CN102757147A - Electroplating wastewater comprehensive treatment process - Google Patents
Electroplating wastewater comprehensive treatment process Download PDFInfo
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- CN102757147A CN102757147A CN2012102672080A CN201210267208A CN102757147A CN 102757147 A CN102757147 A CN 102757147A CN 2012102672080 A CN2012102672080 A CN 2012102672080A CN 201210267208 A CN201210267208 A CN 201210267208A CN 102757147 A CN102757147 A CN 102757147A
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Abstract
An electroplating wastewater comprehensive treatment process comprises the following steps: supernatant water obtained from treated chromium-containing wastewater, acid-base wastewater and cyanide-containing wastewater is mixed into a transition water pool, and then the supernatant water is discharged into a municipal sewage pipeline network via a terminal discharge trough after being treated by a quartz filter, an activated carbon adsorber and an ultrafilter; and sludge obtained from the treated chromium-containing wastewater, acid-base wastewater and the cyanide-containing wastewater is treated and stored by a filter press after being concentrated by a thickener. The invention has the following beneficial effects: by utilizing the electroplating wastewater comprehensive treatment process, with the adoption of classified treatment and the additional ultrafiltration system, the water quality of sewage after being treated is ensured to reach the discharge standard.
Description
Technical field
The present invention relates to dirty field of waste water treatment, particularly a kind of treatment process of electroplating wastewater.
Background technology
[0002] electroplating is one of the current whole world three big contaminated industries; Along with the scale of science and technology development electroplating industry also develops; The wastewater flow rate of discharging is increasing; Contain heavy metal ion such as chromium, zinc, copper, cadmium, lead, nickel and acid, alkali, prussiate etc. in the electroplating wastewater and have very big toxic pollutent, what have also belongs to highly toxic substance carcinogenic and the aberration inducing sudden change; In addition, the composite waste of pollutents such as the acid-base material that contains in the waste water is because complicated component also is the difficult point of handling and administering both at home and abroad at present.
Current; Processing for electroplating wastewater is main with chemical method mainly; Main methods is a chemical precipitation method; Cyanide wastewater process broken cyanide, chromate waste water process chromium reduction back through adjusting pH value and dosing coagulant, polymer coagulant aids etc. with metals ion, suspension method and COD place to go, make effluent quality reach emission standard with comprehensive wastewater.The mud that treating processes produces is through after concentrating, dewatering, and the dewatered sludge outward transport is disposed.But there is following defective in the existing plating waste water treatment process: lack the emergency response ability, to accident risk with pollute controllability a little less than; Waste Water Treatment can not centralized monitoring system, can not guarantee the operation of efficient stable; The measure of reactive tank five-way wind, a large amount of irritant gas serious harm operator that produce during waste water reaction are healthy.
Summary of the invention
The present invention is exactly the deficiency to prior art, and a kind of new processing electroplating wastewater comprehensive processing technique of proposition is compared with traditional waste water treatment process, realizes the automatic control and the ctc of wastewater treatment, guarantees waste water processing fully timely and effectively.
A kind of electroplating wastewater comprehensive processing technique; Upper strata clear water after chromate waste water, acidic and alkaline waste water and cyanide wastewater handled respectively is mixed in the excessive pond, utilizes quartz sand filtration device, active carbon adsorber and ultra-fine filter to handle after terminal letdown tank endosperm municipal wastewater pipe network then; The mud that forms behind processing waste water containing chrome, acidic and alkaline waste water and the cyanide wastewater is handled and is stored by pressure filter after thickener concentrates.
Further, described chromate waste water treatment process is: chromate waste water is got into regulating tank, through quantitatively entering in the acidifying groove, regulate pH value 2-3; The pH controller is controlled pH automatically, drops into sodium sulfite anhy 96 then, in reactive tank, reacts; Fully mechanical stirring through reduction reaction, makes Cr
6+All be reduced to Cr
3+Add alkali, flocculation agent and coagulant aids then, fully constant speed stirs, and makes Cr
3+With Cr (OH)
3Form deposition; Process solid-liquid separation in the tube settling groove, Cr (OH)
3Be deposited in the bucket, be disposed to the mud thickener through automatic or semi-automatic regular run by gravity; Supernatant is collected through water collector and is disposed to the transition water tank.
Further, described advance of treatment process of cyanide-bearing effluent is: described advance of treatment process of cyanide-bearing effluent is to realize wastewater treatment through the secondary broken cyanide, and concrete technology is:
The mode of one-level broken cyanide is: after cyanide wastewater is entered equalizing tank, through quantitatively entering the hybrid reaction groove, add basic soln simultaneously in cyanide wastewater, regulate pH value and be alkalescence, in the hybrid reaction groove, add the chlorine bleach liquor;
The mode of secondary broken cyanide is: add acid earlier the pH value is adjusted back to 7-8; Make its fully reaction in the waste water reaction groove through stirring and baffling, the cyanogen in the sewage is thoroughly decomposed through secondary oxidation, the liquid behind the final reaction enters in the cyanogen coagulation tank; Add ferrous sulfate simultaneously and continue flocculation reaction; Afterwards reacted solution is entered in the cyanogen settling bath, its supernatant enters filtering basin, and mud enters thickener.
