CN101074131A - Method and system for recovering, reutilizing and treating electroplating water - Google Patents
Method and system for recovering, reutilizing and treating electroplating water Download PDFInfo
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Abstract
A method and system for recovering and treating electroplating water has electroplating water zero discharge and saves water resources. Pre-treated electroplating water is induced into treatment recovering system with multi-normal water treating devices for secondary treatment.
Description
Technical field
The present invention relates to a kind of electroplating water recovery and treatment method and handle reclaiming system, particularly a kind of method and treatment system that realizes the secondary water treatment of electroplating water zero release.
Background technology
Because the in short supply day by day and trade effluent of water resources is to the influence of environment, the trade effluent especially zero release of electroplating wastewater is to administer one of major objective of three industrial wastes discharging always.But present most of electroplating enterprises all are with the directly discharging of electroplating wastewater processing back up to standard, the consequence that causes thus is both to have wasted great lot of water resources, still residual in water up to standard simultaneously have micro-objectionable impurities row to environment, and long-term accumulation still can form environment and pollute.In the practice, it would be desirable factory effluent is carried out reuse after treatment, realize zero discharge of industrial waste water.
Chinese patent 2006100961339 discloses " a kind of clean preparation method for the treatment of electroplating waste water by nano filtering process ", this method has only solved the problem that the electroplating wastewater of being discharged by coating bath is handled the back reuse, in its tangible electroplating industry, a large amount of waste water is the Cleaning Wastewater of plated item, usually this part water accounts for the 3/5-4/5 of whole electroplating wastewater, and the coating bath rinse water only account for whole 1/5-2/5.Therefore, be far from being enough only with this part waste water recycling.
Chinese patent 2006100330473 discloses a kind of " zero-release recovery method for electroplated sewage and device thereof ", this method and device are divided into five classes with electroplating wastewater and handle respectively, solid phase is reclaimed, and liquid phase is through further reclaiming clear water after filtration or the ion-exchange.There are following deficiency in this method and device: at first, whole waters are not recycled in the waste water of its recycling, the ground waste water such as production plant wherein contains a large amount of objectionable impuritiess, as not treated then can not direct reuse, do not meet emission standard yet.Secondly, the water that all can have part not cross nearly 1/5-1/3 in water or wash-down water, especially the reverse osmosis machine treating processes in the liquid filtration process usually can't pass reverse osmosis membrane, otherwise can increase processing cost greatly.And do not contain a large amount of ions or other impurity in the water of film excessively in this section, and though this part water might reach emission standard, can efflux, weigh with the standard of zero release, then be not reach " mark ".The 3rd, the electroplating assembly line water is levels of the standard with the fully recovering water treatment, or is that the operation that has can not be used because of different operations need the water of different standards (rank), needs water intaking in addition.Be to be that the water of higher level makes its requirement that can satisfy any one process water, but can increase processing costs greatly like this whole wastewater treatments.The 4th, supplementary feed source, existing plating enterprise, usually by tap water as supplementary feed, if natural rainwater catchment system then can be able to be saved a large amount of tap water,, be a very significant thing to the existing a large amount of water-deficient areas of China.
Summary of the invention
The present invention is directed to the deficiency that above-mentioned prior art exists, proposed the full recovery and treatment method of a kind of electroplating water, adopt method of the present invention treated electroplating water fully recovering up to standard can be realized the electroplating water zero release of real meaning.In addition, the present invention also provides the electroplating water of realizing the full recycling of electroplating water to handle reclaiming system.
The full recovery and treatment method of a kind of electroplating water of the present invention comprises the electroplating water classification is handled to the emission compliance water quality standard that it is two classes that above-mentioned water up to standard is compiled, and first kind water is to handle to contain chromium, nickel or other heavy metal wastewater thereby gained water up to standard; The second class water is to handle to contain acid and/or alkali waste water gained water up to standard; It is characterized in that: first kind water is carried out reverse-osmosis treated respectively behind sand filtration, active carbon filtration, wherein the pure water by reverse osmosis membrane is divided into two portions, a part enters the production line coating bath as water of productive use, and another part passes through a mixed bed back of being made up of resin anion(R.A) and resin cation (R.C.) as boiler feed water; Do not return the wastewater disposal basin of preprocessing system by the dense water of reverse osmosis membrane; The described second class water directly enters the production line cleaning sink respectively behind sand filtration, active carbon filtration.
