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HJ 2049-2015

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Detail Information of HJ 2049-2015; HJ2049-2015
Description (Translated English): Technical specifications for waste gas control of lead smelting
Sector / Industry: Environmental Protection Industry Standard
Word Count Estimation: 16,148
Date of Issue: 2015-11-20
Date of Implementation: 2015-12-01
Regulation (derived from): Ministry of Environment Announcement 2015 No.72

HJ 2049-2015
Technical specifications for waste gas control of lead smelting
National Environmental Protection Standard of the People 's Republic of China
Technical specification for waste treatment of lead smelting
2015-11-20 release
2016-1-1 implementation
Ministry of Environmental Protection released
Directory
Preface I
1 Scope of application 1
2 normative reference document 1
3 terms and definitions
4 pollutants and pollution load .3
5 General requirements 5
6 process design 6
7 Major process equipment and materials
8 detection and process control ..12
Major auxiliary works
10 Labor safety and occupational health 14
Construction and Acceptance
12 Operation and Maintenance
Preface
In order to implement the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution,
Lead smelting exhaust gas treatment project construction and operation management, prevention and control of environmental pollution, environmental protection and human health, the development of this standard
quasi.
This standard specifies the technical requirements for the design, construction, acceptance, operation and maintenance of lead smelting exhaust gas treatment works
This standard is a guiding standard.
This standard is the first release.
This standard is organized by the Ministry of Environmental Protection Science and Technology Standards Division.
The main drafting unit of this standard. Yunnan Asia-Pacific Environmental Engineering Design and Research Co., Ltd., Kunming Metallurgical Research Institute, Kunming
Nonferrous Metallurgical Design and Research Institute, Yunnan Chihong Zinc and Germanium Co., Ltd.
The Environmental Protection Department of this standard approves on November 20,.2015.
This standard has been implemented since January 1,.2016.
This standard is explained by the Ministry of Environmental Protection.
Technical specification for waste treatment of lead smelting
1 Scope of application
This standard specifies the technical requirements for the design, construction, acceptance, operation and maintenance of lead smelting exhaust gas treatment works.
This standard applies to lead concentrate as raw material lead smelting process of waste gas generated by the governance project can be used as environmental impact assessment
Price, engineering consulting, design, construction, acceptance and operation and management of the technical basis.
This standard does not apply to the treatment of renewable lead smelting waste gas.
2 normative reference documents
The contents of this standard refer to the terms of the following documents. For those who do not specify a date, the valid version applies to this
standard
General rules for safety and hygiene of production equipment
GB/T 12801 General requirements for safety and hygiene of production processes
Safety and hygiene practices for lead
Determination of particulate matter and sampling method of gaseous pollutants in exhaust gas of fixed pollution sources GB/T 16157
Technical specification for lead smelting and dust - proof and anti - virus
Standard for Hazardous Waste Storage Pollution Control
Standard for Pollution Control of Storage and Disposal Site for General Industrial Solid Waste
GB 20424 Limits for Hazardous Elements in Heavy Metal Concentrate Products
Ecological indicators of arsenic, cadmium, lead, chromium and mercury in fertilizers GB/T 23349
Emission standard for lead and zinc industrial pollutants
Code for fire protection of building design GB 50016
Code for design of heating, ventilation and air conditioning GB 50019
Code for design of corrosion protection for industrial buildings GB 50046
Code for design of noise control for industrial enterprises GB/T
Specification for general graphic design of industrial enterprises GB 50187
Code for construction of building anti - corrosion engineering GB 50212
Uniform Standard for Acceptance of Construction Quality of Industrial Installation Engineering GB 50252
Code for construction and acceptance of low - voltage electrical appliances GB 50254 electrical installations
Code for construction and acceptance of wind turbines, compressors and pumps
Uniform Standard for Acceptance of Construction Quality of Construction Engineering
Code for fire protection of non - ferrous metal engineering design GB 50630
Code for design of dust collection for non - ferrous metal smelter GB 50753
Code for design of acid - making process for smelting flue gas GB 50880
Code for design of lead and zinc smelter GB 50985
Code for design of environmental protection engineering for non - ferrous metal industry GB 50988
Standard for Designing Hygienic Standards for Industrial Enterprises
Occupational exposure limits for workplace hazards - Part 1. Chemical harmful factors
Occupational exposure limits for workplace hazards Part 2. Physical factors
HJ/T 48 smoke and dust sampler technical conditions
Technical Guidelines for Unorganized Emissions Monitoring of Air Pollutants
Technical Specification for Continuous Monitoring of Flue Gas Emissions from Fixed Pollution Sources of HJ/T 75
Technical Requirements and Testing Methods for Continuous Monitoring System of Flue Gas Emission from Fixed Pollution Source
Technical specification for quality assurance and quality control of fixed pollution source monitoring
Technical specification for HJ/T 397 fixed source exhaust gas monitoring
Technical specification for wet flue gas desulfurization of industrial boilers and furnaces
"Construction Project (Project) Completion Acceptance Management Measures" (No. [1990] No. 1215)
3 terms and definitions
The following terms and definitions apply to this standard.
3.1 lead smelting waste gas
Refers to the lead smelting process generated by the various substances containing harmful substances.
