Search result: HJ 178-2018 (HJ/T 178-2018 Older version)
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General technical specification of circulating fluidized bed flue gas desulfurization
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HJ 178-2018
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(General technical specifications for flue gas circulating fluidized bed flue gas desulfurization engineering)
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HJ/T 178-2018
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| HJ/T 178-2005 | English | 839 |
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Flue gas circulation fluidized bed desulfurization project technical specification of thermal power plant
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HJ/T 178-2005
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| Standard ID | HJ 178-2018 (HJ178-2018) | | Description (Translated English) | General technical specification of circulating fluidized bed flue gas desulfurization | | Sector / Industry | Environmental Protection Industry Standard | | Word Count Estimation | 29,270 | | Date of Issue | 2018-01-15 | | Date of Implementation | 2018-05-01 | | Older Standard (superseded by this standard) | HJ/T 178-2005 | | Regulation (derived from) | Ministry of Environmental Protection Bulletin 2018, No. 11 |
HJ 178-2018
Flue gas circulating fluidized bed flue gas desulfurization project
General technical specifications
General technical specification of circulating fluidized bed flue gas desulfurization
2018-1-15 released
2018-5-1 implementation
Ministry of Environmental Protection released
People's Republic of China national environmental protection standards
Directory
1 scope of application .1
2 Normative references .1
3 Terms and definitions .3
4 pollutants and pollution load .5
5 General Requirements
6 Process Design .6
7 major process equipment and materials .10
8 detection and process control .11
9 major auxiliary works .12
10 Occupational Safety and Occupational Health
11 construction and acceptance 13
12 Operation and Maintenance 14
Appendix A (Informative) Absorbent, water quality requirements
Appendix B (informative) desulfurization project operation and maintenance management .17
Foreword
In order to carry out "Law of the People's Republic of China on Environmental Protection", "Law of the People's Republic of China on Prevention and Control of Atmospheric Pollution" and other laws and regulations, prevention and control ring
Pollution, improve the quality of the environment, regulate the flue gas circulating fluidized bed flue gas desulfurization project construction and operation management, the development of this standard.
This standard specifies the flue gas circulating fluidized bed flue gas desulfurization project design, construction, acceptance, operation and maintenance of technical requirements.
This standard was first released in.2005, this is the first revision.
The main content of this revision.
- Expand the scope of the applicable industries;
- Perfecting and supplementing the general technical requirements applicable to various industries, eliminating the special technical requirements applicable only to the thermal power industry;
- According to the technical development, the technical contents of flue gas system and absorption system were mainly adjusted, which supplemented the equipment selection requirements;
- According to the requirements of integration of desulphurization and dust removal, add the content of design selection specification of dust remover;
- Enrich the operation and maintenance of technical content;
- Improve the information appendix.
This standard Ministry of Environmental Protection Science and Technology Standards Division revised.
This standard is mainly drafted by. China Environmental Protection Industry Association, Fujian Long net Environmental Protection Co., Ltd., Wuhan Kaidi Electric Power Co., Ltd.
Limited company, Beijing Institute of Labor Protection.
This standard MEP.2018 January 15 approved.
This standard since May 1,.2018 implementation.
This standard is interpreted by the MEP.
General technical specifications for flue gas desulfurization by flue gas circulating fluidized bed method
1 scope of application
This standard specifies the flue gas circulating fluidized bed flue gas desulfurization project design, construction, acceptance, operation and maintenance of technical requirements.
This standard applies to flue gas circulating fluidized bed flue gas desulfurization project can be used as construction project environmental impact assessment, environmental protection facilities
Technical basis for calculation, construction, acceptance and operation management.
The technical requirements proposed by this standard are general and special requirements to implement the relevant technical specifications of the industry.
2 Normative references
This standard references the following documents in the terms. For undated references, the effective version applies to this standard.
