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HJ 2019-2012: Technical specifications for wastewater treatment and reuse of iron and steel industry
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Technical specifications for wastewater treatment and reuse of iron and steel industry
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Standard similar to HJ 2019-2012 HJ 1014 HJ 857 GB 4915 HJ 740 HJ 612 HJ 558 Basic data | Standard ID | HJ 2019-2012 (HJ2019-2012) | | Description (Translated English) | Technical specifications for wastewater treatment and reuse of iron and steel industry | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z61 | | Classification of International Standard | 13.030.20 | | Word Count Estimation | 20,261 | | Quoted Standard | GB 12348; GB 13456; GB 16297; GB 50013; GB 50014; GB 50016; GB 50019; GB 50040; GB 50050; GB 50052; GB 50053; GB 50054; GB 50168; GB 50194; GB 50275; GB 50303; GB 50335; GB 50506; GB 50672; GBJ 22; GBJ 87; HG/T 2124; HG/T 2125; HG/T 2126; HJ/T 243; HJ/T 2 | | Regulation (derived from) | Department of Environmental Protection Notice No. 61 of 2012 | | Issuing agency(ies) | Ministry of Ecology and Environment | | Summary | This standard specifies the steel industry production units (excluding coking) technical requirements for wastewater treatment and reuse engineering principles, as well as integrated wastewater treatment and reuse of the overall project requirements, proc | HJ 2019-2012: Technical specifications for wastewater treatment and reuse of iron and steel industry
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Technical specifications for wastewater treatment and reuse of iron and steel industry
National Environmental Protection Standard of the People's Republic
Technical specification for steel industry wastewater treatment and reuse engineering
Technical specifications for waste water treatment and reuse
Of iron and steel industry
Published on.2012-10-17
2013-1-1 implementation
Ministry of Environmental Protection released
Content
Foreword.ii
1 Scope.1
2 Normative references.1
3 Terms and Definitions 2
4 Contaminants and pollution loads 3
5 General requirements. 4
6 Process Design.5
7 Main process equipment and materials 13
8 Detection and Process Control..15
9 Major auxiliary works 16
10 Labor safety and occupational health 17
11 Construction and acceptance. 18
12 Operation and maintenance.19
Foreword
To implement the Environmental Protection Law of the People's Republic of China, the Law of the People's Republic of China on Water Pollution Prevention and Control, and the Iron and Steel Industry
Water Pollutant Emission Standards, which regulate the construction and operation management of steel industry wastewater treatment and reuse projects, environmental pollution, and protection
This standard is formulated to protect the environment and human health.
This standard specifies the general requirements, process design, main process equipment and materials for the treatment and reuse of steel industry wastewater.
Technical requirements for materials, testing and control, construction, acceptance and operation.
This standard is the first release.
This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection.
This standard was drafted. China Metallurgical Construction Research Institute Co., Ltd.
This standard was approved by the Ministry of Environmental Protection on October 17,.2012.
This standard has been implemented since January 1,.2013.
This standard is explained by the Ministry of Environmental Protection.
Technical specification for steel industry wastewater treatment and reuse engineering
1 Scope of application
This standard specifies the technical requirements and reuse principles for wastewater treatment engineering of steel industry production units (excluding coking), and
General requirements, process technology, design parameters, equipment and materials, testing and control, and application of comprehensive sewage treatment and reuse projects
Technical requirements for work, acceptance and operation.
This standard applies to the process control and comprehensive wastewater treatment and reuse of waste water treatment and reuse in the production unit of the steel industry.
Cheng, can be used as an environmental impact assessment for steel industry construction projects, environmental protection facilities design and construction, construction project completion environment
The technical basis for the protection and acceptance and operation and management after completion.
2 Normative references
The contents of this specification refer to the terms in the following documents. For undated references, the valid version applies to this
specification.
