CN102153220A - Method for treating and recycling polishing waste water of plated part in electroplating industry - Google Patents
Method for treating and recycling polishing waste water of plated part in electroplating industry Download PDFInfo
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- CN102153220A CN102153220A CN2011100414893A CN201110041489A CN102153220A CN 102153220 A CN102153220 A CN 102153220A CN 2011100414893 A CN2011100414893 A CN 2011100414893A CN 201110041489 A CN201110041489 A CN 201110041489A CN 102153220 A CN102153220 A CN 102153220A
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Abstract
The invention relates to a treatment method for waste water in electroplating industry, which is mainly used for treatment and recycle of polishing waste water of plated part during production in electroplating production industry. A combined technology of 'pretreatment' plus 'electrochemical treatment' plus 'coagulating sedimentation' plus 'sand filtration' plus 'activated carbon filtration' is adopted. The method is characterized in that the electrochemical treatment method, the sand filtration and the activated carbon advanced treatment recycle technology are combined. The treatment steps are as follows: (1) the polishing waste water is discharged into an adjusting tank for adjusting water volume and uniformizing water quality, coarsely filtered with a screen, and primarily precipitated to remove floating objects and large-particle substances; (2) effluent from the adjusting tank enters an electrochemical reactor for electrochemical treatment and stays in the electrochemical reactor for less than 30 minutes; (3) effluent from the electrochemical reactor enters a coagulating precipitation tank for coagulating precipitation; (4) effluent from the coagulating precipitation tank enters a sand filtration unit for filtration; and (5) effluent from the sand filtration unit enters an activated carbon filtration unit. After the technical treatment, the effluent is stable in water quality; turbidity, colority, heavy metal and organic matter are effectively removed; and the water quality is superior to the requirement of The reuse of urban recycling water-water quality standard for industrial (GB / T 19923-2005). The method can be used for treating and recycling polishing waste water of plated parts in the electroplating industry, and also can be used for treating and recycling polishing waste water of grinding materials in machining industry. The rear end combining film technology can meet more strict requirements on industrial production water.
Description
Technical field
The invention belongs to the technology for treating industrial waste water field, particularly a kind of electrochemical reactor that adopts is the electroplating industry plating piece waste generated by grinding processing reuse method of main body.
Background technology
Present situations such as the new water consumption of electroplating industry ubiquity is big, wastewater displacement big, the process water reclamation rate is low.In recent years, along with the continuous development of electroplating industry, water consumption increases day by day, and environmental requirement increasingly stringent, discharge of wastewater focus on to the industrial park also needs to pay effluent charge, has increased many costs to enterprise production and management.Reuse has become trend after realizing wastewater treatment, and large, medium and small electroplating enterprise all is suitable for, and is that enterprise's minimizing waste water effluxes, and has improved the necessary ways of ratio of water recycle.The electroplating industry wastewater treatment and renovation helps protecting environment, and the conserve water resource has remarkable economical and social benefit.
Waste generated by grinding results from plating piece pre-treatment workshop section, and cleaning plating piece surface, polishing plating piece make its smooth surface.Medium and small sized enterprises produce 50～60m every day
3Waste generated by grinding.Waste generated by grinding mainly contains the building stones abrasive dust and (is mainly SiO
2), organic monoacid, polymeric surface active agent and heavy metal ion etc., be slightly acidic or weakly alkaline.This type of waste water has the turbidity height, and particle is little, and particle size distribution range is narrow, and stability is high, not characteristics such as free settling.At present, the waste generated by grinding main methods is coagulating sedimentation and other treatment process combination.Coagulation comprises chemical coagulation and electrochemical coagulation as the pretreatment process of advanced treatment or Treatment for Reuse, can remove most of turbidity, organism, heavy metal ion etc.The chemical coagulation treat effluent makes electroconductibility higher because of adding soda acid medicament and coagulating agent, has brought difficulty to reuse.Because of the water quality instability, often there is excessive dosing simultaneously, cost of idleness, sludge output is big.Membrane technique obtains extensive concern as the degree of depth or recycling processing technique, but the membrane technique one-time investment is big, running cost is high, and operative technique requires high.For small, as can't to bear membrane technique alone enterprise, research and develop a kind of simple, economic abrasive waste water treatment process and have important practical usage.
Summary of the invention
The present invention is directed to electroplating industry plating piece waste generated by grinding and handle deficiency or the defective that existing technology exists, propose a kind of plating piece waste generated by grinding and handle reuse technology, be coarse net filtering, just sink, be adjusted to pretreatment unit, electrochemical reactor, coagulating sedimentation are main processing unit, and sand filtration and gac filter are the unitary combination process of reuse.Waste water enters electrochemical reactor after equalizing tank is through simple coarse net interception filtration, sedimentation, water outlet enters coagulative precipitation tank, enters sandfiltration pot, charcoal canister then successively, and water outlet gets final product reuse, enters into the reuse water storage pool.
