CN100381370C - System for removing and retrieving hexavalent chrome from wastewater - Google Patents
System for removing and retrieving hexavalent chrome from wastewater Download PDFInfo
- Publication number
- CN100381370C CN100381370C CNB2006100519733A CN200610051973A CN100381370C CN 100381370 C CN100381370 C CN 100381370C CN B2006100519733 A CNB2006100519733 A CN B2006100519733A CN 200610051973 A CN200610051973 A CN 200610051973A CN 100381370 C CN100381370 C CN 100381370C
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- electrodialysis
- inlet
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- dense
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- 239000002351 wastewater Substances 0.000 title claims abstract description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000000909 electrodialysis Methods 0.000 claims abstract description 47
- 238000009296 electrodeionization Methods 0.000 claims description 35
- 238000011084 recovery Methods 0.000 claims description 2
- 239000011651 chromium Substances 0.000 abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052804 chromium Inorganic materials 0.000 abstract description 4
- 238000007747 plating Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000010842 industrial wastewater Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 6
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 6
- 239000013043 chemical agent Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009388 chemical precipitation Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention discloses a system for removing and recovering hexavalent chrome in waste water, and an electric ion removing device comprises an electric ion removing light room inlet, an electric ion removing light room outlet, an electric ion removing concentrated room inlet and an electric ion removing concentrated room outlet. An electrodialysis device comprises an electrodialysis light room inlet, an electrodialysis light room outlet, an electrodialysis concentrated room inlet and an electrodialysis concentrated room outlet. The electric ion removing concentrated room outlet is divided into two paths, one path is connected with the electrodialysis light room inlet through a first valve, and the other path is connected with the electrodialysis concentrated room inlet through a second valve and a flow meter. The electrodialysis light room outlet is connected with an input port of a middle liquid storage tank, and an output port of the middle liquid storage tank is connected with the electric ion removing concentrated room inlet through a pump. When the present invention is used for removing and recovering the Cr(6) in the waste water, the present invention has the advantages of high efficiency and simple and convenient operation and does not need a chemical preparation. The present invention is suitable for the treatment of the chromium plating rinsing waste water and other kinds of water quality similar to the industrial waste water comprising the Cr(6).
Description
Technical field
The present invention relates to Sewage treatment systems, relate in particular to a kind of removal and reclaim sexavalent chrome system in the waste water.
Background technology
Sexavalent chrome (Cr (VI)) often is present in the trade effluents such as electroplating wastewater, tanning waste water.The toxicity of Cr (VI) is very big, and easily accumulation in vivo, so all there is strict demand countries in the world to the discharging that contains Cr (VI) waste water.The main method that present industrial processing contains Cr (VI) waste water has: ion exchange method, reduction-chemical precipitation method, absorption method, electroosmose process and reverse osmosis method etc.The efficient of ion exchange method and absorption method removal Cr (VI) is higher, but regeneration is complicated with reclaimer operation, and needs chemical agent consumption.The equipment of reduction-chemical precipitation method is comparatively easy, but needs chemical agent consumption equally, and the difficult recovery of chromium, easily produces secondary pollution.Reclaim Cr (VI) though electroosmose process and reverse osmosis method can concentrate, it is lower to remove efficient, and the Cr in the water outlet (VI) content is difficult to reach emission standard usually.
Summary of the invention
The object of the present invention is to provide a kind of removal and reclaim sexavalent chrome system in the waste water, make and handle that Cr (VI) content reaches emission standard in the water of back, and Cr (VI) obtains to reclaim with the form of high chromium concentration acid solution.
The technical solution adopted for the present invention to solve the technical problems is: comprise electric deionizer, two valves, electrodialysis unit, under meter, middle liquid-storing box and pump.Electric deionizer has the light chamber inlet of electrodeionization, electrodeionization light chamber outlet, the dense chamber inlet of electrodeionization and electrodeionization dense chamber outlet; Electrodialysis unit has the light chamber inlet of electrodialysis, electrodialysis light chamber outlet, the dense chamber inlet of electrodialysis and electrodialysis dense chamber outlet; Electrodeionization dense chamber outlet is divided into two the tunnel, one the tunnel connects the light chamber inlet of electrodialysis through first valve, another road second valve, under meter connect the dense chamber inlet of electrodialysis, the input aperture of liquid-storing box in the middle of electrodialysis light chamber outlet connects, and the delivery port of middle liquid-storing box connects the dense chamber inlet of electrodeionization through pump.
