CN103359866B - One is purified waste water water quality balance method - Google Patents
One is purified waste water water quality balance method Download PDFInfo
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- CN103359866B CN103359866B CN201310312806.XA CN201310312806A CN103359866B CN 103359866 B CN103359866 B CN 103359866B CN 201310312806 A CN201310312806 A CN 201310312806A CN 103359866 B CN103359866 B CN 103359866B
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Abstract
The present invention relates to a kind of balance method of water quality of purifying waste water, its concrete steps are: part brine waste is entered electro-adsorption treatment system and obtain electro-adsorption dense power and water absorption fresh water; Other waste water and the dense water of electro-adsorption enter filtration-reverse osmosis treatment system and obtain reverse osmosis freshwater; Electro-adsorption fresh water and reverse osmosis freshwater enter water quality regulation pond; Reverse osmosis concentrated water enters electrodialysis process system, and electrodialysis fresh water enters water quality regulation pond, and the dense water of electrodialysis enters evaporation and crystallization system; Evaporative crystallization fresh water enters water quality regulation pond, and salt slurry enters salt-mud treatment technique; The electro-adsorption obtained, reverse osmosis, electrodialysis, evaporative crystallization fresh water are obtained after the equilibrium of water quality regulation pond produce water.The present invention can avoid the shortcoming and defect that single water treatment method effluent quality setting range is narrow, can not carry out adjustment flexibly according to demand, by saliferous wastewater processing technology is combined flexibly, realize effective utilization of waste water resource, reduce the overall investment of waste water engineering, reduce integrated operation cost.
Description
Technical field
The present invention relates to one to purify waste water out water quality balance method, belong to saliferous wastewater processing technology field.
Background technology
The industries such as chemical industry, papermaking, slurrying, printing and dyeing produce a large amount of brine wastes, directly outer row, not only waste water resource but also contaminate environment.The technology realizing reuse when pre-treatment brine waste mainly comprises: reverse osmosis, electrodialysis, thermal evaporation and electro-adsorption etc.Reverse osmosis is good owing to producing water water quality, the reuse technology of Chang Zuowei process water, and Water Sproading rate is generally about 70%, and dense water problem makes environmental protection pressure larger; Electrodialysis is applicable to process Halite water, but fresh water water quality can not direct reuse, also there is dense water problems simultaneously; Electro-adsorption is applicable to processing saltiness at the waste water of 3000mg/L, and producing water water quality can free adjustment, and dense water also exists and is difficult to process, and Water Sproading rate is below 70%; Hot method desalination can obtain solid salt, and fresh water water quality is good, but the processing cost of ton water is high, is applicable to the waste water of the little water yield of process high density.Invest large about 5000 ~ 8000 yuan/(m at present at reverse osmosis method and electroosmose process
3d), working cost is 2 ~ 3 yuan/m
3; Hot method desalter investment is 4 ~ 80,000 yuan/(m
3d), working cost is 30 ~ 100 yuan/m
3.Therefore, brine waste treatment process faces expense and remains high, the problem of deficiency in economic performance.The character of brine waste is very complicated in addition, often need that several cell processing operation is unified into an organic whole and carry out desalination, because in process combination, the problem of the water yield, water quality balance is not well solved, usually cause influent quality to fluctuate, cause whole water treatment system to be paralysed; Simultaneously because balancing control is bad, cause ton water running cost high, Water Sproading rate is low, can not reach effective improvement of waste water.
Summary of the invention
The object of the invention is to purify waste water water quality balance method to solve the high problem of the running cost that faces in brine waste zero emission treating processes and proposing one, several water technology is combined flexibly, by the balancing control of the water yield, water quality, regulate fresh water water quality, reduce investment and the working cost of water treatment system, realize the comprehensive utilization of waste water.
Technical scheme of the present invention: according to the total amount of handled brine waste, water quality characteristics and water supply quality standard, and in conjunction with electro-adsorption, reverse osmosis, electrodialysis and thermal evaporation brine treatment technology aquifer yield and effluent quality feature carries out water quality, water balance figure controls.It is characterized in that this technique adopts the water treatment combination technique of electro-adsorption, filtration-reverse osmosis, electrodialysis and evaporative crystallization, realize the water quality balance of purifying waste water.
