CN102311183A - Cyanide-containing wastewater treatment method and system - Google Patents
Cyanide-containing wastewater treatment method and system Download PDFInfo
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- CN102311183A CN102311183A CN2010102200748A CN201010220074A CN102311183A CN 102311183 A CN102311183 A CN 102311183A CN 2010102200748 A CN2010102200748 A CN 2010102200748A CN 201010220074 A CN201010220074 A CN 201010220074A CN 102311183 A CN102311183 A CN 102311183A
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- cyanide
- cyanogen
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- tank
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Abstract
The invention discloses a cyanide-containing wastewater treatment method, which comprises the following steps of: regulating the pH value of cyanide-containing wastewater to be 1.8-2.2, and introducing gas for stirring; allowing the generated trace cyanide gas to enter a cyanogen absorption tower, treating and discharging; making partial cyanide in the wastewater precipitated in a precipitate form from the wastewater, adding a flocculating agent to make the cyanide precipitate form a larger alumen ustum precipitate, allowing the precipitated sludge to enter a sludge filter pressing system, and pressing the sludge into a filter cake; and filtering the cyanide-containing wastewater subjected to filter pressing by using a filter, and breaking cyanogen by using a cyanogen breaking reaction tank. The invention also discloses a cyanide-containing wastewater treatment system for implementing the method. By the invention, 60 percent of sodium hypochlorite or calcium hypochlorite can be saved, and the wastewater treatment operating cost of enterprises is reduced. Meanwhile, copper sludge can be recycled to create benefit for the enterprises.
Description
Technical field
The invention belongs to technical field of waste water processing, relate in particular to a kind of cyanide wastewater treatment process and treatment system.
Background technology
Cyanide wastewater is mainly derived from plating, industries such as wet gold extraction.Because the hypertoxicity of prussiate, cyanide wastewater must pass through processing, reach discharging standards after, just can be discharged in the environment.At present treatment Methods of Cyanide Wastewater is mainly adopted alkaline chlorination process two-stage broken cyanide method, cyanide wastewater is added lime to the one-level broken cyanide or alkali is regulated more than the pH value to 10.5, adds Youxiaolin or Losantin; The secondary broken cyanide adds acid with cyanide wastewater to be regulated about pH value to 8, adds Youxiaolin or Losantin; The method of this simple employing alkaline chlorination process two-stage broken cyanide, the amount ratio of Youxiaolin or Losantin is bigger, particularly contains the higher waste water of cyanogen concentration, and the cyanide wastewater treatment operating costs is high.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, provide a kind of running cost low cyanide wastewater treatment process.
Another object of the present invention provides a kind of treatment of cyanide waste water system.
Technical scheme of the present invention is such: a kind of cyanide wastewater treatment process comprises the steps:
(1) gas stirring is handled: cyanide wastewater is regulated pH value to 1.8～2.2, feed gas stirring and handle;
(2) the gas cyaniding thing is handled: handle the micro cyanide gas that produces through gas stirring and get into the dicyanogen absorption tower, handle the back discharging;
Chemical equation: NaCN+H
+=HCN ↑+Na
+
(3) the deposition prussiate is handled: handle that through gas stirring the part prussiate in the waste water is precipitated out from waste water with precipitation forms; Add flocculation agent again; The prussiate deposition is precipitated out with bigger alumen ustum, and precipitating sludge gets into the sludge press filtration system, is pressed into filter cake;
The main chemical reactions equation is following:
Zn(CN)
4 2-+4H
+＝4HCN+Zn
2+
Cu (CN)
4 2-+ 2H
+=2HCN+CuCN ↓ (greyish white)
CuCN+SCN
-+ H
+=HCN+CuSCN ↓ (greyish white)
4Cu (CN)
4 2-+ 13H
++ Fe (CN)
6 4-=12HCN+Cu
4Fe (CN)
6↓ (pale red)
Fe (CN)
6 4-+ CuFe (CN)
6+ O
2+ 8H
+=2Cu
2Fe (CN)
6(reddish brown) ↓+4H
2O
4Ag (CN)
2 -+ Fe (CN)
6 4-+ 8H
+=8HCN+Ag
4Fe (CN)
6↓ (greyish white)
Ag (CN)
2 -+ SCN
-+ 2H
+=2HCN+AgSCN ↓ (greyish white)
(4) filter: the cyanide wastewater of handling through press filtration filters through more medium filter and bag filter successively;
(5) broken cyanide pond broken cyanide: through the filtering cyanide wastewater of strainer, add lime or alkali in the broken cyanide reaction tank and regulate pH value to 10.5～11.5, add Youxiaolin or Losantin again, the waste water of broken good cyanogen gets into the comprehensive wastewater pond.
