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HJ 2051-2016

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HJ 2051-2016English599 Add to Cart Days<=5 Technical specification for wastewater treatment project of caustic alkali and polyvinyl chloride industry Valid HJ 2051-2016
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Detail Information of HJ 2051-2016; HJ2051-2016
Description (Translated English): Technical specification for wastewater treatment project of caustic alkali and polyvinyl chloride industry
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: Z23
Word Count Estimation: 26,297
Date of Issue: 2016-02-01
Date of Implementation: 2016-03-01
Quoted Standard: GB 12348; GB 14554; GB 15562.2; GB 15581; GB 18071.1; GB 18484; GB 18597; GB 18599; GB 50014; GB 50015; GB 50016; GB 50019; GB 50046; GB 50055; GB 50093; GB 50187; GB 50194; GB 50231; GB 50236; GB 50254; GB 50255; GB 50256; GB 50268; GB 50275; GB 50483; GB/T 16483; GB/T 50335; GB/T
Drafting Organization: China Environmental Protection Industry Association
Administrative Organization: Ministry of Environmental Protection
Regulation (derived from): ?Ministry of Environment Protection Bulletin 2016 No.9

HJ 2051-2016
Technical specification for wastewater treatment project of caustic alkali and polyvinyl chloride industry
National Environmental Protection Standard of the People 's Republic of China
Caustic soda, polyvinyl chloride industrial wastewater treatment engineering technical specifications
Technical specification for wastewater treatment project of caustic
Polyvinyl chloride industry
2016-2-1 release
2016-3-1 implementation
Ministry of Environmental Protection released
Directory
Preface
1 Scope of application
2 normative reference documents
3 terms and definitions
4 Wastewater and water quality
5 General requirements
6 process design
7 Major process equipment and materials
Detection and Process Control
Major auxiliary works
10 Labor safety and occupational health
Construction and Acceptance
12 Operation and Maintenance
Appendix A (informative) Internal recycling process
Appendix B (informative) caustic soda, PVC main production of fouling nodes Figure 27
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 Water Pollution,
Vanadium, PVC industrial wastewater treatment project construction and operation management, prevention and control of environmental pollution, environmental protection and human health
Kang, the development of this standard.
This standard specifies the technology of caustic soda and polyvinyl chloride industrial wastewater treatment engineering design, construction, acceptance, operation and maintenance
Claim.
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 of this standard. China Environmental Protection Industry Association, Hao Lan Environmental Protection Co., Ltd., China Chlor-Alkali Industry
association.
This standard is approved by the Ministry of Environmental Protection on February 1,.2016.
This standard has been implemented since March 1,.2016.
This standard is explained by the Ministry of Environmental Protection.
Caustic soda, polyvinyl chloride industrial wastewater treatment engineering technical specifications
1 Scope of application
This standard specifies the technology of caustic soda and polyvinyl chloride industrial wastewater treatment engineering design, construction, acceptance, operation and maintenance
Claim.
This standard applies to caustic soda, polyvinyl chloride as the main products of enterprises caustic soda, PVC industrial wastewater treatment works,
Can be used as caustic soda, PVC environmental construction project environmental impact assessment, environmental protection facilities design and construction, construction projects
Engineering, environmental protection acceptance and operation and management of the technical basis.
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.
Standard for Environmental Noise Discharge of Industrial Enterprises
Emission standard for odorous pollutants GB 14554
GB 15562.2 Environmental protection graphic markings Solid waste storage (disposal) field
GB 15581 caustic soda, PVC industrial water pollutant discharge standards
Basic chemical raw materials - Health protection distances - Part 1. Caustic soda manufacturing
Standard for Pollution Control of Hazardous Waste Incineration
Standard for Hazardous Waste Storage Pollution Control
Standard for Pollution Control of Storage and Disposal Site for General Industrial Solid Waste
Code for design of outdoor drainage
Code for design of building water supply and drainage
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 power distribution for general purpose electrical equipment GB 50055
Code for construction and acceptance of automatic instrumentation GB 50093
Specification for general graphic design of industrial enterprises GB 50187
GB 50194 Construction engineering site for the use of electricity safety regulations
General specification for construction and acceptance of mechanical equipment installation works GB 50231
Code for construction of welding equipment for field equipment and industrial piping GB 50236
Code for construction and acceptance of low - voltage electrical appliances GB 50254 electrical installations
Code for construction and acceptance of electric power converter equipment for installation of electrical installations GB 50255
Code for construction and acceptance of electrical installations for electrical installations of GB 50256 electrical installations
Code for construction and acceptance of water supply and sewerage in GB 50268
Specification for Construction and Acceptance of Compressor, Fan, Pump Installation
Code for design of environmental protection for chemical construction projects GB 50483
GB/T 16483 SAFETY DATA SHEET Contents AND PROJECT STATE
Code for design of wastewater reuse project GB/T
Technical code for seepage prevention of petrochemical engineering GB/T
Code for construction and acceptance of water supply and drainage structures GB 50141
Code for design of CECS97 blast aeration system
Code for design of sewage activated sludge process in cold area of CECS111
Code for design of CECS128 biological contact oxidation
Technical specification for operation, maintenance and safety of CJJ60 city sewage treatment plant
Standard for Design of Chemical Hazardous Waste Landfill on HG/T 20504
Technical requirements for environmental protection products - Belt press filters for sludge dewatering
HJ/T 251 Environmental protection products - Technical requirements Roots blowers
HJ/T 252 environmental protection products in the technical requirements, microporous aerator
Technical requirements for environmental protection products - Pressure dissolved air flotation devices
Technical requirements for environmental protection products
HJ/T 265 Technical requirements for environmental protection products
HJ/T 277 Environmental protection products - Technical requirements Rotary decanter
Technical requirements for environmental protection products push - flow diving mixer
HJ/T 283 Environmental protection products Technical requirements Van filter press and plate and frame filter press
HJ/T 336 Environmental protection products Technical requirements Diving sewage pump
Technical requirements for environmental protection products - Dosing devices for water treatment
Technical specification for anaerobic - anoxic - aerobic activated sludge process
Technical Specification for Sequencing Batch Activated Sludge Wastewater Treatment Engineering
"Technical Standard for Hygienic Quality of Sodium Hypochlorite Disinfectant" (Wei Guan Fa [2007] No. 265)
"Construction project (project) completion and acceptance method" (construction construction [1990] 1215)
Measures for the Administration of Acceptance of Environmental Protection for Completion of Construction Projects (State Environmental Protection Administration Decree No. 13)
3 terms and definitions
The following terms and definitions apply to this standard.
3.1 ion membrane electrolysis ion exchange membrane cell electrolysis process
Refers to the salt water as raw material using ion-exchange membrane electrolytic cell production caustic soda, chlorine and hydrogen production process.
3.2 ethylene oxychlorination process
Refers to the ethylene as raw material using ethylene oxychloride production of PVC production process.
3.3 calcium carbide acetylene method carbide-acetylene process
Refers to calcium carbide, chlorine and hydrogen as raw materials to produce PVC production process.
3.4 reactive chlorine waste water
Refers to the production of caustic soda process, chlorine purification process in the chlorine gas scrubber generated wastewater.
3.5 vinyl chloride waste water
Refers to the production of PVC process, the polymerization reactor and slurry stripping tower section of the waste water, including the reactor water, coating
Water, stripping tower condensate and so on.
3.6 mercury-containing waste water mercury-containing waste water
Refers to acetylene as raw material for the production of PVC process, the use of mercuric chloride catalyst catalytic synthesis of vinyl chloride process of alkaline
Waste water, acid waste water, mercury transfer catalyst waste water and workshop floor flushing water.
3.7 nickel containing waste water nickel containing waste water
Refers to the production of caustic soda process, salt secondary refining of chelating resin regeneration tower produced in the regeneration of wastewater.
Salt mud washing and filter pressing water
Refers to the production of caustic soda salt washing and filtration process of waste water.
3.9 carbide slag waste water-slag waste water
Refers to the use of calcium carbide production process of acetylene, acetylene occurred in the process of carbide slurry after separation of the supernatant.
3.10 sodium hypochlorite waste water
Refers to the production of PVC process, the use of sodium hypochlorite solution purification of acetylene gas generated when the waste water.
