paint;
b) Electrical equipment paint coating shall comply with JB/T 9535's;
c) before the device packaging should be coated with anti-corrosion paint.
6.5.6 ESP Selection step, see Appendix B.
6.6 baghouse design
6.6.1 General provisions
6.6.1.1 baghouse design should consider the following conditions:
a) system overview, technical parameters including boilers, desulfurization way, way denitration, Fan, boiler dust manner, pot
Furnace slag methods;
b) smoke physicochemical properties, including particle size, density (including bulk density and true density) and angle of repose, etc;
c) flue gas composition, including SO2, SO3, NOX, O2, CO2, CO, H2O and the like;
d) flue gas parameters, including the amount of flue gas inlet bag filter, bag filter inlet flue gas temperature, flue gas dew point temperature,
Baghouse dust at the entrance to the largest concentration of flue gas;
e) site meteorological and geographical conditions;
f) bag filter covers, ash mode;
g) bag filter time investment costs, the filter life requirements, operating costs (water, electricity, spare parts, etc.);
h) bag filter operation, maintenance and management of user requirements;
i) dust recycling value and use of the form;
j) design and verification coal coal coal quality data;
k) bag filter outlet emission limits and collection efficiency.
6.6.1.2 the overall performance of the bag filter selection requirements include baghouse outlet dust emission concentration, the body pressure drop,
Body leakage rate and annual operating hours. Wherein the outlet concentration of dust emissions and annual operating hours shall be determined in accordance with design requirements.
6.6.1.3 baghouse support structure should be self-supporting, and will make all vertical and horizontal load transfer to the column base
on.
6.6.1.4 baghouse steel design temperature of 300 ℃.
6.6.1.5 for general dust, cleaning bag filter should be used online; superfine and sticky dust can be cleared offline
gray.
6.6.1.6 baghouse dust design should be based on the nature of resistance, cleaning method and frequency, inlet concentration, the concentration of emission, transport
Line consumption, bag life and other factors considered, the final resistance is generally not more than 1500 Pa.
6.6.1.7 baghouse dust treatment amount of gas imported by their actual volume flow meter taken. When the filter area calculation does not consider system
System leakage.
6.6.1.8 baghouse cleaning method shall be determined by the physical properties of dust. Coal-fired boiler flue gas line should adopt the jet bag
Dust or rotary pulse jet baghouse.
6.6.1.9 should be used outside the filter baghouse filter form.
6.6.1.10 bag filter structure according to the maximum load pressure of 1.2 times the design pressure.
6.6.1.11 baghouse filter area according to formula (1):
fu
QA ⋅ = 60 (1)
Where: A - filter area, m2 (should be added off-line cleaning filter units offline filter area cleaning);
uf - filtration velocity, m3/(m2 · min);
Q - the amount of dust and gas processing (anti-hair dust category should also include the amount of anti-hair), m3/h.
6.6.1.12 number baghouse filter bag according to formula (2):
DL
An π =. (2)
Where: n- bag number, calculated after rounding;
A- dust filter area, m2;
D- single bag outer diameter, m;
L- length of a single bag, m.
6.6.1.13 baghouse filtration velocity selection should consider the characteristics of soot, dust collector pressure drop, cleaning method and emission
Concentration, according to engineering experience and value of similar projects analogy. The following situations should choose low filtration velocity:
a) dust particle size is small, the proportion of small, sticky;
b) a high concentration of dust, large mill cut.
6.6.1.14 dust filter chamber inlet and outlet should be set changeover valve, and with automatic or manual valve position identification, flow
Indicator.
6.6.1.15 switching valve should be reliable, flexible and tight, the valve body and the valve plate should have good rigidity.
6.6.1.16 baghouse should adopt motivated wind or the middle into the wind. Regardless motivated wind, central air intake or feed hopper
Wind manner be provided with efficient means of diversion.
6.6.1.17 baghouse ash buckets of ash equipment maintenance should be considered during the ash storage capacity, the taper should ensure the flow of dust
Angle should be smooth, horizontal and slant hopper is not less than 60 °.
6.6.1.18 baghouse tubesheet design should meet the following requirements:
a) flower plate thickness should take 5 mm ~ 6 mm;
b) flower board stiffener height of not less than 50 mm, rib thickness should be greater than 5 mm;
c) flower board flat, smooth, there should be no deflection, uneven and other defects, flatness deviation of not greater than the length of 2 ‰;
d) flower plate hole center positioning deviation is less than 0.5 mm, flower plate aperture deviation 0 ~ 0.5 mm.
6.6.1.19 baghouse hopper upper part should not be located or servicing aisle laying mesh grille. Should not be located in the lower part of the housing Manhole,
The lower part of the hopper should be set up to check the bag for easy inspection door installation, adjustment guidance bag.
6.6.1.20 When the net gas chamber height is greater than 2 m, should be located in the side of the net gas chamber Manhole top vents should be established to facilitate mining
Light, ventilation and filter bag installation.
6.6.1.21 When purifying high temperature, high humidity and corrosive gas, clean the gas chamber bag filter surface should be done at a high temperature corrosion
Management.
6.6.1.22 manifold box design, manufacturing and testing shall comply with the provisions of JB 10191. Which may be rectangular or circular cross section,
Bottom drain valve should be set.
6.6.1.23 electromagnetic pulse valve main technical parameters are: Model specifications, working pressure and temperature, flow characteristics, resistance
Characteristic, switching characteristics, power supply parameters, diaphragm life and versatility like.
6.6.1.24 submerged pulse valve should be arranged horizontally on the manifold box, the outlet center should coincide with the center of the body, can not be partial
Shift and skew. Output port should be parallel with the valve seat.
6.6.1.25 injection tube should be reliable positioning and fixing device and easy removal and installation.
6.6.1.26 flower plate and frame filter bag should match each other three matches of the main contents and requirements include:
a) with pocket plate with flowers, that tightness, tightness and firmness;
b) Weight cuffs and pocket sized bag framework of cooperation, bag frame plate shall bear flowers;
c) clearance of the bag and the bag with the framework required tightness appropriate, taking into account the shrinkage of the bag;
d) the length of the bag and the bag with the frame, the bottom of the frame and the bottom of the bag should be a gap of 15 mm ~ 20 mm.
6.6.1.27 frame bag material is preferably cold drawn steel wire or stainless steel. Longitudinal reinforcement diameter of not less than 3 mm, the spacing should not be greater than
35mm ~ 40 mm; anti support ring wire diameter of not less than 4 mm, a pitch of not more than 250 mm.
6.6.1.28 bag frame should have sufficient strength and stiffness of joints should be firm, smooth, without cracks, dents and burrs,
It does not allow sealing off and weld.
6.6.1.29 When the filter bag framework for multi-section structure, the interface positions may not cause wear and tear on the bag, forms the interface should be easy to dismantle,
Loading.
6.6.1.30 filter bag framework should accordingly embalmed according to baghouse occasions.
6.6.1.31 bag packaging and shipping cartons should be used, and a water-resistant measures. Bag frame lifting and transportation should be dedicated
Shelves, should be placed in plastic bags and open-air rain has measures.
6.6.1.32 large bag filter should be set at the top of lifting devices, lifting the weight of not less than the maximum weight maintenance parts.
6.6.1.33 When the bag filter coal-fired boiler flue gas treatment, the ash removal system should be set up pre-coated, water cooling and other protective devices.
6.6.1.34 bag filter selection should comply with DL/T 387, comprising the steps in Appendix C.
6.6.1.35 bag filter technical parameters, see Appendix A in Table A.2.
6.6.2 Performance requirements
6.6.2.1 baghouse should be achieved to ensure the performance under the following conditions:
a) demand-side design conditions provided;
b) the flue gas temperature does not exceed the permissible filter constant temperature;
c) flue gas volume does not exceed the design capacity plus 10% margin.
6.6.2.2 The maximum noise level of 1.5 m from the bag filter housing does not exceed 85 dB (A).
6.6.3 body design requirements
6.6.3.1 baghouse body structure appropriate for the frame steel structure, ancillary facilities should include the platform, go ladders, railings, measuring point
And other security facilities. The design shall be GB 50017, GB 4053.1, GB 4053.2, GB 4053.3 relevant
Regulations.
6.6.3.2 baghouse design body should consider the following factors: the amount of flue gas treatment, dust removal process and device configuration,
Load distribution and characteristics, operation and maintenance, safety precautions, insulation and measuring point location.