GB 12348 Environmental noise emission standards for industrial enterprises
GB 13456 Water Industry Pollutant Emission Standard
GB 16297 Integrated emission standards for atmospheric pollutants
GB 50013 Outdoor Water Supply Design Code
GB 50014 Outdoor Drainage Design Code
GB 50016 Building Design Fire Code
GB 50019 Heating, Ventilation and Air Conditioning Design Code
GB 50040 power machine basic design specification
GB 50050 industrial circulating cooling water treatment design specification
GB 50052 design specification for power distribution system
GB 50053 10kV and below substation design specifications
GB 50054 Low Voltage Distribution Design Specification
GB 50168 Electrical installation engineering Rotating electrical machine construction and acceptance specifications
GB 50194 Safety requirements for power supply at construction site
GB 50275 Compressor, fan, pump installation engineering construction and acceptance specifications
GB 50303 Building electrical engineering construction quality acceptance specification
GB 50335 Wastewater Recycling Engineering Design Specification
GB 50506 Steel Enterprise Water Saving Design Specification
GB 50672 Process design specification for comprehensive sewage treatment plant of iron and steel enterprises
GB J 22 Factory Mine Road Design Code
GB J 87 Industrial Enterprise Boundary Noise Control Design Specification
GBZ 1 industrial enterprise design hygiene standard
HJ/T 250 Environmental Protection Products Technical Requirements Rotary Fine Grille
HJ/T 251 environmental protection product technical requirements Roots blower
HJ/T 257 Environmental Protection Product Technical Requirements Electrolytic chlorine dioxide synergistic disinfectant generator
HJ/T 258 Environmental Protection Products Technical Requirements Electrolytic Sodium Hypochlorite Generator
HJ/T 262 environmental protection product technical requirements grille decontamination machine
HJ/T 272 Environmental Protection Products Technical Requirements Chemical Process Chlorine Dioxide Disinfectant Generator
HJ/T 279 environmental protection product technical requirements push flow submersible mixer
HJ/T 283 environmental protection product technical requirements vane filter and plate and frame filter
HJ/T 336 Environmental Protection Product Technical Requirements Submersible Sewage Pump
HJ/T 369 Environmental Protection Product Technical Requirements Dosing Device for Water Treatment
HJ/T 353 Water Pollution Source Online Monitoring System Installation Technical Specification (Trial)
HJ/T 354 water pollution source online monitoring system acceptance technical specification
Technical specification for operation and maintenance of HJ/T 355 wastewater online monitoring system
"Design Manual for Water Supply and Sewerage in the Iron and Steel Industry"
Measures for Completion and Acceptance of Construction Projects (Engineering) (National Planning Commission Construction [1990] No. 215)
Measures for the Administration of Environmental Protection Completion Acceptance of Construction Projects (Order No. 13 of the State Environmental Protection Administration)
3 Terms and definitions
The following terms and definitions apply to this specification.
3.1 waste water from iron and steel industry
Wastewater from various production units and auxiliary facilities in the steel industry.
3.2 waste water from the unit of iron and steel industry
Waste water produced by various production processes (such as raw materials, sintering, iron making, steel making, steel rolling, etc.) in the steel production process.
3.3 Synthetic sewage from iron and steel industry
Wastewater discharged and transported by the drainage system of the iron and steel enterprise plant.
3.4 concentrated salt-containing wastewater concentrated salt-containing wastewater
Industrial wastewater with a salt content greater than or equal to.2000 mg/L.
3.5 integrated clarifier all-in-one sediment tank
The special mud pump is used to promote the external circulation of the activated sludge in the pool, and the impurity particles in the sewage are in contact with the formed sludge.
Flocculation and separation, a combination of flocculation, clarification, sedimentation and residual mud enrichment.
4 Contaminants and pollution loads
4.1 Wastewater sources and major pollutants
The steel industry wastewater comes from the production process water, equipment and product cooling water, equipment and site cleaning water. Waste
Water contains raw materials, intermediates and products that are lost with water, as well as contaminants produced during production. Wastewater source
See Table 1 for major pollutants.
Table 1 Sources and main pollutants of steel industry wastewater
Production unit wastewater type source main pollutants and load
Raw material raw material field wastewater discharge dust removal, flushing floor SS
sintering
Flushing tape, floor wastewater
Rinse the mixing tape, rinse
Floor
SS concentration is generally 5000mg/L
Wet dust collector wastewater wet scrubber
Mainly SS, the concentration is generally 5000~10000mg/L,
Among them, TFe accounts for 40%~45%
Desulfurization waste liquid sintering machine flue gas desulfurization
pH. 4~6, SS, Cl-high, mercury, lead, arsenic, zinc, etc.
heavy metal ion
Ironmaking
Blast furnace gas washing wastewater
Blast furnace gas washing and purification system
System, pipe water seal
SS, COD, etc., containing a small amount of phenol, cyanide, Zn, Pb,
Sulphide and heat pollution. Where the SS concentration is
1000~5000mg/L, cyanide 0.1~10 mg/L, phenol
0.05~3 mg/L
Slag granulation wastewater treatment system
Mainly SS, concentration is 600~1500mg/L, cyanidation
0.002~1mg/L, phenol 0.01~0.08 mg/L
The cast iron machine spray cooling waste water cast iron machine is mainly SS, the concentration is 300~3500mg/L
Steel making
Converter flue gas wet dust removal wastewater wet dust collector
Unburned wastewater SS is mainly FeO, combustion wastewater
SS is mainly Fe2O3, and the SS concentration is generally
3000~20000mg/L
The refining device pumping and condensing wastewater refining device is mainly SS, and the concentration is 150~1000mg/L.