The beneficial effect that the present invention has is:
Adopt the efficient Cr (VI) that removes in the waste water of electrodeionization (EDI) device, and Cr (VI) is tentatively concentrated in the dense chamber of EDI device, obtain rare chromic acid; Adopt electrodialysis unit that the rare chromic acid of above-mentioned gained is further concentrated, be back to production thereby reach.Adopt the present invention to remove and reclaim Cr (VI) in the waste water, efficient height not only, and also easy and simple to handle, do not need chemical agent again.The present invention is applicable to that chromium plating rinsing waste water and other water quality similarly contain the processing of Cr (VI) trade effluent.
Description of drawings
Accompanying drawing is a structural principle synoptic diagram of the present invention.
Among the figure: 1.EDI device, the light chamber inlet of 2.EDI (waterwater entrance), 3.EDI light chamber outlet (handling the back water out), 4.EDI dense chamber inlet, 5.EDI dense chamber outlet, 6. valve, 7. valve, the 8. light chamber inlet of electrodialysis, 9. electrodialysis light chamber outlet, 10. electrodialysis unit, 11. the dense chamber inlet of electrodialysis, the dense chamber outlets of 12. electrodialysis (dense chromic acid outlet), 13. under meters, 14. middle liquid-storing box, 15. pumps.
Embodiment
As shown in drawings, the present invention includes 1, two valve of electric deionizer 6,7, electrodialysis unit 10, under meter 13, middle liquid-storing box 14 and pump 15.Electric deionizer 1 has the light chamber inlet 2 of electrodeionization, electrodeionization light chamber outlet 3, the dense chamber inlet 4 of electrodeionization and electrodeionization dense chamber outlet 5; Electrodialysis unit 10 has the light chamber inlet 8 of electrodialysis, electrodialysis light chamber outlet 9, the dense chamber inlet 11 of electrodialysis and electrodialysis dense chamber outlet 12; Electrodeionization dense chamber outlet 5 is divided into two the tunnel, one the tunnel connects the light chamber inlet 8 of electrodialysis through first valve 6, another road second valve 7, under meter 13 connect the dense chamber inlet 11 of electrodialysis, the input aperture of liquid-storing box 14 in the middle of electrodialysis light chamber outlet 9 connects, the delivery port of middle liquid-storing box 14 connects the dense chamber inlet 4 of electrodeionization through pump 15.
Shown in accompanying drawing, contain Cr (VI) waste water after the light chamber inlet of EDI (waterwater entrance) 2 enters EDI device 1 through what suspended substance was removed in pre-treatment, Cr (VI) ion at first is adsorbed in the anionite-exchange resin in the light chamber.Under electric field action, Cr (VI) ion carries out electromigration fast in anionite-exchange resin, and the cavity block that sees through the EDI device migrates to dense chamber from light chamber, and waste water is purified the back and discharges from light chamber outlet (handling the back water out) 3, is back to and produces or directly discharging.Because the electromigration speed of Cr (VI) ion in ion exchange resin is very fast, so the efficient of EDI removal Cr (VI) is very high.After the processing, obtain preliminary spissated dilute chromic acid solution and discharge from EDI dense chamber outlet 5, be divided into two-way then, the one tunnel flows to the light chamber inlet 8 of electrodialysis after valve 6 regulation and control; Another road is regulated and control through valve 7, and flows to the dense chamber inlet 11 of electrodialysis after under meter 13 is measured flows.Under electric field action, Cr (VI) migrates to dense chamber from the light chamber of electrodialysis unit, makes Cr (VI) density loss in the light chamber, and the Cr in the dense chamber (VI) concentration obtains to raise.The chromic acid solution that concentrates the back acquisition is discharged from electrodialysis dense chamber outlet 12, is back to production; Rare chromic acid is then discharged from light chamber 9, and liquid-storing box 14 in the middle of flowing into is earlier carried by pump 15 then, flows to the dense chamber inlet 4 of EDI.EDI device 1 of the present invention, electrodialysis unit 10 and under meter 13 etc. all can be commercially available.
Embodiment: Cr (VI) concentration is that the waste water of 50mg/L is after system handles shown in Figure 1, the light chamber outlet of EDI 3Cr (VI) concentration is reduced to below the 0.5mg/L, the dense chamber outlet of EDI 5Cr (VI) concentration rises to 1-2g/L, and the dense chamber outlet 12Cr of electrodialysis (VI) rises to 50-80g/L.