6.6.3.3 The housing must meet the following requirements:
a) housing should be sealed, heat, rain, top water, housing body should avoid dead ends or dust accumulation;
b) carrying member baghouse should have sufficient rigidity and strength in order to ensure safe operation, bearing components shall comply
The provisions of GB 50017;
c) using the induced draft fan and booster fan merger, the response bag filter housing and related flue stiffness, strength
Accounting;
Materials d) the nature of the case to be treated flue gas is determined, the thickness of not less than 4 mm;
e) housing should be provided access doors, escalators, platforms, railings, retaining along, Manhole, channel, etc; circular diameter Manhole
At least 600 mm, rectangular Manhole size should be at least 450 mm × 600 mm; platform load should be at least 4 kN/m2, help
Ladder load should be at least 2 kN/m2, stairs, guard rails, platform security and technical conditions should be consistent with GB 4053.1, GB
4053.2, GB 4053.3 provisions.
6.6.3.4 air distribution device shall comply with the following requirements:
a) shall take appropriate guide means so that the flow channel of distribution with different theoretical flow relative error does not exceed ± 5%;
b) baghouse should configure the appropriate internal current sharing device to prevent the filter chamber produce local high-speed airflow.
6.6.3.5 support shall meet the following requirements:
a) In addition to a fixed support, the other one-way or all the support activities and universal fixed bearing, steel bracket
Reasonable to eliminate the interference of thermal expansion;
b) After the bearing mounting surface elevation deviation of ± 5 mm.
6.6.3.6 hopper should meet the following requirements:
a) hopper plate thickness is determined by the physical characteristics of the ash and soot buckets, usually not less than 5 mm;
b) the lower portion of the hopper should be kept away from the ash discharge port, oblique angle of hopper wall and the horizontal plane is not less than 60 °, angle of adjacent walls
The inside of the arc should be made;
c) volume hopper should satisfy the maximum amount of dust running at full capacity 8 h of ash storage capacity required by heavy ash bucket ash storage hopper full state
120% state calculation;
d) measures hopper should be heated. When using steam heating, the heating surface should be evenly distributed in the lower part of the hopper less than 1/3
The surface; when using electric heating, proper thermostat;
e) hopper shall be provided to poke holes gray ash flow and anti-bonding or arching facilities; when using a gasification unit, each hopper should be installed
Set up a group of gasification board, should be designed to avoid the ash poke holes.
6.6.3.7 Insulation should be designed to comply with DL/T 5072 and meet the following requirements:
a) shall ensure that the use of bag filter flue gas temperature above the dew point temperature is above 10 ℃;
b) insulation range includes inlet and outlet smoke box, shell, hopper, cover, etc;
c) guard laying should be firm, smooth and beautiful.
6.6.4 Steel Structure Design Requirements
6.6.4.1 Steel design should be consistent with GB 50009, GB 50011, GB 50017 and GB 50018 requirements.
6.6.4.2 Steel baghouse should be able to withstand the loads include:
a) baghouse load (weight, heavy insulation, ancillary equipment heavy, heavy ash storage, etc.);
b) seismic loads;
c) wind loads;
d) snow loads;
e) the maintenance load;
f) part of the flue load.
6.6.5 Materials
6.6.5.1 baghouse manufacturer shall comply with 328, HJ/T 329, HJ/T 330, JB/T 10341 regulations HJ/T . Bag
Shall comply with HJ/T 327 requirements, the filter bag framework should comply with JB/T 5917, the media should be consistent with HJ/T 324 and HJ/T 326
Regulations, electromagnetic pulse valve shall comply with JB/T 5916 and the provisions of HJ/T 284, the filter bag and also to comply with GB/T 6719 of
Provisions.
6.6.5.2 Filter selection refer to Table 4.
Table 4 Recommended filter selection table
Filter
No. S Always coal sulfur content flue gas temperature T (℃)
Ji Buke fiber weight (g/m2)
1 S <1.0% Ts≤T≤140 PPS PPS 550
2 S <1.0% Ts≤T≤160 PPS PTFE 550
3 1.0% ≤S <1.5% Ts≤T≤160 70% PPS 30% PTFE PTFE 600
4 1.5% ≤S <2.0% Ts≤T≤160 50% PPS 50% PTFE PTFE 640
5 S≥2.0% Ts≤T≤160 30% PPS 70% PTFE PTFE 680
6 S≥2.0% Ts≤T≤240 PTFE coating or coating PTFE 750
7 S≤1.0% Ts≤T≤240 P84 P84 550
8 1.0% ≤S <2.0% Ts≤T≤240 50% P84 50% PTFE PTFE 640
PPS: PPS acronym. PTFE: polytetrafluoroethylene abbreviation. P84: polyimide abbreviation. Ts: flue gas acid dew point temperature plus 10 ℃.
6.6.5.3 bag cage material usually used Q215 or Q235 and other high-quality low-carbon cold-drawn wire. Bag cage when required corrosion, optional
With 304, 316 or 316L stainless steel.
6.6.5.4 Select pulse valve bag shall be determined by the number, diameter, length, shape and amount of gas and the like. Pulse valve should meet
Co-JB/T 5916 provisions of.
6.7 Electrostatic Fabric Filter Design
Fabric Filter Design 6.7.1 Electric power zone should meet the requirements of 6.5, the design of the bag area should meet the requirements of 6.6, Electrostatic Fabric
A dust collector technical parameters see table in Appendix A.3.
Air distribution design 6.7.2 Electrostatic Fabric Filter should meet the following requirements:
a) design, numerical simulation tests should determine the different flue gas flow and optimize an inlet source in addition
Dust inside the air distribution;
b) the same intake source, different flue flow and the difference between the average flow of the flue should not exceed ± 5%;
c) the same filter inside each outlet damper flow and the difference between the average flow rate of not more than ± 10%;
d) electrical junction zone area should be arranged with the bags suitable diversion device to prevent high-speed air bag erosion and reduce the rise
airflow.
6.8 Dust pipe and accessories
6.8.1 General requirements for piping:
a) pipeline should be laid along the wall or column, you should leave appropriate distance between the pipes and beams, columns, walls, equipment and piping,
Net spacing not less than 200 mm; height of overhead line shall comply with the provisions of Table 2;
b) In order to avoid fouling horizontal pipe, piping layout can be tilted;
c) thermal power plant piping and dust induced draft fan inlet and outlet flue pipes should be rectangular;
d) shall prevent dust piping pipeline fouling, fouling and easy cleaning facilities should be set and the inspection opening (door).
6.8.2 dust wind pipe selection should consider the soot particle size, true density, abrasive, concentration and other factors, to prevent the wind pipe
High-speed pipeline increased wear and tear, caused by low wind speed to avoid pipeline pipeline fouling. Running at full capacity, the wind speed vertical pipeline should
Not less than 10 m/s, wind speed horizontal pipe shall be not less than 12 m/s. Dust pipe wall thickness should be based on the flue gas temperature, corrosive,
Diameter, span, reinforced abrasive manner and dust and other factors determine the thickness value of the reference DL/T 5121 requirements.
6.8.3 pipeline should have sufficient strength and stiffness, or should be reinforced. Pipeline reinforcement shall meet the following requirements:
a) strengthen tendons design should consider pipe diameter, the maximum temperature of the medium, the medium maximum pressure, design load and other factors;
b) When should the pipe diameter greater than 1500 mm on the outer surface of the pipe evenly disposed ribs, rib spacing can pipe
Setting a size of 1 to 1.5 times. Rectangular pipes can also be used to support internal auxiliary reinforcing way, struts should be used within 16 Mn steel,
When should take preventive measures of carbon steel pipe;
c) For pipes containing explosive gases and dust, ribs press DL/T 5121 requirements set;
d) a negative pressure in the flue run, should prevent lateral stiffener flanges by bending torsional buckling, when necessary, to set vertical heater
Gluten. Longitudinal stiffeners and transverse stiffeners should weld flanges.
6.8.4 delivery of high concentrations of dust, to dust abrasive dust and strong fumes, dust pipe elbows, tees and other vulnerable erosion portion
Measures should be taken to wear bit. Usually not less than the radius of curvature of the elbow pipe diameter.
6.8.5 pipeline connection with precipitators, fans, heat exchangers and other equipment should adopt flange connection. Pipe, elbow, tee
Connected by welding.