3.11 PVC centrifugal mother liquid of polyvinyl chloride
Refers to the suspension polymerization process in the polymerization of polyvinyl chloride after the end of the slurry into the centrifugal unit for solid-liquid separation after the discharge
Waste water.
3.12 Polyvinyl chloride centrifugal mother liquor effluent efflux of centrifugal mother liquid of polyvinyl chloride
Refers to the suspension polymerization process of PVC centrifugal mother liquor by recycling device for recycling, the recovery of waste water
Wait.
3.11 internal circulation process
Refers to the production unit of waste water generated in the workshop to achieve the production process to return to the water after the standard
recycle.
4 Wastewater water and water quality
4.1 Wastewater sources and classification
A) Inorganic wastewater
Production of caustic soda by ion-exchange membrane and the production of polyvinyl chloride and other products using calcium carbide
Machine wastewater, including the electrolysis section of the washing tank, alkali-producing section of the evaporation of condensate and alkaline washing water, acid-producing section of acidic water,
Machine cooling water, circulating water plant sewage, the main pollutants for the acid, alkali, salt and other inorganic.
B) organic wastewater
1) the use of ethylene oxychlorination process to produce PVC and other products in the process of organic wastewater, including oxygen chloride
The acid and alkali waste water produced by the reaction unit, the waste water after washing the exhaust gas, the waste water produced by the dichloride dehydration tower, the ground sewage,
Coke water and accident washing tower wastewater, centrifugal section without the internal recycling of centrifugal mother liquor and centrifugal mother liquor outside the drainage, the waste
Water BOD5/COD is generally less than 0.3.
2) the use of calcium carbide acetylene production of PVC and other products in the process of organic wastewater generated, including the centrifugal section
Without the internal recycling of centrifugal mother liquor and centrifugal mother liquor outside the drainage, the waste water BOD5/COD is generally less than 0.3.
C) Reactive chlorine wastewater
Ion-exchange membrane production of caustic soda, chlorine gas purification process in the chlorine scrubber generated wastewater, the main pollutants are effective
Chlorine and so on.
D) Vinyl chloride wastewater
Production of PVC process, the polymerization reactor produced by the reactor water, coated water and slurry stripping tower condensate, etc.
Contaminants are vinyl chloride, organic matter and so on.
E) Mercury containing wastewater
The use of calcium carbide acetylene production of PVC products such as the process of mercury-containing wastewater, mainly from mercury catalyst synthesis of chlorine
Ethylene water caustic washing process and mercury-containing acidic wastewater generated after the analysis of acidic wastewater, the main pollutants such as mercury, salt, mercury content
About 0.05 mg/L to 1 mg/L.
F) Nickel-containing wastewater
Ion-exchange membrane electrolysis production of caustic soda, salt secondary refining of chelate resin regeneration tower produced in the regeneration of wastewater, the main pollution
Things are nickel, salt and so on.
G) salt mud washing water, pressure filtration water
Ion-exchange membrane production of caustic soda, salt mud washing and filtration process of waste water, the main pollutants for the acid, alkali, salt,
Soluble solids and suspended solids.
H) carbide slag wastewater
In the process of producing polyvinyl chloride products using calcium carbide acetylene, the carbide slag is separated from the supernatant, including the production
Acetylene process, the hydrolysis of calcium carbide generated when the wastewater, the main pollutants are alkali, suspended solids, sulfides, phosphides and so on.
I) sodium hypochlorite wastewater
The use of calcium carbide acetylene acetylene production process, in the acetylene purification section using sodium hypochlorite solution purification B
Acetylene gas generated when the main pollutants for the acetylene, sulfide and phosphide and so on.
J) Polyvinyl chloride centrifuged mother liquor
The use of suspension polymerization process to produce PVC and other products in the process of producing PVC centrifugal mother liquor, including suspension
Float polymerization process in the polymerization of polyvinyl chloride after the end of the slurry into the centrifugal unit for solid-liquid separation after the discharge of the mother liquor waste
Water, centrifugal mother liquor device flushing water, the main pollutants for a small amount of PVC particles, the polymerization process to join the additives and residues
Reactants and the like.
4.2 Wastewater water
4.2.1 The new project waste water discharge can be calculated by the formula (1) and (2) or (1) and (3) calculated, also need to meet
The relevant provisions of the standard.
QY = Qi Qj (1)
Qi = Σqi (1 - α) (2)
Qi = βQ (3)
Where. QY - integrated wastewater, m3/t;
Qi - Production waste water, m3/t;
Qj - other waste water, m3/t, including ground flushing water, the factory early rain, etc., should refer to GB 50015
And other criteria;
Qi - the amount of waste water in each production process, m3/t, should be determined according to the water balance chart;
Q - production of water, m3/t, can be determined according to the production of water quota;
Α - wastewater reuse rate,%, that is, the ratio of waste water and waste water production should be based on the actual wastewater
Determine with the situation or water balance chart;
The reduction factor of the displacement calculated by the feed water should be determined according to the production process and the level of the water supply and drainage facilities
And other factors to determine, generally take 30% to 50%.
4.2.2 The existing project wastewater discharge should be based on measured data to determine. If you do not have the field measurement conditions, can be compared with the original
Material, with the scale of the actual production line of wastewater discharge data; no analogy data, according to the production workshop (line) total water consumption
30% to 50% estimate of wastewater discharge.
4.3 Wastewater quality
4.3.1 For new or expanded projects, the quality of waste water can be determined by reference to the actual operation data of similar enterprises.
4.3.2 Wastewater quality can be measured by the weighted average of the measured data, the sampling location should be located in the workshop drain. Measured number
According to the production cycle and production characteristics to determine the frequency of monitoring, and each production cycle shall not be less than 3 times. There is no measured conditions,
Refer to Table 1 for data.
Table 1 Wastewater quality
Contaminants
index
Type of waste water
CODCr
(Mg/L)
BOD5
(Mg/L)
SS
(Mg/L)
Total phosphorus
(Mg/L)
chloride
(Mg/L)
Sulfide
(Mg/L)
Active chlorine
(Mg/L)
Vinyl chloride
(Mg/L)
Total mercury
(Mg/L)
Total nickel
(Mg/L)
PH
Inorganic Wastewater 20 ~ 100 - 60 ~ 250 - 1000 ~.2000 - - - - -
5 ~
Organic wastewater 150 ~ 250 20 ~ 60 35 ~ 150 - ≤ 350 - - - - - 6 ~ 8
Active chlorine waste
- - - - - -
≤ 6000
- - - -
Vinyl chloride waste
≤1500 - - - - - - ≤700 - - -
Mercury wastewater 80 ~ 100 30 ~ 40 60 ~ 80 - 600 ~ 1200 - - 1 ~ 5 0.5 ~ 1 - 5 ~ 9
Nickel-containing wastewater - - - - - - - - - ≤0.5 -
Salt mud washing
Water, pressure water
50 ~ 100 - 50 ~ 100 - ≤2000 - - - - - -
Carbide slag waste
1200 ~
- 150 ~.200 30 ~ 80 ≤3000 300 ~ 500 - - - -
10 ~
Sodium hypochlorite
Waste water
600 ~ 800 - 10 ~ 30 ≤1000 ≤3000 20 ~ 100 - - - - 3 ~ 5
Polyvinyl chloride
Centrifuge mother liquor
100 to 450 40 to 100 90 to 350 to 20 to 40 ≤ 10 -
0.001 ~
0.5
- - 6 ~ 9
4.3.3 Wastewater discharge after discharge or reuse water quality should be consistent with national and local standards.
5 General requirements
5.1 General provisions
5.1.1 To deal with the production, treatment and discharge of wastewater, the whole process of control, the use of cleaner production and recycling technology to improve
Resources, energy efficiency, reduce waste water pollution load.
5.1.2 Wastewater treatment should adopt the principle of cleaning and diversion, rain and sewage diversion, sewage division and division, quality and quality reuse.
5.1.3 Wastewater treatment works shall comply with the requirements of the environmental impact assessment document, follow the "three simultaneous" system, and the enterprise
Production and development planning as the basis, integrated wastewater treatment and centralized treatment, the existing works and the new (expansion, change) construction
The relationship of the process.