Know-why of the present invention:
Following process mainly takes place in the electrochemical reactor processing unit.Electro-reduction process; Reductive action in the electrolytic process also can be divided into two classes.One class is direct reduction, and promptly pollutent directly obtains electronics and reductive action takes place on negative electrode, and partial organic substances obtains electronics and is reduced into material with oxidative degradation.Another kind of is indirect reduction, and the positively charged ion in the pollutent at first obtains electronics at negative electrode, make in the ionogen high price or at a low price metallic cation obtain electronics at negative electrode and directly be reduced to positively charged ion or precipitated metal at a low price.Electrochemical coagulation process: after soluble anode passes to direct current, after anode loses electronics, form metallic cation, with the OH in the solution
-Generate metal hydroxides colloid flocculation agent, the micro-interface adsorptive power is extremely strong, and the absorption of pollution substances such as the organism in the waste water, heavy metal ion, co-precipitation are removed.Electrochemistry air supporting process: electrofloatation is that waste water is carried out electrolysis, when voltage reaches the decomposition voltage of water, separates out hydrogen and oxygen respectively on negative electrode and anode, bubble size is very little, the dispersity height adheres to the suspended solids in the water and floats as carrier, and pollution substance is removed.The electric floating hydrophobic contaminant that both can remove in the waste water also can be removed the wetting ability pollutent.If contain Cl in the sewage
-The time, anode has Cl
2Generate, can oxidation of organic compounds and inorganics.
Add flocculation agent anionic polyacrylamide (PAM) in the coagulative precipitation tank, flco becomes big, closely knit easily separated sedimentation, strengthens the removal of organism, colourity, SS, NTU, heavy metal ion, and the water outlet iron level reduces.
Sandfiltration pot filters the suspended substance of further removing in the precipitated outlet water, and delivery turbidity is reduced significantly, and it is transparent that water outlet becomes; Further reduce organic content, the colourity of water outlet, heavy metal is also had good clearance; As the pre-treatment facility of charcoal absorption, can improve subsequent disposal efficient, prolong backwashing time and gac replacement cycle.
Active carbon absorption technology is the significant element that often adopts in water and the wastewater treatment advanced treatment and reclamation, can remove most of organism, colourity, heavy metal ion.
Through above-mentioned combined process, can effectively handle waste generated by grinding, organism, inorganics, SS, heavy metal ion obtain removing, and realize wastewater treatment and renovation.
The technical process that the technical solution used in the present invention is concrete is described as follows:
1. equalizing tank
In order to keep the operation of treatment facility continous-stable, adopt equalizing tank to regulate the waste water quality and the water yield, the equalizing tank front end is established the coarse net interception and is removed by filter floating matter simultaneously, and large particulate matter settles down.
2. electrochemical reactor
The waste water electrochemical reactor of flowing through, bottom water inlet top water outlet, applying voltage is 20～50V, hydraulic detention time is 15～30 minutes.
3. coagulative precipitation tank
The water outlet of electrochemical reaction unit enters coagulative precipitation tank, the leading portion aeration, and making remaining oxidation of divalent is ferric iron, plays stirring action simultaneously, strengthens the mud-water separation effect, the water outlet iron level reduces.Add the flocculation agent PAM of 2mg/L.Hydraulic detention time is 30 minutes, realizes mud-water separation, and bottom mud can be used as the material of construction use after concentrating press filtration.
4. sand filter
Settling tank water outlet pressurization enters sand filter, bottom water inlet top water outlet, by quartz sand and anthraciticly hold back, adsorption, fine particle in can the filtering precipitated outlet water, COD, colourity are to alleviate the load of carbon filter, prolong its life-span, guarantee the replacement cycle of gac half a year to one year.
5. activated carbon filter
The sand filter water outlet enters activated carbon filter, bottom water inlet top water outlet, and gac is 25 minutes with the duration of contact of intaking.
6. reuse water storage pool
The activated carbon filter water outlet enters the reuse of reuse water storage pool.
The present invention has following characteristics:
1. equipment is simple, the technology compactness, and floor space is few;
2. stable, can remove abrasive grains (SS, NTU), COD simultaneously, pollutents such as heavy metal ion;
3. need not add chemical agent substantially in the treating processes, non-secondary pollution produces;
4. the sludge quantity of Chan Shenging is few, free settling, and the water ratio of mud is low, easily dehydration;
5. simple to operate, convenient management can be realized automatization control.
