HJ 2046-2014_English: PDF (HJ2046-2014)
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Technical specification for seawater flue gas desulfrization project of thermal power plant
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HJ 2046-2014
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| Standard ID | HJ 2046-2014 (HJ2046-2014) | | Description (Translated English) | Technical specification for seawater flue gas desulfrization project of thermal power plant | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z25 | | Classification of International Standard | 13.040.40 | | Word Count Estimation | 20,278 | | Date of Issue | 2014/12/19 | | Date of Implementation | 2015/3/1 | | Quoted Standard | GB 3097; GB 12348; GB 12801; GB 13223; GB/T 19229.3; GB 50016; GB/T 50033; GB 50040; GB 50046; GB 50069; GB/T 50087; GB 50140; GB 50222; GB 50229; GB 50243; GB 50660; GBJ 22; GBZ 1; DL 5009.1; DL/T 5029; DL/T 5035; DL/T 5044; DL 5053; DL/T 5136; DL/T 5153 | | Drafting Organization | Beijing Longyuan Environmental Engineering Co., Ltd. | | Administrative Organization | Ministry of Environment Protection | | Regulation (derived from) | Ministry of Environmental Protection announcement 2014 No. 84 | | Issuing agency(ies) | Ministry of Environmental Protection | | Summary | This Standard specifies the seawater thermal power plant flue gas desulfurization project design, engineering brigade, acceptance, operation and maintenance and other technical requirements. This Standard applies to Penang at sea a unit capacity of 300 MW |
HJ 2046-2014
Technical specification for seawater flue gas desulfrization project of thermal power plant
People's Republic of China National Environmental Protection Standards
Thermal power plant flue gas desulfurization project technical specification
Seawater law
Technical specification for seawater flue gas desulfurization project of
thermal power plant
(release
draft)
Issued on.2014-12-19
2015-03-01 implementation
Issued by the Ministry of Environmental Protection
Table of Contents
Preface ..II
1. Scope ..1
2 Normative references ..1
3 Terms and definitions .2
4. Pollutants and pollution load .. 3
5 general requirements .. 3
6 ..4 Process Design
7 process equipment and materials ..7
8 ..8 detection and process control
9 9 mainly aided engineering
10 labor safety and occupational health ..13
11 construction and acceptance .14
12 Operation and Maintenance 14
Appendix A ..17
Foreword
For the implementation of the "People's Republic of China Environmental Protection Law", "People's Republic of China Air Pollution Prevention Law" and "Power Plant
Air pollutant emission standards "to regulate the seawater thermal power plant flue gas desulfurization project construction, to reduce sulfur dioxide emissions from thermal power plants, improve the environment
Quality, protection of human health, the development of this standard.
This standard specifies the seawater thermal power plant flue gas desulfurization project design, construction and installation, commissioning, operation and management of technical requirements and acceptance.
This standard is a guiding standard.
This standard is the first release.
This standard is developed by the Ministry of Environmental Protection Science, Technology organization.
Drafting of this standard. Beijing Longyuan Environmental Engineering Co., Ltd., China Environmental Science Society.
The Ministry of Environmental Protection Standards December 19, 2014 for approval.
This standard since March 1, 2015 implementation.
This standard by the Ministry of Environmental Protection is responsible for interpretation.
Thermal power plant flue gas desulfurization project technical specification seawater Method
1 Scope
This standard specifies the seawater thermal power plant flue gas desulfurization project design, construction, inspection, operation and maintenance and other technical requirements.
This standard applies to coastal a unit capacity of 300 MW and above Thermal Power Plant seawater flue gas desulfurization project, 300 MW thermal power less
It may refer to when seawater flue gas desulfurization unit. Its waters should have good diffusion ocean conditions.
2 Normative references
The following documents for the application of this standard is essential. For undated references, the effective version applies to this standard
quasi.
