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HJ 179-2018: General technical specification of flue gas limestone/lime-gypsum wet desulfurization HJ 179: Evolution and historical versions
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General technical specification of flue gas limestone/lime-gypsum wet desulfurization
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Basic data | Standard ID | HJ 179-2018 (HJ179-2018) | | Description (Translated English) | General technical specification of flue gas limestone/lime-gypsum wet desulfurization | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | F20 | | Word Count Estimation | 34,312 | | Date of Issue | 2018-01-15 | | Date of Implementation | 2018-05-01 | | Older Standard (superseded by this standard) | HJ/T 179-2005 | | Regulation (derived from) | Ministry of Environmental Protection Bulletin 2018, No. 11 | | Issuing agency(ies) | Ministry of Ecology and Environment | HJ 179-2018: General technical specification of flue gas limestone/lime-gypsum wet desulfurization
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People's Republic of China national environmental protection standards
Limestone/lime - gypsum wet flue gas desulfurization
General engineering specifications
General technical specification of flue gas limestone/lime-gypsum wet desulfurization
2018-1-15 released
2018-5-1 implementation
Ministry of Environmental Protection released
Directory
Foreword 1
1 scope of application .2
2 Normative references .2
3 Terms and definitions .3
4 pollutants and pollution load .5
5 General Requirements
6 Process Design .7
7 major process equipment and materials .11
8 Detection and Process Control 13
9 Main Auxiliary Engineering .14
Work Safety and Occupational Health .15
11 construction and acceptance 16
12 Operation and Maintenance 17
Appendix A (informative) routine analysis of test items and test cycles
Appendix B (informative) building (structure) building gravity load representative value calculation 20
Appendix C (informative) Winter heating indoor calculation temperature
Appendix D (informative) Limestone/lime-gypsum wet flue gas desulfurization project operating records.22
Appendix E (informative) maintenance of major equipment and quality requirements
Foreword
In order to carry out the Law of the People's Republic of China on Environmental Protection and the Law of the People's Republic of China on Prevention and Control of Atmospheric Pollution
Regulation, Prevention and Control of Environmental Pollution, Improvement of Environmental Quality, Regulation of Construction and Transportation of Limestone/Lime-Gypsum Wet Flue Gas Desulfurization Project
Line management, the development of this standard.
This standard specifies the limestone/lime - gypsum wet 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;
- Enrich the operation and maintenance of technical content;
- Improve the information appendix.
This standard Ministry of Environmental Protection Science and Technology Standards Division revised.
The main drafters of this standard. China Environmental Protection Industry Association, China Huadian Science and Industry Group Co., Ltd., Beijing
Electric Longyuan Environmental Engineering Co., Ltd., Datang Environmental Industry Group Co., Ltd., State Power Investment Group Yuanda Environmental Engineering
Co., Ltd., State Power Environmental Protection Research Institute, Beijing Institute of Labor Protection, Zhejiang Dingcheng Environmental Technology Co., Ltd.
Division, Beijing Lide Heng Environmental Engineering Co., Ltd..
This standard MEP.2018 January 15 approved.
This standard since May 1,.2018 implementation.
This standard is interpreted by the MEP.
General specification for limestone/lime - gypsum wet flue gas desulfurization project
1 scope of application
This standard specifies the limestone/lime - gypsum wet flue gas desulfurization project design, construction, acceptance, operation and maintenance
skills requirement.
This standard applies to limestone/lime - gypsum wet flue gas desulfurization project can be used as construction project environmental impact assessment,
Environmental protection facilities design, construction, acceptance and operation and management of technical basis.
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 book
standard.