Description of drawings
Accompanying drawing is the process flow sheet that the inventive method is handled electroplating industry plating piece waste generated by grinding.
Embodiment
Embodiment 1
Adopt electrochemistry of the present invention, coagulating sedimentation and sand filtration, gac filter combination process to handle certain Electroplate Factory's plating piece waste generated by grinding.Pending waste generated by grinding enters the electrochemical reaction system and handles, and voltage is 20 volts, and the residence time is 15 minutes, water outlet enters settling tank, the residence time is 30 minutes, enters sand filter in turn then, activated carbon filter filters, and water outlet can be satisfied reuse standard.Concrete water-quality guideline sees Table 1.
The water quality situation of former water of table 1 and processing back water outlet
Embodiment 2
Adopt the abrasive waste water of art breading of the present invention Electroplate Factory.Pending abrasive waste water enters the electrochemical reaction system and handles through behind the screen filtration, and the residence time is 15 minutes, 30 volts of voltages; The electrochemistry water outlet enters coagulative precipitation tank, and the residence time is 30 minutes, and precipitated outlet water enters sand filtration and gac filter unit successively, and water outlet can be satisfied reuse standard.Concrete water-quality guideline sees Table 2.
The water quality situation of former water of table 2 and processing back water outlet
Claims (8)
1. the processing reuse method of an electroplating industry plating piece waste generated by grinding, it is characterized in that: electroplating industry plating piece waste generated by grinding enters equalizing tank, the place establishes the coarse filtration device at the equalizing tank front end, through simple screen filtration, homogeneous, post precipitation, enter electrochemical reactor, the electrochemical reactor water outlet enters coagulative precipitation tank, and the coagulative precipitation tank water outlet is through the sand filtration cell processing, the sand filtration water outlet enters carbon filter unit, and gac filter unit water outlet promptly can reuse.
2. electroplating industry plating piece waste generated by grinding as claimed in claim 1 is handled reuse method, and equalizing tank ingress front end is established the coarse filtration device, the more floating and suspended substance of main removal; Equalizing tank plays the even water yield, water quality effect, guarantees stable, the normal operation of entire treatment system, also macrobead free settling species precipitate can be removed.
3. electroplating industry plating piece waste generated by grinding as claimed in claim 1 is handled reuse method, and in the electrochemical reactor, negative electrode, anode all adopt the iron plate electrode, and the battery lead plate spacing is 2～5 centimetres, and electrode adopts the multipole type method of attachment.
4. electroplating industry plating piece waste generated by grinding as claimed in claim 1 is handled reuse method, and the electrochemical reactor hydraulic detention time was less than 30 minutes; Voltage that electrochemical cell applies is less than 100V.
5. electroplating industry plating piece waste generated by grinding as claimed in claim 1 is handled reuse method, and the electrochemical cell water outlet enters coagulative precipitation tank, and the coagulative precipitation tank front portion is the coagulation district, is provided with dosing and whipping appts; Adding coagulant aids is anion-polyacrylamide (PAM), and the throwing amount is 2mg/L; The coagulative precipitation tank rear portion is divided into the settling region.
6. electroplating industry plating piece waste generated by grinding as claimed in claim 1 is handled reuse method, coagulative precipitation tank water outlet pressurization enters the sand filtration unit, the sand filtration unit is a sandfiltration pot, top water inlet bottom water outlet, filtrate is hard coal and quartz sand, arranges air-water backwashing from top to bottom by the size compacting in the sand filter.
7. electroplating industry plating piece waste generated by grinding as claimed in claim 1 is handled reuse method, and gac filter unit is the gac filter tank, and gac is the powder-type gac, bottom water inlet top water outlet.
8. electroplating industry plating piece waste generated by grinding as claimed in claim 1 is handled reuse method, and water inlet and water outlet all do not need to regulate potential of hydrogen.