Desulfurization efficiency desulfurization efficiency
Refers to the flue gas desulfurization before and after the standard state of dry flue gas (excluding moisture in the flue gas) SO2 concentration difference and desulfurization before the standard
State in the dry flue gas SO2 concentration percentage.
3.3 environment foggy foggy gas collecting
Refers to the system design, the melting furnace, blast furnace, smoke furnace, scum treatment furnace, casting slag and casting machine and other feeding
Mouth, outlet and out of the mouth of the smoke and other emissions of the collection process.
4 contaminants and contaminating loads
4.1 Sources and Classification of Pollutants
4.1.1 lead smelting process of waste gas mainly include all kinds of sulfur-containing dust, dust, sulfuric acid mist, electrolytic acid mist.
A) sulfur-containing dust is mainly produced in the lead concentrate sintering, melting, reduction, slag treatment and other processes. The main pollutants are particles
Sulfur dioxide, and lead, zinc, arsenic, thallium, cadmium, mercury and other heavy metals and compounds.
B) dust-containing gases are mainly produced in the process of loading and unloading, transportation, batching, granulation, drying, feeding and lead melting, ingot and other processes,
The main pollutants are particulate matter.
C) sulfuric acid mist mainly produced in the acid-making process, the main pollutants for sulfuric acid.
D) electrolytic acid mist produced in the lead electrolysis workshop, the main pollutant is fluorosilicic acid.
4.2 Pollution load
4.2.1 The amount of flue gas in the lead smelting process is determined by actual measurement. All kinds of exhaust gas discharged from each process can be exhausted
Measurement, exhaust emissions measurement should be consistent with HJ/T 55, HJ/T 75, HJ/T 76 requirements.
4.2.2 If there is no actual measurement data, the exhaust emissions can be similar to the same scale of production, similar raw materials and products or similar processes
Of the emission data is determined or determined by material balance.
4.2.3 Lead Smelting Process Flue gas emissions can be checked by the data given by reference formula (1) or Table 1.
.(1)
Where.
Q - flue gas discharge equipment hour exhaust emissions (m3/h);
P - Emission of pollutants from a flue gas exhausting equipment (kg) during the calculation period;
C - the average concentration (mg/m3) of a pollutant monitoring period for a flue gas discharge equipment;
F - Production load (%) during the monitoring period of a flue gas discharge equipment;
T - the number of hours of production (h) of a flue gas discharge equipment during the calculation period;
Table 1 Source and concentration of pollutants in lead smelting exhaust gas (mg/m3)
Exhaust gas Source Source Particle concentration
SO2
(Volume concentration%)
Lead and its combination
Mercury and its compounds
Dusty smoke
Raw material preparation, transportation and so on
process
5000 ~ 10000 /
1400 ~ 3000 50 ~ 250
Sulfur
Flue gas
sintering
Flue gas
ISP sintering machine 25000 ~ 40000
An average of 1.0 to 6.0 minimum
0.2, the use of oxygen-rich technology
Up to 10 or more
Smelting
Flue gas
ISP blast furnace 150000 ~ 250000 <0.5
Melting furnace (bottom blowing smelting,
Top blowing smelting, oxygen-rich bottom
Blowing, oxygen-rich side blowing)
100000 ~.200000 5 ~ 25
reduction
Flue gas
Blast furnace, oxygen-rich direct
Reduction furnace
8000 ~ 30000 0.02 ~ 3
Smoke
Flue gas
Smoke furnace 50000 ~ 100000 0.02 ~ 0.03
Melting lead
Flue gas
Melting lead pot 1000 ~.2000 trace
Electricity lead
Flue gas
Electric lead pot 1000 ~.2000 /
scum
reflection
Flue gas
Scum reflow furnace 5000 ~ 10000 <1
surroundings
Set smoke
Flue gas
Melting furnace, blast furnace,
Smoke furnace, scum treatment
Furnace and other feeding mouth, cast
Slag machine and casting machine
1000 ~ 5000 irregular, large fluctuations
Sulfuric acid system
Electrolytic acid mist lead electrolysis workshop
5 General requirements
5.1 General provisions
5.1.1 Lead smelting enterprise construction and operation management should meet the national and local related industry policy, planning and other management requirements.
5.1.2 lead smelting waste gas treatment project should strictly implement the environmental protection project "three simultaneous" system.
5.1.3 Lead smelting emissions should meet the requirements of GB 25466 and local emission standards, in line with the environmental impact assessment approval
And to meet the total amount of pollutant control requirements.
5.1.4 lead smelting should be easy to produce waste gas in the organization of the location of the organization set up waste gas collection and treatment equipment, waste gas treatment process
Should prevent the escape of exhaust gas.
5.1.5 lead smelting waste gas treatment process to prevent the occurrence of secondary pollution, to ensure that wastewater discharge standards to ensure that the governance process to collect
Of the dust (dust) and other solid waste disposal to meet the provisions of GB 18597, GB 18599, and meet the
EIA approval documents required.
5.1.6 lead smelting waste gas treatment project should take feasible technology, production management and administrative management and other effective measures to prevent heavy metals
Such as the unorganized emissions of contaminants.
5.1.7 Lead smelting exhaust gas treatment project should be installed qualified on-line monitoring equipment, monitoring alarm system and emergency treatment system, in the
The line monitoring facility should be connected with the local environmental protection department as required.