GB 2893 safe color
GB 2894 safety signs and guidelines for their use
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 7231 Industrial pipes of the basic identification of color, identification symbols and safety signs
GB 12348 industrial enterprises boundary environmental noise emission standards
GB/T 12801 production safety and health requirements General
GB/T 13148 stainless steel clad steel welding technology requirements
GB/T 13869 Electricity safety guidelines
GB 18241.1 Rubber lined - Part 1. Equipment anti-corrosion lining
GB 18599 general industrial solid waste storage, disposal site pollution control standards
GB 50009 Building structural load specifications
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 50019 Industrial building heating, ventilation and air conditioning design specifications
GB 50033 architectural lighting design standards
GB 50040 Power Machinery Basic Design Specification
GB 50046 industrial building anti-corrosion design specifications
GB 50050 industrial circulating cooling water treatment design specifications
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 50187 General design of industrial enterprises
GB 50222 interior design fire protection specifications
GB 50231 Mechanical Equipment Installation Engineering Construction and Acceptance Common Specifications
GB 50243 ventilation and air conditioning construction quality acceptance criteria
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 50755 Steel Construction Project Code
GB 51245 Industrial building energy-saving design uniform standards
Design Code for Roads and Mines
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
GBZ/T 194 workplace protection against occupational poisoning Hygienic engineering protective measures norms
AQ 3009 Hazardous Location Electrical Safety Standard
DL/T 5044 Power Engineering DC Power System Design Technical Specification
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 emission sources continuous emission of flue gas monitoring system technical requirements and monitoring methods
HG/T 2451 Equipment Corrosion-resistant rubber lining
HG/T 2640 glass flake construction technology
HG/T 20678 lining steel shell design specifications
HGJ 29 brick lining chemical equipment
JB 4710 steel tower container
SY/T 0326 steel tank lined epoxy glass steel technical standards
3 Terms and definitions
3.1 limestone/lime-gypsum wet flue gas desulfurization process flue gas limestone/lime-gypsum wet desulphurization
process
Refers to the use of calcium-based material as an absorbent, remove flue gas sulfur dioxide (SO2) and the recovery of by-product flue gas desulfurization
art.
3.2 desulfurization project desulphurization project
Refers to the facilities, equipment, components and system integration required to remove SO2 and other sour gases from the flue gas with absorbent.
3.3 absorbent absorbent
Refers to the reaction of SO2 and other acidic gases alkaline substances. Absorption of limestone/lime-gypsum wet FGD process
Agents for the limestone (CaCO3), lime (CaO).
3.4 absorber absorber
Refers to the desulfurization project to achieve absorbent and SO2 and other sour gas reaction facilities.
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 percentage of SO2 contained in the flue gas without desulfurization, according to the formula (1)
Count.
Desulfurization efficiency = (C1-C2)/C1 × 100% (1)
Where.
C1 - conversion concentration of SO2 in flue gas before desulfurization, mg/m3;
C2 - SO2 flue gas desulfurization concentration, mg/m3.
3.7 Ca/S Ca/S mole ratio
Refers to the ratio of the number of moles of CaCO3 and CaO added to the absorbent to the number of moles of SO2 removed by the absorber.
3.8 booster fan boost fan
Refers to the fan to overcome the flue gas desulfurization project generated new resistance.
3.9 oxidation fan oxidation fan
Refers to the desulfurization of calcium sulphite generated oxidation of calcium sulfate fan.
3.10 Particle
Refers to the total suspended solids and the particulate matter in the solution.
3.11 desulfurization wastewater FGD waste water
Refers to the desulfurization project of the production of waste water.
3.12 Liquid to gas ratio (L/G) liquid/gas ratio
Refers to the slurry circulation (L) and the absorber outlet saturated flue gas volume (m3) ratio.
3.13 slurry circulation dwell time cycle slurry retention time in absorber slurry tank
Refers to the absorption tower slurry tank all the time required for the circulation of slurry for the absorption tower slurry tank effective volume (m3) and circulation
Ring slurry total (m3/min) ratio.
4 pollutants and pollution load
4.1 Absorption tower inlet flue gas conditions.
a) SO2 concentration (dry basis conversion) should not be higher than 12000 mg/m3;
b) The amount of flue gas should be more than 50,000 m3/h (dry basis);
c) flue gas temperature should be 80 ℃ ~ 170 ℃;
d) The concentration of particles (dry basis conversion) should not be higher than.200 mg/m3.
4.2 limestone/lime - gypsum wet flue gas desulfurization process main application areas include. power generation boilers, industrial boilers and burning
Knot/pellet, coke oven, ceramic kiln.
4.3 New Project desulfurization project design and SO2 concentration should be used under the conditions of the largest continuous data; renovation and expansion project desulfurization
The design of the project flue gas volume and SO2 concentration should be based on the measured value and take full account of the trend of change after comprehensively determined or through
Analogy of 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, SO3, HCl, HF, etc);
d) smoke particulate matter concentration and composition;
e) flue gas pressure, moisture content;
f) pollutant equipment and working conditions.
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 required to complete the content and depth of approval, approval
Quasi and record. Desulfurization project construction should be the national project construction procedures.
5.1.3 Desulfurization Project SO2 emission concentration should meet the national and local emission standards.
5.1.4 desulfurization project design should take full account of the fuel, raw materials and the main project load changes to improve the desulfurization process system
Adaptability and adjustability.