6.8.6 pipeline can be overlapped, fillet and butt three forms. Welding lap length not less than five times the plate thickness and
≥25mm.
6.8.7 Intermittent welding seam clearance should meet the following requirements:
a) In the compression member should not exceed 15 times the plate thickness;
b) the tension member should not be greater than 30 times the plate thickness;
c) For stiffener plate intramural sided staggered intermittent weld, which spacing can be 75 mm ~ 150 mm.
6.8.8 should be located on the suction pipe branch point manual control valve; automatically adjust the air flow should be located on the valve stem tube intermittent operation, and production
Interlock device.
6.8.9 pipeline valves form and function should be selected according to the flue gas conditions and process requirements. Technical parameters should include pipeline valves
Nominal diameter, nominal pressure, opening and closing time, drag coefficient, control parameters, while concerned about the valve temperature resistance, tightness,
Regulatory and other properties.
6.8.10 pipeline valve selection should be considered reliability, rigidity, tightness, wear resistance, corrosion resistance, temperature resistance, and
Shall comply with the following technical requirements:
a) opening and closing time: valve opening and closing time should meet the production process requirements and dust;
b) Security: For electric, pneumatic valve actuators should open and close function manually. For large diameter valve
Door, mechanical lock should be set on its transmission mechanism;
c) fixation: For large diameter valves, shall be provided a fixed manner and bearing, valve seat due weight to bear;
d) flows: valves should identify a clear flow direction;
e) the actuator position: transmission mode selection should be clear and actuator position.
6.8.11 large diameter valve shaft should be arranged horizontally. When must a vertical arrangement, the valve plate shaft thrust bearing structure should be used. "often
Closed "valve should be set in a vertical pipe, the pipe in order to prevent fouling.
6.8.12 When the flue gas temperature higher than 120 ℃ when transported in the pipeline and the arrangement can not rely on their own compensation, pipes should be set
Compensation; compensation should be set at both ends of the pipeline activities bracket.
6.8.13 fan import and export shall be provided flexible joint, its length 150 mm ~ 300 mm is appropriate, instead of pipe connections
It should set a fixed bracket.
Special parts 6.8.14 precipitators, flue gas heat exchanger inlet and outlet piping, equipment exhaust port, air vents and other tests should be set
hole. The position of the test hole should be selected in smooth air flow pipe. The number and distribution of test wells should be consistent with the provisions of HJ/T 397's.
Test holes should test platform and railings.
6.8.15 pipe insulation measures should be taken.
6.9 unloading, Ash
6.9.1 precipitator dust collected recycling should meet the requirements of GB 50019.
6.9.2 precipitator ash hopper and intermediate storage hopper ash discharge port should be set flapper valve ﹑ cinder valve, ash spool and the corresponding strength
Transportation, machinery and transport equipment gray or flush.
6.9.3 Ash Handling System should adopt positive pneumatic conveying system, when the conditions are appropriate, may also have a negative pressure pneumatic conveying system or machine
Mechanical delivery systems. Cinder process should not produce secondary pollution.
6.9.4 ESP ash weight distribution differences in each electric field is large, discharge capacity ash device should take full account of each field
Ash different weight distribution, and an electric field is considered before decommissioning, on the back of the electric field cinder, ash lose influence equipment.
Under 6.9.5 baghouse ash distribution in each hopper are basically the same, unloading, Ash equipment can be (a) force can be considered phase
The same configuration.
6.9.6 The use of electric Fabric Filter, unloading, Ash equipment necessary to consider the characteristics of the electrostatic precipitator, but also consider the dust bag
Characteristics of the.
Sinotrans 6.9.7 precipitator dust should be collected to avoid secondary pollution, we should adopt the dust humidifier, cinder dust or dust-free loading port
Action devices. Under conditions permitting, should use a vacuum suction pressure to send tankers.
6.9.8 ash device should be able to meet the design capacity of the ash, ash smoothly and maintain good air tightness, to avoid dust leakage
And air leakage.
6.9.9 above the dumping of ash valve there should be a certain degree of gray seals. Gray seal height according to the formula (3) Estimation:
1001.0 Δ × = ρ
PH (3)
Where: H- gray seal height, mm;
P △ - the absolute value of the negative pressure within the dust collector, Pa;
Ρ- bulk density of dust, g/cm3.
6.9.10 ash discharge system shall be provided with the necessary lifting and overhaul venue.
7 main process equipment
7.1 electrostatic precipitator high voltage power supply
7.1.1 high-voltage rectifier transformer shall comply with JB/T 9688's.
7.1.2 high-voltage rectifier transformer shall be suitable for outdoor (indoor) usage requirements, should be used outdoors as one type.
7.1.3 high voltage rectifier transformer secondary should be current, voltage and temperature signal sampling interface.
Not respond to radio, television, telephone and other communications equipment factory interference 7.1.4 high voltage rectifier transformer work.
7.1.5 high-voltage output terminal before entering the field should be configured with the appropriate high voltage damping resistor.
7.1.6 high-voltage rectifier transformer should be no leakage, oil leakage.
7.1.7 high-voltage rectifier transformer should paint (spray) front surface rust treatment, anti-salt spray paint should be used in coastal areas.
7.1.8 should be installed high-voltage rectifier transformer gas relay or pressure relief valve.
7.1.9 before the high voltage power supply factory conditions should be simulated operation test, the test method is executed according to the provisions of JB/T 5845's.
7.1.10 high voltage power supply should be based on the characteristics of aerosol emissions and environmental requirements to select, and compare the performance characteristics of various high voltage power supply
See Appendix D.
7.1.11 of energy saving, high-voltage power supply may be preferred high frequency power supply, the technical requirements of Appendix E.
7.1.12 high voltage power supply shall comply with HJ/T 320's.
7.2 induced draft fan and motor
Induced draft fan 7.2.1 300MW and above units should use axial fans, 300MW units below the level speed can be selected
Centrifugal fan.
7.2.2 should choose energy efficient fans. When choosing the induced draft fan in its work point should be within the range of 90% maximum efficiency of the fan.
7.2.3 silencer for special requirements, priority should be given low-noise, low-speed fan; if necessary take silencer, sound insulation,
Damping measures.
7.2.4 In order to prevent the induced draft fan cold starting and running motor overload, induced draft fan should be configured to start units and (or) air volume control
Equipment; dust removal system for large variable load induced draft fan and motor, can be added or frequency coupling means.
7.2.5 Selection of induced draft fan air volume calculation should be calculated on the total amount of air leakage exhaust pipe network and the amount of additional equipment in the dust pipe network.
7.2.6 Selection of calculation should be induced draft fan air volume and pressure in terms of the whole argument value fan sample calibration state, pursuant to select the wind
Model.
7.2.7 After the induced draft fan is selected, the fan should be under actual working conditions required motor power calculation lead.
7.2.8 After the motor is selected, the selected motor power should be checked according to special conditions dedusting process that may arise, such as winter
Operation, cold start, overload operation and other production.
7.2.9 When selecting fan, it should be clearly cooling and motor bearing housing, the regulator valve actuator position, electrical wiring
Boxes bearing and so on.
8 Inspection and Process Control
8.1 General Provisions
8.1.1 testing equipment and process control systems automatically detect the dust removal process should meet the proposed automatic adjustment, automatic control and protection
Protection requirements.
8.1.2 low-voltage power distribution design should be consistent with the provisions of HJ/T 321, and electrical and automatic control system design should be consistent with GB/T 3797 regulations
set.
8.1.3 Design of electrical products in the selected components and materials should be qualified products, give priority to energy-efficient equipment and stereotypes
product.
8.1.4 Automatic level control level should be collecting technique and technology, financial condition, operating environment conditions, maintenance, operation and management of water
Flat to adapt.
8.1.5 Dust control system should be preferred in situ real-time control system for automatic operation and remote control and management system is not installed
Can still ensure the normal operation of the system when the system.
8.1.6 Dust control system should have both automatic and manual control modes, the former for the dedusting system during normal operation
Control, which is used for commissioning or maintenance overhaul, temporary or automatic control system process or operation when a fault occurs. And by far
Cheng automatic/manual switch for automatic and hand control conversion.
8.1.7 dust removal system should be set up set of operating system in the control room dust, and contact with the central control room through communication, at any time was
It shows its working state.