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| CN2011100414893A CN102153220A (en) | 2011-02-21 | 2011-02-21 | Method for treating and recycling polishing waste water of plated part in electroplating industry |
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| CN2011100414893A CN102153220A (en) | 2011-02-21 | 2011-02-21 | Method for treating and recycling polishing waste water of plated part in electroplating industry |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329028A (en) * | 2011-09-02 | 2012-01-25 | 中国科学院生态环境研究中心 | Electrochemical treatment method of polluting acid and waste water in gold smeltery |
| CN102515399A (en) * | 2011-12-14 | 2012-06-27 | 杭州回水科技股份有限公司 | Electrochemical treatment method of sewage |
| CN103496809A (en) * | 2013-09-18 | 2014-01-08 | 广西丽桂环保科技有限公司 | Electroplating wastewater electrochemical treatment and recycling comprehensive method |
| CN103864222A (en) * | 2012-12-10 | 2014-06-18 | 上海轻工业研究所有限公司 | Electroplating wastewater COD bioactive carbon treatment apparatus and method thereof |
| CN104944649A (en) * | 2015-07-10 | 2015-09-30 | 常州市龙润机械有限公司 | Chemical waste water treatment method and treatment device |
| CN105731721A (en) * | 2016-01-22 | 2016-07-06 | 南通海陵环境检测有限公司 | Method for treating wastewater generated in mechanical processing |
| CN106045139A (en) * | 2016-06-17 | 2016-10-26 | 红板（江西）有限公司 | Device and process for composite electrochemical reaction pretreatment and recycling of board surface cleaning water in circuit board industry |
| CN108033603A (en) * | 2017-12-22 | 2018-05-15 | 大连英蕴科技有限公司 | A kind of electrochemical process for treating of the sanitary sewage of oceangoing voyage cruise |
| CN108947034A (en) * | 2018-08-02 | 2018-12-07 | 盐城旭恒环保科技有限公司 | A kind of processing unit and processing method of the costing wastwater containing zinc |
| WO2021047048A1 (en) * | 2019-09-11 | 2021-03-18 | 南京延长反应技术研究院有限公司 | System and method for treating industrial sludge by micro-interface enhanced wet oxidation method |
| CN112851006A (en) * | 2020-12-31 | 2021-05-28 | 江西挺进环保科技有限公司 | Treatment method of electroplating wastewater with ultrahigh COD |
| CN113023972A (en) * | 2021-03-12 | 2021-06-25 | 南通寰宇博新化工环保科技有限公司 | High-salt organic wastewater treatment method based on electrochemical coupling hydrogen peroxide |
| CN117509996A (en) * | 2024-01-05 | 2024-02-06 | 山东域潇锆钛矿业股份有限公司 | Wastewater treatment device and wastewater treatment method for perovskite flotation |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329028A (en) * | 2011-09-02 | 2012-01-25 | 中国科学院生态环境研究中心 | Electrochemical treatment method of polluting acid and waste water in gold smeltery |
| CN102515399A (en) * | 2011-12-14 | 2012-06-27 | 杭州回水科技股份有限公司 | Electrochemical treatment method of sewage |
| CN103864222A (en) * | 2012-12-10 | 2014-06-18 | 上海轻工业研究所有限公司 | Electroplating wastewater COD bioactive carbon treatment apparatus and method thereof |
| CN103864222B (en) * | 2012-12-10 | 2016-02-10 | 上海轻工业研究所有限公司 | The biological activated carbon treatment facility of electroplating wastewater COD and method |
| CN103496809A (en) * | 2013-09-18 | 2014-01-08 | 广西丽桂环保科技有限公司 | Electroplating wastewater electrochemical treatment and recycling comprehensive method |
| CN104944649A (en) * | 2015-07-10 | 2015-09-30 | 常州市龙润机械有限公司 | Chemical waste water treatment method and treatment device |
| CN105731721A (en) * | 2016-01-22 | 2016-07-06 | 南通海陵环境检测有限公司 | Method for treating wastewater generated in mechanical processing |
| CN106045139A (en) * | 2016-06-17 | 2016-10-26 | 红板（江西）有限公司 | Device and process for composite electrochemical reaction pretreatment and recycling of board surface cleaning water in circuit board industry |
| CN108033603A (en) * | 2017-12-22 | 2018-05-15 | 大连英蕴科技有限公司 | A kind of electrochemical process for treating of the sanitary sewage of oceangoing voyage cruise |
| CN108947034A (en) * | 2018-08-02 | 2018-12-07 | 盐城旭恒环保科技有限公司 | A kind of processing unit and processing method of the costing wastwater containing zinc |
| WO2021047048A1 (en) * | 2019-09-11 | 2021-03-18 | 南京延长反应技术研究院有限公司 | System and method for treating industrial sludge by micro-interface enhanced wet oxidation method |
| CN112851006A (en) * | 2020-12-31 | 2021-05-28 | 江西挺进环保科技有限公司 | Treatment method of electroplating wastewater with ultrahigh COD |
| CN113023972A (en) * | 2021-03-12 | 2021-06-25 | 南通寰宇博新化工环保科技有限公司 | High-salt organic wastewater treatment method based on electrochemical coupling hydrogen peroxide |
| CN117509996A (en) * | 2024-01-05 | 2024-02-06 | 山东域潇锆钛矿业股份有限公司 | Wastewater treatment device and wastewater treatment method for perovskite flotation |
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Application publication date: 20110817 |