5.1.8 lead electrolysis should be taken to reduce the acid mist and acid mist purification treatment measures to ensure that the operating environment and efflux acid mist concentration
Allowable concentration limits.
5.1.9 lead anode mud in the process of comprehensive utilization of waste gas should be based on the specific process, the type of gas and gas, select the appropriate
Dust, desulfurization, deacidification (alkali) and removal of other harmful gases.
5.1.10 lead smelting flue gas acid and acid waste gas purification system shall not be set up flue gas bypass.
5.2 Clean production
5.2.1 lead smelting enterprises should actively adopt energy-saving emission reduction and cleaner production technology, from the source control of pollutants generated.
5.2.2 lead smelting enterprises should be the full analysis of mineral raw materials, into the furnace lead concentrate heavy metal content should be consistent with GB 20424
begging.
5.2.3 lead smelting waste gas treatment project should be selected according to the smelting process, select the safety, environmental protection, energy saving waste gas treatment workers
Arts and equipment.
5.2.4 smoke (powder) dust transport equipment to be sealed or in a negative pressure state, to prevent leakage of environmental pollution.
5.2.5 dust collection system dust, arsenic, cadmium, mercury and other harmful elements is too high, it is not appropriate to return to the smelting system
5.3 Engineering composition
5.3.1 Lead smelting waste gas treatment project, including the main project, auxiliary engineering and public works.
5.3.2 The main project includes exhaust gas collection system, dust collection system, desulfurization system, acid mist control system and by-product processing system.
5.3.3 auxiliary works include electrical, civil, HVAC, fire, instrumentation and control, on-line monitoring, laboratory analysis.
5.3.4 Public works include power supply systems, steam systems, compressed air systems, process water and circulating water systems.
5.4 General layout
5.4.1 The general layout shall comply with the relevant provisions of GB 50187, GB 50988 and GB 50985.
5.4.2 Lead smelting exhaust gas treatment facilities Plane layout should meet the function of the processing unit and the processing process requirements, processing facilities
The spacing should be compact and reasonable to meet the requirements of construction and installation.
5.4.3 Pipeline layout should be based on the overall layout, the treatment area within the plane layout, tube media, construction and maintenance
Maintenance and other factors to determine the plane and space should be coordinated with the main project.
5.4.4 by-product processing system should be combined with the process and site conditions according to local conditions.
6 process design
6.1 General requirements
6.1.1 Lead smelting exhaust gas treatment process should be based on the size of lead smelter and different processes of waste gas, waste gas composition and pollution
Substance concentration of the actual situation to determine.
6.1.2 Lead smelting exhaust gas treatment project design and construction should take effective sound insulation, noise and vibration measures, noise and vibration control
System should meet the requirements of GB/T 50087.
6.1.3 When using a dry dust collector such as a bag filter or an electric precipitator, there shall be measures to prevent the condensation of flue gas
6.1.4 Waste treatment should focus on energy-saving design and waste heat utilization.
6.2 Lead smelting waste gas treatment process
6.2.1 lead smelting exhaust gas treatment process shown in Figure 1.
Lead concentrate smelting reduction of tobacco and tobacco preparation
Dust collection
emission
Waste heat recovery
Acid production
Desulfurization
emission
Waste heat recovery
emission
Desulfurization scum treatment preliminary fire refining electrolytic refining ingot waste heat recovery lead ingot
Waste heat recovery
Desulfurization
emission
Copper and sulfur dust collection
emission
Dust collection
emission
Reduce acid mist concentration
emission
Crude lead
Figure 1 lead smelting exhaust gas treatment process diagram
6.3 Waste dust collection
6.3.1 for the lead smelting enterprises using different smelting process, dust collection process technology in Table 2.
Table 2 lead smelting exhaust gas typical dust collection technology flow chart
Particulate matter source dust collection process process parameters a Remarks
Lead concentrate in the warehouse
Material, transportation, ingredients
And other processes to produce dust
Collecting hood → bag dust collection (or micro power collection dust
B) → exhaust pipe
Total dust removal efficiency> 99.5%, efflux
Dust concentration <50mg/m3
Collect dust to return to production
Sintering machine dust
Sintering machine flue gas → dust chamber (or cyclone dust collection
Device) → electric dust collection → acid
Concentration of soot in the production of flue gas
300mg/m3
Purified flue gas acid, received
Set the dust back to the batching process
Smelting furnace dust
Smelting furnace flue gas → waste heat boiler → electric dust collection
→ acid production
Concentration of soot in the production of flue gas
300mg/m3
Purified flue gas acid, received
Set the dust back to the batching process
Reduction furnace dust
Reduction furnace flue gas → waste heat boiler → cooling smoke
Road → bag dust → desulfurization → exhaust pipe
Total dust removal efficiency> 99.9%, efflux
Soot concentration <30mg/m3
Collection of smoke and dust to send with concentrate
Smoke furnace dust
Smoke flue gas → waste heat boiler → cooling smoke
Road → bag dust → desulfurization → exhaust pipe
Exhaust dust concentration <50mg/m3
Collecting dust as a byproduct
Use
Melting lead pot/electric lead pot
Lead dust
Set hood → bag dust collection → exhaust tube
Total dust removal efficiency> 99.6%, efflux
Lead dust concentration <8mg/m3
Collection of lead dust should be sealed storage
Transport, timely return process
Scum reflection furnace dust
Flue gas → surface cooler (or cooling flue)
→ bag dust collection → exhaust pipe
Total dust removal efficiency> 99.8%, efflux
Soot concentration <20mg/m3
Collection of smoke should be sealed storage and transportation,
Timely return to the ingredients process
Environment set smoke (powder)
Set hood → bag dust collection → exhaust tube
Total dust removal efficiency> 99.5%, efflux
Smoke (powder) dust concentration <25mg/m3
Collection of smoke (powder) dust to send concentrate
Warehouse ingredients
Note. a process parameters in the smoke (powder) dust should also meet the dust lead content <8mg/m3.