GB 3097 water quality standards
GB 12348 industrial enterprises of environmental noise emission standard plant boundary
GB 12801 General requirements for the production process safety and health
GB 13223 Thermal Power Plant Air Pollutant Emission Standards
GB/T 19229.3 Part III coal-fired flue gas desulphurization equipment. Seawater Flue Gas Desulfurization equipment
GB 50016 architectural design code for fire protection
GB/T 50033 architectural lighting design standards
GB 50040 dynamic machine foundation design specification
GB 50046 Code for anticorrosion design of industrial buildings
GB 50069 Water Supply and Drainage Structural design code
GB/T 50087 Industrial Enterprise Noise Control Design Specification
GB 50140 Building fire extinguishers configuration design specifications
GB 50222 interior decoration of buildings for fire protection design
GB 50229 fire protection design of power plant and substation
GB 50243 Construction Quality Acceptance of Ventilation and Air Conditioning Engineering
GB 50660 and medium-sized power plant design specifications
GB J 22 factories and road design specifications
GB Z 1 Design of Industrial Enterprises hygiene standards
DL 5009.1 power construction safety regulations (thermal power plant section)
DL/T 5029 power plant construction decoration design standards
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 5053 power plant labor safety and industrial hygiene regulations Design
DL/T 5136 power plant, substation secondary wiring design technical regulations
DL/T 5153 power plant auxiliary power design regulations
DL/T 5196 Technical specification for power plant flue gas desulfurization design
DL/T 5339 Hydraulic power plant design specifications
DL/T 5436 seawater thermal power plant flue gas desulfurization project commissioning adjustment and quality assessment procedures and acceptance
HJ/T 75 stationary sources Continuous Emission Monitoring Technical Specifications
HJ/T 76 stationary sources flue gas emissions continuous monitoring system technical requirements and test methods
HJ/T 179 thermal power plant flue gas desulfurization project technical specification limestone/lime - gypsum
HJ/T 255 Construction Project Environmental Protection acceptance for power plant
"Project (Project) final acceptance approach" (Total construction [1990] No. 1215)
"Acceptance of completed construction projects management approach" (SEPA Order No. 13)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1 Seawater FGD seawater flue gas desulfurization
Using seawater as a wet flue gas desulfurization absorber, the present standard of the process does not add other chemicals.
3.2 absorbent absorbent
Desulfurization process for removing sulfur dioxide reactants (SO2) and other harmful substances. Absorbent seawater desulfurization process is used
Seawater, usually from the coastal thermal power condenser circulating cooling water.
3.3 absorber absorber
Desulfurization reaction apparatus removing SO2 and other harmful substances.
3.4 Seawater recovery system seawater recovery system
Seawater after desulfurization were, aeration and other methods to make the final discharge water quality is restored to meet the relevant quality requirements of the system.
Generally include aeration tank, aeration blowers and aeration and the like.
3.5 aeration tank aeration basin
Utilization and aeration methods such as seawater desulfurization of water quality recovery processing building structures.
3.6 flue gas cooling system accident emergency quench water system
When the temperature in the boiler flue gas desulfurization equipment accident conditions exceed the design inlet temperature of flue gas, desulfurization system equipment and to protect the wood preservative
Safe operation of the flue gas material provided emergency cooling equipment and systems.
4. Pollutants and pollution load
The amount of flue gas desulfurization equipment 4.1 flue gas inlet, SO2 content can be calculated according to the provisions of HJ/T 179's.
4.2 smoke constituents other contaminants (such as hydrogen chloride (HCl), hydrogen fluoride (HF), sulfur trioxide (of SO3)) should be based on the design data of the fuel
Material analysis data calculated or measured data is determined.
4.3 system design desulfurization efficiency seawater flue gas desulfurization devices shall meet local thermal power plant SO2 emission limits and total control. Take off
Efficiency of sulfur by HJ/T 179 is calculated.
5 general requirements
5.1 General provisions
5.1.1 new construction, renovation, expansion of the FGD plant should be the main project and thermal power plants or heating boiler at the same time design, construction, and
Put into use.
5.1.2 absorber design life of new generating units shall not be less than 30 years, the absorber design life of not less than existing turbines
Generator set life.