GB 150 pressure vessel
GB 912 carbon structural steel and low alloy structural steel hot rolled steel sheet and strip
GB 2894 safety signs
GB 4053 fixed steel ladders and platform safety requirements
GB/T 4272 equipment and pipe insulation technology
GB 5083 General safety and health design of production equipment
GB/T 5750 drinking water health standards test methods
GB/T 6719 bag filter technical requirements
GB/T 6920 Determination of water quality - Glass electrode method
GB/T 7477 Water quality - Determination of total calcium and EDTA - EDTA titration method
Water quality - Determination of ammonium - Distillation and titration
Water quality - Determination of chloride - Silver nitrate titration
Water quality - Determination of sulfate - Gravimetric method
GB 12348 industrial enterprises boundary environmental noise emission standards
GB/T 12801 production safety and health requirements General
GB 18599 general industrial solid waste storage, disposal site pollution control standards
GB/T 19229.2 coal-fired flue gas desulfurization equipment Part 2. coal-fired flue gas dry/semi-dry desulfurization equipment
GB/T 19587 gas adsorption BET method for the determination of solid material specific surface area
GB/T 27869 electric bag composite dust collector
GB 50009 Building structural load specifications
GB 50010 Design code for concrete structures
GB 50011 Code for seismic design of buildings
GB 50013 outdoor water supply design specifications
GB 50014 outdoor drainage design specifications
GB 50016 architectural design code for fire protection
GB 50017 steel structure design specifications
GB 50019 Heating, ventilation and air conditioning design specifications
GB 50029 compressed air station design specifications
GB 50033 architectural lighting design standards
GB 50034 industrial lighting design standards
GB 50040 Power Machinery Basic Design Specification
GB 50052 for power distribution system design specifications
GB 50084 automatic sprinkler system design specifications
GB 50087 Industrial Enterprise Noise Control Design Code
GB 50093 Automatic Instrumentation Engineering Construction and Quality Acceptance Specification
GB 50116 automatic fire alarm system design specifications
GB 50187 General design of industrial enterprises
Seismic Design Code GB 50191 Structure
GB 50222 interior design fire protection specifications
GB 50231 Mechanical Equipment Installation Engineering Construction and Acceptance Common Specifications
GB 50254 Installation of electrical installations low voltage electrical construction and acceptance specifications
Specification for Construction and Acceptance of Electrical Lighting Fixtures for Installation of Electrical Installations
GB 50300 construction quality acceptance uniform standards
GB/T 50655 chemical plant steam system design specifications
GB 50755 Steel Construction Project Code
Design Code for Roads and Mines
Code for Design of Extinguishing Fire Extinguisher GB J 140
GBZ 1 industrial design health standards
GBZ 2.1 Occupational exposure limits for hazardous agents in the workplace - Part 1. Chemical hazards
GBZ 2.2 Occupational exposure limits for hazardous agents in the workplace - Part 2. Physical factors
DL/T 323 Dry Flue Gas Desulfurization Lime for Determination of Activity
DL/T 5044 Power Engineering DC system design technical specifications
DL/T 5072 thermal power plant insulation paint design specifications
DL/T 5121 thermal power plant smoke coal gas pipeline design technical specifications
DL/T 5403 thermal power plant flue gas desulfurization project to adjust the trial transport and quality acceptance assessment procedures
HJ/T 75 fixed pollution sources flue gas emissions continuous monitoring technical specifications
HJ/T 76 fixed pollution source flue gas emissions continuous monitoring system technical requirements and testing methods
HJ/T 325 Environmental Protection Products Technical Requirements Bag filter bag frame
HJ/T 327 Environmental Protection Products Technical Requirements Bag filter bags
HJ 2028 electrostatic precipitator engineering general technical specifications
Technical Specification for Operation and Management of HJ 2040 Thermal Power Plant Flue Gas Treatment Facilities
JB/T 4735 steel welded pressure vessel
JB/T 8470 positive pressure dense phase fly ash pneumatic conveying system
JB/T 8532 pulse jet bag filter
JB/T 10191 bag filter safety requirements Pulsed jet bag filter with a sub-air box
JB/T 11076 desulfurization with a dry dry lime digester
JB/T 11646 semi-dry desulfurization equipment dedicated equipment fluidization tank
JB/T 12116 desulfurization and denitration with high-pressure reflux water spray gun
JC/T 478.1 Building lime test methods - Part 1. Physical test methods
JC/T 478.2 Building lime test methods - Part 2. Chemical analysis methods
Air transport chutes for the cement industry
3 Terms and definitions
3.1 flue gas circulating fluidized bed desulfurization process circulating fluidised bed flue gas desulphurization
Refers to the use of circulating fluidized bed working principle, the absorbent containing material in the absorption tower to form a fluidized bed cycle, complete absorption
Agents and flue gas SO2 and other acid gases (including SO3, HCl, HF, NO2, etc.) reaction to achieve purifying flue gas desulfurization process.
3.2 desulfurization project desulphurization project
Refers to the facilities, equipment, components and system integration required to remove the SO2 and other sour gases from the flue gas through the absorbent.