B for material crushing, screening, belt conveyor system dust collection.
6.3.2 Flue gas collection should meet the requirements of GB 50753 and meet the following requirements.
A) dust collection system should be negative pressure operation; ash discharge equipment should be closed well, to prevent secondary pollution.
B) should control the appropriate air velocity and dust collection pipe pressure, to prevent turbulence around the collector cover, affecting the dust collection effect.
C) When using dry dust collector such as bag filter or electric precipitator, there should be measures to prevent flue gas condensation.
D) Dust collection system configuration should be based on furnace type, capacity, furnace conditions, lead ore composition, auxiliary fuel composition, desulfurization process, flue gas workers
Conditions, weather conditions, operation and maintenance management to determine.
D) dust collection device dust collection performance should meet the requirements of the next process concentration limit, the exhaust gas should meet the relevant emission standards
Fixed smoke (powder) dust emission concentration and smoke black limit requirements.
E) When the production process parameters such as smelting furnace, reducing furnace and flue gasifier fluctuate, the dust collecting system should set the buffer or pretreatment facility.
F) in the dust to ensure that the dust is fully trapped under the premise of dust should be based on the nature of gas, combined with economic principles, select a separate
Or centralized collection of dust. Exhaust gas containing different components of smoke (powder) dust should be set to separate dust collection.
6.3.3 Smoke (powder) dust discharge should meet the following requirements.
A) smoke (powder) dust transmission device to be simple, easy maintenance and management, less failure, high operating rate.
B) should be based on dust, intermittent or continuous, smoke (powder) dust properties, dust and dust collector dust at the mouth of the pressure
State and other parameters to consider the choice of smoke (powder) dust transmission device
C) If the use of pneumatic conveying device, the distance is close to the vacuum suction type, the distance should be used in compressed air or nitrogen pressure
Send way.
6.4 Waste gas desulfurization
6.4.1 waste gas acid
6.4.1.1 Oxygen-enriched smelting process, oxygen-rich slag reduction process, ISP sintering process flue gas should enter the acid system acid; other such as
Ordinary reduction furnace flue gas, flue gas furnace, the environment set smoke flue gas, etc., according to the actual situation with the high concentration of exhaust gas with the best
Gas, and then into the acid system.
6.4.1.2 lead smelting waste gas system design should be consistent with GB 50880 and other related acid production process design requirements. new
Construction and renovation projects should be used adiabatic evaporation dilute acid cooling flue gas purification technology. After the acid system should be built desulfurization system to ensure that waste
Gas discharge standards.
6.4.1.3 lead smelting process Sulfuric acid export acid fog can not meet the standard, can be installed in the end of the fiber defogger to reduce the acid mist
Prepared.
6.4.1.4 acid produced in the process of wastewater should be processed to meet the water quality requirements, should try to do waste water recycling.
6.4.1.5 Waste heat boilers shall comply with the relevant standards for the design of flue-type waste heat boilers and shall also take into account the condensation of gaseous lead in the exhaust gas
Pipe and waste heat boiler bonding problem, should be in the waste heat boiler before the additional radiation cooler to prevent damage to the boiler.
6.4.2 Low concentration SO2 flue gas desulfurization
6.4.2.1 Ordinary reduction furnace flue gas, flue gas, flue gas and other SO2 content exceeding the emission standards and can not enter
Acid production of low concentration of sulfur dioxide emissions, as well as acid-producing system at the end of the acid-producing off-gas, desulfurization should be carried out.
6.4.2.2 low concentration of SO2 waste gas desulfurization process should use wet process, in addition to high desulfurization efficiency, but also further wet dust,
Reduce the content of heavy metals in lead smelting flue gas. Desulfurization process route shown in Figure 2.
Figure 2 desulfurization process road map
6.4.2.3 desulfurization system design should be standard treatment, recycling, does not produce secondary pollution for the principle, should be preferred to use
By-product can be resource utilization of the desulfurization process; should be based on the local desulfurization agent source, by-product market, safety environment and other conditions into
Line technology and economic comparison to determine the desulfurization process. See Table 3.