The full recovery and treatment method of described electroplating water is characterized in that adopting when described first kind water carries out reverse-osmosis treated two steps ro to handle, and the volumn concentration of resin anion(R.A) is 60-70% in the described mixed bed; The volumn concentration of resin cation (R.C.) is 30-40%.
The full recovery and treatment method of described electroplating water is characterized in that described first kind electrical conductivity of water≤3000 μ s, through the specific conductivity≤30 μ s of the pure water after the reverse-osmosis treated of the second stage, and the specific conductivity≤0.20 μ s of the boiler feed water after the overmulling bed is handled; The second class electrical conductivity of water≤1000 μ s, the electrical conductivity of water that enters the production line rinse bath after treatment are 100-300 μ s.
The full recovery and treatment method of described electroplating water, the supply water that it is characterized in that described electroplating water adopt the natural rainwater through collecting directly to mix in the first kind water and/or the second class water and handle thereupon.
A kind of electroplating water of the full recovery and treatment method of electroplating water of realizing is handled reclaiming system, comprising classifies electroplating water is treated to the preprocessing system that meets discharging standards, it is characterized in that the sand-bed filter that has that links to each other with electroplating water preprocessing system rising pipe, what link to each other with the sand-bed filter water outlet is charcoal filter, the water-in of reverse-osmosis treated machine links to each other with charcoal filter by pipeline, the water outlet of reverse-osmosis treated machine links to each other with the mixed bed of being made up of resin anion(R.A) and resin cation (R.C.) with production line coating bath retention basin respectively, and the water outlet of described charcoal filter also links to each other with a production line rinse bath retention basin.
Described electroplating water is handled reclaiming system, it is characterized in that described reverse-osmosis treated machine comprises first-stage reverse osmosis handler and the two-pass reverse osmosis handler that is linked to each other by pipeline, wherein the water-in of first-stage reverse osmosis handler links to each other with the water outlet of charcoal filter, and the water outlet of two-pass reverse osmosis handler links to each other with the mixed bed of being made up of resin anion(R.A) and resin cation (R.C.) with production line coating bath retention basin respectively.
Described electroplating water is handled reclaiming system, it is characterized in that the volumn concentration of resin anion(R.A) in the described mixed bed is 60-70%, and the volumn concentration of resin cation (R.C.) is 30-40%.
Described electroplating water reclaiming system is characterized in that second charcoal filter that is provided with second sand-bed filter and links to each other with second sand-bed filter; Described electroplating water preprocessing system comprises the first kind water aggregating apparatus and the second class water aggregating apparatus, wherein first kind water aggregating apparatus compiles from processing and contains chromium, nickel or other heavy metal wastewater thereby gained water up to standard, and its water outlet links to each other with the water-in of sand-bed filter; The second class water aggregating apparatus compiles from processing and contains acid and/or contain alkali waste water gained water up to standard, and the water-in of its water outlet and second sand-bed filter joins, and the water outlet of second charcoal filter and production line rinse bath retention basin join.
Described electroplating water is handled reclaiming system, it is characterized in that having a rainwater aggregating apparatus to compile rainwater from the roof, and the water outlet of described rainwater aggregating apparatus links to each other with the water-in of sand-bed filter.
Described electroplating water is handled reclaiming system, it is characterized in that having a rainwater aggregating apparatus to compile rainwater from the roof, and the water outlet of described rainwater aggregating apparatus joins with the water-in of the first kind water aggregating apparatus and the second class water aggregating apparatus respectively.
The full recovery and treatment method of electroplating water of the present invention, carry out the secondary stage treatment after will the emission compliance water after preprocessing system is handled compiling, treating water according to the different purposes reuse different stages of production line, make electroplating water both obtain all rationally reuses, can reduce cost to greatest extent again and reduce processing links.In the method for the present invention with the rainwater collected as supplementary feed, can realize that the on-site water is all self-sufficient, and save a large amount of tap water and water rate.Adopt the water of productive use of electroplating on-site after the method for the present invention to obtain fully recovering, realized electroplating water zero release truly.
