CN101070215B - Electroplating waste-water reutilizing process - Google Patents
Electroplating waste-water reutilizing process Download PDFInfo
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- CN101070215B CN101070215B CN200610034757A CN200610034757A CN101070215B CN 101070215 B CN101070215 B CN 101070215B CN 200610034757 A CN200610034757 A CN 200610034757A CN 200610034757 A CN200610034757 A CN 200610034757A CN 101070215 B CN101070215 B CN 101070215B
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Abstract
This invention relates to breadboard wastewater reclamation craft.Introduce each wastewater electroplating workshop into mixing pool, reduction or oil and water separation, after precipitation then through microfilter, ultrafilter and nano colander for pretreatment filter, pass recovery system, and the generated water is reclaimed to workshop used for water of production; flow tank sludge dewatering, then move out for disposing; high COD wastewater and first order reverse osmosis department thick water can reach discharging standard after wastewater treatment system. Cyanogen department wastewater after mixing enter ion-exchange system, generated water is introduced to neutralization tank; actified solution of ion-exchange system generate sodium hydroxide by sulphur electrolysis, then is introduced to neutralization tank, and neutralize with acid and pyrophosphoric acid cuprum that batch discharged by electroplating workshop, stay in delaying pool after a certain time, be send to balancing tank.
Description
Technical field
The present invention relates to a kind of waste-water reutilizing process of reducing waste, particularly a kind of electroplating wastewater subtracts useless reuse technology
Background technology
Electroplating industry is the important component part of cultural industry, and the raising inevitable requirement of Economic development, the people's material and cultural life level is electroplated industry and adapted with it.Many places are confirmed as the urban type industry to plating, have more promoted to electroplate the critical role in regional economy; Yet the environmental pollution that electroplating industry is brought also is very serious, and according to incompletely statistics, producer is only electroplated in the whole nation just has family more than 10,000, and annual electroplating wastewater of discharging has 4,500,000,000 m approximately
3, be equivalent to the tap water supply amount of domestic several big and medium-sized cities, make the shortage of water resources and pollution of waterhead become more serious, the processing that waste water is subtracted useless reuse seems very important.
Summary of the invention
The objective of the invention is provides a kind of electroplating wastewater to subtract useless reuse technology in order to solve above-mentioned deficiency.
The objective of the invention is to realize: the electroplating waste-water reutilizing system process through following technical scheme; By each waste water system of plating shop; Separately introduce and respectively mix well the pond, processing such as reduction or oily water separation, post precipitation filters through pre-treatment such as micro-filter, ultra-fine filter, nanofiltration devices; Pass through recovery system again, water of productive use is made in its effluent reuse to workshop; Committee is outer after the settling tank sludge dewatering handles; High-COD waste water is through the Waste Water Treatment qualified discharge; Cyanogen is waste water; After mixing well, get into ion exchange system; Produce water and introduce neutralization tank; The regenerated liquid of ion exchange system is also introduced the acid and the cupric pyrophosphate neutralization of neutralization tank and plating shop batch discharging after sulphur ionization electrolysis generates sodium hydroxide, after delaying basin stops certain hour, be delivered to the recovery wastewater equalization pond then; Oil removing waste water acidification reaction, post precipitation after oily water separation are introduced and are comprehensively mixed well the pond, and committee is outer after the sludge dewatering handles; Chromate waste water is after mixing well, and hexavalent chrome reduction becomes the trivalent chromium introducing comprehensively to mix well the pond; The pond is comprehensively mixed well in acid waste water direct introducing after mixing well; Cupric, nickel, zinc and other waste water are comprehensively mixed well the pond from the direct introducing of plating shop; The waste water adjustment pH value of comprehensively mixing well the pond to neutral after mix soon, mix slowly, post precipitation introduce in the middle of the pond, committee is outer after the sludge dewatering handles; Through the middle pond waste water after the handled of front, micro-strainer, ultra-fine filter or nanofiltration after pre-filtering is handled get into recovery system and are recycled to workshop plating line water.Its flow process is following:
Below be performance evaluation:
One, the kind of waste water and the water yield
1. cyanide wastewater: 200m
3/ day, 2. chromate waste water: 50m
3/ day, 3. other is nickeliferous, sour, alkali etc.: 350m
3/ day amounts to 600m
3/ day, 30m
3/ hr, the activity duration is in 20hrs/day
Two, water recycling target
1. the recovery: so that 75～80% designs of the wastewater flow rate that reclaims economic benefit to be arranged.