Continuous casting production wastewater
Two cold spray cooling, flame cutting
Cutting machine, slab steel slag granulation
Mainly SS, iron oxide, grease, SS concentration is
200~2000mg/L, oil 20~50mg/L
Flame cleaning machine waste flame cleaning machine, gas cleaning
Mainly SS, iron oxide, grease, SS concentration is
400~1500mg/L
Production unit wastewater type source main pollutants and load
Rolling steel
(hot rolling)
Hot rolling production wastewater
Roller support roller, coiler,
Descaling, roller conveyor, etc.
Iron sheet
Mainly iron oxide scale, grease, SS concentration is
200~4000mg/L, oil 20~50mg/L
Rolling steel
(cold rolling)
Cold rolling acid-base wastewater pickling line, rolling line acid, alkali
Cold rolling oil and emulsion wastewater
Cold rolling mill, grinding roller, belt
Steel degreasing unit and oil depot
Lubricating oil and hydraulic oil
Cold rolling chromium-containing wastewater
Hot-dip galvanizing unit, electro-galvanizing,
Electroplating tin and other units
Heavy metal ions such as chromium, zinc and lead
Self-provided power plant high-salt wastewater
Desalting station backwashing or softening station
Regeneration drainage
Acid and alkali
4.2 Wastewater volume and pollution load
4.2.1 The amount of wastewater produced in the steel production unit shall be determined as follows.
a) New steel enterprises should be calculated according to the water quality and water quality balance of each production unit, and determined by analogy verification;
b) The steel enterprises that are to be rebuilt or expanded shall be determined according to the measured data of the measuring instruments set in the water supply and drainage system of each production unit;
c) When there is no meter, it can be based on similar product varieties, production process, production scale, work system and management water
The flat business analogy is ok.
4.2.2 The amount of water in the integrated sewage of the steel industry shall be calculated based on the sum of the displacements of the drains.
4.2.3 The pollution load of the steel production unit wastewater can be calculated according to the wastewater discharge amount and pollutant concentration of the corresponding production unit.
Estimation; the pollution load of the integrated sewage can be estimated based on continuous sampling on site or based on the water quality of the drainage system.
5 General requirements
5.1 General provisions
5.1.1 In addition to complying with this standard, the steel industry wastewater treatment and reuse engineering technology should also comply with the relevant national standards.
And the provisions of the specification.
5.1.2 Steel industry wastewater treatment and reuse project should be rationally matched with the overall planning and production process of iron and steel enterprise production development
The set adopts high-efficiency, safe and reliable treatment process to ensure the water safety of the enterprise.
5.1.3 Steel industry wastewater treatment and reuse projects shall be controlled in accordance with the principle of cleaner production, and shall be controlled by the following
Three important aspects of organic composition. the use of technology to reduce or eliminate pollutants entering the water at the source of production units;
An effective circulating water treatment system; the end of the total discharge sewage treatment and reuse.
5.1.4 Steel industry wastewater treatment and reuse projects should be equipped with relevant online testing instruments to ensure the safety of wastewater treatment systems
Reliable, continuous and stable operation.
5.1.5 The waste water of each production unit of the iron and steel enterprise shall be recycled after being collected and treated. Raw material field, sintering and iron making in new enterprises
The production unit should be substantially free of waste water.
5.1.6 Iron and steel enterprises should construct integrated sewage treatment facilities, and collect and treat the integrated sewage to meet the user's water quality requirements.
For use, the external drainage should meet the requirements of GB 13456.
5.1.7 The external discharge outlets of iron and steel enterprises shall be equipped with on-line monitoring devices for pollution sources, and in accordance with the national technical regulations on pollution source monitoring.
Regulations are enforced.
5.2 Project composition
5.2.1 The main body of wastewater treatment and reuse of steel production unit is mainly composed of circulating water treatment, wastewater treatment, cascade water supply, etc.
Body technology and supporting auxiliary facilities.
5.2.2 The integrated sewage treatment facility consists of a pretreatment process, a main process and ancillary auxiliary works.
5.3 Site selection
5.3.1 The site selection of wastewater treatment and reuse projects shall be in accordance with the overall planning of the iron and steel enterprise and the professional design requirements for water supply and drainage.