A kind of treatment of cyanide waste water of the present invention system is characterized in that: comprise the cyanogen wastewater collection pond that is communicated with successively through pipeline, remove cyanogen tower, intermediate water tank, settling tank, collection water tank, more medium filter, bag filter, broken cyanide reaction tank; Cyanogen wastewater collection pond is provided with one and adds sour case; Cyanogen wastewater collection pond and remove pipeline between the cyanogen tower and be provided with pump and one and add sour case; Remove the bottom of cyanogen tower and give gas through air feed pump, the top of removing the cyanogen tower is communicated with a dicyanogen absorption tower through pipeline; Pump is arranged on the pipeline between intermediate water tank and the settling tank No. two, the flocculation agent dosing tank is set on settling tank, connect a copper sludge sump in the bottom of settling tank again, the copper sludge sump is communicated with pressure filter; On the pipeline of collecting between water tank and the more medium filter, pump is arranged No. three; PH value regulator solution case and and Youxiaolin or Losantin case are arranged on the broken cyanide reaction tank.
The present invention compared with prior art has following advantage: 1, can save 60% Youxiaolin or Losantin, for enterprise reduces wastewater treatment running cost.2, do not waste resource, this technology can be transformed on original basis, and the old equipment of original old technology utilizes as far as possible and all utilizes again, for enterprise reduces investment.3, through copper sludge is reclaimed, can be enterprise's create beneficial result.4, only adopt new technology and to carry out broken cyanide to a few part prussiate and handle, reduce the pressure of cyanogen breaking process, also alleviate the processing pressure of subsequent processing device simultaneously.
Description of drawings
Fig. 1 is a cyanide wastewater treatment system synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Method embodiment: a kind of cyanide wastewater treatment process comprises the steps:
A kind of cyanide wastewater treatment process comprises the steps:
(1) gas stirring is handled: cyanide wastewater is regulated pH value to 1.8～2.2, feed gas stirring and handle;
(2) the gas cyaniding thing is handled: handle the micro cyanide gas that produces through gas stirring and get into the dicyanogen absorption tower, handle the back discharging;
(3) the deposition prussiate is handled: handle that through gas stirring the part prussiate in the waste water is precipitated out from waste water with precipitation forms; Add flocculation agent again; The prussiate deposition is precipitated out with bigger alumen ustum, and precipitating sludge gets into the sludge press filtration system, is pressed into filter cake;
(4) filter: the cyanide wastewater of handling through press filtration filters through more medium filter and bag filter successively;
(5) broken cyanide pond broken cyanide: through the filtering cyanide wastewater of strainer, add lime or alkali in the broken cyanide reaction tank and regulate pH value to 10.5～11.5, add Youxiaolin or Losantin again, the waste water of broken good cyanogen gets into the comprehensive wastewater pond.
System device embodiment: as shown in Figure 1; A kind of treatment of cyanide waste water system comprises the cyanogen wastewater collection pond 1 that is communicated with successively through pipeline, removes cyanogen tower 6, intermediate water tank 8, settling tank 10, collects water tank 12, more medium filter 14, bag filter 15, broken cyanide reaction tank 16; Cyanogen wastewater collection pond 1 is provided with one and adds sour case 2; Cyanogen wastewater collection pond 1 and remove pipeline between the cyanogen tower 6 and be provided with pump 4 and one and add sour case 3; Remove the bottom of cyanogen tower 6 and give gas through air feed pump 5, the top of removing cyanogen tower 6 is communicated with a dicyanogen absorption tower 7 through pipeline; Pump 9 is arranged No. two on the pipeline between intermediate water tank 8 and the settling tank 10, flocculation agent dosing tank 11 is set on settling tank 10, connect a copper sludge sump 19 in the bottom at settling tank 10, the copper sludge sump is communicated with pressure filter 20; On the pipeline of collecting between water tank 12 and the more medium filter 14, pump 13 is arranged No. three; PH value regulator solution case 17 and and Youxiaolin or Losantin case 18 are arranged on broken cyanide reaction tank 16.
Claims (2)
1. a cyanide wastewater treatment process comprises the steps:
(1) gas stirring is handled: cyanide wastewater is regulated pH value to 1.8～2.2, feed gas stirring and handle;
(2) the gas cyaniding thing is handled: handle the micro cyanide gas that produces through gas stirring and get into the dicyanogen absorption tower, handle the back discharging;
(3) the deposition prussiate is handled: handle that through gas stirring the part prussiate in the waste water is precipitated out from waste water with precipitation forms; Add flocculation agent again; The prussiate deposition is precipitated out with bigger alumen ustum, and precipitating sludge gets into the sludge press filtration system, is pressed into filter cake;
(4) filter: the cyanide wastewater of handling through press filtration filters through more medium filter and bag filter successively;
(5) broken cyanide pond broken cyanide: through the filtering cyanide wastewater of strainer, add lime or alkali in the broken cyanide reaction tank and regulate pH value to 10.5～11.5, add Youxiaolin or Losantin again, the waste water of broken good cyanogen gets into the comprehensive wastewater pond.