Table 3 various desulfurization process characteristics
Technical Method SO2 Content (%) Raw material
Raw material consumption ratio
(T/tSO2)
Byproduct desulfurization efficiency
Zinc Oxide <3.5 Zinc Oxide Powder 1.27
Zinc sulfate, sulfide
Zinc, high concentration
SO2
General <90%
Ammonia <3.5
Liquid ammonia, ammonia
Water, urea and so on
Ammonia source
0.532 (broken liquid ammonia)
Ammonium sulfate fertilizer,
High concentration SO2
> 95%
Organic solution 0.5 ~ 18 Organic amine 0.9 ~ 3.0 × 10-3 High concentration SO2> 96%
Sodium base method <3.5
Sodium hydroxide,
Sodium carbonate
1.25 ~ 1.66
Sodium sulfate, sulfide
Sodium acid
> 95%
Limestone (carbide slag) /
Gypsum method
<1.5
Lime, calcium carbide
Slag and so on
1.8 to 1.9
Desulfurization gypsum
Calcium sulfate
> 90%
6.4.2.4 limestone/lime method, sodium alkali process desulfurization process can refer to HJ 462 implementation, other methods should be consistent with national
Regulations.
6.4.2.5 desulfurization device should be based on the amount of waste gas, sulfur dioxide content and other requirements, according to the processing capacity margin is not less than 10% of the load
To design.
6.4.2.6 Exhaust gas should be dusted before entering the desulfurization system. The amount of solid particulate matter in the exhaust gas entering the desulfurization system shall not affect the
Product quality and normal operation of the device.
6.4.2.7 desulfurization program design should first consider the comprehensive utilization of desulfurization by-products, when the desulfurization by-product temporarily can not be used,
Should be toxic identification, according to the nature of the treatment and disposal, so that it does not produce secondary pollution.
6.4.2.8 desulphurization system in the long-term maintenance of continuous operation of the device should be built standby system.
6.4.2.9 desulfurization system should be set up accident pool (tank), cofferdam and other emergency facilities to prevent the sudden changes in pollutants when the accident
Or security risks.
6.4.3 Exhaust gas pipeline
6.4.3.1 Exhaust gas pipeline should consider the desulfurization system after the construction of flue gas pressure drop, flue gas pressure should be set when the pressurization
Power plant.
6.4.3.2 The exhaust gas piping shall be designed so that the soot will not be deposited in the flue and the cleaning device shall be provided in the flue.
Add dust to the flue, should consider additional load.
6.4.3.3 flue pipe length should be installed when the expansion joints, flue expansion joints, flue gas sealing machine should be set as needed vertical
Drainage, drainage can be incorporated into the wastewater treatment system or after settlement.
6.4.4 Absorption system
6.4.4.1 absorption system should meet the technical performance requirements, should choose a small footprint, short process, energy saving and low consumption of technology and equipment.
6.4.4.2 The absorption system shall be provided with an accident pump, the accident tank (pool), the event tank (pool) capacity shall meet the requirements of the event when the liquid material
Switching and storage.
6.4.4.3 The slurry tank (tank) shall be protected against corrosion and shall be provided with an anti-deposition or clogging device.
6.4.4.4 Desulfurization agent reserves should be less than 3-7d dosage, according to the distance between the transport distance and supply capacity increase or decrease reserves.
6.4.4.5 should reduce dust, oil and other impurities into the desulfurization solution, if necessary, can be configured with the corresponding impurity facilities.
6.4.4.6 desulfurization tower should adopt low pressure drop type, the top or outlet flue should be equipped with defogger.
6.4.4.7 internal structure of the desulfurization tower, spray layer set and liquid to gas ratio, gas velocity, should ensure that the desulfurization liquid and flue gas full contact and off
Sulfur standard, and at the same time control desulfurization agent escape.
6.4.4.8 Piping material should be designed with the process, piping design should avoid slurry deposition, slurry piping should be set to emptying and
Flushing facilities.
6.4.4.9 easy to fouling equipment and parts should be set up convenient and reliable flushing facilities. Absorption tower defogger, cut the mouth, etc. often or set
It is advisable to use remote control flush valve for automatic control and remote operation.
6.4.4.10 desulfurization tower (tank) maintenance, the need to discharge the solution, should be in the tower or out of the pipeline opening lower position to set the drainage hole
And the drainage tube, with the valve control, in order to stay into the tower maintenance.
6.4.5 by-product processing system
6.4.5.1 The by-product variety and quality grade should be selected according to the technical requirements and market conditions of the selected technology and should not affect the off
The main technical performance of sulfur system.
6.4.5.2 By-product production system design and layout should be based on product nature, processing conditions, transport requirements to determine.
6.4.5.3 lead smelting exhaust gas desulfurization process produced by the sale of desulfurization by-product quality should be consistent with national or industry standards, by-product
Commodities for agricultural fertilizers should also meet the requirements of GB/T 23349.
6.4.5.4 by-product processing system should take full account of the original smoke dust content and composition of the by-product quality impact, if necessary, should be added
The corresponding processing equipment.
6.5 secondary pollution control
6.5.1 lead smelting enterprises should be from the process, system and management to prevent the occurrence of secondary pollution, and in accordance with the requirements of the preparation of environmental emergency
case.
6.5.2 Raw materials, intermediate materials, all kinds of slag and mud, dust collection of dust transport, handling, storage process, should be strictly controlled sprinkle
Falling, dust and seepage and other leaks.
6.5.3 dust collection system dust, arsenic, cadmium, mercury and other harmful elements is too high, it is not appropriate to return to the smelting system.
6.5.4 acid sludge produced during the process of desulfurization process of dust and sediment, should be strictly in accordance with the batch sampling, identification,
Hazardous wastes shall be disposed of in accordance with the relevant provisions of hazardous waste management.