5.3.2 The site selection of integrated sewage treatment facilities shall comply with the provisions of GB 50672.
5.4 General layout
5.4.1 The general layout should consider the requirements of the process flow and the site conditions, and follow the principle of saving land, so that the general plan
The layout is compact and the pipe distance is as short as possible.
5.4.2 The vertical design of the process should be designed to reduce energy consumption, reduce the number of lifts, and reduce the smooth drainage.
Small head loss.
5.4.3 The dosing room and sludge treatment room should be placed in relatively independent areas and close to the road.
5.4.4 The setting of roads in the factory area shall meet the requirements for transportation, fire protection, greening and laying of various pipelines.
6 Process design
6.1 General requirements
6.1.1 The choice of wastewater treatment process should be based on the requirements of wastewater quality and post-treatment water quality,
Under the premise of meeting the discharge standards, we will choose a mature and advanced, stable and economically reasonable technical route to achieve recycling as much as possible.
6.1.2 The design of the wastewater treatment process should consider that any structure or equipment can still guarantee output when it is shut down due to maintenance and cleaning.
Meet the production requirements of qualified water quality and water requirements.
6.2 Wastewater collection facilities
6.2.1 The collection of wastewater from steel production units shall be carried out by means of a “drainage and diversion” diversion system, which shall be collected and treated separately.
Reuse.
6.2.2 Exhaust wastewater from each production unit (except cold-rolled wastewater and concentrated salt wastewater) shall be collected and transported through the drainage system of the plant.
Send it to the integrated sewage treatment facility for disposal.
6.3 Wastewater treatment and reuse of production units
6.3.1 The wastewater of the production unit shall follow the principle of multi-purpose and comprehensive utilization of water, and be combined with the overall circulating water system of the enterprise.
Form a complete large-circulation system for water-saving wastewater treatment and reuse.
6.3.2 The wastewater discharged from each production unit shall be collected by the drainage system of the plant and transported to the integrated sewage treatment facility for treatment.
6.3.3 The raw material field wastewater is reused after precipitation treatment.
6.3.4 Sintering plant wastewater is recycled after being treated by precipitation or concentration.
Figure 1 Sintering plant wastewater treatment process flow chart
6.3.5 The following treatment processes should be adopted for the waste water of the ironworks.
a) Blast furnace gas washing wastewater should be recycled after using the process shown in Figure 2. Circulating water system forced drainage
As a supplement to the blast furnace slag system.
Figure 2 Flow chart of the treatment process of blast furnace gas washing wastewater
Hydrating flocculant
Gas washing wastewater flocculation sedimentation cooling circulating pool blast furnace slag hydration
(The residual pressure power generation is not set)
Supernatant
Recycling or concentrating wastewater from sinter plant
Sludge recovery
Circulating pool
b) The blast furnace slag wastewater should be recycled after using the process shown in Figure 3~6.
Fig. 3 Flow chart of blast furnace slag wastewater treatment process--precipitation filtration method
Figure 4 Flow chart of blast furnace slag wastewater treatment process--filtration method
Fig. 5 Flow chart of blast furnace slag wastewater treatment process--drum filtration method
Fig.6 Flow chart of blast furnace slag wastewater treatment process--drum dehydration method
c) Cast iron machine ingot spray cooling wastewater should be recycled after the treatment process shown in Figure 7.
Figure 7 Flow chart of the treatment process of spray cooling wastewater in cast iron machine
6.3.6 The following treatment processes should be adopted for steel mill wastewater.
a) The converter flue gas wet purification dust removal wastewater should be recycled after using the process shown in Figure 8. Small amount of circulating water system
The forced discharge of sewage can be used as blast furnace slag, steel slag treatment, cascade water for raw material field or discharge into integrated sewage treatment facilities. Force
The sewage discharge SS≤100mg/L, and the water temperature≤35°C.
Slag slag water mixture drum dewatering (belt slag) cooling circulation pool
Hydration
Slag slag water mixture drum filtration (belt slag) cooling
Hydration
Circulating pool
Slag slag water mixture filtration (grab slag) cooling
Hydration
Circulating pool
Cast iron machine sedimentation (grab clearing slag)
Slag slag water mixture precipitation filtration (grab clearing slag) circulating pool
Hydration
Figure 8 Flow chart of the treatment process of converter flue gas wet dust removal wastewater
b) The molten condensate from the molten steel refining unit should be recycled after using the process shown in Figure 9 or Figure 10. Small loop
The water system is forced to discharge sewage into the integrated sewage treatment facility. The SS of the forced sewage is ≤100mg/L, and the water temperature is ≤35°C.