Electroplating water of the present invention is handled reclaiming system, and conventional water treatment device is made up, and making it becomes the dedicated water treatment system that a cover is suitable for handling electroplating water, and equipment constitutes simple, and cost is low, and the operation and maintenance cost is also very low.Being suitable for large and medium-sized electroplating enterprise uses.
Description of drawings
Fig. 1 is that electroplating water of the present invention is handled the reclaiming system schema
Embodiment
Below in conjunction with accompanying drawing the present invention is described in detail.
The full recovery and treatment method of electroplating water of the present invention, will through preprocessing system handle and the electroplating water that reached the National Environmental emission standard to compile be two classes, first kind water is to handle the emission compliance water that the waste water contain chromium, nickel, copper or other metal obtains, this class waste water comprises the rinse water from production lines such as chromium plating or nickel or copper, coating bath water or trickle down the surface water on ground, it accounts for about the about 1/5-2/5 of full scale production water consumption.They compile into a retention basin after handling through classification.Heavy metal content satisfies national specified discharge standard fully less than 1.6 milligrams in this part treated water.But because of wherein containing part salinity and micro heavy residual in the pre-treatment process, its specific conductivity can not satisfy the requirement of production line water about 1500-3000 μ s.
The second class water is to handle the water up to standard that contains acid or alkali waste water gained.It mainly is to clean the water that plating piece is discharged in the production process that this class contains acid, alkali waste water, comprises plating preceding rinse water, acid washing water and contains alkali waste water etc., and this part water accounts for about the about 3/5-4/5 of electroplating water total amount.Handle its specific conductivity of back greatly about about 1000 μ s through preprocessing system.
Above-mentioned two class water all belong to emission compliance water, and it can mix the back and do next step processing, also can handle respectively.Because above-mentioned two class water conductivities differ bigger, contained ion component difference in the two class water, and the water yield of the second class water is bigger, specific conductivity is low, only need to be back to production line, therefore, above-mentioned two class water are handled the reuse better effects if respectively again through simple process.
Wherein behind first kind water process sand-bed filter and the charcoal filter, further make reverse-osmosis treated by reverse osmosis machine.Treating water by reverse osmosis membrane is a pure water, and its specific conductivity has met coating bath water supply standard in the production line less than 30 μ s.Therefore, this part water major part through reverse-osmosis treated (about 80%) is back to coating bath.After another small portion water (about 20%) was then handled by a mixed bed of being made up of resin anion(R.A) and resin cation (R.C.), specific conductivity was less than 0.20 μ s, as the boiler feed water reuse.Then do not return the wastewater disposal basin of preprocessing system, handle again by the dense water of reverse osmosis membrane.
In order to improve reverse-osmosis treated efficient, can adopt the reverse-osmosis treated machine of two polyphones to carry out bi-level treatment, a middle tank can be set between two reverse-osmosis treated machines connect by pipeline.Reverse osmosis membrane adopts common reverse osmosis membrane, as cellulose acetate membrane, and aromatic polyamide membrane etc.
The second class water is then through behind second sand-bed filter and second charcoal filter, and specific conductivity reaches or less than 100-300 μ s, meets production line water for cleaning standard, but fully recovering.
Be connected by pipeline between above-mentioned sand-bed filter and preprocessing system rising pipe and sand-bed filter and charcoal filter, flow dynamic wherein can be provided or directly be solved with lift pump by drop.Described sand-bed filter adopts water purification standard quartz sand, granularity 0.2-10mm, and classification (layer) is provided with, from bottom to top, from fine to coarse.It is the activated carbon of raw material production that described charcoal filter preferably adopts nutshell.Particle diameter is about 0.8-0.9mm.The thickness of whole active carbon filtration layer is 1-1.5 rice.
So-called mixed bed is about to resin anion(R.A) and places an ion exchange column by a certain percentage with resin cation (R.C.), will contain ionic water by after mixing bed, and the negative ions in two kinds of resin difference planar water reaches the water purifying purpose.The resin of selecting for use in the mixed bed of the present invention adopts conventional water treatment to get final product with resin, and particularly the effect of strong acid and strong base resin is better.The ratio of two kinds of resins is resin anion(R.A) 60-70% (volume); Resin cation (R.C.) 30-40% (volume).