5.1.4 Wastewater treatment works in the construction and operation, should take anti-noise, earthquake and other measures to deal with facilities in the explosion-proof area
Explosion protection measures should be taken.
5.1.5 Wastewater treatment works should be set up standardized sewage outfall, sewage outfall settings and pollutant emissions should be consistent with environmental impact assessment and
Its approval documents and the relevant emission standards.
5.1.6 Materials, pharmaceuticals, sludge, waste residue, etc. should not be piled up, storage places should take the appropriate anti-corrosion, anti-seepage and other measures,
Prevention and control of secondary pollution, disposal facilities, odor, noise and other pollutant emissions should meet GB 14554, GB 12348 and
GB 50483 and other relevant standards.
5.1.7 Wastewater treatment engineering design, in addition to compliance with this standard and environmental impact assessment and its approval documents, but also should meet
National capital construction procedures and relevant standards, and regulatory requirements.
5.2 source control and clean production
5.2.1 The use of advanced production technology and equipment, strict management, comprehensive utilization, from the source to reduce pollution, improve resource utilization
With the efficiency, reduce or avoid the production process of pollutant generation and emissions.
5.2.2 The use of water balance analysis, optimize the water program, strengthen water conservation measures to reduce the generation of waste water.
5.2.3 Wastewater treatment after the need to use according to water requirements, should adopt the following ways.
A) salt mud washing water, pressure filter water, carbide slag wastewater, sodium hypochlorite wastewater, polyvinyl chloride centrifugal mother liquor after treatment
Can be used for production, reuse treatment process and the way see Appendix A;
B) Inorganic wastewater, organic wastewater, reactive chlorine wastewater, vinyl chloride wastewater, mercury-containing wastewater and nickel-containing wastewater after treatment
Priority should be given to reuse, discharge must be discharged when discharged.
5.3 Construction scale
5.3.1 The scale of construction shall be determined on the basis of the existing water, water quality and expected changes in the scope of the wastewater treatment works;
Existing enterprises should be based on measured data, there is no measured data, can refer to the same type of business situation, the new (expansion, change)
Construction enterprises should be based on analog or material accounting method to determine.
5.3.2 The determination of the construction scale of the wastewater treatment project should meet the following requirements.
A) grille and other adjustment pool before the wastewater treatment structure according to the maximum daily flow meter;
B) the control tank and the subsequent waste water treatment structure according to the maximum daily average flow meter;
C) Water treatment system Based on water quality, water and reuse of recycled water, water balance and technical and economic analysis
After the determination;
D) sludge treatment and disposal system according to the maximum daily production mud.
5.4 Project composition
5.4.1 Wastewater treatment works by the main project, auxiliary engineering and supporting facilities and other components.
5.4.2 The main project includes waste water collection, accident pool, primary treatment, primary strengthening treatment, secondary treatment, depth (reuse)
Treatment, waste gas treatment, sludge treatment and disposal units.
5.4.3 auxiliary works, including electrical, automatic control, water supply and drainage and fire, heating and ventilation.
5.4.4 supporting facilities, including plant roads, office space, green and so on.
5.5 Site selection and overall layout
5.5.1 Wastewater treatment works Site selection and overall layout should be included in the overall planning to meet the project environmental impact assessment and its
Approval of document requirements.
5.5.2 Site selection, flat and vertical design, piping and greening layout shall be determined according to the composition of the project.
GB 50014, GB 50187 and related standards.
5.5.3 site selection should be close to the production workshop, waste water should be used to enter the waste water treatment project.
5.5.4 The overall arrangement shall be based on the functions and processing requirements of each building in the processing area, combined with the site topography,
Geological, climatic conditions, fire, explosion, health protection distance and other factors, the technical economy after the comprehensive comparison, and meet
The following requirements.
A) The spacing of the building facilities should be compact and reasonable, and meet the requirements of construction and installation; the pipeline should be short
Easy to operate, repair and manage;
B) vertical design of buildings and facilities should make full use of terrain and geological conditions;
C) the project area ground elevation should consider setting up flood control facilities, the treated wastewater has good discharge conditions;
D) reasonable layout beyond the pipeline and maintenance of venting facilities.
6 process design
6.1 General requirements
6.1.1 Priority should be given to the use of highly efficient and energy-efficient processes to ensure that the wastewater treatment facility is stable, reliable and safe
run.
6.1.2 Wastewater containing contaminants that require monitoring of the discharge in the workshop or production plant should be collected separately and treated separately.
6.1.3 The biochemical treatment unit should be designed in parallel with two series, the wastewater treatment process design should meet the relevant standards.
6.2 Wastewater collection
6.2.1 Wastewater collection should be based on the characteristics of wastewater, according to inorganic wastewater, organic wastewater, active chlorine wastewater, vinyl chloride wastewater, containing
Mercury wastewater and nickel-containing wastewater are set separately.
6.2.2 Production of caustic soda plant waste should be collected according to the following requirements.
A) production of caustic soda plant alkali-producing section and liquid chlorine section, acid production section of the waste water and workshop ground washed water
Have their own pipes into the inorganic waste water collection pool;
B) chlorine treatment station chlorine gas scrubber generated by the waste water should be discharged through a dedicated pipeline to the active chlorine wastewater collection pool;
C) salt secondary refining chelate resin regeneration of renewable waste water should be discharged through a dedicated pipe into the nickel-containing wastewater collection pool.
6.2.3 The use of ethylene oxychloride production of PVC and other products of the workshop waste should be collected according to the following requirements.
A) ethylene oxychloride production process of vinyl chloride section of the waste water should be discharged through the pipeline into the organic wastewater collection pool;
B) Coated water and flushing kettle in the polymerization section and the condensate of the slurry stripper shall be discharged into the vinyl chloride waste through a dedicated pipe
Water collection pool;
C) PVC centrifugal mother liquor drainage should be discharged through the pipeline into the organic wastewater collection pool;
D) centrifugal section without the internal recycling of centrifugal mother liquor should be discharged through the pipeline into the organic wastewater collection pool.
6.2.4 The use of calcium carbide method of production of polyvinyl chloride and other products of the workshop waste should be collected according to the following requirements.
A) the polymerization section of the coated water and flushing kettle water and slurry stripper condensate should be discharged through a dedicated pipe into the vinyl chloride waste
Water collection pool;
B) PVC centrifugal mother liquor drainage should be discharged through the pipeline into the organic wastewater collection pool;
C) centrifuge section without the internal recycling of centrifugal mother liquor should be discharged through the pipeline into the organic wastewater collection pool;
D) Calcium oxide produced by calcium carbide method The mercury-containing wastewater produced by the vinyl chloride section of PVC production should be discharged into the mercury-
Water collection pool.
6.2.5 Other plant waste water and rainwater should be collected as follows.
A) supporting the boiler, calcium carbide workshop flue gas generated by the washing cycle of waste water should be through the pipeline, into the organic wastewater collection pool;
B) recirculating water in the treatment of backwash water should be discharged through the pipeline into the inorganic waste water collection pool;
C) pure water preparation workshop waste water should be discharged through the pipeline into the inorganic waste water collection pool;
D) The initial rainwater within the area of the carbide slag should be collected into a separate rainwater catchment and discharged into the carbide slag
Processing device processing;
E) sodium hypochlorite wastewater should be collected separately through the pipeline into the sodium hypochlorite wastewater treatment device;
F) The initial rainwater harvesting system in the plant area shall be planned, designed and constructed by the production enterprise,
Wastewater treatment system.
6.2.6 According to the location and elevation conditions of the waste water collection tank, all kinds of waste water should be discharged into the corresponding wastewater by pressure flow or gravity flow
Processing works.
6.2.7 The event pool shall be set as follows.
A) Wastewater treatment works should be set up accident pool, when the waste water classification treatment of the accident pool should be inorganic wastewater, organic wastewater, live
Chlorine wastewater, vinyl chloride wastewater, mercury-containing wastewater and nickel-containing wastewater are set separately;
B) Inorganic wastewater accident pool volume should be 8h ~ 12h average flow meter;
C) organic wastewater, active chlorine wastewater accident pool volume should be 12h ~ 24h average flow meter;
D) Vinyl chloride wastewater, nickel-containing wastewater, mercury-containing wastewater accident pool capacity should be based on a maximum emissions.
