CN1699223A - Method of preparing pure water using metallurgic sewage - Google Patents
Method of preparing pure water using metallurgic sewage Download PDFInfo
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- CN1699223A CN1699223A CNA2005100135103A CN200510013510A CN1699223A CN 1699223 A CN1699223 A CN 1699223A CN A2005100135103 A CNA2005100135103 A CN A2005100135103A CN 200510013510 A CN200510013510 A CN 200510013510A CN 1699223 A CN1699223 A CN 1699223A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention relates to a method of preparing pure water using metallurgic sewage which comprises the following steps, (1) reclaiming sewage water, preparing recycled water, wherein the water outlet suspended matter <100mg/l, (2) treating the recycled water, subjecting the recycled water to fine grid filtration, sterilizing, micro-flocculation, entrapping hairs, making the COD <30mg/l, (3) ultra-filtration treatment, passing the recycled water through external pressured immersion type ultra-filtration apparatus for treatment, meeting the requirement of SDI<2, (4) reverse osmosis desalination treatment, loading the ultrafiltrated water into reverse osmosis apparatus for desalinization treatment.
Description
Technical field
The present invention relates to a kind of method of water treatment, particularly the processing of metallurgy industry industrial sewage and recoverying and utilizing method belong to technical field of waste water processing.
Background technology
Water is important and valuable resource, and along with industrial sustainable and stable development, the water resources disparities between supply and demand become increasingly conspicuous.Metallurgy industry is the water rich and influential family, in process of production, a large amount of industrial sewage dischargings is arranged on the one hand, and contaminate environment needs again to consume a large amount of pure water (de-salted water) on the other hand, so the problem of environmental pollution and a large amount of water consumptions is all very outstanding.At present, metallurgy industry uses the pure water reparation technology mostly to be pre-treatment+reverse osmosis (RO) method, this method is the novel process that grows up the 1980s, it is the water source with supersalinity surface water, well water, with reverse osmosis (RO) technology is core, by former water is flocculated, pre-treatment such as precipitation, absorption, remove the pollution substances such as colloid in the water, the influent quality that reaches the RO film requires (pollution index SDI＜4), squeeze into the RO film with high-pressure pump again, through the RO film, 97% ion is filtered off in the water, thereby produces de-salted water.In addition, adopt primary pure water ion exchange method to produce the technology of pure water in addition, this technology only is applicable to that ion content is lower than the surface water of 400mg/l, well water is handled.Obviously, it is the water source that aforesaid method all needs with surface water or well water, needs the mass consumption water resources.
Summary of the invention
Problem to be solved by this invention is to overcome the defective of prior art and a kind of method of utilizing metallurgic sewage to produce pure water is provided.
The method of the invention is solved by following technical scheme:
A kind of method of utilizing metallurgic sewage to produce pure water, described method is undertaken by following operation:
A. reclaim sewage, produce middle water: get the metallurgy industry effluent sewerage through flocculation, precipitation, reach the middle water requirement of water suspension less than 100mg/l;
B. middle water treatment: water in above-mentioned through fine fack filtration, sterilization and disinfection, little flocculation treatment, is held back hair, remove partial organic substances, make its COD less than 30mg/l;
C. uf processing: the middle water of above-mentioned processing is immersed ultra-filtration equipment through external pressure handle, reach the requirement of SDI＜2;
D. reverse osmosis desalination is handled: the water after uf processing enters the reverse osmosis unit desalting treatment.
The above-mentioned method of utilizing metallurgic sewage to produce pure water, described reverse osmosis desalination is handled and is comprised the two-pass reverse osmosis desalting treatment, wherein, the pre-de-salted water ratio of desalinization that first-stage reverse osmosis is handled greater than 97%, go out electrical conductivity of water＜80 μ s/cm, the rate of recovery 75%, the de-salted water ratio of desalinization that two-pass reverse osmosis takes off processing greater than 97%, the rate of recovery 90%, go out water conductivity＜10 μ s/cm, the dense water of two-pass reverse osmosis is recovered into single stage desalting water and uses.