3.3 absorbent absorbent
Refers to the chemical reaction to remove SO2 and other acid gases and other substances, usually calcium-based absorbent.
3.4 absorber absorber
Refers to the formation of circulating fluidized bed desulfurization project SO2 and other acid gases and other harmful substances in the reaction device.
3.5 By-product
Refers to the absorbent and the flue gas SO2 and other acidic gases generated after the reaction of substances.
3.6 desulfurization efficiency desulfurization efficiency
Refers to the amount of SO2 removed by the desulfurization project and the amount of SO2 contained in the flue gas without desulfurization, calculated according to formula (1)
Desulfurization efficiency = (C1-C2)/C1 × 100% (1)
Where.
C1 - the concentration of SO2 in the flue gas before desulfurization;
C2 - desulfurization flue gas SO2 conversion concentration.
3.7 equivalent molar ratio stoichiometric molar ratio
Refers to the consumption of absorbent equivalent mole number and removal of sulfur dioxide (S), sulfur trioxide sulfur (S), hydrogen chloride in chlorine (Cl),
The ratio of the equivalent molar equivalents of fluorine (F) and nitrogen (N) in nitrogen dioxide to hydrogen fluoride. Calcium-based absorbent equivalent molar ratio according to equation (2)
Count.
0.5 0.5 0.5
()
SO SO HCl HF NO
Ca OH
MMMMM
(2)
Where.
M - equivalent molar ratio;
Ca (OH) 2 M - molar amount of Ca (OH) 2 equivalent in absorbent consumed, mol;
SO 2 M - number of moles of SO 2 equivalents removed, mol;
SO3 M - number of moles of SO3 equivalents removed, mol;
HCl M - number of moles of HCI removed, mol;
HF M - moles of HF equivalents removed, mol.
NO2 M - mole number of NO2 equivalents removed, mol.
3.8 Particles particle
Refers to the total suspended particulate matter in the flue gas.
3.9 Pre-collector pre-collector
Means disposed upstream of the absorption tower, for the capture of particulate matter in flue gas equipment.
3.10 Desulfurization precipitator collector for desulfurization equipment
Refers to the desulfurization project for the removal of flue gas circulating fluidized bed flue gas desulfurization of particulate matter equipment.
3.11 lime digester hydrator
Refers to the quick lime powder (CaO) with the right amount of water to produce hydrated lime powder (Ca (OH) 2) equipment.
3.12 empty tower pressure drop empty bed pressure loss
Refers to the absorber does not vote material, only the flue gas through the absorption tower, absorption tower inlet and outlet flue gas static pressure difference.
3.13 bed pressure drop
Refers to the material in the absorption tower to form a fluidized bed pressure drop.
3.14 Absorption tower pressure drop total pressure loss
Refers to the absorption tower material to form a fluidized bed body, through the absorption tower inlet and outlet flue gas static pressure difference, that is, empty tower pressure drop and bed pressure drop
Sum.
4 pollutants and pollution load
4.1 Absorption tower inlet flue gas conditions
a) General industry single-stage tower flue gas treatment SO2 concentration (dry basis) should not be higher than 3000mg/m3, sinter industry single-stage tower treatment
Flue gas SO2 concentration (dry basis conversion) should not be higher than 4500mg/m3;
b) single tower flue gas treatment should not be higher than 1.5 million m3/h (dry basis);
c) inlet flue gas temperature should be 90 ℃ ~ 260 ℃.
4.2 flue gas circulating fluidized bed desulfurization main application areas include. power generation boilers, industrial boilers, incinerators and sintering/pellet, reminder
Cracking, coking, carbon, carbon black, glass and other furnaces.
4.3 Design of Desulfurization Project for New Project The flue gas design parameters such as flue gas quantity and SO2 concentration should adopt the data under the maximum continuous working condition;
Design of desulfurization project of the project The design parameters of flue gas such as flue gas amount and SO2 concentration should be based on the measured value and fully consider the trend of change
Determine, or through analogy with similar projects to determine.
4.4 should be based on engineering design needs to collect the physical and chemical properties of flue gas and other raw materials, including the following.
a) the amount of flue gas (normal, maximum, minimum);
b) flue gas temperature and range (normal, maximum, minimum and dew point temperature);
c) gas composition and concentration in flue gas (SO2, NOx, O2, NH3, SO3, HCl, HF, etc);
d) smoke particulate matter concentration and composition;
e) flue gas pressure, moisture content;
f) Equipment and working system for generating pollutants.