6.3 Route selection
6.3.1 caustic soda, PVC wastewater in the inorganic wastewater, organic wastewater, mercury-containing wastewater treatment process shown in Figure 1; active chlorine
Wastewater, vinyl chloride wastewater and nickel-containing wastewater treatment process should be based on the quality of wastewater treatment enterprises to determine, when not try
When the conditions are met, refer to Scheme 2.
Depth (reuse) processing
not to standard
Containing mercury sawdust/containing
Mercury activated carbon
Organic wastewater
Reuse
Level 1 processing
Reuse processing
Level intensive processing
Discharge
Sludge treatment sludge treatment
First level to deal with a level of intensive processing
Sludge treatment
Inorganic wastewater
The barrel is sealed by a dangerous solid
Waste disposal of qualified enterprises to recover
Containing mercury sludge
Sludge sludge sludge sludge dewatering
Regulating pool pool mercury reactor
Adsorption, filtration,
Resin exchange group
Combined process
Water quality supervision
Bath containing mercury wastewater
Depth processing
filtrate
Discharge
Or reuse
Option One
Option II
Sinotrans
Figure 1 Roadmap for inorganic wastewater, organic wastewater and mercury-containing wastewater treatment processes
Discharge
Or reuse
reducing agent
Adjust the pool of stripping tower of vinyl chloride wastewater
Regulating pool reaction pool active chlorine wastewater discharge standards
Or reuse
Nickel - containing wastewater
Vinyl chloride standards
To organic wastewater
not to standard
Water quality monitoring pool
Water quality monitoring pool
not to standard
Chemical softening regulation pool water quality monitoring pool
Concentrated water
not to standard
Vinyl chloride recovery
Nanofiltration ultrafiltration
Softener
sludge
Figure 2 Roadmap of active chlorine wastewater, vinyl chloride wastewater and nickel-containing wastewater treatment process
6.3.2 Inorganic waste water, organic wastewater treatment process in a first-class treatment, a strengthening treatment, two treatment, the depth of treatment and back
The process used in the processing unit is shown in Table 2.
Table 2 Wastewater treatment process
Processing level processing
Primary treatment grille, pre-precipitation, conditioning
First - stage intensive treatment of coagulation sedimentation, coagulation flotation
Secondary Treatment Hydrolysis Acidification - Contact Oxidation, A/O - Contact Oxidation, SBR - Contact Oxidation, Contact Oxidation - MBR
Depth processing
Coagulation sedimentation, coagulation flotation
Sand filter, mechanical filtration
Reuse processing
Ultrafiltration, reverse osmosis
Ion exchange
6.3.3 In accordance with current national and local emission standards, total pollutant control requirements, treatment of wastewater water and water quality,
Processing requirements, processing to determine the depth of treatment of wastewater, select the appropriate treatment process, and give priority to the successful operation of the
Inspection process.
6.3.4 The efficiency of each unit should be determined by experiment or analogous operation of similar enterprises. When there is no data, the units are processed
Efficiency can be found in Table 3.
Table 3 Wastewater treatment process unit processing efficiency
Workshop or production unit discharge port
Processing Object Processing Process Efficiency (%)
Reactive chlorine wastewater reduction method
Vinyl chloride wastewater stripping 100
Mercury - containing Wastewater Mercury Reactor - Adsorption, Filtration, Ion Exchange 99.7
Nickel - containing wastewater reverse osmosis 95
Total discharge of wastewater
Processing level processing technology
Processing efficiency (%)
CODCr BOD5 SS
A primary treatment grid, pre-precipitation, adjust 3 ~ 5 1 ~ 3 -
Level intensive processing
Coagulation sedimentation 10 ~ 15 10 ~ 20 70 ~ 90
Coagulation air float 20 ~ 30 10 ~ 25 70 ~ 90
Secondary processing
Hydrolysis Acidification - Contact Oxidation 65 ~ 85 75 ~ 85 -
Traditional Activated Sludge - Contact Oxidation 60 ~ 80 80 ~ 90 -
Depth processing
Coagulation sedimentation 15 ~ 25 10 ~ 20 50 ~ 75
Coagulation floating 15 ~ 30 15 ~ 30 50 ~ 75
Filter 10 ~ 15 5 ~ 10 80 ~ 90
The desalination rate of the membrane was 95 to 97
6.4 Process design requirements
6.4.1 Inorganic wastewater treatment
6.4.1.1 inorganic wastewater treatment process mainly includes. coarse (fine) grille, regulating pool, grit (pre-sinking) pool and so on.
6.4.1.2 Coarse gratings and fine grids shall comply with the following requirements.
A) the use of mechanical clearance, the coarse grid gap should be 10mm ~ 20mm, the use of artificial removal should be 15mm ~
25mm, the grid should be set before the pump should meet the pump does not block requirements;
B) fine grille should choose a self-cleaning capacity of the rotating machinery grille, grille clearance should be 2mm ~ 5mm;
C) The upper part of the grid should be set up working platform, the height should be higher than the grid before the maximum design water level 0.5m, the work platform should be
Have safety and rinse facilities;
D) When the wastewater is acid (alkali), the grid should be corrosion-resistant materials;
E) bar slag should be transported by mechanical transport, dehydration after Sinotrans.
6.4.1.3 Regulating pools shall meet the following requirements.
A) adjust the effective volume of the pool can be 12h ~ 24h average flow meter, the effective depth should be 4m ~ 6m. Adjust the pool
Should be set up mixed facilities, should be used for air mixing or mechanical mixing, when the use of mechanical mixing, can be used paddle, propulsion or
Eddy current, mixed power should be 4W/m3 (waste water) ~ 8W/m3 (waste water); when using aeration equipment (perforated pipe aeration)
, The aeration rate should be 2.7m3/(m2 • h) ~ 4.5m3/(m2 • h), the aeration equipment should consider the anti-clogging measures;
B) The bottom of the regulating pool should be equipped with a sump, the bottom should have not less than 0.01 slope, slope to the sump, pool should be set
Overflow pipe, should not be set up ladder, can be set set pit, the use of sludge pump will be discharged;
C) should be set in the adjustment pool pH adjustment facilities, the pool should take the appropriate anti-corrosion measures;
D) adjust the pool should set the level control and alarm device.
6.4.1.4 Sedimentation (pre-sinking) pools shall meet the following requirements.
A) should choose advective grit chamber, the design parameters can refer to the provisions of GB 50014;
B) pre-settling tank residence time should be 40min ~ 100min, effective water depth should be 2m ~ 3m, the pool should be equipped with scum
Scraping facilities
C) grit chamber or pre-settling tank should adopt the machinery to exclude the sand way, the bottom should consider the anti-silt measures, the use of gravity to remove the mud
Sand, the sand pipe and mud pipe should be considered anti-blocking or clear measures.
6.4.1.5 inorganic wastewater first-order intensive treatment can choose coagulation sedimentation, coagulation and other processes, process design requirements are as follows.
A) coagulants can be used iron salts, aluminum salts, etc., can also be used in conjunction with coagulants or organic polymer coagulant in combination, so that
Before use should be based on the characteristics of waste water quality, through the test to determine the appropriate formula;
B) coagulation time should be 10min ~ 15min;
C) the sedimentation time should be 3h ~ 5h, the surface load should be 0.8m3/(m2 • h) ~ 1.5m3/(m2 • h);
D) the use of air flotation process, the design parameters should be determined through the test, when there is no relevant information, the air float water and gas contact
Time should not take less than 60s, the separation area surface load (including dissolved water) should be 4m3/(m2 • h) ~ 6m3/(m2 • h)
Hydraulic retention time should take 20min ~ 40min.
6.4.1.6 coagulation sedimentation (air flotation) process after the water SS indicators are not up to standard, it is appropriate to use filtration, the process
Requirements are as follows.
A) filtration system water SS concentration should be less than 50mg/L;
B) filtration system can be used sand filter, carbon filter and other filter or mechanical filter, backwash can be used both water and compressed air
Gas, backwash water to be discharged to the conditioning pool for re-treatment;
C) filter media can be anthracite, quartz sand, ceramic filter, polystyrene foam filter beads, emery, fiber ball,
Fiber bundle and other filter;
D) filter tank design can refer to the provisions of GB/T 50335, filter selection should be based on similar business experience to determine.