The above-mentioned method of utilizing metallurgic sewage to produce pure water, described secondary reverse osmosis desalination is provided with smart desalting treatment operation after handling, described smart desalting treatment operation is the water source with the two-pass reverse osmosis water outlet, mixes bed through zwitterion, produces the smart de-salted water of chloride ion content＜0.1mg/l.
The above-mentioned method of utilizing metallurgic sewage to produce pure water, the ultrafiltration product water during described first-stage reverse osmosis is handled adds reductive agent and Scale inhibitors enters reverse-osmosis treated again, and the add-on of reductive agent and Scale inhibitors is 2-10mg/l.
The inventive method is the water source with metallurgical industry sewage through the water outlet of flocculation, post precipitation, adopt external pressure immerseable ultrafiltration (UF)+reverse osmosis (RO) legal system to get de-salted water, and then adopt zwitterion to mix bed and produce smart de-salted water, this method is recycled a large amount of metallurgical industry sewage on the one hand, sewage recycling and enterprise's sewage zero-discharge have been realized, can save a large amount of precious surface water or well water resource on the other hand, reduce production costs and realized sustained development of enterprises, its economic benefit and social benefit all are conspicuous.The present invention once drops into, and is benefited throughout the year, and running cost is low, and desalting effect is good, for the sewage recycling of recycling of metallurgy industry sewage and water-deficient area has been opened up a brand-new road.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Referring to Fig. 1, the inventive method is described in further detail.
The inventive method is suitable for metallurgy industry to be used, and gathers materials on the spot, water reuse, produces pure water with metallurgic sewage, its key step and act on as follows:
1. recovery sewage, produce middle water: reclaim the smelter effluent sewerage and go into settling tank, through flocculation, precipitation, the suspended substance that makes its water outlet is less than 100mg/l.
2. middle water treatment: for guaranteeing that ultra-filtration equipment normally moves, middle water after flocculation, precipitation process is through filtering less than the 1mm fine fack, remove the foreign material such as hair that may contain in the water, make COD less than 30mg/l, add clorox and carry out sterilization and disinfection, add flocculation agent again and carry out that little flocculation is laggard goes into the ultra-filtration membrane pond.
3. uf processing: the major function of uf processing is biological pollutant, particulate matter, colloid, turbidity, the bacterium of removing in the water, satisfies the influent quality requirement of reverse osmosis unit.Uf processing is divided into external-compression type uf processing technology and inner pressed uf processing, the present invention is according to the raw water quality that adopts, through repetition test relatively, determine to adopt external pressure immerseable uf processing technology, major advantage is as follows: 1. pair influent quality does not have particular requirement, 2. the pre-treatment effluent quality is good, and RO film system is not had influence substantially, can protect the RO film and use 5 years.3. occupation area of equipment is equivalent to 1/5 of conventional method, and 4. waste discharge is handled easily, and only regularly the conventional industrial sewage of discharging gets final product.The requirement that enters RO is satisfied in SDI＜2 of external pressure immerseable uf processing water outlet.
4. reverse osmosis (RO) is handled: the water after ultra-filtration equipment is handled enters reverse osmosis unit, the reverse osmosis unit major function is the salt that removes in the water, ratio of desalinization is greater than 97%, the pre-de-salted water rate of recovery 75% that the first-stage reverse osmosis device reclaims, go out electrical conductivity of water＜80 μ s/cm, can satisfy moisturizing of the cold rolling engineering recycle system and the requirement of ordinary student fisheries water.The de-salted water rate of recovery 90% that the two-pass reverse osmosis device reclaims goes out electrical conductivity of water＜10 μ s/cm, can satisfy cold rolling engineering band steel drift and wash requirement with the boiler house moisturizing, and the dense water of two-pass reverse osmosis is recovered into single stage desalting water and uses.