5 general requirements
5.1 General Provisions
5.1.1 The flue gas desulfurization project of the new project should be designed, constructed and put into operation simultaneously with the main project.
5.1.2 desulfurization project layout should be consistent with the factory master plan. Design documents should be submitted according to the content and depth of approval, approval and filing.
Desulfurization project construction should be the national project construction procedures.
5.1.3 SO2 emission concentration desulfurization project should meet the national and local emission standards.
5.1.4 desulfurization project design should take full account of fuel, raw materials and the main project load changes to improve the desulfurization process system adaptability and
Adjustable.
5.1.5 desulfurization project required water, electricity, gas, steam and other auxiliary media should be provided by the main project. Absorbents and byproducts should be provided
Volume device, but also with the main project share.
5.1.6 Desulfurization project design, construction and operation, should take effective noise, noise reduction, greening and other noise reduction measures, noise and vibration control
The design should be consistent with the provisions of GB 50087 and GB 50040, factory noise should meet the requirements of GB 12348.
5.1.7 desulfurization by-products should be considered comprehensive utilization. No comprehensive utilization of conditions, the storage, storage and other construction and use should be consistent
GB 18599 provisions.
5.1.8 Desulfurization project The automatic continuous monitoring system (CEMS) set up and operation should be consistent with the provisions of HJ/T 75, HJ/T 76 and
Local environmental protection department's requirements.
5.1.9 desulfurization project design, construction and operation and maintenance should be consistent with national and industry quality, safety, health, fire and other laws and regulations
And the standard rules.
5.2 Engineering composition
5.2.1 flue gas circulating fluidized bed flue gas desulfurization project including process systems, ancillary systems.
5.2.2 The process system includes flue gas system, absorbent preparation and supply system, pre-dedusting system (optional), absorption system, desulfurization and dedusting system
System, ash cycle system, process water system, by-product system, compressed air system, heating system.
5.2.3 Auxiliary systems include electrical systems, construction and structures, water supply and drainage, fire alarm and fire fighting systems, heating ventilation and air conditioning,
Roads and greenery.
5.3 General layout
5.3.1 desulfurization project layout should be consistent with GB 50187, GB 50016 and the corresponding industry standard requirements.
5.3.2 The general layout of desulfurization project should follow the following principles.
a) process layout is reasonable, short flue gas;
b) convenient transportation;
c) facilitate the construction, is conducive to maintenance and repair;
d) rational use of topography and geological conditions;
e) make full use of the public facilities in the factory;
f) land conservation and intensive, small amount of work, low operating costs;
g) Compliance with environmental protection, fire protection, occupational safety and occupational health requirements.
5.3.3 desulfurization project should be arranged in the vicinity of the chimney, depending on the actual plant conditions can be adjusted.
5.3.4 Absorbent discharge and storage sites, by-product storage sites should be arranged on the leeward side of the perennial dominant wind direction. Raw lime warehouse, slaked lime
Warehouse (or carbide slag warehouse), byproduct library should be concentrated in the vicinity of the absorption tower.
5.3.5 Desulfurization The design of the road in the project shall meet the requirements of GB J 22 and shall be in accordance with the road design of the main project in the plant.
5.3.6 Desulfurization site drainage should be unified with the main project.
6 process design
6.1 General Provisions
6.1.1 desulfurization process design should be mature and reliable, safe and stable operation, technical and economical technology, should meet the environmental management
Requirements of the premise, give full consideration to long-term operation of desulfurization project reliability and stability.
6.1.2 desulfurization process parameters should be based on emission requirements, flue gas characteristics, operating requirements, fuel/raw material quality, absorbent supply, water quality
And other factors, determined by a comprehensive analysis and optimization.
6.1.3 According to the nature of flue gas, operating conditions, the amount of flue gas and the main project on the desulfurization project requirements, desulfurization project configuration options
A machine a tower, a multi-tower, a multi-tower machine.
6.1.4 desulfurization project design desulfurization efficiency should be based on national and local emission standards to determine the requirements.
6.1.5 desulfurization project should be set for the operation, testing, inspection, maintenance platform and escalator, and in line with the requirements of GB 4053.
6.2 process
Flue gas circulating fluidized bed desulfurization process shown in Figure 1.
Figure 1 flue gas circulating fluidized bed desulfurization process schematic
6.3 flue gas system
6.3.1 The flue gas system is generally composed of pre-dust collector (optional), absorption tower, desulfurization precipitator, induced draft fan, flue, clean flue gas recirculation system
System, baffle doors and other components.