6.4.2 Organic wastewater treatment
6.4.2.1 organic wastewater treatment process mainly includes. coarse (fine) grille, regulating pool, grit (pre-sinking) pool, etc.
Process design can refer to the provisions of this standard 6.4.1.2 ~ 6.4.1.4.
6.4.2.2 organic wastewater first-order intensive treatment can choose coagulation sedimentation, coagulation and other processes, process design can refer to 6.4.1.5
Provisions.
6.4.2.3 organic wastewater secondary treatment process can be based on wastewater quality, can be used anaerobic biochemical treatment and aerobic biochemical treatment
Combination process, or the use of two kinds of aerobic biochemical treatment combination process.
6.4.2.4 Organic Wastewater Secondary Treatment Process Anaerobic biochemical treatment unit Wastewater BOD5. N. P should be.200. 5. 1 ~ 350. 5. 1,
BOD5. N. P should be 100. 5. 1 in the aerobic treatment unit wastewater. When the requirements are met, the nutrient should be added.
6.4.2.5 Anaerobic biochemical treatment unit should adopt the hydrolysis and acidification process, the process requirements are as follows.
A) Hydrolysis acidification tank design parameters should be based on analogy data or test to determine, when there is no relevant information, hydrolysis and acidification
Should take 6h ~ 12h;
B) Hydrolysis acidification tank should adopt riser, the effective depth should be 4m ~ 6m, the ascending flow rate should be 0.7m/h ~ 1.5m/h;
C) Hydrolysis acidification tank can be suspended according to the actual needs of a certain biological filler, packing height is generally appropriate for the hydrolysis of acidification pool
Pool depth of 1/2 ~ 2/3.
6.4.2.6 aerobic biochemical treatment unit should adopt biological contact oxidation process, can also be used A/O or SBR and other activated sludge
Art, process design should be consistent with CECS111, CECS128, HJ 576, HJ 577 and other standards, aerobic biochemical treatment alone
The main design parameters of the element are shown in Table 4 and meet the following requirements.
A) the use of biological contact oxidation method to calculate the effective pool volume, the oxygen demand should be calculated according to actual needs;
B) Aeration equipment should be able to adjust the oxygen supply according to the quality of water and water, and the design should meet the requirements of CECS97;
C) Aeration tank should be set up to eliminate foam facilities, can be added defoamer, water defoaming and other measures.
Table 4 aerobic biochemical treatment unit main design parameters
Aerobic unit
Types of
Sludge concentration
(G/L)
Sludge load
[KgCODCr /
(KgMLSS · d)]
Volume load
[KgCODCr/(m3 • d)]
Sludge flow ratio
(%)
Run cycle
(H)
Water ratio
(%)
Contact Oxidation - - 0.80 ~ 1.80 - - -
A/O 2.5 to 4.0 0.15 to 0.20 0.38 to 0.80 50 to 100 -
SBR 2.5 ~ 4.0 0.16 ~ 0.32 0.40 ~ 1.28 - 6 ~ 10 15 ~ 30
6.4.2.7 organic wastewater treatment process in the sedimentation tank, can be divided into the initial sedimentation tank, coagulation sedimentation tank and secondary sedimentation tank, Shen
The pool type of the pool should be determined according to factors such as the scale of treatment, the characteristics of the process and the geological conditions of the site. It can be used as an advection,
And vertical flow and so on. The initial sedimentation tank should adopt mechanical sludge, and should be set up scum scraping facilities. The main design parameters of the sedimentation tank are shown in the table
5.
Table 5 The main design parameters of the sedimentation tank
Category Sedimentation tank position Precipitation time (h)
Surface load
[M3/(m2 • h)]
Sludge moisture content
(%)
Solid load
[Kg/(m2 • d)]
Remarks
Initial sedimentation tank Primary strengthening treatment 1 ~ 2 1.5 ~ 3.0 95.0 ~ 97.0 -
Secondary sedimentation tank
Secondary treatment 1.5 ~ 4 0.7 ~ 1.5 99.0 ~ 99.4 ≤ 150 after biofilm
Secondary treatment 1.5 ~ 4 0.5 ~ 1.2 99.2 ~ 99.6 ≤ 150 after activated sludge
Coagulation sedimentation tank depth of 1.5 ~ 4 0.7 ~ 1.5 99.0 ~ 99.5 -
6.4.3 active chlorine wastewater treatment
6.4.3.1 Activated chlorine wastewater should be treated with sulfite reduction.
6.4.3.2 Sulfite reduction treatment of active chlorine wastewater, process design requirements are as follows.
A) should be used intermittent or continuous treatment. When using intermittent treatment, adjust the pool volume should be an average hourly waste
Water flow of 8h ~ 12h dollars; continuous treatment, may be appropriate to reduce the capacity of the regulator, and set the automatic detection and administration
Device;
B) sulfite can be used sodium bisulfite, sodium sulfite, sodium metabisulfite;
C) influent pH should be controlled at 8 ~ 9, the reaction time should be controlled at 20 min ~ 30min;
D) the dosage of sulfite should be 1. 1.8 ~ 1. 2.4 (available chlorine. sodium sulfite);
E) the dosage of other agents should be determined by experiment;
F) The sulfite reduction reaction tank should meet the cycle time once treated. Reaction tank should be used mechanical stirring, should not
Stir with air.
6.4.4 Wastewater treatment of vinyl chloride
6.4.4.1 Vinyl chloride waste water should be treated with stripping.
6.4.4.2 The use of stripping treatment of vinyl chloride wastewater, process design requirements are as follows.
A) should be used intermittent treatment, adjust the pool capacity should be based on the average hourly wastewater flow 8h ~ 12h dollars;
B) the bottom of the stripping tower should be 110 ℃ ~ 115 ℃, the top temperature should be 95 ℃ ~ 110 ℃;
C) stripping tower reaction time should be 10min ~ 15min.
6.4.5 Wastewater treatment with mercury
6.4.5.1 Mercury-containing wastewater treatment process can be used chemical flocculation method, ion exchange method, activated carbon adsorption method and other different combinations of technology.
Mercury-containing wastewater treatment should be intermittent.
6.4.5.2 The effective volume of the mercury-containing wastewater treatment tank shall be set according to a maximum discharge.
6.4.5.3 mercury-containing wastewater mercury reactor should be added in the precipitation agent and coagulation auxiliaries, precipitants optional sodium sulfide or sodium hydrosulfide, etc.,
So that the wastewater Hg2 into HgS particles precipitation, the process requirements are as follows.
A) the pH of the mercury reactor should be controlled at 7 to 9;
B) coagulation auxiliaries can be used polyferric sulfate (PFS), should be based on the use of waste water quality characteristics, through the test to determine
Appropriate dosing ratio;
C) mercury reactor aging time should take 1h, static sedimentation should take 1h ~ 1.5h, granular sediment should be discharged into the waste water containing mercury
Mud pond, the separate treatment.
6.4.5.4 The effective volume of the sump shall be set according to a maximum discharge.
6.4.5.5 separator can be used adsorption, filtration and resin exchange combination process, process requirements are as follows.
A) the use of a combination of technology, according to the content of mercury in wastewater with a flexible mix can be used adsorption and filtration combination, adsorption,
Filtration and resin exchange combinations, filtration and resin exchange combinations;
B) Adsorbent can be used sawdust or activated carbon, when the adsorption of mercury concentration is high, can be activated carbon plus sodium sulfide curing;
C) Sawdust, activated carbon and sodium sulfide-cured precipitates after adsorption of mercury should be placed in a sealed drum
Storage, by the disposal of qualified hazardous waste units of the disposal of disposal.
6.4.5.6 The effective volume of the water quality monitoring tank shall be set according to a maximum discharge.
6.4.5.7 Mercury-containing wastewater treatment equipment within the equipment, structures, floor, foundation, etc. should take the appropriate anti-corrosion, anti-seepage and other measures,
And in line with the provisions of GB/T 50934.
6.4.6 Wastewater treatment with nickel
6.4.6.1 should be used intermittent treatment, nickel-containing wastewater conditioning pool effective volume should be 8h ~ 12h average flow meter.
6.4.6.2 nickel-containing wastewater should adopt the chemical reaction and reverse osmosis combination process, the process requirements are as follows.