5. smart desalting treatment: smart desalting treatment is to be the water source with the two-pass reverse osmosis water outlet, mixes bed through zwitterion, produces the smart de-salted water of chloride ion content＜0.1mg/l, can satisfy the requirement of preparation emulsion.
Specific embodiment below is provided:
1. recovery metallurgic sewage, produce middle water: will smelt, the sewage of mill collects and enter distribution reservoir through promoting pumping plant, dosing polymerize aluminum chloride (PAC) also stirs, with polymerize aluminum chloride (PAC) and sewage thorough mixing, make water outlet reach the middle water requirement of suspension content＜50mg/l through precipitation, oil skimming.
2. middle water treatment: water in above-mentioned through the 1mm fine fack, is removed foreign material such as hair, after carry out dosing and regulate.For water suspension, colloid, organic clearance in improving, need to add a certain amount of flocculation agent, flocculation agent adopts polymerize aluminum chloride, and adding dose is 3-8mg/L, and organic clearance reaches 50-70%.For suppressing the breeding of bacterium in the water, need centering water to carry out germicidal treatment, sterilant adopts clorox, and adding dose is 1-3mg/L.Treated middle water COD is less than 30mg/l.
3. uf processing: adopt external pressure immerseable uf processing technology, water enters the ultrafiltration membrane cisterna in the last process, soak the external-compression type ultra-filtration membrane in the membrane cisterna, negative pressure-pumping by vacuum pump, water purification (ultrafiltration sees through liquid) is extracted out from the ultra-filtration membrane center, reaches SDI＜2 and satisfies the requirement that enters RO, sends into intermediate water tank, preparation enters next procedure, and dense water is stayed membrane cisterna and drained into network of drains at home and abroad.
4. reverse osmosis desalination is handled: (1) first-stage reverse osmosis: the qualified water after uf processing enters the first-stage reverse osmosis device.The water that is stored in the ultrafiltration product water tank is sent into reverse osmosis unit respectively through adding reductive agent and Scale inhibitors and the mixing of process line mixer, boosting through high-pressure pump.The discharging of reverse osmosis concentrated water trench, the reverse osmosis permeate water adds NaOH and regulates pH value 7.2～8.0, mixes through line mixer and is sent to the product pond, is stored in permeate water in the pre-desalination water tank after the transferpump lifting, be sent to and use water spot, all the other enter the two-pass reverse osmosis device by pipeline.Wherein, Scale inhibitors can be MDC220 efficient scale/dispersion agent that U.S. Bei Di company produces, and adding dosage is 4.79mg/l; Reductive agent adopts sodium bisulfite, dosing dosage 3mg/l.The pre-de-salted water ratio of desalinization that first-stage reverse osmosis is handled greater than 97%, go out water conductivity 80 μ s/cm, the rate of recovery 75%.Cooling rolls moisturizing of the engineering recycle system and ordinary student fisheries water.(2) two-pass reverse osmosis: be stored in first-stage reverse osmosis permeate water in the pre-desalination water tank and send into the two-pass reverse osmosis device by high-pressure pump and carry out desalination, permeate water enters the desalination water tank, and dense water returns the first-stage reverse osmosis device and handles.The two-pass reverse osmosis de-salted water rate of recovery 90% goes out electrical conductivity of water＜10 μ s/cm, and cooling rolls engineering band steel drift and washes usefulness with the boiler house moisturizing.
5. smart desalting treatment: smart desalination system is the water source with the two-pass reverse osmosis water outlet, mixes bed through zwitterion, produces the smart de-salted water of chloride ion content＜0.1mg/l, satisfies the requirement of preparation emulsion.Smart desalting plant adopts mixed ion exchanger, and acid-alkali regeneration system storage tank and ultra-filtration equipment are public.The positive resin that mixes the bed use adopts 001 * 7 strongly acidic styrene to mix the special-purpose Zeo-karb of bed, and negative resin adopts the special-purpose anionite-exchange resin of the mixed bed of 201 * 7 strong basicities.