8.1.8 Dust control system operation should have start and stop order system, interlocking system and production process equipment, operating parameters
Limit alarm and automatic protection.
8.1.9 disk control system involved, box, cabinet protection rating shall comply with the provisions of GB 4208, when its indoor installation Protection
Rating of not less than IP30, outdoor installation of its protection not less than IP55. It should be noted explosion-proof, dust-proof, waterproof, shockproof,
Anti-corrosion, anti-high temperature, anti-static, anti-electromagnetic interference, anti-intrusion of small animals such matters.
8.2 Detection
8.2.1 dust removal system to be detected include:
a) import and export dust flue gas temperature display and limit alarm;
b) precipitator ash hopper ash position limit alarm;
c) dust collector hopper heating temperature and dew point temperature display alarm;
d) ESP outlet flue gas turbidity (concentration) display;
e) baghouse differential pressure gauge display and alarm;
f) primary voltage electrostatic precipitator high voltage power supply unit, primary current, secondary voltage, secondary current.
twenty one
8.2.2 according to project needs, bag filter system should detect the other additions include:
a) gas flow;
b) spray cooling system water pressure and flow;
c) the outlet dust concentration exceeded display and alarm;
d) flue gas oxygen content and oxygen content limit alarm;
e) of the pressure chamber;
f) cleaning air pressure gauge display and alarm;
g) and cleaning fan current limit alarm.
8.2.3 according to project needs, ESP system should detect the other additions include:
a) ESP insulator beam heating temperature and dew point temperature display alarm;
b) a cathode precipitator rapping insulator heating temperature and dew point temperature display alarm;
c) high-voltage rectifier transition temperature and critical temperature display, temperature alarm danger;
Time overcurrent d) high-voltage power supply device, partial excitation, phase, the secondary side short circuit, open circuit and the second alarm;
e) rapping phase motor circuit, overcurrent alarm.
8.2.4 precipitator temperature monitoring instruments measuring point should be located at the precipitator inlet and outlet straight pipe sections, each place should be at least two test points,
Whichever is the average temperature. Precipitator ash hopper heating temperature measuring points should be arranged outside the hopper wall.
8.2.5 temperature detection can be temperature transmitter or temperature sensor. When using thermocouples, the instrument should be used with matches
Compensation wire.
8.2.6 flue dust precipitator detection system components should be measured once the wear measures. Anti-pipeline pressure detection hole should
Blocking measures.
8.2.7 Each hopper should be set high level switch can also be set low level switch, if necessary.
8.3 Process Control
8.3.1 content should be automatically controlled dust removal system comprising:
a) dust boot, shutdown interlock control;
b) bag filter cleaning automatic control;
c) air cleaning system control;
d) pre-coated gray control (fly ash tanker precoating system);
e) Dust control system valve;
f) hopper heating system control;
g) cinder, ash control means;
h) ESP high voltage power supply control;
i) ESP rapping system control;
j) ESP run over-temperature alarm and automatic protection.
8.3.2 Dust control system should be based on technical standards and requirements of the production process, the amount of dust and gas systems, operating conditions,
Integrated management is determined. Control methods are mainly the following:
a) PLC PLC HMI (Human Machine Interface) control system;
twenty two
b) PLC programmable controller PC (PC) monitoring system;
c) DCS control system;
d) DCS distributed control system PLC programmable controller engineering station and operator station monitoring system.
8.3.3 dust removal system should focus on the main parameters of a screen, updated operating parameters is not more than 1s.
8.3.4 Automatic control system should have the ability to store the main operating parameters of the precipitator. The main operating parameters of data should precipitator
Meet the requirements of the relevant authorities.
8.3.5 Control System should be used with matching hardware system software, and provide software security measures.
8.3.6 baghouse dust control should have fixed differential pressure, timing and manual three models can be converted to each other. Cleaning procedures should
Energy pulse width, pulse interval, while the number of pulses to adjust the valve operation.
8.3.7 Top rapping type ESP should be able to test for a single point of rapping, rapping height adjustable and does not guarantee the rapping hammer hoisting;
When the rapping hammer failure, should be able to locate the fault location.
8.3.8 flue damper valve should be set up manual and automatic control, and testing, show the valve switch state. Its execution machine
When the control system configuration of power failure, loss of power should be able to maintain a position in front of or in a safe position.
8.3.9 unloading, Ash automatic interlock control order: boot, should be in the order from back to front, followed by open ash machinery,
Cinder valve to open; shutdown, first off cinder valve, and then follow the order from front to back, and then click Close Ash machinery.
9 Main aided engineering
9.1 Supply and Distribution
9.1.1 distribution equipment arrangement should follow the safety, reliability, and economic principles apply, and easy to install, operate, handling,
Maintenance, testing and monitoring.
9.1.2 Distribution Design for dust removal system should be consistent with GB 50217, GB 50052, GB 50054, GB 50057, GB/T
14048, GB 7251, DL/T 620, DL/T regulations 5044, DL/T 5137's.
9.1.3 When the supply voltage, frequency variation within the following ranges, all electrical equipment and control systems should be able to work properly: lose
Continued volatility in the AC voltage range does not exceed the rating of ± 10%, input AC voltage and frequency range does not exceed ± 2%.
9.1.4 distribution lines should be installed short-circuit protection, overload protection and earth fault protection, specific provisions are as follows:
Short circuit protection a) distribution lines should cause dangerous heat effects of short-circuit current generated by the conductors and connectors and mechanical action
Before cutting off the short circuit current harm;
b) distribution line overload protection conductor temperature rise should overload current caused by the insulation of the conductors, connectors, terminals or
Around the conductor material damage before cutting off the load current;
c) ground fault protection should be set to prevent indirect personal electric shock and electrical fires, line damage and other accidents.
9.1.5 dust removal system and low voltage distribution cabinet should be not less than 15% of the spare circuit.
We should try to make the power of three-phase load balance 9.1.6 product supply circuit design.
9.1.7 should be set on the filter body repair power and lighting distribution box, and use waterproof, dustproof, corrosion and with shields
Lamps.
9.1.8 precipitator grounding should implement the provisions of DL/T 514, and to comply with the following requirements:
a) rectifier transformer enclosure shall be not less than 50 mm2 cross-section of bare copper braid or 4 mm × 40 mm galvanized flat
twenty three
Iron firmly grounded () ground high-voltage rectifier bridge should be not less than 50 mm2 multi-core cable alone with this filter
Body connected to ground;
b) dust removal system electrical control cabinet grounding resistance should be less than 2Ω, and connected to the company network.
9.1.9 Cable laying and shall meet the following requirements:
a) in the filter body design should provide conditions for cable tray laying on the body;
b) the need to ground electrical equipment shall be provided with ground terminals and clearly marked;
c) lead to the control panel rectifier transformer shielded signal cables and other power cables should not be in the same layer of cable laying on the bridge;
Communication shielded cable d) equipment, and other power cables should not be in the same layer of the cable bridge laying.
9.2 Architecture and Structure
9.2.1 General provisions
Architectural design and structural design 9.2.1.1 ESP project should be consistent with GB 50007, GB 50010, GB 50017 and other countries
And current industry standards, norms.
9.2.1.2 ESP Engineering and building design should be based on the production process, natural conditions, the relevant design and reasonable to carry out building level
Face arrangement and combination of space, and pay attention to architectural effect in harmony with the surrounding environment, the choice of building materials and land conservation.
9.2.1.3 Construction (structures) shall comply with the provisions of fire protection design of GB 50016.
9.2.1.4 Building interior noise control design should be consistent with the provisions of 87 GB J.
9.2.1.5 Buildings should give priority to natural light and indoor natural light illumination of buildings shall comply with GB/T 50033 of.
9.2.2 precipitator base body
9.2.2.1 ESP based on the type and structure of the device should be based on the column foot size, nature and distribution of the load, geological conditions, ground
Case design and other buried objects.
9.2.2.2 ESP or steel stent can be reinforced concrete structure, strength should meet the most unfavorable combination of loads
Role.
9.2.2.3 Load and distribution of electricity dedusting equipment should consider the following load:
Permanent loads a) ESP equipment (including weight, insulation, ancillary equipment, etc.);
b) Variable Load: load operation (including the weight of the ash deposit), wind loads and snow loads, installation and maintenance of load (refer to
Repair or installation, temporary personnel and weight machines, etc.);
c) temperature stress (refer to import and export filter, ESP and external connections, etc. When the temperature changes with the outside world production
Students thermal stress);
d) earthquake.