5.1.3 seawater FGD boilers, coal-fired its average sulfur content (as received) should be not more than 1%. When the unit has both cooling sea
When water does not meet the needs of the desulfurization process, the water should be added to the amount inadequate. Supplemented seawater through technical and economic measures should be integrated more reasonable after
determine.
5.1.4 flue gas inlet dust concentration of seawater FGD unit should not exceed 30 mg/Nm3.
5.1.5 desulfurization equipment design, construction should be consistent with GB 50660, DL/T 5196 and other relevant requirements of standards and regulations, and to ensure that its exhaust fumes
Put in line with GB 13223 standards or local requirements.
Water quality efflux 5.1.6 seawater flue gas desulfurization apparatus treatment should be in accordance with the approved emission waters offshore environmental function zoning,
Marine function zoning requirements for the implementation of GB 3097.
Measures to reduce noise 5.1.7 desulfurization island design, construction, should take effective sound insulation, noise reduction, greening, noise and vibration control
Design should comply with GB/T 50087 and GB 50040, and the plant boundary noise should reach GB 12348 requirements.
5.1.8 seawater FGD project shall take the necessary measures to ensure that waste gas, solid waste, treatment and disposal of heavy metals were in line with
Requirements and corresponding standards EIA approval document.
5.1.9 flue gas desulfurization project, shall comply with this standard, it should also comply with the relevant national project quality, safety, health, fire and other parties
From mandatory standard provisions surfaces.
5.2 General layout
Total plane 5.2.1 seawater FGD equipment shall be arranged in line with GB/T 19229.3, DL/T 5196, HJ/T 179 requirements.
5.2.1 General Plan should be combined with seawater desulfurization process and site conditions are arranged according to local conditions, and can be divided into the absorber region and the aeration tank area
area.
5.2.2 absorber area should be arranged in the vicinity of the chimney, which built structures in accordance with the process to determine the general arranged absorber, the flue support
Planes, flue gas heat exchanger (if any) support, booster fan (if any) between the foundation and maintenance support, electrical control building, CEMS and small; aeration
Pool area should be arranged in the vicinity of the circulating water drains, which is also building structures according to the process to determine the general arrangement of seawater booster pumping station,
Aeration fan room, aeration tank, sampling devices and the like; as far away from the two regions, may be disposed between the aeration fan local control room equipment.
6 Process Design
6.1 Process
6.1.1 seawater FGD equipment shall seawater supply systems, flue gas systems, sulfur dioxide absorption system and sea water recovery system and other components.
Typical seawater FGD process shown in Figure 1.
6.1.2 boiler flue gas desulphurization booster fan (if any) boost, the flue gas heat exchanger (if any) after cooling into the absorber by sea water
Remove droplets carried by flue gas heat exchanger and then through a demister at the top of the flue gas desulfurization scrubber absorber settings (if any) to heat up, the most
After discharge from the chimney.
6.1.3 desulfurization absorber drain into waterways recovery system aeration tank, and the water from the unit through the condenser outlet blending and aeration
Treatment, etc., to restore water quality standards after discharging into the sea.
6.1.4 The total demand seawater seawater seawater desulfurization apparatus comprising an absorption tower and the amount of supply aeration tank.
Figure 1 Typical seawater FGD process schematic
Aeration
Fan
Original flue booster
Fan
Aeration tank
GGH
seawater
Booster pump
Cooling water accident
air
Drain back into the sea waters
(Condensate from unit
Steam outlet seawater)
Gas
Heat
Cooling water accident
6.2 desulfurization apparatus main process systems
6.2.1 seawater supply system
6.2.1.1 seawater supply system including sea water booster pump and piping and valves; absorber should adopt the unit system of water supply system.
6.2.1.2 In addition to the water outlet of the booster pump water supply line, the seawater supply line should be used by gravity, should not affect the unit circuit water
The safe operation of the system.