Claims (4)
1. a method of utilizing metallurgic sewage to produce pure water is characterized in that, described method is undertaken by following operation:
A. reclaim sewage, produce middle water: get the metallurgy industry effluent sewerage through flocculation, precipitation, reach the middle water requirement of water suspension less than 100mg/l;
B. middle water treatment: water in above-mentioned through fine fack filtration, sterilization and disinfection, little flocculation treatment, is held back hair, remove partial organic substances, make its COD less than 30mg/l;
C. uf processing: the middle water of above-mentioned processing is immersed ultra-filtration equipment through external pressure handle, reach the requirement of SDI＜2;
D. reverse osmosis desalination is handled: the water after uf processing enters the reverse osmosis unit desalting treatment.
2. the method for utilizing metallurgic sewage to produce pure water according to claim 1, it is characterized in that: described reverse osmosis desalination is handled and is comprised the two-pass reverse osmosis desalting treatment, wherein, the pre-de-salted water ratio of desalinization that first-stage reverse osmosis is handled greater than 97%, go out electrical conductivity of water＜80 μ s/cm, the rate of recovery 75%, the de-salted water ratio of desalinization that two-pass reverse osmosis takes off processing greater than 97%, the rate of recovery 90%, go out water conductivity＜10 μ s/cm, the dense water of two-pass reverse osmosis is recovered into single stage desalting water and uses.
3. the method for utilizing metallurgic sewage to produce pure water according to claim 2, it is characterized in that: described secondary reverse osmosis desalination is provided with smart desalting treatment operation after handling, described smart desalting treatment operation is the water source with the two-pass reverse osmosis water outlet, mix bed through zwitterion, produce the smart de-salted water of chloride ion content＜0.1mg/l.
4. the method for utilizing metallurgic sewage to produce pure water according to claim 2 is characterized in that: the ultrafiltration product water during described first-stage reverse osmosis is handled adds reductive agent and Scale inhibitors enters reverse-osmosis treated again, the add-on 2-10mg/l of reductive agent and Scale inhibitors.
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| CNB2005100135103A CN100336746C (en) | 2005-05-12 | 2005-05-12 | Method of preparing pure water using metallurgic sewage |
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| CNB2005100135103A CN100336746C (en) | 2005-05-12 | 2005-05-12 | Method of preparing pure water using metallurgic sewage |
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| CN1699223A true CN1699223A (en) | 2005-11-23 |
| CN100336746C CN100336746C (en) | 2007-09-12 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400427C (en) * | 2006-01-24 | 2008-07-09 | 兰州大学 | Process of treating and utilizing acid waste water containing heavy metal |
| CN100450592C (en) * | 2007-02-15 | 2009-01-14 | 三达膜科技（厦门）有限公司 | Metal smelting factory sewage reclaiming method based on membrane filtering technique |
| CN101973655A (en) * | 2010-10-11 | 2011-02-16 | 浦坚 | Water desalting treatment process and device |
| CN102408165A (en) * | 2010-09-26 | 2012-04-11 | 中国石油化工股份有限公司 | Deep reusing method for municipal sewage reaching sewage discharge standards |
| CN102838227A (en) * | 2012-08-16 | 2012-12-26 | 浙江东发环保工程有限公司 | System and method for treating industrial park recycled water to form power plant boiler supplemental water |
| CN103214111A (en) * | 2013-04-02 | 2013-07-24 | 江苏一同环保工程技术有限公司 | Wet desulphurization wastewater treatment device for limestone and gypsum |