6.5.5 in the desulfurization process to take measures to remove heavy metals, by-products of heavy metal content should meet the corresponding product standards,
Should consider the byproduct storage, stacking and transport, and should prevent the sewage leakage, dust and other secondary pollution caused.
7 Major process equipment and materials
7.1 dust collection system
7.1.1. The choice of dust collector should be based on the nature of the flue gas, temperature, moisture content, soot particle size, dust removal efficiency and other reasonable choice.
A) dry coarse dust collection equipment should adopt cyclone dust collector, dry fine dust collection equipment should adopt bag filter, electrostatic precipitator
And electric bag integrated dust collector.
B) commonly used wet dust collection equipment with water film cyclone dust collector, impact dust collector, self-excited dust collector and venturi tube,
Suitable for large dust containing dust, should be based on flue gas conditions and local weather conditions to choose.
7.1.2 dust collection pipe material should be strong, wear, compression and corrosion resistance characteristics.
7.1.3 When the corrosive medium contains corrosive media, the cooling device, the fan, the collector dust collector, the valve and the particulate filter, etc.
Meet the relevant anti-corrosion requirements.
7.1.4 The main materials such as filter material, filter bag and filter bag frame shall meet the requirements of environmental protection product standard and adapt to the temperature of dust
Degree and nature.
7.2 acid system
7.2.1 Acid system equipment should be used mature and reliable, corrosion-resistant, easy to operate and maintain the equipment and materials to achieve high open
Car rate.
7.2.2 sulfuric acid production facilities and equipment should have a certain degree of advanced technology, good stability, high utilization of raw materials, low energy consumption,
Pollution is small; sulfuric acid production of catalyst and facilities and equipment should have advanced technology, stable and reliable, high conversion rate of raw materials, energy consumption
Low, small pollution.
7.2.3 fan selection should be with vibration protection, counter-current protection, to avoid possible acid mist corrosion and acid deposition. Should be broad
Working range and high precision, to meet the smelting smoke uneven, frequent speed requirements.
7.2.4 Acid and acid storage system The ground should be strictly anti-corrosion, seepage, to avoid groundwater pollution.
7.2.5 acid system should be energy-saving and waste heat utilization device
7.3 Desulfurization system
7.3.1 Material selection
7.3.1.1 Desulfurizer selection principle. high desulfurization efficiency, easy to obtain, low price, easy to transport, the heavy metals in the exhaust
There is a certain role in the removal of the environment does not cause new pollution, desulfurization by-products should be non-toxic stability and have some economic value.
7.3.1.2 desulfurization system should take full account of the characteristics of the process, the choice of cost-effective, with wear-resistant, anti-corrosion properties of the material, and character
Related standards.
7.3.1.3 Desulfurization tower main material should be adapted to the desulfurization process characteristics, the nature of desulfurization agent, quality and safety control measures. The tower of its body
Its components should be coated with anti-corrosion materials, carbon steel, glass steel, alloy steel.
7.3.1.4 desulfurization liquid pump should use all-alloy or steel lined rubber material; slurry pipeline should use glass steel, alloy steel, steel lapel
Or steel lining material; solid-liquid separation equipment and absorption of contact parts should use alloy steel, glass steel, carbon steel lining and other materials.
7.3.1.5 Ammonia desulfurization process It is strictly prohibited to use copper or copper alloy valves on ammonia salt solution and ammonia pipelines.
7.3.2. Equipment selection
7.3.2.1 equipment and pipelines, parts selection and configuration should meet the requirements of long-term stable operation, the configuration should avoid the material block,
Selection of materials should be resistant to temperature, corrosion resistance, resistance to erosion and anti-crystallization.
7.3.2.2 The number of desulphurization towers shall be determined according to the scale and configuration of the smelting unit, the amount of exhaust gas, the capacity of the desulfurization tower, the flexibility of operation and reliability
Sex and layout conditions and other factors to determine.
7.3.2.3 circulating pump flow components should be able to withstand solid particles wear, acid corrosion, high chlorine, high fluoride plasma corrosion.
8 detection and process control
8.1 Analysis and testing
8.1.1 lead smelting exhaust system should be in the metallurgical furnace exports flue, dust collector, induced draft fan, desulfurization tower (tank) entrance, exhaust
Barrel and other equipment, facilities installed detection instrumentation, and analysis of test data into the control room. Instrument selection should be able to adapt to smoke
Gas temperature, dust, acid-containing environment.
8.1.2 Before and after the dust collector, the desulfurization tower (tank) should be set before and after the specification of the permanent monitoring platform and sampling holes, and meet
GB/T 16157, HJ/T 397.
8.1.3 A continuous monitoring system shall be provided at the flue gas discharge port and shall comply with the requirements of HJ/T 76; continuous monitoring shall be carried out in accordance with HJ/T 75
carried out.
8.1.4 desulfurization tower, the solution tank should be installed level gauge and supporting the alarm device, according to the need to install density meter, pH meter and other online monitoring
Measuring instruments, absorption of circulating pump outlet should be installed flowmeter and pressure gauge.
8.1.5 The test indicators include.
A) the main technical parameters of the treatment section of the exhaust gas. temperature, flow and so on;
B) the main equipment operating status. pressure, current, bearing temperature;
C) the main pollutant concentration. particulate matter, SO2, sulfuric acid mist and heavy metal indicators.