9.2.2.4 top of the foundation and embedded steel bolts position size should be consistent with the soles of the feet and screw device column positioning dimensions.
9.2.2.5 ESP foundation should be higher than the top surface of the ground is not less than 150 mm, to prevent rainwater from soaking device pedestal.
9.2.2.6 In order to reduce the thermal stress and deformation at high dusty gas to produce ESP, ESP should be used to support activities in support
Seat (reserved a fixed bearing) or hinged bearing.
9.2.3 distribution room and control room
9.2.3.1 distribution room and control room location should meet the following requirements:
twenty four
a) close to the load center;
b) into the convenient outlet;
c) There should not be located in the violent vibration;
d) should not be located in dusty or corrosive gases;
e) should not be located in low-lying places possible water;
f) should not be located in the toilet, bathroom or below other sites often stagnant water, and should not be adjacent to these places.
9.2.3.2 distribution room roof load-bearing member of the fire resistance rating not less than two, the rest of not less than three.
9.2.3.3 When a distribution chamber longer than 7 m, two exits should be provided, and should be arranged at both ends of the distribution chamber. When the distribution chamber mining
With double arrangement, the outlet upstairs section should have at least one emergency exit leading to the channel layer or outdoors.
9.2.3.4 distribution room door should open outwards, the door between the adjacent power distribution room should be a two-way open the door.
9.2.3.5 in the basement floor of the house and power distribution room, equipment transport corridors should be located, and shall have good ventilation and reliable photo
Ming system.
9.2.3.6 distribution room doors and windows should be sealed well; and outdoor communication holes, vents should be located to prevent rats, snakes and other small animals into
The grille. Vents communicating directly with the outside should also take the rain, Piao into measures to prevent.
9.2.3.7 control room on the ground floor should be higher than outdoor 300 mm, when the plant can be set up within the plant and the ground phase
level.
Inlet and outlet should consider convenient (especially overhead line or outlet) on the high-voltage power distribution room layout 9.2.3.8. High-voltage distribution
Room fire resistance rating should not be less than two. Low-voltage power distribution room fire rating should not be less than three.
9.2.3.9 maintenance of high voltage switchgear fixed size channel: single arrangement, the former cabinet a minimum of 1500 mm, thickness of cabinet
800mm. Maintenance of low-voltage switchgear fixed size channel: single arrangement, the former cabinet a minimum of 1500 mm, thickness of cabinet
1000 mm.
9.2.3.10 In small indoor high voltage switchgear high-voltage distribution when the number (six or less) and low voltage distribution panel can also be arranged in the same
indoor. Such as high and low voltage switchgear cabinet top when there exposed energized conductors separate arrangement between the net and low voltage distribution panel High Voltage Switchgear
From not less than 2m.
9.2.3.11 low voltage power distribution room should be as close to the transformer, the transformer is usually adjacent to the wall, to reduce the length of the bus.
9.3 Compressed air
9.3.1 Compressed air is mainly used in pulse-jet bag filter pulse valve, air bag, dry ash conveying, pneumatic devices with
gas. When users lack the gas source or gas does not meet the parameter requirements, you should set up a new compressed air supply system.
9.3.2 Design of compressed air supply system shall comply with the provisions of GB 50029.
Preparation and supply flow of compressed air should be used in 9.3.3 as follows: air compressor, buffer tank, dryer, gas tank site,
Valves, gas regulator package.
9.3.4 single displacement greater than or equal to 20 m3/min and a total capacity equal to or greater than 60 m3/min of compressed air station should be established
Overhaul with lifting equipment.
9.4 heating, ventilation and water supply and drainage
9.4.1 Heating, ventilation and air-conditioning indoors, to determine the outer design parameters should be consistent with GB 50019 and DL/T 5035 regulations
set.
9.4.2 The total heating area control room, computer room, the total laboratory, electrical room, power distribution stations, substations and other outside except winter heating,
Summer should be ventilated cooling or air conditioning.
9.4.3 Water supply and drainage should comply with GB 50014 and GB 50015 and meet life, production and fire to
Demand, should also be of construction and installation, operation and management, and maintenance and security to provide convenient conditions.
9.4.4 Water must not cross the control room, power distribution equipment room and other electronic and electrical equipment.
9.4.5 fans, motors and other equipment cooling water should be taken from the plant's cooling water distribution network. When the plant without cooling water supply network, cooling
Media can use tap water.
10 labor safety, occupational health and fire
10.1 General Provisions
10.1.1 dust removal system design, construction, operation in accordance with relevant provisions of the State and the industry, to take measures to guarantee reliable protection
Protect the personal safety and health.
10.1.2 labor safety and occupational health facilities should meet the relevant national laws and regulations and GB Z 1, and should be subject
Project designed, constructed and put into production and use.
10.1.3 In a place with risk factors and occupational hazards should be set eye-catching safety signs, safety colors, warning signs,
Provided shall conform to GB 2894, GB 2893 and GB 2158 regulations.
10.1.4 dust fire and explosion engineering design should be consistent with the provisions of GB 50016, GB 50229 and the like.
10.1.5 dedusting process design, equipment design and electrical control design techniques should take effective security measures to avoid the
Sudden power, water supply, gas stops cause mechanical and electrical equipment, cooling systems and valves malfunction, production and prevent the occurrence of dust removal equipment
ACCIDENT.
10.2 OCCUPATIONAL SAFETY
10.2.1 Dust engineering design should be taken to protect and interim protective measures to prevent the production of non-stop, caused due to construction
Production equipment damage or casualties.
10.2.2 outdoor equipment and overhead pipes should have a good layer of protection should be the proper use of anti-corrosion coatings.
10.2.3 rotated at high speed or drive components should be fortified shield.
10.2.4 set up the necessary maintenance platform, to protect the safety of maintenance and overhaul; ladders, platforms, railings according to specifications into
Line shall be designed to meet the carrying capacity. Platform, the ladder should be not less than 100 mm of the skirting board; ladders, platforms, railings special
Feature size should be consistent with the requirements of ergonomics.
10.2.5 to eliminate static electricity generated by the system and equipment shall be the relevant standards for well-grounded, static grounding resistance
It should be less than 4 Ω.
10.2.6 overhead structures or equipment shall consider the relevant provisions of the standard lightning protection measures, the impact of grounding resistance of each of the deflectors
It should not exceed 10 Ω.
10.2.7 of the proposed use of the old buildings and structures shall be safety review, if the problem should be taken to reinforcement, reinforcement, repair
Measures before use after passing.
10.2.8 hook, lifting beam, lifting hoist and other lifting device design safety factors should be considered essential, and prominently marked at
Xu limit loading crane.
10.2.9 shall be the relevant standards of the facilities, equipment, pipelines with safe color for hazardous areas and provided
Tracking setting security identity.
10.2.10 dedusting process automatic control system should be linked to the production process, under accident conditions should be able to production processes and environmental
Implementation of conservation facilities.
10.3 Occupational Health
10.3.1 of the dust source, noise source and other production equipment and technology generated in the process control. Dust concentration in the air of workplace
Shall comply with the provisions of the State Design of Industrial Enterprises and workplace harmful factors related to occupational exposure limits; larger noise
Source should take sound insulation, noise reduction, sound absorption and other control measures to combat noise should be designed to meet the national standard GB J 87 of the relevant provisions.
10.3.2 jobs through comprehensive measures to prevent harmful thermal insulation, partitions, sound insulation, labor protection products, safety distance, alarms, etc.
It may harm the human body.
10.3.3 use dust humidifier, pneumatic conveying, dry sealed tankers and other measures to prevent the dumping of ash, resulting in secondary dust pollution when Ash
dye.
10.3.4 should use low-noise fan. The fan noise should take comprehensive measures noise and vibration damping, isolation, sound insulation, noise reduction
Noise pollution.
10.4 fire protection requirements
10.4.1 fire water should be supplied by the plant fire main network. Setting fire water system should cover all buildings and field area
equipment.
10.4.2 fire water pipeline should and production, potable water merge. Such as when the merger is not economically or technically feasible, may
Independent fire water supply system.
10.4.3 annular valve pipe applications into several separate sections, each section within the number of fire hydrants should not be more than five.
10.4.4 outdoor smallest diameter of the fire, water supply pipelines shall not be less than 100 mm.