6.3.2 desulfurization project should set up a clean flue gas recirculation system, used to supplement the main project at low load absorption tower fluidization required flue gas volume.
6.3.3 baffle door to prevent leakage, clean the flue gas recirculation system damper door should have good operability and regulatory.
6.3.4 Flue gas leakage rate of the system should be controlled below 5%.
6.3.5 flue gas system should be set according to relevant test test holes, manholes and the corresponding maintenance platform.
6.3.6 flue design can refer to the requirements of DL/T 5121, and consider insulation, with heat measures.
6.4 Absorbent preparation and supply system
6.4.1 Absorbent selection should be based on the source of absorbent, transport conditions, one-time investment and operating costs and other technical and economic comparison
OK, can be directly used hydrated lime, carbide slag or on-site quicklime digestion. When using carbide slag, it is advisable to use dry powder carbide slag;
Carbonic residue on the activity should take measures to restore activity. Absorbent quality requirements in Appendix A.
6.4.2 absorbent bunker should meet the following requirements.
a) The effective volume of the absorber tank should be based on the supply and transport of the absorbent. Live lime digestion as hydrated lime as a suction
Receiving agent, the effective storage capacity of raw silo should meet the design conditions of 2d ~ 4d of lime consumption; slaked ash storage silo effective amount should
Meet the design conditions 1d ~ 2d of slaked lime consumption. Direct use of hydrated lime, carbide slag as an absorbent, the effective storage bin absorbent
Powder should meet the design conditions 2d ~ 5d of slaked lime (carbide slag) consumption.
b) The absorber tank should be sealed, the inner surface should be smooth and flat; the inner wall cone hopper should be set to gasification plate, in order to avoid clogging the feeding system.
c) absorbent bin flow fan can be shared, can also be set separately; fluidized air volume should be based on the layout of the gasification plate to determine the area; fluid wind
Should be set aside.
d) The dedusting device should be installed on the top of absorbent bin, and a deflation pipe should be installed. Trachea through the atmosphere should be set dust removal device; dust removal device
Exhaust fan should be configured to keep the warehouse slightly negative pressure. Absorbent warehouse should be the top of the vacuum relief valve to maintain the pressure balance within the warehouse.
e) absorbent warehouse should be protected from moisture, the outer wall of the metal warehouse should take insulation measures.
6.4.3 Lime digester output should not be less than 150% of lime consumption under design conditions.
6.4.4 Absorbent should be transported by air chute or pneumatic conveying mode, should be set to add two metering devices; added to the device out
Power should be designed according to 150% of lime consumption under design conditions.
6.5 pre-dust removal system
6.5.1 The original flue gas entering the desulfurization project is not carrying effective absorbent and the supporting flue gas desulfurization project inlet particulate matter concentration higher than 10g/m3
When, should set the pre-precipitator; into the desulfurization project of the original flue gas carrying effective absorbent, desulfurization project may not set the pre-precipitator.
6.5.2 pre-dust collector should adopt electrostatic precipitator.
6.6 Absorption system
6.6.1 Absorption system is mainly composed of absorption tower inlet and uniform airflow device, airflow acceleration spoiler, reaction section and exit section,
Set bottom purge and accident ash removal device.
6.6.2 Absorption tower capacity should be designed according to the amount of flue gas design; set of absorption tower for each desulfurization project should be based on the amount of gas to determine.
6.6.3 Absorption tower inlet flue gas temperature should be designed under the conditions of smoke temperature plus 10 ℃ margin design; absorption tower outlet temperature should be higher than the dew point temperature
10 ℃ above.
6.6.4 absorber pressure drop should be designed to 1600Pa ~ 2200Pa, bed pressure drop design should be 600Pa ~ 1400Pa.
6.6.5 absorption tower flue gas residence time should be greater than 4s.
6.6.6 Absorption tower straight pipe design flow should be 3m/s ~ 6.5m/s.
6.6.7 Absorption tower internal should not be set within the rod.
6.7 Desulfurization dust removal system
6.7.1 desulfurization dust collector design should be consistent with the provisions of GB/T 19229.2, bag filter, electric bag composite dust collector. If required
Desulfurization precipitator outlet particulate matter concentration below 30mg/m3, bag filter filter speed should not exceed 0.8m/min; if desulfurization dust
Particle outlet concentration of less than 10mg/m3, bag filter filter speed should not exceed 0.7m/min.
6.7.2 Desulfurization prec......
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