Collective of the present invention technical scheme is: one is purified waste water water quality balance method, and concrete steps are as follows:
A) the dense water A of electro-adsorption and electro-adsorption fresh water B is obtained after the waste water of account for brine waste volume fraction 0 ~ 90% being entered electro-adsorption treatment system; Reverse osmosis freshwater C is obtained after other waste water and the dense water A of electro-adsorption enter filtration-reverse osmosis treatment system; Electro-adsorption fresh water B and reverse osmosis freshwater C directly enters water quality regulation pond;
B) reverse osmosis concentrated water D enters electrodialysis process system, and the electrodialysis fresh water E obtained after process enters water quality regulation pond, and the dense water F of electrodialysis enters evaporation and crystallization system;
C) the evaporative crystallization fresh water G obtained after the dense water F of electrodialysis enters evaporation and crystallization system enters water quality regulation pond, and salt slurry H enters salt-mud treatment technique;
D) the electro-adsorption fresh water B, the reverse osmosis freshwater C that are obtained by different salt water treating system, electrodialysis fresh water E, evaporative crystallization fresh water G obtain producing water I after the equilibrium of water quality regulation pond.
Preferred steps a) described in the TDS of brine waste be 400 ~ 10000mg/L, COD
crbe 30 ~ 150mg/L.Preferred steps a) described in the TDS of electro-adsorption fresh water B water quality be 150 ~ 2000mg/L; COD
crbe 10 ~ 100mg/L.The ultra-filtration membrane that ultrafiltration system in preferred steps adopts is conventional inorganic or organic ultra-filtration membrane, and membrane pore size is 10-100nm.
Preferred reverse osmosis treatment system adopts 1 ~ 5 section of low pressure reverse osmosis membrane module and 1 section of high pressure reverse osmosis membrane assembly composition; Reverse osmosis membrane is rolling organic membrane; The TDS of reverse osmosis concentrated water D water quality is 25000 ~ 70000mg/L, COD
crbe 500 ~ 2000mg/L; Reverse osmosis freshwater C water quality TDS is 50 ~ 500mg/L, COD
crbe 3 ~ 30mg/L.
Preferred steps b) described in electrodialysis adopt bipolar membrane electrodialysis or pole-reversing electroosmosis; The TDS of electrodialysis fresh water E water quality is 1000 ~ 5000mg/L, COD
crbe 100 ~ 400mg/L; The TDS of electrodialysis dense water F water quality is 100000 ~ 150000mg/L, COD
crbe 600 ~ 6000mg/L.
Preferred steps c) described in vapo(u)rization system adopt 1 ~ 8 effect evaporation; Vaporizer is rising-film evaporator, falling film evaporator or scraper-type vaporizer; Vapor pressure is 0.2 ~ 0.4MPa.
Preferred steps d) described in water quality regulation pond be stirring and adjusting pond, difference stream equalizing tank or baffling equalizing tank.Described blending means comprises paddling process and self waterpower hybrid system.
Beneficial effect:
The present invention can avoid the shortcoming and defect that single water treatment method effluent quality setting range is narrow, can not carry out adjustment flexibly according to demand, by saliferous wastewater processing technology is combined flexibly, effectively realize effective utilization of waste water resource, reduce the overall investment of waste water engineering, reduce integrated operation cost, realize good economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the method for electro-adsorption, filtration-reverse osmosis, electrodialysis and evaporated and purified water water quality balance
The method of the filtration-reverse osmosis of Fig. 2 embodiment 3, electrodialysis and evaporated and purified water water quality balance
Embodiment
Embodiment 1
TDS in the qualified discharge waste water of certain industrial enterprise is 4000mg/L, COD
crfor the 75mg/L water yield is 20,000 tons/day, enterprise the water quality requirement TDS of reuse can be less than 1000mg/L, COD
crbe less than 60mg/L.The treatment process adopted as shown in Figure 1, carries out balancing control to water quality, the water yield as follows:
Controlling electro-adsorption amount of inlet water is 0.8 ten thousand tons/day, and filtration-reverse osmosis technique flooding quantity is 1.2 ten thousand tons/day.It is 1400mg/L, COD that electro-adsorption produces water TDS
crfor 50mg/L.Ultrafiltration adopts aperture to be the ceramic super-filtering film of 20nm, and reverse osmosis adopts four sections of reverse osmosis systems, and wherein one to three sections is low-pressure reverse osmosis membrane, and the 4th section is high pressure reverse osmosis membrane, and dense water D water quality TDS is 45000mg/L, COD
crfor 600mg/L, fresh water C water quality TDS is 200mg/L, COD
crfor 15mg/L.Electrodialysis adopts bipolar membrane electrodialysis, and the fresh water E water quality TDS after process is 2200mg/L, COD
crfor 280mg/L; Dense water F water quality TDS is 100000mg/L, COD
crfor 680mg/L.Vapo(u)rization system adopts eight effect scraper-type vaporizers, and steam is 180 DEG C of saturation steams, and vapor pressure is 0.38MPa.All fresh water enters the mixing of baffling equalizing tank.Produce after water mixing preparation through above-mentioned technique and meet enterprise's quality of reused water standard.