2. recycle-water water quality: conductance is superior to tap water and can reaches below the 20 μ s/cm, recyclablely generally uses with water spot to processing procedure.
3. the mud generation is handled than traditional chemical and is reduced 1/3～1/2.
Assessment of economic benefit
Prussiate treatment system economic benefit
Cyanogen is waste water water yield 200CMD CN
-Concentration 100ppm=>Then discharge CN every day
-Be 20kg
One, traditional type is handled and is added first oxidation, the second oxide treatment unit flow processs such as drift ice, liquid caustic soda, acid
Required use 1, NaOCl expense are 20 * 150 * 1=3,000 yuan
2, NaOH is about 120 yuan
3, H
2SO
4About 100 yuan
Amount to: 3,000
+120+100=3,220 yuan/day
Two, adopt the prussiate processing mode of eastern first electroplating waste-water reutilizing novel process
Process cost only needs the electricity charge 400 degree/skies *=320 yuan/day of 0.8 yuan/degree
Economic benefit can economize 3 every day, 220-320=2,900 yuan/da
Water reclaims the economic benefit overall evaluation
A, the conventional process system water yield are with 600m
3/ day meter
Add up to conventional process system operation cost: 3,500 yuan/day of 1 day process cost [not containing the electricity charge and maintenance cost]
B, employing electroplating wastewater return process system
Add up to adopt and newly establish water reclamation system: process cost was 1,975 yuan/day in 1 day
Amount to 1 year price difference (2,900+3,500-1,975) unit/m
3The follow-up pure water equipment expense and the process cost of 1,416,000 yuan/year+saving of * 320 days/≒
The electroplating wastewater treatment reclaiming technique system has following advantage:
1, directly reclaims in the online subitem water intaking of plating shop; Because though the water of drain has reached emission standard; But contained hetero-ion amount increases owing in wastewater treatment process, having added various medicaments in the water, and its specific conductivity has also increased quite a few times, and qualified discharge water is generally at 10000us/cm
2About, and the specific conductivity of each serial waste water of workshop is generally at 3000us/cm
2Below, will increase the processing load in the back segment recovery system like this, film is dirty stifled fast, reduces the recovery system life-span, and some months will be changed filtering membrane, and cost recovery increases to the user and can't accept.Once more, reclaim in the water intaking of qualified discharge mouth, exist the processing costs of repetition wastewater to reach standard and the recycling expense of processing costs, this reclaims technology and directly reclaims in the online subitem water intaking of plating shop, solves these problems.
2, the recovery is high, electroplate whole factory waste water 75%-95% recovery water quality and be stabilized in below the 20 μ s/cm, but the electroplating technology water is made in reuse, reaches the purpose of recycle water resources.
3, minimum operation cost, the tap water cost, the environment maintenance cost reduces, and one ton of its cost of electroplating wastewater of reuse is no more than 2.5 yuans.
4, has good economic benefit, recyclable just being set as originally in the 1-3
5, the system design life-span is more than 20 years
The system of this project exploitation is mainly used in and handles electroplating wastewater and with reuse after most of wastewater treatment.About 4,500,000,000 m3 of waste water of the annual discharge of China Electroplate Factory at present.Conventional treatment methods such as chemical method are the contaminated solution problem at all, and government over the years and enterprise investment reach tens billion of units on the waste water treatment project.All there are strong will in government and enterprise, and hope can have suitable electroplating waste water treatment technology to solve the waste discharge problem of long-term puzzlement electroplating enterprise.The waste water of electroplating enterprise discharging had both made and has had only 5% waste water to adopt eastern its market outlook of first electroplating waste-water reutilizing process also considerable.Engineering according to oneself builds is calculated, the Sino-Japan reuse 450m of whole factory electroplating wastewater of 600T/D
3About 3,000,000 yuan of reclaiming system reclamation rate 75% investment, do not establish reclaiming system before, it is 6400 yuan of every days that wastewater to reach standard is handled running cost; And it is existing with after the recovery system; The running cost of its every day is 1975 yuan, 4425 yuan/day * 320 days/year ≈ 1,416 of price difference every day; 000 yuan/year, just be set as this with regard to recyclable about 2 years.Therefore, environment protection has been mentioned under the situation of suitable height in country, country more paid attention to situation that water price also improves year by year to water saving under, metal plating waste water adopted the enthusiasm of this waste water recycling novel process to improve constantly.The electroplating waste-water reutilizing novel technique will have great market at waste water reclaiming, waste water recycling with in reducing production costs, and its environmental benefit and social benefit are very significantly.