6.2.1.3 booster pump seawater number should be determined according to the number of the absorber, type and operational reliability. Seawater booster pump should pump equipment.
6.2.1.4 boost seawater pump house should be designed to meet the DL/T 5339 related requirements; sea water booster pump should be set up before the pool, and should be in the water
Before the entrance to the pool filter settings.
6.2.1.5 Seawater booster pump should be located at the outlet of water hammer action.
6.2.1.6 Seawater booster pump material flow components should be able to meet the operational requirements seawater corrosion environment.
6.2.1.7 seawater piping design should take full account of the working medium of the pipeline system corrosion and wear. Seawater pipeline should be buried cladding mode
Set. The flow rate of the pipeline media selection by DL/T 5339 OK.
6.2.1.8 seawater supply line valve should be selected on the butterfly valve flow through the pipe diameter should be consistent. Should be used between the valve and the pipe
Flange connection.
6.2.1.9 should be set on the absorber pipe emptying water supply measures, each 50 m ~ 100 m should set the manhole.
Strainer or filter should be set on the sea 6.2.1.10 booster pump outlet water pipes.
6.2.2 Flue system
6.2.2.1 desulfurization booster fan and induced draft fan should merge settings. When not possible, set up a separate booster fan.
6.2.2.2 desulfurization booster fan should consider the following requirements.
a) desulfurization booster fan axial fan should be chosen.
b) the type and quantity of booster fan with the unit should lead the same fan.
c) When multiple units combined with an absorption tower should be determined according to the number of fans after technical and economic comparison.
d) Basic air volume booster fan according to the amount of flue gas absorption tower design conditions to consider. Air volume margin desulfurization booster fan is not less than
10%, plus a margin of not less than a temperature of 10 ℃ ~ 15 ℃ of. Desulfurization booster fan pressure head substantially desulfurization apparatus itself resistance
And desulfurization equipment and the import and export of pressure, outlet pressure by the body responsible for the design unit. Head Margin of not less than 20%.
e) When the booster fan running in parallel, each of the booster fan, the inlet should be set bezel door.
6.2.2.3 approval of advice should determine whether to set the flue gas heat exchanger according to the construction project environmental impact assessment document.
6.2.2.4 flue gas heat exchanger heating surface should be taken to prevent low temperature corrosion, wear, anti-blocking, anti-fouling and other measures.
6.2.2.5 flue gas heat exchanger heating surface should have good cleaning and washing measures, and should strengthen the maintenance and management of the operation.
6.2.2.6 flue gas systems should be designed with reference to corrosion HJ/T 179 executed.
6.2.2.8 flue gas desulfurization equipment original design temperature should be used when the boiler maximum continuous operating mode (BMCR) under the burning fuel from the host flue design
Into the desulfurization device interface at runtime flue gas temperature plus 15 ℃, short-term operating temperature can increase 50 ℃.
6.2.2.9 flue gas cooling system accident
a) Select the water cooling system flue gas accident should be combined with the required cooling water flow and water supply capacity to determine the general should adopt electric
Industrial water plant.
b) shall be subject to the flue gas accident cooling water spray nozzle fully join the flue after.
c) the position of the flue gas cooling water spray cooling system accident should be set at the time of the induced draft fan or booster fan (no booster fan) and flue gas exchange
Flue (without flue gas heat exchanger) between the heat or absorber, and left to ensure that the flue gas atomized cooling water is evaporated to dryness required
Correspondence between the flue length.
d) flue gas accident cooling system should be set up cooling water buffer tank. Installation height should meet the buffer tank nozzle spray atomization of the indenter
Requirements, water tank capacity should meet at least 2 to 5 minutes of consumption of water. Fill the buffer tank should be equipped with water pumps and other measures complement
Pumps should use a reliable power supply.
e) When the water pressure to meet the water and reliable water nozzle pressure, water can also be a direct water supply.
f) The use of direct water supply pump, the pump head should meet the requirements of the pressure nozzle. Reliable power supply for the pump should be used.