| CN104496079A (en) * | 2014-12-23 | 2015-04-08 | 北京桑德环境工程有限公司 | Treatment method for garbage leachate membrane concentrated solution |
| CN104649486A (en) * | 2014-06-24 | 2015-05-27 | 何叶 | Drinking water treatment method |
| CN104709991A (en) * | 2015-03-21 | 2015-06-17 | 唐山学院 | Treatment and recycling method for wastewater of metallurgy saw blade production |
| CN105712517A (en) * | 2016-04-11 | 2016-06-29 | 浙江碧源环保科技有限公司 | Copper-containing electroplating rinse wastewater treatment system and treatment process |
| CN106698760A (en) * | 2016-11-07 | 2017-05-24 | 厦门亿赛膜技术有限公司 | Smelting wastewater cyclic utilization system and method |
| CN112495186A (en) * | 2020-12-15 | 2021-03-16 | 无锡惠联热电有限公司 | Process for producing two-stage RO concentrated water through ultrafiltration |
Families Citing this family (1)
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| CN101667031B (en) * | 2008-09-02 | 2011-09-21 | 首钢京唐钢铁联合有限责任公司 | System and method for controlling coupled-type salt balance of industrial water systems |
Family Cites Families (5)
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| JP3304412B2 (en) * | 1992-09-11 | 2002-07-22 | 栗田工業株式会社 | Pure water production method |
| JP3376639B2 (en) * | 1993-05-27 | 2003-02-10 | 栗田工業株式会社 | Pure water recovery method from semiconductor cleaning wastewater |
| CN1240631C (en) * | 2003-09-15 | 2006-02-08 | 彩虹彩色显像管总厂 | Advanced treating technology for industrial sewage |
| CN1238281C (en) * | 2003-10-14 | 2006-01-25 | 王元强 | Fully-automatic middle-water deep purifying and regenerating water reuse apparatus and process |
| CN1262490C (en) * | 2004-04-09 | 2006-07-05 | 太原钢铁(集团)有限公司 | Reverse osmosis method for treating sewage |
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2005
- 2005-05-12 CN CNB2005100135103A patent/CN100336746C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400427C (en) * | 2006-01-24 | 2008-07-09 | 兰州大学 | Process of treating and utilizing acid waste water containing heavy metal |
| CN100450592C (en) * | 2007-02-15 | 2009-01-14 | 三达膜科技（厦门）有限公司 | Metal smelting factory sewage reclaiming method based on membrane filtering technique |
| CN102408165A (en) * | 2010-09-26 | 2012-04-11 | 中国石油化工股份有限公司 | Deep reusing method for municipal sewage reaching sewage discharge standards |
| CN101973655A (en) * | 2010-10-11 | 2011-02-16 | 浦坚 | Water desalting treatment process and device |
| CN102838227A (en) * | 2012-08-16 | 2012-12-26 | 浙江东发环保工程有限公司 | System and method for treating industrial park recycled water to form power plant boiler supplemental water |
| CN103214111A (en) * | 2013-04-02 | 2013-07-24 | 江苏一同环保工程技术有限公司 | Wet desulphurization wastewater treatment device for limestone and gypsum |
| CN104649486B (en) * | 2014-06-24 | 2016-06-15 | 何叶 | Drinking water treatment method |
| CN104649486A (en) * | 2014-06-24 | 2015-05-27 | 何叶 | Drinking water treatment method |
| CN104496079A (en) * | 2014-12-23 | 2015-04-08 | 北京桑德环境工程有限公司 | Treatment method for garbage leachate membrane concentrated solution |
| CN104709991A (en) * | 2015-03-21 | 2015-06-17 | 唐山学院 | Treatment and recycling method for wastewater of metallurgy saw blade production |
| CN105712517A (en) * | 2016-04-11 | 2016-06-29 | 浙江碧源环保科技有限公司 | Copper-containing electroplating rinse wastewater treatment system and treatment process |
| CN106698760A (en) * | 2016-11-07 | 2017-05-24 | 厦门亿赛膜技术有限公司 | Smelting wastewater cyclic utilization system and method |
| CN112495186A (en) * | 2020-12-15 | 2021-03-16 | 无锡惠联热电有限公司 | Process for producing two-stage RO concentrated water through ultrafiltration |
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| CN100336746C (en) | 2007-09-12 |
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