Further, described acidic and alkaline waste water treatment process is: in containing acidic and alkaline waste water, adding acid or alkaline solution, adjustment waste water pH value drops into coagulating agent then and carries out precipitation process, and the supernatant of post precipitation enters filtering basin, and mud enters thickener.
Beneficial effect of the present invention is: utilize electroplating wastewater comprehensive processing technique of the present invention, through adopting classification processing and increasing ultrafiltration system, can guarantee effectively that the water quality of sewage after processing reaches emission standard.
Embodiment
A kind of electroplating wastewater comprehensive processing technique; Upper strata clear water after chromate waste water, acidic and alkaline waste water and cyanide wastewater handled respectively is mixed in the excessive pond, utilizes quartz sand filtration device, active carbon adsorber and ultra-fine filter to handle after terminal letdown tank endosperm municipal wastewater pipe network then; The mud that forms behind processing waste water containing chrome, acidic and alkaline waste water and the cyanide wastewater is handled and is stored by pressure filter after thickener concentrates.
Further, described chromate waste water treatment process is: chromate waste water is got into regulating tank, through quantitatively entering in the acidifying groove, regulate pH value 2-3; The pH controller is controlled pH automatically, drops into sodium sulfite anhy 96 then, in reactive tank, reacts; Fully mechanical stirring through reduction reaction, makes Cr
6+All be reduced to Cr
3+Add alkali, flocculation agent and coagulant aids then, fully constant speed stirs, and makes Cr
3+With Cr (OH)
3Form deposition; Process solid-liquid separation in the tube settling groove, Cr (OH)
3Be deposited in the bucket, be disposed to the mud thickener through automatic or semi-automatic regular run by gravity; Supernatant is collected through water collector and is disposed to the transition water tank.
Further, described advance of treatment process of cyanide-bearing effluent is: described advance of treatment process of cyanide-bearing effluent is to realize wastewater treatment through the secondary broken cyanide, and concrete technology is:
The mode of one-level broken cyanide is: after cyanide wastewater is entered equalizing tank, through quantitatively entering the hybrid reaction groove, add basic soln simultaneously in cyanide wastewater, regulate pH value and be alkalescence, in the hybrid reaction groove, add the chlorine bleach liquor;
The mode of secondary broken cyanide is: add acid earlier the pH value is adjusted back to 7-8; Make its fully reaction in the waste water reaction groove through stirring and baffling, the cyanogen in the sewage is thoroughly decomposed through secondary oxidation, the liquid behind the final reaction enters in the cyanogen coagulation tank; Add ferrous sulfate simultaneously and continue flocculation reaction; Afterwards reacted solution is entered in the cyanogen settling bath, its supernatant enters filtering basin, and mud enters thickener.
Further, described acidic and alkaline waste water treatment process is: in containing acidic and alkaline waste water, adding acid or alkaline solution, adjustment waste water pH value drops into coagulating agent then and carries out precipitation process, and the supernatant of post precipitation enters filtering basin, and mud enters thickener.
The reaction process of chromate waste water and cyanide wastewater realizes closed-loop control by programmable logic controller, pH meter, ORP appearance and chemicals feed pump.
Claims (5)
1. electroplating wastewater comprehensive processing technique; Upper strata clear water after chromate waste water, acidic and alkaline waste water and cyanide wastewater handled respectively is mixed in the transition pond, utilizes quartz sand filtration device, active carbon adsorber and ultra-fine filter to handle after the terminal letdown tank enters the municipal wastewater pipe network then; The mud that forms behind processing waste water containing chrome, acidic and alkaline waste water and the cyanide wastewater is handled and is stored by pressure filter after thickener concentrates.
2. a kind of electroplating wastewater comprehensive processing technique according to claim 1 is characterized in that described chromate waste water treatment process is: chromate waste water is got into regulating tank; Through quantitatively entering in the acidifying groove, regulate pH value 2-3, the pH controller is controlled pH automatically; Drop into sodium sulfite anhy 96 then, in reactive tank, react, fully mechanical stirring; Through reduction reaction, make Cr
6+All be reduced to Cr
3+Add alkali, flocculation agent and coagulant aids then, fully constant speed stirs, and makes Cr
3+With Cr (OH)
3Form deposition; Process solid-liquid separation in the tube settling groove, Cr (OH)
3Be deposited in the bucket, be disposed to the mud thickener through automatic or semi-automatic regular run by gravity; Supernatant is collected through water collector and is disposed to the transition water tank.
3. a kind of electroplating wastewater comprehensive processing technique according to claim 1 is characterized in that: described advance of treatment process of cyanide-bearing effluent is to realize wastewater treatment through the secondary broken cyanide, and concrete technology is:
The mode of one-level broken cyanide is: after cyanide wastewater is entered equalizing tank, through quantitatively entering the hybrid reaction groove, add basic soln simultaneously in cyanide wastewater, regulate pH value and be alkalescence, in the hybrid reaction groove, add the chlorine bleach liquor;
The mode of secondary broken cyanide is: add acid earlier the pH value is adjusted back to 7-8; Make its fully reaction in the waste water reaction groove through stirring and baffling, the cyanogen in the sewage is thoroughly decomposed through secondary oxidation, the liquid behind the final reaction enters in the cyanogen coagulation tank; Add ferrous sulfate simultaneously and continue flocculation reaction; Afterwards reacted solution is entered in the cyanogen settling bath, its supernatant enters filtering basin, and mud enters thickener.