6.2.3 sulfur dioxide absorption system
6.2.3.1 sulfur dioxide absorption system equipment includes absorption tower and its internal parts. Absorber should be based on the number of boiler capacity, desulphurization installation
Determined set reliability requirements, water supply conditions. 300 MW or more units should be equipped with a furnace a tower; 200 MW and two units under appropriate
Furnace with a tower. Seawater desulfurization process can be packed tower, spray tower or other tower, using a gas-liquid countercurrent.
6.2.3.2 absorption column body can make concrete or steel structure, anti-corrosion measures should be taken to the inner wall of the tower. Tower equipment should be able fit
It should tower temperature and corrosion requirements.
6.2.3.3 When the spray tower, the number of spray levels should be based on the amount of flue gas desulfurization, flue gas SO2 concentration, desulfurization efficiency, water quality and
Factors such as temperature setting, should not be less than three.
6.2.3.4 absorber should be installed defogger. Normal operating conditions, the flue gas outlet mist droplet concentration should not exceed 75 mg/Nm3.
6.2.3.5 absorber should be provided with sufficient number and size of Manhole, repair and maintenance in order to meet the requirements.
6.2.3.6 absorber evacuation measures should be set after the bottom of the outage.
6.2.3.7 absorber drainage point should be set to manual sampling points.
6.2.3.8 absorber should be set up outside for repair and maintenance of platforms and escalators, platform design load of not less than 4 kN/m2, the width of the platform is not small
To 1.2 m; tower should be provided with fixed maintenance platform.
6.2.4 Seawater recovery system
6.2.4.1 sea recovery aeration tank should be based on the number of absorber configuration, aeration tank inlet sea water allocation requirements, water supply conditions,
Maintenance and reliability requirements determined. 300 MW and above units should adopt a furnace with an aeration tank.
6.2.4.2 sea recovery systems process design and equipment selection should also meet the emissions of chemical oxygen demand in the water (COD), pH value
And dissolved oxygen (DO) requirements. Aeration treatment should be preceded by the acidic seawater from the absorber is diluted to a pH of 5 or more.
Size 6.2.4.3 aeration tanks effective aeration area should be based on the inlet flue gas desulfurization equipment parameters desulfurization efficiency, water quality conditions, sea
Water effluent quality requirements and other factors to determine the ambient temperature, should have good operating economy.
6.2.4.4 aeration tank level should be based on the design tide level at the outlet of the circulating water drain (not less than 10% of the high tide level requirements) and the sea
Determine resistance and other water drainage canals factors. Running tidal seawater changes should not affect the aeration tank, aeration tank should prevent high tide
Marine spill measures.
6.2.4.5 Aeration fan selection should be sized according to the aeration tank design level. Fan type centrifugal fan should be adopted, when the conditions are right
Roots blower may choose, do not use the equipment, no less than two.
Setting 6.2.4.6 aeration system as a whole should have the energy saving, the composition is simple, easy installation and maintenance management, easy to row
In addition to failure and so on.
6.2.4.7 aerator should be used in a uniform gas distribution, the resistance is small, easy to plug, corrosion-resistant, easy operation and maintenance, long life type.
Seawater pool emptying and maintenance measures 6.2.4.8 aeration tank should be designed.
6.2.4.9 aeration tank body should adopt the reinforced concrete structure. Aeration tanks to sea water aeration areas should be protected against rot; aeration tank
In all exposure to salt spray and water gas equipment, pipelines, platforms and escalators holder should have a salt spray corrosion prevention measures; should be easy to avoid
Equipment and facilities corroded arranged near the aeration tank.
6.2.4.10 aeration tank area should have good noise control measures.
7 process equipment and materials
7.1 General provisions
Select the 7.1.1 process equipment and materials should be based on economic, applicable, to meet specific process requirements desulfurization unit, can choose a long-running
Reliability and long service life of equipment and materials.
Selection and Performance 7.1.2 The main process equipment requirements, see Chapter 6 of this standard.
7.1.3 Materials should be selected in the thermal power plant commonly used material.
7.......
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