A) chemical reaction should adopt sodium hydroxide and sodium carbonate as a softener, dosage should be determined by experiment;
B) water turbidity should be less than 1NTU, when the turbidity of more than 1NTU, should be set up filtration facilities;
C) water SDI should be less than 3;
D) the residual chlorine content of water should be less than 0.1mg/L. When the residual chlorine more than 0.1mg/L, it is appropriate to use dosing reductant (such as sub
Sodium bisulfate) and monitored by ORP.
6.4.7 Depth (reuse) treatment
6.4.7.1 The effective volume of the middle pool should be 0.5h ~ 1h average flow meter, the effective water depth should be 4m ~ 6m.
6.4.7.2 Depth of wastewater treatment can be used coagulation, precipitation (or clarification, air floatation), filtration and other processes, the process design should be consistent
GB/T 50335 and other standards, and meet the following requirements.
A) the use of coagulation, precipitation (or clarification, air flotation) process, the mixing time should take 30s ~ 120s, the reaction time should
Take 5min ~ 20min, clarification pool to increase the flow rate should take 0.4mm/s ~ 0.6mm/s, stay time to take 1.5h ~ 2h;
Gas and water contact time should not be less than 60s, the separation area surface load (including dissolved water) should be 4m3/(m2 • h) ~ 6m3/(m2 • h)
Hydraulic retention time should take 20min ~ 40min, sedimentation tank and chemical coagulation related design see the standard 6.4.1.5 and 6.4.2.7;
B) the use of filtration process, the water SS concentration should be less than 50mg/L, filter tank process design should be consistent with GB/T 50335
Regulations, the selection of filters and related design see the standard 6.4.1.6.
6.4.7.3 Wastewater reuse process should be based on the enterprise on the reuse of water quality requirements, should be given priority to mature technology with advanced technology,
The following process can also be used.
A) the water quality requirements are not high, can be used directly after the disinfection process. Should use the production of caustic soda by-product times
Sodium chlorate as a disinfectant, the effective chlorine content of the liquid should be 4% to 7%, disinfection contact time should be greater than 30min;
B) desalination requirements for water quality, disinfection can be used before the ion exchange, ultrafiltration, reverse osmosis, etc. one or several
Combination of processes.
6.4.7.4 Mercury-containing wastewater treatment does not meet the requirements of the production process is prohibited back to the acetylene generation.
6.4.8 Sludge treatment and disposal
6.4.8.1 Wastewater treatment sludge production is shown in Table 6.
Table 6 Wastewater treatment Sludge production
Waste water type sludge production
The inorganic wastewater is calculated by the influent SS
Organic wastewater 0.1kg DS/kgCOD ~ 0.3kg DS/kgCOD
6.4.8.2 The sludge treatment process shall be determined in accordance with the final disposal and shall meet the following requirements.
A) When the sludge and sludge mixed with sludge treatment should be set up sludge homogeneous pool, the volume should be based on various types of sludge production
And sludge disposal program to determine;
B) organic sludge should be set up sludge enrichment facilities, can be used gravity concentration, mechanical enrichment and flotation enrichment process, when mining
When concentrated with gravity, the solid load of sludge should be 40kg/(m2 • d) ~ 60kg/(m2 • d), the concentration time should not be less than 16h,
When the use of mechanical concentration, should be based on similar business experience to determine;
C) sludge dewatering machine can be used box filter, belt dewatering machine or centrifugal dehydration machine, belt dehydration machine treatment negative
The centrifugal dehydration separation factor should be less than 3000; 100kgDS/(m • h) ~.200kgDS/(m • h)
D) sludge in the dehydration before the drug should be adjusted, the sludge after dosing, should immediately mix reaction, into the dehydration machine, pharmaceutical
Class and dosage should be determined by experiment;
E) the moisture content of sludge before dewatering should be less than 98%, the moisture content of sludge after dehydration should be less than 80%;
F) Mercury (nickel) sludge is a hazardous waste and should be treated separately from other sludge. Separate mercury (nickel) sludge
Pool and dewatering equipment. Mercury (nickel) sludge dewatering should be placed in a sealed sealed barrel in the storage, by a dangerous
Waste disposal of qualified units of recycling; pressure filtrate should be discharged into the mercury (nickel) wastewater treatment pool, not with other waste water
deal with.
6.4.8.3 The sludge dewatering equipment shall be arranged in accordance with the following requirements.
A) filter press should be arranged in a single row;
B) filter the design working hours of each class should not be greater than 6h;
C) a filter cake or filter cake storage site, the volume or area according to filter cake conditions to determine the transport;
D) Consideration should be given to facilities and access to filter cake.
6.4.8.4 After the dewatering of the sludge, the use of plastic bags for packaging, should be stored in a rain, anti-seepage, anti-Yang, anti
Loss of premises, and should be in accordance with the provisions of GB 15562.2, set a clear logo, according to the requirements of GB 18597 management.
6.4.8.5 The final disposal of sludge mainly includes comprehensive utilization, incineration and landfill, etc., should meet the following requirements.
A) Mercury (nickel) sludge is hazardous waste and should be disposed of separately. After dehydration, it should be carried out in accordance with the relevant national hazardous waste
The provisions of the management of the provisions of the corresponding procedures for the disposal of qualified waste with the disposal of qualified units;
B) calcium carbide residue is alkaline, containing sulfide, phosphide and other toxic and hazardous substances. Belong to the general industrial solid waste,
Such as landfill disposal, should meet the GB 18599, HG/T 20504 and other standards;
C) the comprehensive utilization of biochemical and chemical sludge should be adapted to local conditions, sludge landfill should meet the standards of GB 18599 and other standards;
Sludge drying incineration should be consistent with GB 18484, GB 50014 and other standards.
6.4.9 Exhaust gas treatment
6.4.9.1 Sources of exhaust gases include.
A) waste water collection pool, regulating pool, anaerobic section, sludge storage tank, sludge dewatering, dosing and other odors;
B) Exhaust gas produced by stripping of vinyl chloride.
6.4.9.2 Waste gas collection shall meet the following technical requirements.
A) Odor and vinyl chloride emissions were collected separately;
B) to take closed, local isolation and negative pressure suction and other measures to collect the process of collecting waste gas.
6.4.9.3 Odor treatment can be used physical, biological, chemical deodorant and other processes, should meet the following technical requirements.
A) the use of plasma deodorization process should be filtered before the odor purification, should control the intake humidity of less than 85%, the temperature should
Less than 65 ℃, the plasma device discharge voltage should be less than 3kV, ion production should be greater than 1.0 × 106/cm3, ozone concentration
Should be less than 0.2mg/m3, odor retention time should be 1.0s ~ 2.0s;
B) the use of biological filter deodorization process, the filler organic matter content should be 25% to 55%, filler thickness should be 1.0 m ~
1.5m, the reaction temperature should be 15 ℃ ~ 35 ℃, the humidity should be 50% ~ 65%, the liquid cast rate should be 0.7m3/(m3 • d) ~
1.4m3/(m3 • d), odor retention time should be 30s ~ 90s;
C) the use of chemical washing process deodorization, the filler height should be 1.8m ~ 3.0m, liquid to gas ratio should be 1.5 to 2.5, odor
Dwell time should be 1.5s ~ 3s, can be used sodium hypochlorite, potassium permanganate, hydrogen peroxide, sodium hydroxide and so on.
6.4.9.4 Vinyl chloride exhaust can be returned to the production workshop for recycling.
7 Major process equipment and materials
7.1 configuration requirements
7.1.1 grille decontamination machine, diving propeller, decanter, etc. should be dual series or multi-series were configured.
7.1.2 Dosing equipment should be installed according to the type of liquid and treatment series were configured.
7.1.3 Pumps, sludge pumps, dosing pumps, blowers, etc. should be equipped with spare equipment.
7.1.4 Pumps, aeration devices, etc. Spare parts for core components and consumable parts.
7.2 Equipment selection and corrosion protection
7.2.1 Equipment and materials should meet the requirements of the process under the premise of the selection of products meet the following requirements.