10.4.5 outdoor fire hydrant shall be provided along the road as needed, and should be close to the crossroads, outdoor fire hydrant spacing should not exceed
120 m. Hydrant from the street should not be greater than 2 m, from the housing wall should not be less than 5m. Fire hydrant shall not exceed the distance
50 m.
10.4.6 electrical room, control room, mobile extinguishers nearby electrical equipment configuration shall comply with the provisions of GB 50140.
11 construction and acceptance
11.1 Construction
11.1.1 Dust construction units must have the appropriate national engineering construction qualification, should comply with the relevant state departments issued by
Labor safety and health, fire and other national mandatory standards and related construction specifications.
11.1.2 Dust construction project should design drawings and technical documents, drawings and other organizational construction equipment, construction should comply with national and
Construction industry requirements and program management file. Change the project design unit should be obtained before the implementation of design changes file.
11.1.3 dust removal equipment used in construction, materials, devices, etc. should comply with the relevant national standards, and should be made available
Suppliers of products before use certificate.
11.1.4 Top electromagnetic hammer rapping of ESP installation shall comply with JB/T 11267, the side portion of the mechanical rapping of ESP Security
Fitted shall comply with JB/T 8536's.
11.1.5 baghouse installation shall comply with the DL T 1121, JB/T 8471 regulations and/JB/T 8532's.
11.1.6 Electrostatic Fabric Filter installation should be consistent with JB T 8536 and JB/T 8471 requirements /.
11.2 Acceptance
11.2.1 acceptance
11.2.1.1 organizational units installed by the construction unit, suppliers, engineering units combined dedusting system into the system debugging
Bank acceptance, performance, security, reliability and other operating status of the machine and control equipment for examination.
11.2.1.2 Dust acceptance should be "Project (Project) final acceptance approach", corresponding to the current professional acceptance
And the relevant provisions of this standard be.
11.2.1.3 Electrostatic Precipitator Fabric Filter and electric power engineering inspection area shall comply with DL/T 514's.
11.2.1.4 bag filter and Electrostatic Fabric Filter Bags zone project acceptance shall comply with JB/T 8471's.
11.2.2 Environmental Acceptance
11.2.2.1 Dust project completion and acceptance of environmental protection according to the provisions "of acceptance of completed construction projects management approach" into
Row.
11.2.2.2 Dust project completion acceptance of environmental protection in addition to meet the "acceptance of completed construction projects management approach"
The conditions, dust removal performance test report as environmental protection and acceptance of technical support documents, mainly dust removal performance test report
Parameters should include at least: the amount of dust and gas systems, dust removal efficiency, precipitator dust emission concentration, the system resistance system
Air leakage rate, power consumption and so on.
The main technical acceptance based 11.2.2.3 dust engineering environmental protection include:
a) project environmental impact report, tables and approval documents;
b) pollutant discharge monitoring reports;
c) design documents and design documents approved changes;
d) Continuous Emission Monitoring Report during the test run;
e) complete dust engineering test run records.
11.2.2.4 After the dust removal project environmental protection acceptance, dust removal system before officially put into operation.
11.2.2.5 supporting the construction of flue gas emissions continuous monitoring and data transmission system should be carried out simultaneously with the inspection of environmental protection dust removal project
Income.
12 Operation and Maintenance
12.1 General Provisions
12.1.1 production unit should be set up environmental management agency, with specialized technical personnel and dust removal system detection equipment, in addition to the development of
Dust system operation and maintenance regulations.
12.1.2 without the approval of the local environmental protection department, can not stop running precipitator. Since the emergency caused by dust
Stop running, they should immediately report to the local administrative department of environmental protection, and stop as soon as the system is connected with dust production facilities
Prepared to run.
12.1.3 production unit should be checked regularly for dust collector systems and maintenance, to ensure stable and reliable operation of dust, the
Pollutant emissions should meet the national or local emission standards.
12.1.4 After the training staff positions through job evaluation should be familiar with the operation and maintenance requirements of the job, with the operation of skilled technical
Able, to observe labor discipline, strictly enforce the rules.
12.1.5 should be developed dedusting system, overhaul plans and contingency plans, inspection and test results should be recorded and archived.
12.2 Operation and Management
12.2.1 dedusting system operation and management personnel should be full-time configuration.
12.2.2 Plant operation and management personnel to deal with dust removal device for regular training to master the operation and management personnel in addition to
Specific operations and emergency treatment measures dust equipment and other ancillary facilities to normal operation.
12.2.3 Plant Health should establish a dust removal system, facility maintenance and production activities such as record-keeping system, the main contents of the recording
include:
a) the system starts, stop time;
b) recording system operating process control parameters, comprising at least: dust removal system inlet and outlet flue gas temperature, pressure, pressure
Compressed air pressure, voltage, current, etc., which in tabular form in Appendix F, Appendix G, Appendix H and Appendix I;
c) recording operation and maintenance of the main equipment of the case;
d) Continuous Emission monitoring data;
e) recording accidents and disposition;
f) regular testing, evaluation and assessment of the records and the like.
12.2.4 operators should adhere to good shift system and inspection system in accordance with the provisions of the plant.
12.2.5 hopper fouling treatment should meet the following requirements:
a) When the hopper fouling High Level alarm must be checked for ash transmission system operation, and to take measures to ensure Ash
Smooth, it shall give priority to the ash hopper ash to reduce ash position, lift the High Level alarm;
b) when the hopper dust accumulates electrostatic precipitator field trip to, stop supplying power to the corresponding electric field, we must close the corresponding power
Vibration anode playing field, to prevent anode system failure, and must be forced by an emergency or ash ash ash discharge means,
In order to ensure the safety of equipment;
C) When the ash must be forced to do security measures to ensure personal safety, to prevent ash bypass, due to the external force,
Sudden fall causing an accident;
d) post should analyze the reasons for fouling, check the conveying system, level meter, hopper heating and insulation is intact, thoroughly cleaned
In addition to failure to prevent the recurrence of accidents.
12.3 ESP system operation
12.3.1 ESP operation shall comply with the DL T 461 JB/T provisions/6407.
12.3.2 boiler before 24 h, hopper heating system should be put into operation; before running 8 h, girders insulators room heater,
Cathode rapping shaft porcelain room heater should be put into operation.
12.3.3 Smoke flammable, explosive substance concentration, flue gas temperature, operating pressure should meet the design requirements. When the flue gas conditions Yan
Heavy off-design requirements, threatening the security device can not be put into operation ESP.
12.3.4 ESP under high pressure output open circuit, disabling high voltage power supply is turned on. In high voltage circuit is open again
When the test should be equipped with the appropriate safety measures.
12.3.5 host downtime is not long and no maintenance tasks when the ESP is on standby, should meet the following requirements:
a) heating system continues to operate;
b) rapping, ash system based upon the Work state;
c) if necessary, an electric field with hot air heating.
12.3.6 found after running one of the following circumstances, should stop supplying power to the corresponding electric field, troubleshooting reboot:
a) the operation of a punch than the rated current;
b) high-voltage insulating member flashover serious;
c) the damping resistance flashover serious or even fire;
d) rectifier transformer over-temperature alarm, fuel injection, oil spills, abnormal sound;
e) the occurrence of serious side excitation power supply means;
f) current limit runaway;
g) the power supply device is try to vote twice each trip occurred;
h) High-voltage switchgear thyristor heat sink temperature exceeds 60 ℃;
i) system failures caused by the ash hopper ash fouling;
j) smoke condition serious changes, endangering equipment, personal safety appears.
12.4 baghouse system operation
12.4.1 upper use temperature of the filter is higher than the temperature of the inlet gas dust removal system; dust removal system inlet gas temperature is higher than
Gas acid dew point temperature above 10 ℃; the system resistance remains within the normal range.
12.4.2 winter or after baghouse outage alpine region, activated prior to the implementation of the pre-coat gray bag (or calcium hydroxide
Fly ash), and pre-launch hopper heating apparatus.
12.4.3 filter cleaning system should be established, or regularly scheduled cleaning resistance; dust discharge port, check the door closed to safety.
12.4.4 In the dust during operation, you should always check the operation of the injection system, when the pulse valve diaphragm, solenoid valves, etc.
In case of failure should be promptly treated. Close the regulator should be replaced when the air bag at the inlet valve, exhaust compressed air regulator within the package
Air, to prevent accidents.