Embodiment 2
The process of paper industry brine waste, brine waste water quality TDS is 450mg/L, COD
crfor 35mg/L, the water yield is 10,000 tons/day.Enterprise can the water quality requirement TDS of reuse be below 100mg/L, COD
crrequire lower than 30mg/L.Process flow sheet as shown in Figure 1, carries out balancing control to water quality, the water yield as follows:
Controlling electro-adsorption flooding quantity is 0.9 ten thousand tons/day, and the water inlet of filtration-reverse osmosis technique is 0.1 ten thousand tons/day.It is 400mg/L, COD that electro-adsorption produces water TDS
crfor 70mg/L; Reverse osmosis produced water TDS is 30mg/L, COD
crlower than 2mg/L, electric osmose division water TDS is 150mg/L, COD
crfor 20mg/L.Ultrafiltration adopts aperture to be the ceramic super-filtering film of 50nm; Reverse osmosis adopts six sections of reverse osmosis systems, and reverse osmosis membrane is rolling organic membrane, and one to five sections of reverse osmosiss adopt low-pressure reverse osmosis membrane, and the 6th section adopts high pressure reverse osmosis membrane, and reverse osmosis concentrated water TDS is 27000mg/L, COD
crfor 1880mg/L, reverse osmosis produced water TDS is 50mg/L, COD
crfor 5mg/L.Electrodialysis adopts bipolar membrane electrodialysis, and the fresh water E water quality TDS after process is 1100mg/L, COD
crfor 400mg/L; Dense water F water quality TDS is 12000mg/L, COD
crfor 5700mg/L.Vapo(u)rization system adopts triple effect falling film evaporator, and steam is 150 DEG C of saturation steams, and vapor pressure is 0.3MPa.All fresh water enters the mixing of stirring and adjusting pond.Produce after water mixing preparation through above-mentioned technique and meet enterprise's quality of reused water standard.
Embodiment 3
The process of coal chemical industry brine waste, brine waste water quality TDS is 9500mg/L, COD
crfor 150mg/L, the water yield is 100,000 tons/day.Quality of reused water is that TDS is lower than 1000mg/L, COD
crlower than 60mg/L.Process flow sheet as shown in Figure 2, carries out balancing control to water quality, the water yield as follows:
TDS is higher for this brine waste, does not meet electro-adsorption inflow requirement, and therefore all waste water directly enters filtration-reverse osmosis treatment system.Ultrafiltration adopts aperture to be 10nm hollow-fibre membrane, and reverse osmosis adopts two sections of reverse osmosis systems, and first paragraph adopts low-pressure reverse osmosis membrane, and second segment adopts high pressure reverse osmosis membrane, and dense water D water quality TDS is 70000mg/L, COD
crfor 1000mg/L, fresh water C water quality TDS is 500mg/L, COD
crfor 28mg/L.The dense water of reverse osmosis enters pole-reversing electroosmosis system, and the fresh water E water quality TDS after process is 4600mg/L, COD
crfor 100mg/L; Dense water F water quality TDS is 145000mg/L, COD
crfor 2800mg/L.Vapo(u)rization system mono-effective falling film evaporator, steam is 135 DEG C of saturation steams, and vapor pressure is 0.22MPa.All fresh water enters the mixing of difference stream equalizing tank, and water quality reaches for water quality standard.