A) grille decontamination machine shall comply with the provisions of HJ/T 262;
B) submersible sewage pump should comply with the provisions of HJ/T 336;
C) Roots blowers shall comply with the requirements of HJ/T 251;
D) Microporous aerator should meet the requirements of HJ/T 252;
E) Diving push mixer should comply with HJ/T 279 requirements;
F) Rotary decanter shall comply with HJ/T 277;
G) Scraper shall comply with HJ/T 265;
H) Flotation devices shall comply with the requirements of HJ/T 261;
I) The sludge filter and the frame filter press for sludge dewatering shall comply with the provisions of HJ/T 283,
HJ/T 242;
J) Dosing equipment should comply with the provisions of HJ/T 369;
K) sodium hypochlorite disinfection should be consistent with "sodium hypochlorite disinfectant health quality technical specifications" requirement.
7.2.2 For corrosion-resistant equipment, pipes and materials should be taken to the corresponding anti-corrosion measures, according to the nature of corrosion, according to local conditions
Choose the economic rational, technical and reliable measures, and should meet the relevant provisions of the national standards.
8 detection and process control
8.1 Detection
8.1.1 On-line detection devices The monitoring points shall be located in the workshop or production unit discharge port and the total discharge port of waste water, sampling frequency and
Monitoring items should be determined in accordance with the emission standards, and in line with GB 15581 and other standards. Monitoring items should meet the following requirements
begging.
A) active chlorine wastewater monitoring active chlorine; vinyl chloride wastewater monitoring vinyl chloride; mercury-containing wastewater monitoring total mercury;
Measuring total nickel and other indicators;
B) The total discharge port should monitor the flow, pH, CODCr, TP, SS and other indicators.
8.2 Process control
8.2.1 According to the project size, process and operation and management requirements, to ensure that the water quality, economic and security under the premise,
Select the appropriate control mode, determine the parameter control requirements.
8.2.2 large and medium-sized wastewater treatment project should adopt centralized management, decentralized control of the control system, and should set up laboratory, configuration
Conventional testing and analysis equipment; small-scale wastewater treatment works can be used automatic control, laboratory should be combined with the factory central laboratory
Or external commissioned by the test.
8.2.3 On-line detection devices The test points shall be located in the controlled units of the wastewater treatment works respectively. The monitoring items shall be designed according to the control
System requirements to determine.
Major auxiliary works
9.1 Electricity
9.1.1 Wastewater treatment engineering The technical requirements for electrical engineering should be consistent with the corresponding technical requirements in the production process.
The introduction of the source and the operating room should be set with the production process to consider, high and low voltage levels and power neutral grounding should be with the students
Production equipment consistent.
9.1.2 electrical system design should meet the GB 50055 and other standards.
9.1.3 Construction of the construction site for the use of electricity safety should be consistent with the provisions of GB 50194.
9.2 Water supply and drainage and fire protection
9.2.1 Wastewater treatment works Water supply and drainage and fire protection systems should be considered in line with the production system, domestic water, production water and fire
Facilities should be consistent with GB 50015, GB 50016 and other standards.
9.2.2 Wastewater Treatment The area of fire water should be supplied by the factory fire pipe network.
9.2.3 The water supply and distribution system should be set up independently, and its water supply pipe should adopt plastic water supply pipe, plastic and metal composite pipe or its
He feeds the water pipe and installs the metering device according to the requirements.
9.2.4 Wastewater treatment works Fire hazard categories, fire resistance grades and fire protection systems should be set in accordance with GB 50016 and other standards
set.
9.3 Heating Ventilation and air conditioning
9.3.1 Wastewater Treatment Engineering The ventilation, ventilation and air conditioning design of buildings shall conform to the requirements of GB 50019 and other standards.
9.3.2 Wastewater treatment engineering Heating system design should be unified with the production system planning, heat source should be plant or centralized processing area heating
The system provides; when the building (structure) building mechanical ventilation can not meet the process of indoor temperature and humidity requirements should be set up air conditioning device.
9.3.3 Ventilation design of all types of buildings shall be in accordance with the following principles.
A) the cover structure shall be provided with ventilation facilities;
B) It is possible to dissipate toxic and harmful gases, and shall be constructed in accordance with the requirements for the maximum permissible concentration in the room
The number of ventilation, to determine the ventilation, indoor air is strictly prohibited recycling, should be set up toxic and harmful gas detection and alarm devices;
C) explosion-proof requirements of the workshop should be set up accident ventilation, the accident fan should be explosion-proof type, and can also serve as summer ventilation.
9.4 Architecture and Structure
9.4.1 The shape of the building should be simple, beautiful, and coordinated with the surrounding environment.
9.4.2 Construction, corrosion and structure shall comply with the provisions of GB 50046 and other standards.
9.4.3 cold area of the building structure should take measures to prevent heat.
9.4.4 Structures shall comply with the requirements of GB 50141 and other standards.
Labor safety and occupational health
10.1 Labor safety
10.1.1 Labor safety management shall comply with the provisions of GB 18071.1.
10.1.2 The staff should be trained in the necessary training and should be equipped with the necessary labor safety and health facilities and labor protection products,
By hand maintenance.
10.1.3 Regular safety inspection system should be established and strictly implemented to eliminate accident risks and prevent accidents from occurring.
10.1.4 The chemicals used in the process shall be managed and used in accordance with the requirements of GB/T 16483 and other standards.
10.1.5 Safety precautions and alarm devices should be necessary and non-smoking, fire and speed limits are set in the distinct locations of the project area
Logo.
10.1.6 contingency plans for contingencies such as fire, natural disasters and so on should be developed.
10.2 Occupational health
10.2.1 Occupational health protection should be strengthened in the workplace, and sound insulation and heatstroke and anti-poisoning work should be done.
10.2.2 Occupational disease protection equipment, protective equipment should ensure that the normal working condition, shall not be removed or stopped using.
Construction and Acceptance
Construction of the project
11.1.1 Construction should comply with the requirements of the relevant construction procedures and management documents, in line with relevant national standards and norms
set.
11.1.2 Engineering design, the construction unit shall have a qualification level that matches the project.
11.1.3 Construction and installation works should meet the requirements of construction design documents and equipment technical documents.
The design of the unit to change the file after the construction.
11.1.4 The equipment, materials and devices used in the construction of the project shall conform to the relevant national standards and shall obtain the product certificate
Can be used later.
11.2 Engineering acceptance
11.2.1 Wastewater treatment works should be "construction project (project) completion acceptance method", "construction project completed environmental protection test
Management approach "and the relevant professional acceptance of the organization acceptance, the completion of the project before the acceptance, is strictly prohibited the relevant drainage enterprises into the formal
produce.
11.2.2 Wastewater treatment works related professional acceptance procedures and content should be consistent with GB 50141, GB 50093, GB 50231,
GB 50236, GB 50254, GB 50255, GB 50256, GB 50268 and GB 50275 and other standards.
11.2.3 The project shall conduct performance test on the treatment process during the test run, and the performance test report may be accepted as environmental protection
Of the technical support documents. Performance tests include.
A) the seepage test of each structure;
B) fan running test, test a single fan operation and all the fan linkage operation of the air supply, wind pressure, noise and other parameters
Number, including start-up and stable operation of the parameters;
C) Full load operation test, handling system Full load water, check the operation of the unit, structure and equipment
condition;
D) water quality testing, in accordance with the provisions of frequency, indicators and test methods for water quality testing, analysis of the process unit pollutants
Remove the effect.
12 operation and maintenance
12.1 General provisions
12.1.1 The operation and maintenance of wastewater treatment facilities shall comply with the relevant standards such as CJJ60.
12.1.2 should be equipped with full-time environmental protection technical personnel and water quality monitoring equipment.
12.1.3 Ensure that the engineering equipment is in good condition and that the operation is stable.
12.2 Personnel management
12.2.1 post staff should have the appropriate vocational education background, through the training after the appointment, and regular job training
Training
12.2.2 Procedures, working systems, periodic inspection systems and maintenance management systems for wastewater treatment facilities should be developed.
12.2.3 The operating personnel shall perform their duties according to the system and ensure the stable operation of the system.
12.3 Water quality management
12.3.1 Wastewater treatment facilities should be regularly sampled and analyzed. Routine indicators include pH, CODCr, BOD5, SS,
Phosphide, chloride, sulfide, active chlorine, vinyl chloride, total mercury, total nickel, chroma and so on.