12.4.5 should check the filter pressure drop per shift, abnormal should promptly identify the reasons for troubleshooting. It should be every six months
Observe the dusty gas export emissions, emission concentration increased significantly if found should be timely check processing.
12.4.6 precipitator run gas system should ensure that the pressure does not occur and the mutation does not appear to block the airflow.
12.4.7 According to the bag and the bag material usage, regular replacement of the filter bag.
12.5 Electrostatic Fabric dust removal system is running
Running 12.5.1 Electrostatic Fabric Cleaning System power zone should meet the requirements of 12.3.
12.5.2 Electric - bag Composite Dust bags running in the system area should meet the requirements of 12.4.
12.6 Maintenance
12.6.1 response filter inspection tours, identify problems promptly.
12.6.2 should tour inspection system and the ash hopper level meter working condition.
12.6.3 Weekly responsible for all transmission parts lubricating oil to conduct an inspection, do not meet the requirements should be handled.
12.6.4 should be replaced rectifier transformer respirator desiccant, once rectifier transformer insulating oil pressure test each year.
Every six months 12.6.5 should check the grounding wire and grounding, measure the grounding resistance precipitators should be specified.
12.6.6 Each shift should check the relay and switch boxes of locks, doors, ensure the integrity.
12.6.7 Each shift should check the lights and alarm functions, ensure the integrity.
12.6.8 After the shutdown, the field should be natural cooling (special circumstances, should be required to approve a program of special measures for cooling).
12.6.9 internal electric field maintenance personnel should wear helmets, dust-proof clothing, dust-proof boots, protective gloves and other protective clothing while doing
Good safety monitoring work.
12.6.10 pressure should be checked monthly and air quality, and ensure that it meets the design requirements.
12.6.11 weekly should check whether the meter is working properly, make sure that it reaches the requirements.
12.6.12 shutdown should check whether there are net gas chamber ash leakage, whether the bag mouth to take gray, injection tube and the center of the bag
Happening.
12.6.13 should use the product specification and the corresponding technical requirements carry out inspection and maintenance work.
12.6.14 should do the maintenance records.
12.7 Data Archive
12.7.1 commissioning and operation of various filter process should create a system of data archives, records should include precipitator
Parameters, ESP boosting recording, ESP run record, bag filter log and run Electrostatic Fabric Filter
Record, which in tabular form in Appendix A, Appendix F, Appendix G, Appendix H and Appendix I.
12.7.2 Other types of filter commissioning and operation of process data archives in tabular form with reference to the relevant electrostatic precipitator and baghouse
Form design execution.
Appendix A
(Informative)
Precipitator technical parameters
ESP technology parameters in Table A.1, bag filter technical parameters in Table A.2, Electrostatic Fabric Filter technical parameters, see
Table A.3.
Table A.1 ESP technical parameters
Parameter name Parameter name Unit Unit Structure
Dusty gas processing capacity m3/h room number
Inlet flue gas temperature ℃ m2 cross-sectional area
Inlet flue gas dew point temperature ℃ farm number
Flue gas inlet dust concentration (standard state) g/m3 effective field length m
Flue outlet dust concentration (standard state) mg/m3 farm effective height m
Flue gas velocity m within ESP/s effective field width m
S residence time in the same pole pitch mm
Dust drive forward speed m/s Collecting Type /
Than the dust collection area m2/(m3/s) total dust collection area m2
Operating pressure Pa discharge electrode pattern /
Running resistance Pa total discharge electrode length m
Design pressure Pa high voltage power supply equipment type /
Body resistance Pa high voltage power supply device parameters /
Leakage rate% Number of high voltage power supply equipment sets
Collection efficiency% Total weight kg
Table A.2 bag filter technical parameters
Parameter name Parameter name Unit Unit Structure
Number of dust and gas processing capacity m3/h per pulse valve chamber only
Filtration velocity m/min height mm space for bags
Compressed air pressure MPa room number
Each chamber bag several compressed air consumption m3/min
Bag material/ash device model/power/kW
Bag size (diameter × length) mm × mm air lock device model/power/kW
The total filter area m2 cleaning fan model/power/kW
℃ inlet temperature of flue gas cleaning fan air flow/pressure m3/h, Pa
Flue gas inlet dust concentration (standard state) g/m3 casing under pressure Pa
Flue outlet dust concentration (standard state) mg/m3 equipment Dimensions
(L × W × H)
m × m × m
Running resistance Pa Total installed power kW
Pulse valve Specifications/Total weight kg
Note: With the different types of dust, it is desirable on the table a number of items.
Table A.3 Electrostatic Fabric Filter technical parameters
Parameter Name Unit Parameter Item Unit
Dusty gas processing capacity m3/h total filtration area m2
Filtration velocity m/min cross-sectional area m2
Electric field flow velocity m/s farm number
Flue gas through an electric field effective length of time s m
Dust drive forward speed m/s m highly effective electric field
Than the dust collection area m2/(m3/s) effective field width m
Net filtration velocity m/min with pole spacing mm
Collecting the inlet flue gas temperature ℃ Type /
Inlet flue gas dew point temperature ℃ m2 total dust collection area
Flue gas inlet dust concentration (standard state) g/m3 discharge electrode pattern /
Flue outlet dust concentration (standard state) mg/m3 high voltage power supply equipment type /
Running resistance Pa high voltage power supply device parameters /
Design pressure drop Pa sets the number of high voltage power supply equipment
Compressed air pressure MPa pulse valve specifications /
Number of compressed air consumption m3/min per chamber pulse valve only
Ash device model/power/kW for bags space height mm
Air lock device model/power/kW per bag several chambers
Cleaning fan model/power/kW bag material /
Cleaning fan air flow/pressure m3/h, Pa Pa housing under pressure
The total installed power kW equipment Dimensions (L × W × H) m × m × m
Room number Total weight kg
Bag size (diameter × length) mm × mm
Appendix B
(Informative)
ESP Selection step
Selection of design conditions and requirements analysis
Adaptability study ESP
Selection of design conditions and requirements
Selection Design
Technical and Economic Analysis
ESP specifications determined

_A'Au Â7
Appendix C
(Informative)
Bag filter selection step
Determine the operating temperature and soot physicochemical properties
Choose cleaning method
Choose Filter
OK filtration area
OK filtration velocity
Determine the amount of dust and gas processing, the initial amount of dust
OK Cleaning System
OK bag filter specification
Appendix D
(Informative)
ESP high voltage power supply characteristics and comparative
D.1 several power main properties are compared in Table D.1.
Table D.1 main power supply performance comparison
Item single-phase three-phase SCR power SCR frequency power supply high-frequency power
Unbalanced three phase three phase three phase three phase
Peak voltage (72kV time) is greater than about 75kV 80kV 76kV 100kV about
Voltage ripple is greater than 50% 2% 5% 2% 5% - less than 1%
The average voltage ratio more than 1 125% or more than 130% 130%
Power utilization <70% to about 90%> 90%> 90%
Means (control and rectifier transformer) split split split one
Rectifier transformer increases weight and volume weight greater volume weight small volume weight small
Sparks Sparks feature a greater impact or shock spark sparking impact small spark small impact
Power supply
Easy to implement supply gap,
Pulse width
Difficult to achieve for the gap
Power, pulse width
Easy to implement for the gap
Power, pulse width
Easy to implement for the gap
Power, pulse width
Rectifier transformer noise a little big small
High power easy easy easy difficult
D.2 In practice, the power should be based on different conditions and engineering inputs to choose, including the following two aspects:
a) Analysis of Energy Saving
ESP high voltage power supply energy has two aspects, one is the efficiency of the power supply itself, namely the power of power utilization,
The other is the actual power consumption during operation of the electric field. High-voltage power to low power utilization is high frequency power supply> IF electric
Source> Three Phase SCR Power Supply> Single-phase SCR power; actual power consumption and the electric field and electrostatic precipitator operating conditions, power supply, control
Mode and other related products from different manufacturers may have different effects.
b) collection efficiency analysis
From the perspective of efficiency electrostatic precipitator, considering high voltage power supply depends on the choice of operating conditions. If the actual operation of spark electric field
Down current of the electric field is small, should try to use the secondary voltage of power supply ripple coefficient is small, you can choose a three-phase SCR power supply,
IF power, high-frequency power supply, compared with the single-phase SCR power supply, the three power can greatly improve the input power of the electric field,
Improve operational parameters, will help improve the efficiency of electrostatic precipitator; SCR if the single-phase power supply is running, running large current electric field
Voltage is high, close to the rating, and little spark, you can choose a larger three-phase power supply to further improve the power supply power injection
Rate increase collection efficiency.