Claims (1)
1. sexavalent chrome system in removal and the recovery waste water is characterized in that: comprise electric deionizer (1), two valves (6,7), electrodialysis unit (10), under meter (13), middle liquid-storing box (14) and pump (15); Electric deionizer (1) has the light chamber inlet of electrodeionization (2), the light chamber outlet of electrodeionization (3), the dense chamber inlet of electrodeionization (4) and the dense chamber outlet of electrodeionization (5); Electrodialysis unit (10) has the light chamber inlet of electrodialysis (8), the light chamber outlet of electrodialysis (9), the dense chamber inlet of electrodialysis (11) and the dense chamber outlet of electrodialysis (12); The dense chamber outlet of electrodeionization (5) is divided into two the tunnel, one the tunnel connects the light chamber inlet of electrodialysis (8) through first valve (6), another road second valve (7), under meter (13) connect the dense chamber inlet of electrodialysis (11), the input aperture of liquid-storing box (14) in the middle of the light chamber outlet of electrodialysis (9) connects, the delivery port of middle liquid-storing box (14) connects the dense chamber inlet of electrodeionization (4) through pump (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100519733A CN100381370C (en) | 2006-06-14 | 2006-06-14 | System for removing and retrieving hexavalent chrome from wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100519733A CN100381370C (en) | 2006-06-14 | 2006-06-14 | System for removing and retrieving hexavalent chrome from wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1872728A CN1872728A (en) | 2006-12-06 |
| CN100381370C true CN100381370C (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100519733A Expired - Fee Related CN100381370C (en) | 2006-06-14 | 2006-06-14 | System for removing and retrieving hexavalent chrome from wastewater |
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| CN (1) | CN100381370C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113023965A (en) * | 2021-03-10 | 2021-06-25 | 天津大学 | High-salt high-COD wastewater zero-discharge treatment device and method |
| CN113213592A (en) * | 2021-05-27 | 2021-08-06 | 深圳市冠融辰环保科技有限公司 | Method for treating chromium electroplating cleaning wastewater |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2325736A1 (en) * | 1975-09-23 | 1977-04-22 | Bonnemay Maurice | Purifying chromium contg. solns. from rinsing baths from pickling - by electrodialysis continuously using specified apparatus |
| CN1172077A (en) * | 1997-08-14 | 1998-02-04 | 王方 | Method for preparing soft water by electro-deionization and its device |
| CN1556045A (en) * | 2004-01-02 | 2004-12-22 | 郑州大学 | Hexa valence chromium in industriel waste water electrolysis treatment method |
| CN2751019Y (en) * | 2004-12-17 | 2006-01-11 | 曹喜平 | Industrial waste water treatment system |
| CN2908473Y (en) * | 2006-06-14 | 2007-06-06 | 浙江大学 | Device for removing and recoverying sexavlence chromium in waste water |
-
2006
- 2006-06-14 CN CNB2006100519733A patent/CN100381370C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2325736A1 (en) * | 1975-09-23 | 1977-04-22 | Bonnemay Maurice | Purifying chromium contg. solns. from rinsing baths from pickling - by electrodialysis continuously using specified apparatus |
| CN1172077A (en) * | 1997-08-14 | 1998-02-04 | 王方 | Method for preparing soft water by electro-deionization and its device |
| CN1556045A (en) * | 2004-01-02 | 2004-12-22 | 郑州大学 | Hexa valence chromium in industriel waste water electrolysis treatment method |
| CN2751019Y (en) * | 2004-12-17 | 2006-01-11 | 曹喜平 | Industrial waste water treatment system |
| CN2908473Y (en) * | 2006-06-14 | 2007-06-06 | 浙江大学 | Device for removing and recoverying sexavlence chromium in waste water |
Non-Patent Citations (2)
| Title |
|---|
| 电去离子技术在电厂水处理中的应用. 廉宏艳等.华北电力技术. 2001 * |
| 谈二级反渗透+EDI水处理系统的原理及其工艺流程. 韩朝晖.大众科技. 2006 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1872728A (en) | 2006-12-06 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Haiyuan Environmental Science & Technology Co., Ltd. Assignor: Zhejiang University Contract record no.: 2010330001899 Denomination of invention: System for removing and retrieving hexavalent chrome from wastewater Granted publication date: 20080416 License type: Exclusive License Open date: 20061206 Record date: 20100919 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20150614 |
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