Also be provided with a roof rain water collecting device in system, it is made up of rainwater collection tube and stormwater tank, and the water outlet of stormwater tank connects the water-in of sand-bed filter or connects first kind water aggregating apparatus respectively and the water-in of the second class water aggregating apparatus.Promptly by the nourishment source of rainwater as the water of productive use loss.Another part of rainwater can be by the national drinking water standard producting rule, after filtration, sterilization etc. handles the back and use as domestic water.So, can save the tap water make up system fully.Realize the Electroplating Production water zero discharge, the zero tap water supply of productive life water.Unnecessary rainwater can be used to water flowers and plants, trees, sprays ground etc., also can directly efflux.
The medium-sized Electroplate Factory of embodiment, 500 tons of daily water consumptioies mainly carry out chromium plating, nickel, copper operation.Above-mentioned electroplating wastewater is after preprocessing system is classified processing, and the emission compliance water that processing nickel-containing waste water, chromate waste water, copper-containing wastewater are obtained compiles in the water storage device, is called first kind water aggregating apparatus; The emission compliance water that Cleaning Wastewater before the processing plating is obtained compiles in another water storage device, is called the second class water aggregating apparatus.It is the water treatment standard quartz sand of 0.2-10mm that sand-bed filter adopts granularity,, from fine to coarse, is divided into ten layers from bottom to top.Sand-bed filter is connected by pipeline with first kind water aggregating apparatus.Charcoal filter, adopting by nutshell is the activated carbon of raw material production.Present embodiment adopts coconut palm shell system activated carbon.Particle diameter 0.8-0.9mm, activated carbon layer thickness 1-1.5 rice.Its with sand-bed filter between be connected by pipeline.And the sand-bed filter bottom is higher than the charcoal filter top layer, thus, can be the two flow dynamic is provided.Flow velocity is 10 meters/hour.The reverse-osmosis treated machine that links to each other with charcoal filter adopts two polyphones to form (if it is less to handle the water yield, or the processing standard is lower, then adopts a reverse osmosis machine to get final product).The common cellulose acetate membrane of reverse osmosis membrane.An intermediate water tank is set between two reverse osmosis machines.The major part that sees through the pure water of reverse osmosis membrane is back to use the production line coating bath.Small portion water (accounting for 20%) enters a mixed bed and further handles back boiler of feeding usefulness.It is resin that resin anion(R.A) in the mixed bed and resin cation (R.C.) adopt the common stupid second of strong acid (alkali) type rare.Wherein resin anion(R.A) accounts for 66% volume, and resin cation (R.C.) accounts for 34% volume.The dense water that sees through reverse osmosis membrane need return the wastewater disposal basin of preprocessing system and handle because of wherein heavy metal and other objectionable impurities enrichment.Native system is mainly handled from containing the weight metal water in the first kind water aggregating apparatus.The about 150-200 ton of day output.
The second class water aggregating apparatus can overlap treatment system with first kind water shared one, but can add high throughput like this because of wherein mainly being that its impurity concentration is not high from the water up to standard of handling acidic and alkaline waste water, increases cost.Therefore, other establishes cover sand-bed filter and an activated carbon filter systems, the water of the second class water aggregating apparatus is carried out simple filtering can reach the reuse of production line rinse water standard.This cover sand-bed filter is identical with the device of handling first kind water with charcoal filter.This part water treatment amount is bigger, day about 300-350 ton of processing.
The rainwater aggregating apparatus is that roof water is collected to a rainwater retention basin by downcomer, is mainly used in the loss that replenishes the production line water.It is directly introduced the first kind water aggregating apparatus and the second class water aggregating apparatus handles with it and gets final product.The rainwater of all the other collections can be used for daily life after sterilization, purifying treatment reach national domestic water hygienic standard.Also can be directly used in pouring flowers and plants, trees, spray ground etc.