Specific embodiment
Below in conjunction with technology the present invention is described further:
By each waste water system of plating shop, separately introduce and respectively mix well the pond, processing such as reduction or oily water separation, post precipitation filters through pre-treatment such as micro-filter, ultra-fine filter, nanofiltration devices, passes through recovery system again, and water of productive use is made in its effluent reuse to workshop; Committee is outer after the settling tank sludge dewatering handles; The dense water of high-COD waste water and first step r-o-system is through the Waste Water Treatment qualified discharge.Cyanogen is waste water, after mixing well, gets into ion exchange system, produces water and introduces neutralization tank; The regenerated liquid of ion exchange system is also introduced the acid and the cupric pyrophosphate neutralization of neutralization tank and plating shop batch discharging after sulphur ionization electrolysis generates sodium hydroxide, after delaying basin stops certain hour, be delivered to the recovery wastewater equalization pond then; Oil removing waste water acidification reaction, post precipitation after oily water separation are introduced and are comprehensively mixed well the pond, and committee is outer after the sludge dewatering handles; Chromate waste water is after mixing well, and hexavalent chrome reduction becomes the trivalent chromium introducing comprehensively to mix well the pond; The pond is comprehensively mixed well in acid waste water direct introducing after mixing well; Cupric, nickel, zinc and other waste water are comprehensively mixed well the pond from the direct introducing of plating shop; The waste water adjustment pH value of comprehensively mixing well the pond to neutral after mix soon, mix slowly, post precipitation introduce in the middle of the pond, committee is outer after the sludge dewatering handles; Through the middle pond waste water after the handled of front, handle back micro-strainer, ultra-fine filter or nanofiltration through pre-filtering, getting into the recovery system recovery is about 75%, but its product water reuse to the workshop plating line water.Specific conductivity is at 200us/cm
2Below, in order to guarantee the reuse water quality, generally use the two-pass reverse osmosis system handles, then its product water conductivity can be at 20us/cm
2The dense water of reverse osmosis system is qualified discharge after treatment then.
Claims (1)
1. electroplating waste-water reutilizing process is characterized in that: by each waste water system of plating shop, separately introduce and respectively mix well the pond, reduction or oily water separation are handled, and post precipitation filters through the microfiltration systems pre-treatment, passes through recovery system again, and water of productive use is made in its effluent reuse to workshop; Committee is outer after the settling tank sludge dewatering handles; High-COD waste water is through the Waste Water Treatment qualified discharge; Cyanogen is waste water; After mixing well, get into ion exchange system; Produce water and introduce neutralization tank, the regenerated liquid of ion exchange system is also introduced the acid and the cupric pyrophosphate neutralization of neutralization tank and plating shop batch discharging after sulphur ionization electrolysis generates sodium hydroxide, after delaying basin stops certain hour, be delivered to the recovery wastewater equalization pond then; Oil removing waste water acidification reaction, post precipitation after oily water separation are introduced and are comprehensively mixed well the pond, and committee is outer after the sludge dewatering handles; Chromate waste water is after mixing well, and hexavalent chrome reduction becomes the trivalent chromium introducing comprehensively to mix well the pond; The pond is comprehensively mixed well in acid waste water direct introducing after mixing well; Cupric, nickel, zinc and other waste water are comprehensively mixed well the pond from the direct introducing of plating shop; The waste water adjustment pH value of comprehensively mixing well the pond to neutral after mix soon, mix slowly, post precipitation introduce in the middle of the pond, committee is outer after the sludge dewatering handles; Through the middle pond waste