4. a kind of electroplating wastewater comprehensive processing technique according to claim 1; It is characterized in that: described acidic and alkaline waste water treatment process is: in containing acidic and alkaline waste water, adding acid or alkaline solution; Adjustment waste water pH value; Drop into coagulating agent then and carry out precipitation process, the supernatant of post precipitation enters filtering basin, and mud enters thickener.
5. according to claim 2 and 3 described a kind of electroplating wastewater comprehensive processing techniques, it is characterized in that: the reaction process of chromate waste water and cyanide wastewater realizes closed-loop control by programmable logic controller, pH meter, ORP appearance and chemicals feed pump.
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| CN2012102672080A CN102757147A (en) | 2012-07-31 | 2012-07-31 | Electroplating wastewater comprehensive treatment process |
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| CN2012102672080A CN102757147A (en) | 2012-07-31 | 2012-07-31 | Electroplating wastewater comprehensive treatment process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105000650A (en) * | 2015-08-12 | 2015-10-28 | 沧州金桥环保科技发展有限公司 | Chemical method for using complexing agents to remove hexavalent chromium in wastewater |
| CN105000709A (en) * | 2015-07-09 | 2015-10-28 | 芜湖仅一机械有限公司 | Sewage treatment method |
| CN105948340A (en) * | 2016-05-14 | 2016-09-21 | 合肥中盛水务发展有限公司 | Advanced treatment process for electroplating wastewater |
| CN105948334A (en) * | 2016-07-15 | 2016-09-21 | 湖南鑫力恒环保科技有限公司 | Plug flow type heavy metal wastewater treatment method and complete equipment thereof |
| CN107010758A (en) * | 2017-05-10 | 2017-08-04 | 沈阳环境科学研究院 | A kind of electroplating wastewater total system and method |
| CN107597816A (en) * | 2017-10-31 | 2018-01-19 | 长春黄金研究院 | A kind of gold industry cyanogen Slag treatment method |
| CN108164052A (en) * | 2017-12-29 | 2018-06-15 | 赣州龙源环保产业经营管理有限公司 | A kind of chrome waste liquid intelligent treatment device and processing method |
| CN111051250A (en) * | 2017-09-28 | 2020-04-21 | 哈希公司 | In situ reduction and quenching of hexavalent chromium |
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| CN201809239U (en) * | 2010-10-11 | 2011-04-27 | 张家港市三星净化设备制造有限公司 | Reclaimed water recycling device of industrial waste water |
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2012
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| DE10030984A1 (en) * | 2000-06-30 | 2002-01-10 | Rainer Fuelling | Method and device for cleaning waste water and treating it into drinking water |
| CN101041534A (en) * | 2007-04-27 | 2007-09-26 | 济南晶恒有限责任公司 | Electroplating wastewater treatment reclaiming technique |
| CN101186405A (en) * | 2007-12-04 | 2008-05-28 | 甘晓明 | Closed circulation processing technique for cyanide-containing waste water |
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| CN101456637A (en) * | 2008-11-25 | 2009-06-17 | 天津大学 | Treatment process and method of electroplating wastewater |
| CN101475274A (en) * | 2008-12-31 | 2009-07-08 | 大连力达环境工程有限公司 | Integrative electroplating waste treatment process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105000709A (en) * | 2015-07-09 | 2015-10-28 | 芜湖仅一机械有限公司 | Sewage treatment method |
| CN105000650A (en) * | 2015-08-12 | 2015-10-28 | 沧州金桥环保科技发展有限公司 | Chemical method for using complexing agents to remove hexavalent chromium in wastewater |
| CN105948340A (en) * | 2016-05-14 | 2016-09-21 | 合肥中盛水务发展有限公司 | Advanced treatment process for electroplating wastewater |
| CN105948334A (en) * | 2016-07-15 | 2016-09-21 | 湖南鑫力恒环保科技有限公司 | Plug flow type heavy metal wastewater treatment method and complete equipment thereof |
| CN107010758A (en) * | 2017-05-10 | 2017-08-04 | 沈阳环境科学研究院 | A kind of electroplating wastewater total system and method |
| CN111051250A (en) * | 2017-09-28 | 2020-04-21 | 哈希公司 | In situ reduction and quenching of hexavalent chromium |
| CN107597816A (en) * | 2017-10-31 | 2018-01-19 | 长春黄金研究院 | A kind of gold industry cyanogen Slag treatment method |
| CN108164052A (en) * | 2017-12-29 | 2018-06-15 | 赣州龙源环保产业经营管理有限公司 | A kind of chrome waste liquid intelligent treatment device and processing method |
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Application publication date: 20121031 |