2. implement a kind of treatment of cyanide waste water system of the said cyanide wastewater treatment process of claim 1, it is characterized in that: comprise the cyanogen wastewater collection pond (1) that is communicated with successively through pipeline, remove cyanogen tower (6), intermediate water tank (8), settling tank (10), collect water tank (12), more medium filter (14), bag filter (15), broken cyanide reaction tank (16); Cyanogen wastewater collection pond (1) is provided with one and adds sour case (2); Cyanogen wastewater collection pond (1) and remove pipeline between the cyanogen tower (6) and be provided with a pump (4) and one and add sour case (3); Remove the bottom of cyanogen tower (6) and give gas through air feed pump (5), the top of removing cyanogen tower (6) is communicated with a dicyanogen absorption tower (7) through pipeline; On the pipeline between intermediate water tank (8) and the settling tank (10), No. two pumps (9) are arranged, flocculation agent dosing tank (11) is set on settling tank (10), connect a copper sludge sump (19) in the bottom at settling tank (10), the copper sludge sump is communicated with pressure filter (20); On the pipeline of collecting between water tank (12) and the more medium filter (14), No. three pumps (13) are arranged; PH value regulator solution case (17) and and Youxiaolin or Losantin case (18) are arranged on broken cyanide reaction tank (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102200748A CN102311183A (en) | 2010-07-06 | 2010-07-06 | Cyanide-containing wastewater treatment method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102200748A CN102311183A (en) | 2010-07-06 | 2010-07-06 | Cyanide-containing wastewater treatment method and system |
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|---|---|
| CN102311183A true CN102311183A (en) | 2012-01-11 |
Family
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058427A (en) * | 2013-01-25 | 2013-04-24 | 甘肃银光聚银化工有限公司 | Treatment method of brine waste in production process of toluene-2,4-diisocyanate (TDI) |
| CN104070052A (en) * | 2014-06-27 | 2014-10-01 | 江苏理工学院 | Treatment method of cyanogen-containing waste residue |
| CN105174555A (en) * | 2015-10-13 | 2015-12-23 | 安徽省绿巨人环境技术有限公司 | Cyanogens-containing sewage treatment method and device |
| CN105198120A (en) * | 2015-10-15 | 2015-12-30 | 桂林市春晓环保科技有限公司 | Method for removing cyanide in tailing wastewater |
| CN108217899A (en) * | 2018-01-31 | 2018-06-29 | 冯斌斌 | A kind of novel electron pollution emission reduction device |
| CN108217896A (en) * | 2018-01-24 | 2018-06-29 | 东莞市升佳净水材料有限公司 | A kind of polymerization alkali and preparation method thereof |
| CN108314161A (en) * | 2018-01-31 | 2018-07-24 | 冯斌斌 | A kind of electronic pollution emission reduction device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172743A (en) * | 2007-11-02 | 2008-05-07 | 海南晟泰环境工程有限公司 | Combination technique for processing and recycling high-cyanogen high-ammonia high-salt organic waste water |
-
2010
- 2010-07-06 CN CN2010102200748A patent/CN102311183A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172743A (en) * | 2007-11-02 | 2008-05-07 | 海南晟泰环境工程有限公司 | Combination technique for processing and recycling high-cyanogen high-ammonia high-salt organic waste water |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058427A (en) * | 2013-01-25 | 2013-04-24 | 甘肃银光聚银化工有限公司 | Treatment method of brine waste in production process of toluene-2,4-diisocyanate (TDI) |
| CN106734072B (en) * | 2014-06-27 | 2019-04-23 | 江苏理工学院 | A kind of processing method of the waste residue containing cyanogen |
| CN104070052A (en) * | 2014-06-27 | 2014-10-01 | 江苏理工学院 | Treatment method of cyanogen-containing waste residue |
| CN104070052B (en) * | 2014-06-27 | 2017-02-15 | 江苏理工学院 | Treatment method of cyanogen-containing waste residue |
| CN106734072A (en) * | 2014-06-27 | 2017-05-31 | 江苏理工学院 | A kind of processing method containing cyanogen waste residue |
| CN106734071A (en) * | 2014-06-27 | 2017-05-31 | 江苏理工学院 | The method containing cyanogen waste residue is processed with bleaching powder |
| CN106734071B (en) * | 2014-06-27 | 2019-05-28 | 江苏理工学院 | With the method for bleaching powder processing waste residue containing cyanogen |
| CN105174555A (en) * | 2015-10-13 | 2015-12-23 | 安徽省绿巨人环境技术有限公司 | Cyanogens-containing sewage treatment method and device |
| CN105198120A (en) * | 2015-10-15 | 2015-12-30 | 桂林市春晓环保科技有限公司 | Method for removing cyanide in tailing wastewater |
| CN108217896A (en) * | 2018-01-24 | 2018-06-29 | 东莞市升佳净水材料有限公司 | A kind of polymerization alkali and preparation method thereof |
| CN108314161A (en) * | 2018-01-31 | 2018-07-24 | 冯斌斌 | A kind of electronic pollution emission reduction device |
| CN108314161B (en) * | 2018-01-31 | 2019-01-15 | 江苏和鼎电子科技有限公司 | A kind of electronic pollution emission reduction device |
| CN108217899A (en) * | 2018-01-31 | 2018-06-29 | 冯斌斌 | A kind of novel electron pollution emission reduction device |
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Application publication date: 20120111 |