Fig. 9 Flow chart of the process of extracting condensed wastewater from refining unit--precipitation filtration method
Figure 10 Flow chart of the treatment process of the extraction and condensation wastewater of the refining unit--Direct filtration method
c) Continuous casting production wastewater should be recycled after using the process shown in Figure 11. Small amount of circulating water system forced sewage
Discharge into integrated sewage treatment facilities. The SS is ≤30mg/L, the oil is ≤5mg/L, and the water temperature is ≤35°C.
Figure 11 Flow chart of continuous casting production wastewater treatment process
6.3.7 The production unit wastewater of the rolling mill is divided into two types. hot rolling production wastewater and cold rolling production wastewater by different rolling processes.
Different water treatment processes are used for treatment.
Forced sewage
Pumping condenser wastewater cooling circulating tank filtration
Mud treatment system integrated sewage treatment facility mud cake transportation
Forced sewage
Secondary precipitation filtration of each water point cooling circulating pool
Mud treatment system
Primary precipitation
Integrated sewage treatment facility
Mud cake
Forced sewage
Pumping condenser wastewater cooling circulating tank precipitation filtration
Mud treatment system integrated sewage treatment facility mud cake transportation
Forced sewage
Flue gas purification dust removal wastewater sedimentation circulating pool
Mud treatment system
Coarse particle separation
Hydration
cool down
Cascade water or discharge into integrated sewage treatment facilities
Mud cake
Hydration
Hydration
Hydration
a) The wastewater of the production unit of the hot rolling mill is mainly the direct cooling water drainage of steel rolling mills such as steel plates, steel pipes, steel sections and wire rods.
The wastewater should be recycled after treatment with the process shown in Figure 12, Figure 13, and Figure 14. A small amount of system is forced to discharge sewage to the integrated sewage.
Water treatment facility. The SS is ≤30mg/L, the oil is ≤5mg/L, and the water temperature is ≤35°C.
Figure 12 Flow chart of hot rolling direct cooling water treatment process
Figure 13 Flow chart of hot-rolled laminar cooling water treatment process
Figure 14 Flow chart of quenching wastewater treatment process
b) There are many types of wastewater in the production unit of cold rolling mill, including acid-base wastewater, oil and emulsion wastewater, and chromium-containing wastewater.
It should be processed separately by each processing system. The treated oily and emulsion wastewater and chromium-containing wastewater are discharged into the acid-base wastewater treatment system.
After processing, it will reach the standard.
(1) The treatment of acid-base wastewater should be treated by the process shown in Figure 15.
Mud treatment system
Quenching unit water tower sedimentation regulating tank
Mud cake
Neutralizer neutralizer
Oil and emulsion wastewater after treatment
Acid-base wastewater primary neutralization clarification secondary neutralization clarification
Mud treatment system
Regulating pool aeration
Aeration pH adjustment up to standard
Treated chromium-containing wastewater
Mud cake
Forced sewage
Mud treatment system
Direct cooling
Water drainage, cooling, circulating pool, secondary precipitation, filtration, primary precipitation
Integrated sewage treatment facility
Forced sewage
Laminar cooling, drainage, iron deposit, filtration, cooling, circulating pool
Mud treatment system mud cake outbound comprehensive sewage treatment facility
Hydration
Hydration
Hydration
Figure 15 Flow chart of cold rolling acid-base wastewater treatment process
(2) The treatment process of oil and emulsion wastewater should be as shown in Figure 16 or Figure 17.
Figure 16 Flow chart of cold rolling oil and emulsion wastewater treatment process--Air floatation method
Figure 17 Flow chart of cold rolling oil and emulsion wastewater treatment process--MBR method
(3) The chromium-containing wastewater should be treated with the process shown in Figure 18, adjusted, two-stage reduction, and the Cr6 < 0.5mg/L in the effluent.
After adjusting the pH, it is sent to the acid-base wastewater treatment system.
Figure 18 Flow chart of cold rolling chromium-containing wastewater treatment process
6.3.8 Steel unit The main unit of wastewater treatment mainly includes. sedimentation, filtration, cooling, etc.
6.3.8.1 Steel production unit Wastewater treatment Precipitation process Commonly used treatment structures are advection sedimentation tanks, swirling sedimentation
A pond, a radiation sedimentation tank, a sloping plate precipitator, a chemical degreaser, and the like.
Primary reduction pool of chromium-containing wastewate...
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