D.3 high frequency high voltage power supply with a conventional single-phase SCR power supply output voltage waveform compare Figure D.1:
As it can be seen from Figure D.1, at the same peak voltage, the average voltage and high frequency high voltage power supply than a conventional power supply (single-phase
SCR power) is much higher. Three-phase SCR power supply, frequency power supply on the characteristics are similar to the high-frequency power supply; this feature is
These three conventional power supply with the most significant difference between the points.
D.4 frequency power supply compared with the three-phase SCR power supply, the main differences are:
a) a three-phase SCR power supply output ripple coefficient and frequency power than the single-phase SCR power supply is small, there is a similar average level
Voltage output value;
b) a spark off faster than a three-phase frequency power supply SCR, small impact, gap power than the three-phase pulse width frequency power supply
SCR power narrow;
c) power supply frequency power supply and three-phase SCR power using different control principles;
d) rectifier transformer frequency power supply noise is relatively large.
D.5 high frequency high voltage power supply compared with the frequency power supply, the main differences are:
a) high frequency high voltage power supply for the integrated structure, and frequency power supply for the split structure;
b) high-frequency power supply is more difficult to achieve, and power frequency power supply is not a problem;
c) high frequency high voltage power supply price is higher than the frequency power supply.
D.6 normal ESP power consumption depends on many factors in the design reached ESP collection efficiency under the premise, the main power consumption
To depend on the intelligent control system power. In general, the power consumption of a thermal power station of electric precipitator high voltage power supply device is not
Should exceed 0.5kW/MW. When reducing the power consumption of the electrostatic precipitator, should fully consider the energy consumption low pressure heating section, try excellent
Heating of the strategy to reduce unnecessary heating energy consumption. In the absence of automatic optimization means the case can also be run from ESP
Management optimization.
Figure D.1 secondary voltage waveform of the electric field
High-frequency power output U2
The average frequency output U2
The average high-frequency power output U2
Frequency power output U2
Appendix E
(Informative)
ESP high-voltage high-frequency power supply technology requirements
E.1 use of environmental and safety requirements
a) altitude does not exceed 1000m; if the altitude is higher than 1000m, according to the provisions of GB/T 3859.2 is accordingly
Correction;
b) the ambient temperature is not higher than 40 ℃, not lower than the pour point of the oil temperature of the transformer specified;
c) the maximum relative air humidity of 90% (relative to the air temperature is 20 ℃ ± 5 ℃ when);
d) no severe vibration and shock, the vertical gradient of not more than 5%;
e) running the place no conductive dust explosion, do not corrode metal and damage the insulation of gas or vapor;
f) three-phase AC input power conditions should be consistent with the provisions of GB/T 3859.1 of.
E.2 Technical Requirements
E.2.1 topology: three-phase full-bridge rectifier series resonant topology.
E.2.2 inverter resonant frequency: 20kHz ~ 50kHz.
E.2.3 load rating: The load rating of "" Class Ⅰ (100% of rated output current, continuous).
E.2.4 Overall Equipment Efficiency Power Factor and equipment: Equipment Power Factor ≥0.9; Overall Equipment Efficiency ≥90%.
Electrical strength E.2.5 high frequency voltage rectifier device:
a) transformer oil shall comply with GB/T 7595, the breakdown voltage is not less than 40 kV/2.5 mm;
b) insulation resistance of each charging circuit and ground (cabinet) is not less than 1 MΩ/kV; insulation resistance data for insulation
Before and after the test as a secondary sexual discrimination;
c) The charging circuit (except for the high-frequency transformer high voltage circuit) shall be subjected to any other circuit on the chassis and the insulation test,
These circuits and the test circuit is independent of each other.
E.2.6 device control functions:
a) Output adjustment range: the device should be able to output voltage at rated DC output current and 90% to 100% of the rated DC
The case of the stable operation; DC output current range: 0 to 100% of nominal; DC output voltage adjustment range: 0 ~
100% of the maximum output voltage value or corona onset voltage to 100% of the maximum output voltage value;
b) flashover test: under the premise of not less than 60% of rated voltage, the device allows at 150 beats per minute flashover state
Operation, assessment time 15min, if the arc should occur quickly extinguishing dust load, and the device should not be any
malfunction;
c) equipment operating parameters display: equipment operating parameters including at least one current, bus voltage, secondary voltage, secondary
Current. The operating parameter display error of less than 5%, the temperature display error ± 2 ℃. If counter meter, which indicates the value of the error
± 5%;
d) devices are generally not allowed to load open, momentary open circuit equipment, generally should not cause a malfunction;
e) Fault protection features: equipment operation, such as the following faults occur, the device should be able to automatically stop the alarm and trip
Display the type of fault. Fault types are: load short-circuit fault, open fault load, high-frequency transformer oil temperature gauge, power semiconductor
Conductor device failure, power semiconductors temperature gauge, etc;
f) equipment shall be able to withstand the power and stop at rated load conditions impact;
g) a variety of devices capable of communicating with a computer, the computer is set to accept commands and operating parameters, set parameters
Number, fault status to the computer.
E.2.7 Protection class: Cabinet protection device according to GB 4208. Dust with a high frequency high voltage rectifier equipment (except duct
Outside) the degree of protection not less than IP 54 or according to user requirements.
E.2.8 noise: noise equipment shall comply with the provisions of GB/T 3859.1 of.
Appendix F
(Informative)
ESP boost Record Form
Table F.1 ESP boost Record Form
Dust source and the name of the ESP specification supplier
High voltage power supply (A/kV) tap position
When testing sunny, cloudy, overcast, rain
Temperature (℃) and humidity (%) Wind (m/s)
Field test period, Room No. midnight - midnight
The first load test load test first test second time date
No. primary voltage
Primary current
Secondary voltage
Secondary current (mA) Remarks
Note: To observe the process of boosting the electric field inside the discharge phenomenon, observers can only enter the inner tube or hopper outlet horn
Inside were observed, can not enter the field, should be more than two observers, one in the body of the external monitor. In the process of boosting
As the internal electric field have found abnormal discharge phenomenon, all the high-voltage power supply should be turned off, and the whole ground isolation switch after discharge,
Maintenance personnel inspected before entering the field.
Test Leader: Recorded by:
Appendix G
(Informative)
ESP log table
Table G.1 ESP log table
Workshop Title
ESP Name
No dust
Device Model
Investigation position (check) filter inlet/outlet filter
date
time
System dusty gas volume (m3/h)
Systems vacuum (Pa)
Temperature (℃)
Fan valve opening (%)
Primary voltage (V)
Primary current (A)
Secondary voltage (kV)
Secondary current (mA)
Dust concentration (mg/m3)
Cleaning equipment in
Cinder equipment in
Ash equipment situation
Remark
Operator: shift squad: squad succession:
Appendix H
(Informative)
Baghouse log table
Table H.1 baghouse log table
Workshop Title
ESP Name
No dust
Device Model
Investigation position (check) filter inlet/outlet filter
date
time
System dusty gas volume (m3/h)
Systems vacuum (Pa)
Temperature (℃)
Fan valve opening (%)
Compressed air pressure (MPa)
System operating pressure (Pa)
Dust concentration (mg/m3)
Cleaning equipment in
Cinder equipment in
Ash equipment situation
Remark
Operator: shift squad: squad succession:
Appendix I
(Informative)
Electrostatic Fabric Filter log table
Table I.1 Electrostatic Fabric Filter log table
Workshop Title
ESP Name
No dust
Device Model
Investigation position (check) filter inlet/outlet filter
date
time
System dusty gas volume (m3/h)
Systems vacuum (Pa)
Temperature (℃)
Fan valve opening (%)
Primary voltage (V)
Primary current (A)
Secondary voltage (kV)
Secondary current (mA)
Compressed air pressure (MPa)
System operating pressure (Pa)
Dust concentration (mg/m3)
Cleaning equipment in
Cinder equipment in
Ash equipment situation
Remark
Operator: shift squad: squad succession:
Related standard:   HJ 2040-2014  HJ 2046-2014
   
 
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