D) Desulfurization liquid. pH, density, flow, composition and so on.
8.2 Process control
8.2.1 on the basis of analysis and testing, it is appropriate to set the control system to control the process, should adopt decentralized control system (DCS)
Or programmable logic controller (PLC) to control, including data acquisition and processing, analog control, sequential control;
The control parameters involved in the control, should be set on the alarm, the lower limit, set the sound and light alarm and the necessary interlock protection; should be set up desulfurization
Bypass bypass signal.
8.2.2 Dust removal, acid making, desulfurization control room can be combined with the system and the scene to set up a separate control room, or into the main process control
Room unified monitoring. Separate dust, desulfurization system control room, cooling flue gas temperature, flue gas flow and other characteristics
Whether the main process is normal and important parameters should also be introduced into the main process control room display.
8.2.3 flue gas temperature, flow, dust collector pressure, voltage, induced draft motor current, motor windings, bearing temperature and other flue gas detection
When the parameter is abnormal and the pollutant analysis exceeds the emission limit, the material change should be checked in time.
Dust system, acid system and desulfurization system and other operating conditions, and through the control adjustment, the timely elimination of abnormal.
Major auxiliary works
9.1 Electrical systems
9.1.1 Power supply equipment and system settings should meet the relevant standards.
9.1.2 should be combined with the characteristics of the project load and the overall layout, make full use of the original facilities, the original facilities can not meet the power supply
When required, you can set up a substation or low voltage distribution room.
9.1.3 Important equipment affecting the safety of the device shall be determined in accordance with the important nature of the electricity load.
9.1.4 The main production equipment should adopt the centralized control mode. In the production equipment machine next to the scene operation box, normal
Production with centralized control, when the equipment maintenance to switch to the machine next to control.
9.2 Architecture and Structure
9.2.1 Buildings
9.2.1.1 General provisions
A) The design of the waste treatment area should be based on the process, the use requirements, the natural conditions, the construction site and so on
To carry out the overall layout, and to consider the coordination of the surrounding buildings to meet the functional requirements.
B) fire protection design of buildings should meet the requirements of GB 50016, GB 50630.
C) factory noise control design should be consistent with the provisions of GB/T 50087.
D) the building construction of the building safety level is not less than two, fire rating of not less than two. Production of fire hazards
Classified as a class. The corrosion grade of the building is strong. Building anti-corrosion on the gas and liquid phase corrosion protection, character
GB 50046, GB 50212 requirements.
E) building structures using steel frame, light steel, reinforced concrete and other structures, seismic strength to meet the relevant standards.
F) to prevent gas phase corrosion, plant power cables and control cables should be used anti-corrosion type, cable bridge should be anti-corrosion
Processing, local control cabinet should adopt anti-corrosion, dust, waterproof series, should use anti-corrosion mixed light or metal halide lamps.
G) Architectural design In addition to the implementation of this provision, it shall comply with the existing relevant design standards of the State and the industry.
9.3 HVAC
9.3.1 Heating Ventilation and air conditioning shall comply with the requirements of GB 50019.
9.3.2 production plants and other places may escape a large number of harmful gases, should be set up accident ventilation facilities, accident ventilation
The number of not less than 12 times/h.
9.4 Fire
9.4.1 fire system design should be consistent with GB 50016, GB 50630 requirements.
9.4.2 For the new construction, the fire station is set up by the whole factory. When the built-in project is equipped with the exhaust gas treatment device,
With the existing fire facilities, fire water supply system, the layout of fire water supply pipe network and the necessary fire equipment, equipment selection
Consistent with the main project.
9.4.3 Fire detection and alarm system for exhaust gas treatment system It is advisable to set up monitoring points at each exhaust gas treatment point and cooperate with the whole plant fire exploration
Measurement and alarm system to achieve communication.
9.5 water supply and drainage
Ore treatment system water supply and drainage design should be consistent with the whole plant, the system should try to use rainwater reuse and circulating water, reduce water consumption.
Labor safety and occupational health
10.1 General provisions
10.1.1 Lead smelting exhaust gas treatment device design, manufacture, installation, use and maintenance, should be consistent with GB 5083, GB/T 12801,
GB 13746 requirements, attention to labor safety and health protection.
10.1.2 Lead smelting exhaust gas treatment device construction, operation of pollutant control and emissions, should be consistent with the existing national environmental laws and regulations
The relevant provisions of the prospective.
10.1.3 Lead smelting exhaust gas treatment device construction and operation, should meet the national and local related occupational health and occupational diseases phase
Customs, regulations and standards.
10.1.4 Lead smelting exhaust gas treatment device feasibility study stage should be environmental protection, labor safety and occupational health demonstration
Capacity. In the initial design phase, there should be environmental protection, labor safety and occupational health special.
10.1.5 lead smelting exhaust gas treatment device use process The basic requirements of safety and health, protective technology and management measures should be consistent
GB/T 12801 in the relevant provisions.
10.1.6 At the same time as the lead smelting exhaust gas treatment plant is in operation, safety and sanitation facilities should also be operational and developed at the same time
The corresponding safety procedures and occupational health management system.
10.1.7 Employee safety education should be strengthened to cultivate good occupational health habits.
10.2 Labor safety
10.2.1 establish and strictly enforce the regular and regular security inspection system, the timely elimination of potential risks, to prevent accidents.