Claims (10)
1, the full recovery and treatment method of a kind of electroplating water comprises the electroplating water classification is handled to the emission compliance water quality standard that it is two classes that above-mentioned water up to standard is compiled, and first kind water is to handle to contain chromium, nickel or other heavy metal wastewater thereby gained water up to standard; The second class water is to handle to contain acid and/or alkali waste water gained water up to standard; It is characterized in that: first kind water is carried out reverse-osmosis treated respectively behind sand filtration, active carbon filtration, wherein the pure water by reverse osmosis membrane is divided into two portions, a part enters the production line coating bath as water of productive use, and another part passes through a mixed bed back of being made up of resin anion(R.A) and resin cation (R.C.) as boiler feed water; Do not return the wastewater disposal basin of preprocessing system by the dense water of reverse osmosis membrane; The described second class water directly enters the production line cleaning sink respectively behind sand filtration, active carbon filtration.
2, according to the full recovery and treatment method of electroplating water of claim 1, it is characterized in that adopting when described first kind water carries out reverse-osmosis treated two steps ro to handle, the volumn concentration of resin anion(R.A) is 60-70% in the described mixed bed; The volumn concentration of resin cation (R.C.) is 30-40%.
3, according to the full recovery and treatment method of electroplating water of claim 2, it is characterized in that described first kind electrical conductivity of water≤3000 μ s, through the specific conductivity≤30 μ s of the pure water after the reverse-osmosis treated of the second stage, the specific conductivity≤0.20 μ s of the boiler feed water after the overmulling bed is handled; The second class electrical conductivity of water≤1000 μ s, the electrical conductivity of water that enters the production line rinse bath after treatment are 100-300 μ s.
4, according to claim 1,2 or 3 the full recovery and treatment method of electroplating water, the supply water that it is characterized in that described electroplating water adopts the natural rainwater through collecting directly to mix in the first kind water and/or the second class water and handles thereupon.
5, a kind of electroplating water of the full recovery and treatment method of electroplating water of realizing is handled reclaiming system, comprising classifies electroplating water is treated to the preprocessing system that meets discharging standards, it is characterized in that the sand-bed filter that has that links to each other with electroplating water preprocessing system rising pipe, what link to each other with the sand-bed filter water outlet is charcoal filter, the water-in of reverse-osmosis treated machine links to each other with charcoal filter by pipeline, the water outlet of reverse-osmosis treated machine links to each other with the mixed bed of being made up of resin anion(R.A) and resin cation (R.C.) with production line coating bath retention basin respectively, and the water outlet of described charcoal filter also links to each other with a production line rinse bath retention basin.
6, handle reclaiming system according to the electroplating water of claim 5, it is characterized in that described reverse-osmosis treated machine comprises first-stage reverse osmosis handler and the two-pass reverse osmosis handler that is linked to each other by pipeline, wherein the water-in of first-stage reverse osmosis handler links to each other with the water outlet of charcoal filter, and the water outlet of two-pass reverse osmosis handler links to each other with the mixed bed of being made up of resin anion(R.A) and resin cation (R.C.) with production line coating bath retention basin respectively.
7, handle reclaiming system according to the electroplating water of claim 6, it is characterized in that the volumn concentration of resin anion(R.A) in the described mixed bed is 60-70%, the volumn concentration of resin cation (R.C.) is 30-40%.
8,, it is characterized in that second charcoal filter that is provided with second sand-bed filter and links to each other with second sand-bed filter according to claim 5,6 or 7 described electroplating water reclaiming systems; Described electroplating water preprocessing system comprises the first kind water aggregating apparatus and the second class water aggregating apparatus, wherein first kind water aggregating apparatus compiles from processing and contains chromium, nickel or other heavy metal wastewater thereby gained water up to standard, and its water outlet links to each other with the water-in of sand-bed filter; The second class water aggregating apparatus compiles from processing and contains acid and/or contain alkali waste water gained water up to standard, and the water-in of its water outlet and second sand-bed filter joins, and the water outlet of second charcoal filter and production line rinse bath retention basin join.
9, handle reclaiming system according to claim 5,6 or 7 electroplating water, it is characterized in that having a rainwater aggregating apparatus to compile rainwater from the roof, the water outlet of described rainwater aggregating apparatus links to each other with the water-in of sand-bed filter.
10, handle reclaiming system according to the electroplating water of claim 8, it is characterized in that having a rainwater aggregating apparatus to compile rainwater from the roof, the water outlet of described rainwater aggregating apparatus joins with the water-in of the first kind water aggregating apparatus and the second class water aggregating apparatus respectively.