Claims (3)
1. purify waste water a water quality balance method, it is characterized in that adopting the water treatment combination technique of electro-adsorption, filtration-reverse osmosis, electrodialysis and evaporative crystallization, realize the water quality balance of purifying waste water, concrete steps are as follows:
A) the dense water A of electro-adsorption and electro-adsorption fresh water B is obtained after the waste water of account for brine waste volume fraction 0 ~ 90% being entered electro-adsorption treatment system; Reverse osmosis freshwater C is obtained after other waste water and the dense water A of electro-adsorption enter filtration-reverse osmosis treatment system; Electro-adsorption fresh water B and reverse osmosis freshwater C directly enters water quality regulation pond; The TDS of wherein said brine waste is 400 ~ 10000mg/L, COD
crbe 30 ~ 150mg/L; The TDS of described electro-adsorption fresh water B water quality is 150 ~ 2000mg/L; COD
crbe 10 ~ 100mg/L; Reverse osmosis treatment system adopts 1 ~ 5 section of low pressure reverse osmosis membrane module and 1 section of high pressure reverse osmosis membrane assembly composition; Reverse osmosis membrane is rolling organic membrane; The TDS of reverse osmosis concentrated water D water quality is 25000 ~ 70000mg/L, COD
crbe 500 ~ 2000mg/L; Reverse osmosis freshwater C water quality TDS is 50 ~ 500mg/L, COD
crbe 3 ~ 30mg/L;
B) reverse osmosis concentrated water D enters electrodialysis process system, and the electrodialysis fresh water E obtained after process enters water quality regulation pond, and the dense water F of electrodialysis enters evaporation and crystallization system; Wherein said electrodialysis adopts bipolar membrane electrodialysis or pole-reversing electroosmosis; The TDS of electrodialysis fresh water E water quality is 1000 ~ 5000mg/L, CODCr is 100 ~ 400mg/L; The TDS of electrodialysis dense water F water quality is 100000 ~ 150000mg/L, COD
crbe 600 ~ 6000mg/L;
C) the evaporative crystallization fresh water G obtained after the dense water F of electrodialysis enters evaporation and crystallization system enters water quality regulation pond, and salt slurry H enters salt-mud treatment technique;
D) the electro-adsorption fresh water B, the reverse osmosis freshwater C that are obtained by different salt water treating system, electrodialysis fresh water E, evaporative crystallization fresh water G obtain producing water I after the equilibrium of water quality regulation pond.
2. water quality balance method of purifying waste water according to claim 1, is characterized in that step c) described in vapo(u)rization system adopt 1 ~ 8 effect evaporation; Vaporizer is rising-film evaporator, falling film evaporator or scraper-type vaporizer; Vapor pressure is 0.2 ~ 0.4MPa.
3. water quality balance method of purifying waste water according to claim 1, is characterized in that steps d) described in water quality regulation pond be stirring and adjusting pond, difference stream equalizing tank or baffling equalizing tank.
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| CN103723799B (en) * | 2013-12-23 | 2015-04-08 | 北京京润新技术发展有限责任公司 | Electrodialyzer and near-zero-release industrial wastewater recycling technique |
| CN103739132A (en) * | 2014-01-02 | 2014-04-23 | 杭州深瑞水务有限公司 | High-salinity industrial wastewater reusing treatment process |
| CN104478174B (en) * | 2014-12-19 | 2016-06-29 | 新疆环境工程技术有限责任公司 | High saliferous treatment of dyeing wastewater reuse zero-emission integrated approach |
| CN105366742A (en) * | 2015-11-05 | 2016-03-02 | 东华工程科技股份有限公司 | Method for allocating quality and quantity of reuse water |
| CN106977037A (en) * | 2017-06-08 | 2017-07-25 | 哈尔滨锅炉厂有限责任公司 | A kind of industrial wastewater treatment device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1431250A2 (en) * | 2002-12-20 | 2004-06-23 | Barnstead Thermolyne Corporation | Water purification system and method |
| CN101955282A (en) * | 2010-10-18 | 2011-01-26 | 江苏省环境科学研究院 | Method for realizing zero emission of dyeing wastewater with high salinity in printing and dyeing enterprises |
| CN102086072A (en) * | 2011-03-11 | 2011-06-08 | 波鹰(厦门)科技有限公司 | Cyclic utilization device of dyeing and printing advanced treatment wastewater and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1431250A2 (en) * | 2002-12-20 | 2004-06-23 | Barnstead Thermolyne Corporation | Water purification system and method |
| CN101955282A (en) * | 2010-10-18 | 2011-01-26 | 江苏省环境科学研究院 | Method for realizing zero emission of dyeing wastewater with high salinity in printing and dyeing enterprises |
| CN102086072A (en) * | 2011-03-11 | 2011-06-08 | 波鹰(厦门)科技有限公司 | Cyclic utilization device of dyeing and printing advanced treatment wastewater and method thereof |
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