10.2.2 For regular inspection of maintenance points, should be set up safety channel. There is a dangerous place to fall, should be set cover or safety railing.
10.2.3 Exhaust gas treatment device safety protection should take effective anti-corrosion, leakproof, lightning protection, anti-static, fire, explosion and
Seismic reinforcement measures.
10.2.4 Where a toxic and harmful gas is produced or used, a gas leak detection and alarm device shall be provided in accordance with the regulations.
10.2.5 Operators should be equipped with work clothes, gloves, labor insurance shoes, gas masks, filter masks and other labor insurance products, to prevent
Burns, burns and poisoning.
10.3 Occupational health
10.3.1 The operating environment shall meet the requirements of GB Z1 and GB Z 2.1 and GB Z 2.2.
10.3.2 dust, noise and vibration, anti-electromagnetic radiation, heat and cold and other occupational health requirements should be consistent with the provisions of GB Z1.
10.3.3 Dustproof and anti-virus should meet the requirements of GB/T 17398.
Construction and Acceptance
Construction of the project
11.1.1 The general contracting, design and construction unit shall have the corresponding qualification.
11.1.2 The construction shall conform to the requirements of the construction specifications, construction procedures and management documents of the corresponding special projects of the State and the industry.
11.1.3 Construction should be in accordance with the design documents, construction drawings and equipment installation instructions for the use of the project changes should be made
Design unit design change file and then construction.
11.1.4 engineering and technical documents used in the construction of the contract, the contract documents on the construction quality acceptance requirements shall not be lower than the national
The provisions of the relevant special project specifications.
11.1.5 The equipment, materials and fittings used in the construction of the project shall conform to the relevant national standards and shall obtain the products of the supplier
Certificate before use.
11.1.6 construction in addition to comply with the relevant construction technical specifications, but also to comply with national engineering quality, safety and health, fire and other standard
quasi.
11.2 completion acceptance
11.2.1 The procedures and contents of the completion and acceptance of the project shall comply with the requirements of GB 50252, GB 50254, GB 50275, GB 50300,
Set the project (project) the completion of acceptance management approach "and other relevant provisions. Before the completion of the project acceptance, is strictly prohibited into productive use.
11.2.2 Production of main project and waste gas treatment project should be carried out at the same time environmental protection and acceptance, the existing production equipment or transformation facilities should
Separate environmental protection acceptance.
11.2.3 supporting the construction of continuous monitoring and data transmission system, should be concurrent with the project environmental protection acceptance.
11.2.4 Pressure vessels such as gas cylinders and pressure piping and their fittings shall be subject to acceptance by the competent department of special equipment.
11.2.5 Performance tests should be carried out during the production test run. Performance reports should be considered as important for environmental protection
Capacity. Acceptance procedures and contents shall comply with the relevant provisions of the relevant standards and installation documents.
12 operation and maintenance
12.1 General provisions
12.1.1 Operation, maintenance and safety management of lead smelting waste gas treatment project In addition to the implementation of this standard, it shall also comply with the requirements of the State
The provisions of the mandatory standards.
12.1.2 The exhaust gas treatment plant shall not be shut out without the approval of the local environmental protection administrative department.
12.1.3 Exhaust gas treatment device operation should be based on process requirements, regularly on all types of equipment, electrical, automatic control instruments and construction (structure) building
Objects to check and maintain, to ensure stable and reliable operation of the device.
12.1.4 The operation and maintenance procedures and management systems related to the operation and maintenance of the equipment should be established and perfected.
12.1.5 Exhaust gas treatment system operation, maintenance and maintenance should not affect the smelting system and subsequent exhaust gas treatment device is normal,
Stable, continuous operation. Overhaul should be considered and smelting facilities overhaul simultaneously.
12.1.6 During the operation of the exhaust gas treatment device, all the flue gas detection parameters, monitoring parameters and pollutant rows involved in the process control
Put the parameters, should have a sound historical record, historical records kept at least 12 months.
12.2 Personnel and Operations Management
12.2.1 The exhaust gas treatment device shall be operated by hand, and the environmental management department shall be responsible for the operation of the installation.
12.2.2 run the operator, before the job should be the following content of the professional training, the examination pass, certificate posts.
A) the necessary technical knowledge of the process, safety knowledge;
B) conditions for inspection and start requirements prior to start-up;
C) the normal operation of the disposal equipment, including the start and shutdown of the equipment;
D) control, alarm and indicate the operation and inspection of the system, as well as corrective operations if necessary;
E) optimum operating temperature, pressure, control and regulation of desulfurization efficiency, and conditions for maintaining good operation of the equipment;
F) discovery, inspection and removal of equipment failure;
G) manual operation and accident handling in an emergency or emergency situation;
H) daily and regular maintenance of equipment;
I) records and reports of equipment operation and maintenance records, as well as other events.
J) commonly used toxic and hazardous chemicals transport knowledge and anti-virus, anti-corrosion, fire safety knowledge and skills training.
12.2.3 Records of operating conditions, facility maintenance and production activities of the exhaust gas treatment system shall be established. The main records include.
A) System start, stop time.
B) raw material into the plant quality analysis data, into the plan......
Related standard:   HJ 2048-2015  HJ 2050-2015
   
 
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