water after the handled of front; After the microfiltration systems pre-filtering is handled; The RO1 recovery machine that gets into first step r-o-in the recovery system through filtered water storage pond is handled; Product water after this RO1 recovery machine is handled gets into recycle-water storage pond; Recycle-water storage pond water outlet gets into accumulator tank through the RO2 water purification machine, and the water of 88%-92% reclaims so that workshop plating line water to be provided in the accumulator tank, and condensed water then gets into and reclaimed by RO3 seaization recovery system after RO1 concentrates tank; Obtain a part through RO3 seaization recovery system and produce in the water cycle entering recycle-water storage pond, and the RO3 of 8%-12% product water is handled qualified discharge through Waste Water Treatment together with the no economic benefit waste water in the electroplating wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610034757A CN101070215B (en) | 2006-04-05 | 2006-04-05 | Electroplating waste-water reutilizing process |
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|---|---|---|---|
| CN200610034757A CN101070215B (en) | 2006-04-05 | 2006-04-05 | Electroplating waste-water reutilizing process |
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| CN101070215A CN101070215A (en) | 2007-11-14 |
| CN101070215B true CN101070215B (en) | 2012-10-24 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844844B (en) * | 2009-03-25 | 2011-11-30 | 中国科学院大连化学物理研究所 | Device for treating high-concentration electroplating wastewater and application thereof |
| CN101613162B (en) * | 2009-07-30 | 2011-09-07 | 上海京瓷电子有限公司 | Treatment method for recycling electroplating wastewater |
| CN101717135B (en) * | 2009-12-04 | 2012-05-30 | 浙江师范大学 | Method for treating nickel-containing electroplating wastewater and recovering nickel by electrolysis |
| CN101717134B (en) * | 2009-12-04 | 2011-05-18 | 浙江师范大学 | Method for treating zinc-containing electroplating wastewater and recovering zinc by electrolysis |
| CN101891315B (en) * | 2010-07-07 | 2012-03-21 | 西安皓海嘉水处理科技有限责任公司 | Process for treating nano-zinc oxide production wastewater |
| CN102897944A (en) * | 2012-07-30 | 2013-01-30 | 北京伊普国际水务有限公司 | System for deeply processing difficultly degradable organic waste water |
| CN102765832B (en) * | 2012-08-01 | 2014-07-02 | 威洁（石狮）中水回用技术有限公司 | System for recycling nickel from electroplating wastewater |
| CN103241803A (en) * | 2013-05-14 | 2013-08-14 | 广东新大禹环境工程有限公司 | Electroplating wastewater separating process |
| CN103833163B (en) * | 2014-03-13 | 2015-04-22 | 江苏中加怡润环境科技有限公司 | Treatment method of electroplating 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 |
| CN106477774B (en) * | 2016-11-18 | 2019-04-26 | 福建省隆辉环保工程有限公司 | A kind of processing method of chemical nickle-plating wastewater |
| CN108726728A (en) * | 2018-06-11 | 2018-11-02 | 柳州市旭平首饰有限公司 | Electroplating sewerage processing system |
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| CN1237543A (en) * | 1999-06-04 | 1999-12-08 | 河北省冶金设计研究院 | Method for treating waste water produced by electroplating process |
| WO2004050949A1 (en) * | 2002-12-05 | 2004-06-17 | Henkel Kommanditgesellschaft Auf Aktien | Method for phosphatizing metal surfaces with improved phosphate recovery |
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| CN101070215A (en) | 2007-11-14 |
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Effective date of registration: 20160908 Address after: The 523000 Guangdong international financial city of Dongguan province IT fifth R & D center of Songshan Lake high tech Industrial Development Zone, block B Patentee after: DONGGUAN DONGYUAN ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: 342600, Jiangxi County, Huichang Province Town Village village Patentee before: Xiao Yingdong |
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Address after: The 523000 Guangdong international financial city of Dongguan province IT fifth R & D center of Songshan Lake high tech Industrial Development Zone, block B Patentee after: Dongguan Dongyuan environmental Polytron Technologies Inc Address before: The 523000 Guangdong international financial city of Dongguan province IT fifth R & D center of Songshan Lake high tech Industrial Development Zone, block B Patentee before: DONGGUAN DONGYUAN ENVIRONMENTAL TECHNOLOGY CO., LTD. |