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| CNB2007101306777A CN100572298C (en) | 2007-07-16 | 2007-07-16 | Full recovery and treatment method of electroplating water and processing reclaiming system |
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| CNB2007101306777A CN100572298C (en) | 2007-07-16 | 2007-07-16 | Full recovery and treatment method of electroplating water and processing reclaiming system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102050536A (en) * | 2010-12-03 | 2011-05-11 | 东莞市可迪环保科技有限公司 | Process for treating electroplating wastewater |
| CN101570372B (en) * | 2009-05-05 | 2011-06-08 | 中国科学院长春应用化学研究所 | Method for purifying electroplating wastewater and comprehensively utilizing resources |
| CN102092877A (en) * | 2011-01-05 | 2011-06-15 | 富毅特（上海）环保科技有限公司 | System for comprehensively recycling waste water |
| CN102206012A (en) * | 2011-04-21 | 2011-10-05 | 吴欲 | Water-saving device for electroplating production line |
| CN102329030A (en) * | 2011-09-06 | 2012-01-25 | 冯云香 | Treatment method of chemical nickel-plating wastewater |
| CN103951108A (en) * | 2014-04-25 | 2014-07-30 | 深圳市天净环境科技发展有限公司 | Process method for treating electroplating comprehensive wastewater |
| CN104961197A (en) * | 2015-06-18 | 2015-10-07 | 广东嘉元科技股份有限公司 | Water-saving process and water-saving device for treating copper foil wastewater |
| CN107344776A (en) * | 2017-08-07 | 2017-11-14 | 东莞市希锐自动化科技股份有限公司 | A kind of water processing system of environmentally friendly surface-treatment line |
| CN111704302A (en) * | 2020-07-07 | 2020-09-25 | 株洲岱勒新材料有限责任公司 | Electroplating wastewater zero-discharge treatment method and equipment thereof |
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| TWI655325B (en) * | 2018-06-20 | 2019-04-01 | 泰威興業股份有限公司 | Electroplating equipment |
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- 2007-07-16 CN CNB2007101306777A patent/CN100572298C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570372B (en) * | 2009-05-05 | 2011-06-08 | 中国科学院长春应用化学研究所 | Method for purifying electroplating wastewater and comprehensively utilizing resources |
| CN102050536B (en) * | 2010-12-03 | 2012-06-27 | 东莞市可迪环保科技有限公司 | Process for treating electroplating wastewater |
| CN102050536A (en) * | 2010-12-03 | 2011-05-11 | 东莞市可迪环保科技有限公司 | Process for treating electroplating wastewater |
| CN102092877B (en) * | 2011-01-05 | 2013-07-03 | 富毅特（上海）环保科技有限公司 | System for comprehensively recycling waste water |
| CN102092877A (en) * | 2011-01-05 | 2011-06-15 | 富毅特（上海）环保科技有限公司 | System for comprehensively recycling waste water |
| CN102206012A (en) * | 2011-04-21 | 2011-10-05 | 吴欲 | Water-saving device for electroplating production line |
| CN102206012B (en) * | 2011-04-21 | 2013-10-16 | 吴欲 | Water-saving device for electroplating production line |
| CN102329030B (en) * | 2011-09-06 | 2013-03-27 | 冯云香 | Treatment method of chemical nickel-plating wastewater |
| CN102329030A (en) * | 2011-09-06 | 2012-01-25 | 冯云香 | Treatment method of chemical nickel-plating wastewater |
| CN103951108A (en) * | 2014-04-25 | 2014-07-30 | 深圳市天净环境科技发展有限公司 | Process method for treating electroplating comprehensive wastewater |
| CN104961197A (en) * | 2015-06-18 | 2015-10-07 | 广东嘉元科技股份有限公司 | Water-saving process and water-saving device for treating copper foil wastewater |
| CN107344776A (en) * | 2017-08-07 | 2017-11-14 | 东莞市希锐自动化科技股份有限公司 | A kind of water processing system of environmentally friendly surface-treatment line |
| CN111704302A (en) * | 2020-07-07 | 2020-09-25 | 株洲岱勒新材料有限责任公司 | Electroplating wastewater zero-discharge treatment method and equipment thereof |
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| CN100572298C (en) | 2009-12-23 |
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