5.1.5 desulfurization project required water, electricity, gas, steam and other auxiliary media should be provided by the main project. Absorbents and by-products
Should have a metering 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 design should be consistent with the provisions of GB 50087 and GB 50040, the boundary noise should meet the requirements of GB 12348.
5.1.7 desulfurization by-products that gypsum, gypsum should consider the comprehensive utilization. No comprehensive utilization conditions, the storage site,
Gypsum silos, gypsum storage room and other construction and use should be consistent with the provisions of GB 18599.
5.1.8 After the desulfurization wastewater is treated, the direct discharge shall meet the requirements of national and local emission standards.
5.1.9 desulfurization project automatic continuous smoke monitoring system (CEMS) set up and operation should be consistent with HJ/T 75, HJ/T 76
The provisions of the local environmental protection department and the requirements.
5.1.10 Desulfurization project design, construction and operation and maintenance should be consistent with national and industry related to quality, safety, health, fire, etc.
Regulations and standards.
5.2 Engineering composition
5.2.1 Limestone/Limestone - Gypsum Wet flue gas desulfurization projects include flue gas desulfurization systems, utility systems, ancillary works.
5.2.2 flue gas desulfurization process system includes flue gas system, absorbent preparation system, absorption system, by-product processing system, pulp
Liquid discharge and recovery systems and desulfurization wastewater treatment systems.
5.2.3 Common system Including process water system, compressed air system, steam system.
5.2.4 Auxiliary projects include electrical systems, buildings and structures, water supply and drainage and fire fighting systems, heating, ventilation and air conditioning, roads
Road and green and so on.
5.3 General layout
5.3.1 General provisions
5.3.1.1 The general layout of the desulfurization project should meet the requirements of the state and related industries and 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.
5.3.1.2 desulfurization project should be to avoid the relocation of the main project of the construction of buildings (structures) and underground pipelines. When unavoidable, should
Take reasonable transitional measures.
5.3.2 General layout
5.3.2.1 absorption tower should be arranged near the chimney, slurry circulation pump should be arranged next to the absorption tower. Absorbent preparation and desulfurization byproduct
Material handling should be based on process and site conditions layout.
5.3.2.2 accident slurry tank or accident slurry tank should be easy to use multiple sets of devices sharing.
5.3.2.3 absorbent hopper, gypsum or gypsum storage room should be arranged near the main transport corridor.
5.3.2.4 The elevation of the desulfurization site should be free from flood damage. If the desulfurization project in the main plant area circular road, flood control standards and
The main plant area consistent; if the main plant area of circular roads, flood control standards and other venues.
5.3.3 Transportation
5.3.3.1 desulfurization project within the road design, should ensure that the material transport convenience, fire access, smooth, easy maintenance, full
Drainage requirements of the venue and meet the requirements of GB J 22.
5.3.3.2 The desulfurization road in the project area should form a circular road network with the road in the factory. According to the production, fire and maintenance needs,
Should set the road, fire engine access and sidewalks.
5.3.3.3 Material loading and unloading area Longitudinal slope of the parking section should be a flat slope, when the layout is difficult, the slope should not be greater than 1.5%, should be set
Sufficient cars will be car, swing field, and road surface hardening requirements.
5.3.3.4 Desulphurization projects The roads in densely-populated areas should be treated with concrete ground hardening, etc., in order to facilitate maintenance and cleaning.
5.3.4 pipeline layout
5.3.4.1 desulfurization pipeline layout should be based on the total layout, pipeline transportation medium, construction maintenance and repair and other factors to determine,
In the plane and space should be coordinated with the main project.
5.3.4.2 The centralized arrangement of pipes shall follow the following principles. pipes containing corrosive medium shall be arranged at the lowest level of the pipe rack, common pipes
Road, cable tray in turn arranged in the upper.
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 and reasonable process technology, should meet
Environmental management requirements under the premise of fully taking into account the 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, the comprehensive utilization of desulfurization by-products, site layout and other factors, after 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 requirements for desulfurization projects, desulfurization should adopt appropriate configuration of the project
With a machine a tower, but also can be more than one tower, more than one tower; when using multiple towers should consider adequate maintenance time, transport
Line flexibility and isolation measures.
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 operation, testing, inspection, maintenance platform and escalator, and in line with the requirements of GB 4053.
6.2 process
Limestone/lime - gypsum wet flue gas desulfurization typical process shown in Figure 1.
Figure 1 limestone/lime - gypsum wet flue gas desulfurization process schematic
6.3 flue gas system
6.3.1 New Project The original flue gas design temperature should be used to provide the design value of the main project. Original expansion of the original design flue gas temperature
Degrees should be used before absorption tower flue gas system to measure the maximum temperature and leave some margin.