12.3.2 On-line monitoring systems have been installed and should be routinely sampled for manual monitoring.
12.3.3 sampling interval every 6h sampling time, the number of daily sampling of not less than three times, can be analyzed or mixed analysis,
Including pH, CODCr, SS, chloride, active chlorine, vinyl chloride, total mercury, total nickel, color and other indicators at least every day
Once, BOD5 is analyzed at least once a week.
12.3.4 commissioning, restart after parking or emergency should increase the detection frequency.
12.4 Maintenance
12.4.1 Wastewater treatment The engineering facilities shall be operated under conditions that meet the design conditions and, in accordance with the technical requirements,
Gas, automatic control equipment and construction (structure) to carry out inspection and maintenance.
12.4.2 Regular scavenging of scum in the process unit such as grille, grit chamber, pre-settling tank, regulating pool, hydrolysis tank, sludge pool and so on, and
When the process of disposal of the slag, sludge and other pollutants.
12.4.3 Maintenance of wastewater treatment facilities should be included in the maintenance plan of the whole plant, so that the maintenance of wastewater treatment facilities
Time is synchronized with the relevant production facility.
12.5 records
12.5.1 Records of the operating conditions, facility maintenance and production activities of the wastewater treatment plant should be established. The main record
Including.
A) system start, stop time;
B) system operation process control parameters;
C) wastewater on-line monitoring data, wastewater discharge, sludge treatment;
D) Pharmacy approach quality analysis data, quantity and time;
E) the number, time, place of disposal and disposal of sludge and slag;
F) operation and maintenance of major equipment;
G) production accidents and disposal;
H) regular inspection and assessment of the situation.
12.5.2 A uniform record format should be developed to ensure that the content is accurate, timely and complete and free from alteration.
12.5.3 All records should be made for a list of records for records that need to be kept for a long period of time.
12.6 Emergency measures
12.6.1 All possible contingency contingency plans (including environmental protection) should be developed according to the actual situation of production and surrounding environment.
Emergency plan), equipped with the corresponding human, equipment and communications and other resources, reserve the conditions for emergency treatment.
12.6.2 Wastewater treatment project abnormal situation or a major accident, it should promptly analyze and start contingency plans, and according to regulations to
Relevant departments report.
Appendix A
(Informative)
Internal circulation process
A.1 salt mud washing water, pressure water treatment process, the processing process shown in Figure A.1.
Washing bucket salt mud dehydration filter press
Water pressure
Salt water tank waste mud tank used for salt process
Sinotrans disposal
Wash water
Pressure water
Salt cake
Figure A.1 salt water washing water, pressure water treatment process flow chart
A.2 Carbide slag waste water in the carbide slag evaporation, the rest of the treatment for the acetylene section, the processing process shown in Figure
A.2.
Carbide slag wastewater
Comprehensive utilization or landfill disposal
Supernatant
Thick liquid
Clarify the pool
Cooling pool /
Cooling Tower
Back to use
Acetylene section
Slag library
Supernatant
Oxidizing agent
Figure A.2 Process diagram of carbide slag wastewater treatment
A.2.1 Calcium carbide waste water treatment process should be set in the coagulation sedimentation tank before the oxidation and the pool, adjust the pH to 7 to 9, using air or
Chemical oxidants oxidize sulfides and phosphides in wastewater to elemental sulfur and orthophosphates. When using air oxidation, aeration set
(Aeration pipe or aerator) both aeration mixing function, can make carbide residue in the residual acetylene and other gases discharged, aeration
The amount should be calculated according to actual needs, can refer to the choice of 5m3/(m2 • h) ~ 9m3/(m2 • h), aeration equipment should consider anti-
Application Oxidation of chemical oxidants, the amount of aeration should be calculated according to actual needs, can refer to the choice of 3m3/(m2 • h) ~ 6m3 /
(M2 • h).
A.2.2 carbide slag wastewater treatment project should be set up coagulation sedimentation tank, coagulant should adopt ferrous sulfate, coagulation sedimentation tank related parameters
See the provisions of 6.4.1.5 and 6.4.2.7 of this standard.
A.2.3 Calcium carbide slag waste water by coagulation sedimentation treatment after the need for cooling treatment, and then back to the acetylene section, the cooling rate to be based on
The temperature required for the acetylene reactor is determined.
A.3 sodium hypochlorite wastewater treatment process, the processing process shown in Figure A.3.
Stripping tower sodium hypochlorite wastewater and flocculation sedimentation tank cooling tower
Back to B
Acetylene section
Storage mud pool
Figure A.3 Process flow of sodium hypochlorite wastewater treatment
A.4 Polyvinyl Chloride Centrifuge Mother Liquor Treatment Process After pre-treatment, follow-up treatment can be used in one of the following two options
Species, treated effluent for production, treatment process shown in Figure A.4.
tower/
Sludge dewatering pond
Pool /
sludge
Back to production
Concentrated salt water pool
Not reused
Mother liquor recovery pool
Back before the machine
Polyvinyl chloride
Centrifuge mother liquor
Back to production
Option One
Option II
Reuse
Drinking water
Organic wastewater
Processing system
Figure A.4 Polyvinyl chloride centrifugal mother liquor reuse process flow chart
Appendix B
(Informative)
Caustic soda, the main production of PVC production line
B.1 Analysis of main production of caustic soda
Refined agent
Auxiliaries
Inorganic wastewater
NaOH
Solid waste Wastewater
crude salt
Rough salt water tank reaction bucket to clarify barrels of sand filter
Chelating resin tower salt water tank electrolysis high tank salt water preheater electrolyzer
Inorganic wastewater
Electrolyte storage tank evaporation section hydrocyclone low - level slot
Salt and alkali high tank centrifuge salt salt to salt water salt
Hydrogen separator separator separator hydrogen pump separator separator
Two titanium
Condenser
A titanium
Condenser
Chlorine gas
Spray tower
Drying tower liquefaction
Active chlorine wastewater
Waste to the synthetic section
Chlorine distribution station
Hydrogen buffer cylinder
Falling film absorption tower hydrochloric acid storage tank
Send vinyl chloride
Exhaust gas
sell
Hydrogen chloride distribution
Chlorine pump packing tower
Hydrogen separator
Salt water washing water, pressure filter water
Salt water tank
Finished cans of concentrated alkali cooling tank for sale
Waste water
Exhaust gas
Solid Waste
Nickel - containing wastewater
Blasting device
Figure B.1 caustic soda production of the main production line
B.2 Ethylene Oxychlorination Method for the Production of PVC Production
Vinyl chloride
O2
Coarse Vinyl Chloride Synthesis Catalyst CuCl2
exhaust
Distillation of ethylene
Cl2
Monomer storage tank
Organic waste water scrap copper catalyst
Vinyl chloride wastewater
Exhaust gas
Metering tank filter polymerization reactor sedimentation tank air stripping tower sodium filter
Feeding pump centrifuge feeder cyclone separator drying tower
Rotary vibration sieve finished hopper scales
Induced draft fan
Centrifuge mother liquor
Waste water
Exhaust gas
Solid Waste
Figure B.2 Ethylene Oxychlorination of PVC The main production of fouling nodes
B.3 Calcium Carbide Acetylene Process for Major Production of PVC
Mercury-containing wastewater (for sale)
Residue (for sale)
Calcium carbide
Vinyl chloride wastewater
Waste catalyst waste activated carbon
Carbide slag wastewater
Preheater
Cooling tower cleaning tower neutral tower generator
HCl from the synthesis process
Gas cabinet
Water separator Vinyl chloride compressor machine after the cooler
Exhaust gas
Gas cabinet
Water separator low boiling tower high boiling tower monomer storage tank vinyl chloride
Metering tank filter polymerization reactor sedimentation tank air stripping tower sodium filter
Feeding pump centrifuge feeder cyclone separator drying tower
Centrifuge mother liquor
Rotary vibrating screen
Finished hopper scales
Induced draft fan
Pre-cooler
Mercury containing wastewater
Converter
The whole condenser
Alkaline washing tower
Waste water
Exhaust gas
Solid Waste
Sodium hypochlorite wastewater
Figure B.3 calcium carbide acetylene method of the main production of PVC production line
Related standard:   HJ 2047-2015  HJ 2048-2015
   
 
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