6.3.2 When the absorption tower and the main project using the unit system configuration, should consider the combination of desulfurization booster fan and induced draft fan; when
A number of main projects combined absorption tower, the desulfurization booster fan should be set.
6.3.3 For flue gas heat exchanger desulfurization project set, the net flue gas temperature after heating should consider the chimney corrosion and environmental requirements comprehensive
OK together.
6.3.4 flue gas system flapper doors should have to prevent leakage.
6.3.5 When two or more absorption towers are combined with one flue gas outlet, the outlet of each absorption tower shall be provided with a maintenance isolation baffle door.
6.3.6 Desulfurization absorption tower inlet flue may contact the slurry area, and the desulfurization absorption tower outlet to the chimney inlet
Flue should be used anti-corrosion measures.
6.3.7 flue design should meet the flue strength, stiffness and vibration within the allowable range, anti-corrosion flue should minimize the inner strut
Quantity.
6.3.8 Desulfurization flue and connecting equipment should be used to connect the compensator, compensator should be non-metallic material.
6.3.9 desulfurization flue should be installed at a low automatic drainage system. Low flue drain and chimney condensate water should pass through
Desulfurization project reuse.
6.4 absorbent preparation system
6.4.1 A single set of limestone/lime discharge system output should meet the 6h ~ 8h delivery desulfurization project 1d limestone/lime demand
the amount.
6.4.2 absorbent preparation can be used to pulverize the system pulverizing or pulverizing, pulping system which is divided into wet grinding mill and dry grinding
Pulping.
6.4.3 grinding system pulping.
a) limestone wet grinding pulping system should set up a set of spare to ensure overhaul safety;
b) Design capacity of limestone weighing feeder should be matched with wet ball mill, leaving a margin of 20%. Wet ball mill
Machine and slurry cyclone should be unit system configuration, the units can be connected;
c) The total capacity of the slurry tank in the wet grinding pulping system should not be less than the total slurry consumption of 6 h at design conditions.
6.4.4 limestone dry milling system should focus on setting and consider spare.
6.4.5 When used to pulverized pulp, the total capacity of the slurry tank should not be less than 4h under design conditions slurry consumption.
6.4.6 Silo capacity should be based on the nature of transport and materials to determine and take unorganized emission control measures.
6.4.7 Desulfurization with quicklime CaO content should not be less than 80%, fineness should not be less than 150 mesh 90% sift rate.
6.4.8 desulfurization limestone CaCO3 content should not be less than 90%, fineness should not be less than 250 mesh 90% sift rate.
6.4.9 absorption tower slurry system should adopt the loop piping system or frequency control, to avoid the slurry deposition.
6.5 Absorption system
6.5.1 Absorption tower The spray tower, composite tower and pH tower can be used. Complex towers include boiling foam, swirling bubbling, tray
Plate, turbulent pipe grid, etc .; pH tower, including a single tower double pH, twin towers pH value.
6.5.2 Absorption tower should be based on processing efficiency, site layout conditions, operating energy requirements and long-term operating stability and other factors
Comprehensive selection.
6.5.3 absorber design should meet the following basic requirements.
a) Absorption tower should adopt integrated structure, integrated absorption tower should also have the slurry storage, by-product oxidation, flue gas
SO2 absorption and demisting function;
b) absorption tower design positive pressure should not be less than 1.2 times the maximum operating pressure, the design negative pressure of the maximum operating negative pressure of 1.2
Times
c) Absorption tower flue gas area tower cross-sectional size should ensure that the most unfavorable design conditions, the tower velocity of not more than 3.8 m/s;
d) The choice of liquid to gas ratio should consider inlet flue gas conditions, desulfurization efficiency, spray coverage and other factors;
e) absorption tower slurry pool volume should ensure that the absorption tower slurry slurry circulation residence time of not less than 4.2 min;
f) Absorption tower different functional areas should be left with enough mounting holes and manhole repair. The size of the mounting holes should be enough to fit the installation
need;
g) Absorption tower original flue gas inlet wet and dry interface should adopt reliable anti-corrosion measures.
6.5.4 limestone as absorbent, the absorption tower slurry pH value should be controlled between 5.2 to 5.8. Use lime as suction
When collected, the absorption tower slurry pH value should be controlled between 5.2 to 6.2.
6.5.5 Absorption system calcium to sulfur ratio (Ca/S) should not exceed 1.03.
6.5.6 absorption tower slurry circulation pump should adopt the same m...
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