CN101549920A - Method for recovering nickel salts in nickel-electroplating waste water - Google Patents
Method for recovering nickel salts in nickel-electroplating waste water Download PDFInfo
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- CN101549920A CN101549920A CNA2008100602299A CN200810060229A CN101549920A CN 101549920 A CN101549920 A CN 101549920A CN A2008100602299 A CNA2008100602299 A CN A2008100602299A CN 200810060229 A CN200810060229 A CN 200810060229A CN 101549920 A CN101549920 A CN 101549920A
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Abstract
The invention belongs to the technical field of industrial waste water treatment, in particular to a method for recovering nickel salts in nickel-electroplating waste water. Aiming at the defects of larger investment and high operation cost of the prior nickel-electroplating waste water treatment, the invention provides the method for recovering the nickel salts in the nickel-electroplating waste water, which has low investment, simple operation and low cost, and ensures that recovered nickel salts can be directly reused for a nickel-electroplating tank. The method comprises the following steps: (1) alkali is added to the nickel-electroplating waste water; (2) the nickel-electroplating waste water treated by the alkali flows into a precipitator for precipitation; through the precipitation, the nickel-electroplating waste water containing the precipitate which is nickel salts is inputted into a press filter for nickel salt press filtering; the obtained precipitate nickel salts are washed with clear water for a plurality of times so that the obtain pure nickel salts which can be directly reused for the electroplating nickel tank is obtained; and (3) supernatant fluid flows into a neutralization pond for neutralization.
Description
Technical field
The invention belongs to the technical field of Industrial Wastewater Treatment, nickel salt recovery method in particularly a kind of electronickelling waste water.
Background technology
Existing treatment process to Treating Electroplate Wastewater Containing Nickel has reverse osmosis membrane and ion exchange method, wherein:
(1) reclaim nickel salt with reverse osmosis membrane, can concentrate in the solution containing nickel 10～20 times of nickel concentrations, waste water becomes deionized water, can be back to dosing, cleaning.But this method makes and contains nickel concentration and still do not reach 1g/l, because of concentration is low excessively, so can not be back to the electronickelling groove; And with the reverse osmosis membrane processing cost up to more than 8 yuan/ton, one-time investment is also big, loses more than gain so handle nickel-containing waste water with reverse osmosis membrane, also can't promote.
(2) reclaim nickel salt with ion exchange method, resin absorption behind the nickel, wash with metabisulfite solution, or wash with sulphuric acid soln.But the former contains the sodium amount in the elutriant big, and latter's wash-out difficulty will all make elutriant be difficult to direct reuse in the nickel coating bath with the acid of volume, can only make the single nickel salt product with elutriant; In addition, ion exchange method is once invested bigger, and process cost is higher, and resin regeneration produces some spent acid again and waste lye causes secondary pollution.
At present, most Electroplate Factories directly enter the integrative electroplating waste pond with nickel-containing waste water, handle as comprehensive wastewater.Like this, nickel enters electroplating sludge, and electroplating sludge is handled and is not good at being easy to produce secondary pollution, and, because nickel precipitates completely that PH is 9.5, regulate waste water PH usually and be 10～11 and come coprecipitated nickel hydroxide, at this moment cause the dissolving of two property metal trivalent chromiums and zinc again, cause the wastewater treatment difficulty up to standard.
Summary of the invention
The present invention is directed to existing is nickel-containing waste water directly to be entered the integrative electroplating waste pond handle to most Electroplate Factories in the electronickelling wastewater treatment, electroplating sludge is handled and is easily produced secondary pollution, in addition, reclaim nickel salt processing cost height with reverse osmosis membrane, one-time investment is also big, reclaiming nickel salt with ion exchange method once invests bigger, the weak point that process cost is high, provide that a kind of one-time investment is little, simple to operate, cost is low, but the nickel salt direct reuse of recovery nickel salt recovery method in a kind of electronickelling waste water of nickel plating plating tank.
The technical solution used in the present invention is finished in the following way: nickel salt recovery method in a kind of electronickelling waste water, and it may further comprise the steps:
(1) in electronickelling waste water, adds alkali under the stirring, make electronickelling wastewater oxidation reduction potential reach 1000～1100;
(2) the electronickelling waste water after adding alkaline purification flows into the settling vessel precipitation, through precipitation, contain in the electronickelling waste water input pressure filter of throw out nickel salt and carry out the nickel salt press filtration, resulting throw out nickel salt repeatedly washs with clear water, obtain purified nickel salt, get final product direct reuse in the electronickelling groove;
(3) supernatant liquor flows into the neutralization tank neutralization.
In above-mentioned electronickelling waste water in the nickel salt recovery method, the instrument that is used for detecting the redox potential in the electronickelling waste water is to adopt oxidation-reduction potentiometer, and this oxidation-reduction potentiometer can be used to indicate current potential and the dosing dosage in the waste water.
In the nickel salt recovery method, settling vessel adopts tilted plate separator in above-mentioned electronickelling waste water.
In the nickel salt recovery method, pressure filter adopts the accurate pressure filter of micropore in above-mentioned electronickelling waste water.
The nickel salt recovery method is compared with existing treatment process to Treating Electroplate Wastewater Containing Nickel in a kind of electronickelling waste water of the present invention, and have following characteristics: equipment is simple, and floor space is little, reduced investment; Simple to operate, easy to control, can reclaim nickel salt continuously; Cost recovery is low, but the nickel salt direct reuse of recovery also can be processed into the single nickel salt product in the electronickelling groove; Reduced the electroplating wastewater processing cost, and made electroplating wastewater processing easier to be up to standard.
Description of drawings
Fig. 1 is the process flow sheet of nickel salt recovery method in a kind of electronickelling waste water of the present invention.
Embodiment
Contrast accompanying drawing below, the invention will be further described by embodiment.
With reference to accompanying drawing 1, nickel salt recovery method in a kind of electronickelling waste water, it may further comprise the steps:
(1) electronickelling waste water adds alkali by in liquid-inlet pipe 1 injecting reactor 4 under stirring in electronickelling waste water, makes the wastewater oxidation reduction potential reach 1000～1100;
(2) the electronickelling waste water after adding alkaline purification flows into settling vessel 5 precipitations by the opening of reactor 4 middle and lower parts, through precipitation, the electronickelling waste water that contains the throw out nickel salt is by carrying out the nickel salt press filtration in the pipeline 7 input pressure filters 8, resulting throw out nickel salt repeatedly washs with clear water, and the nickel salt that obtains can come out the back direct reuse in the electronickelling groove by discharge nozzle 11;
(3) supernatant liquor in the settling vessel 5 neutralizes by drain pipe 6 inflow neutralization tanks.
After testing, the supernatant liquor nickel content in the settling vessel 5 is＜0.5mg/l.
In above-mentioned electronickelling waste water, in the nickel salt recovery method, in reactor 4, be provided with the oxidation-reduction potentiometer 2 and the agitator 3 that are used for detecting the redox potential in the electronickelling waste water.
In the nickel salt recovery method, settling vessel 5 adopts tilted plate separator in above-mentioned electronickelling waste water.
In the nickel salt recovery method, pressure filter 8 adopts the accurate pressure filter of micropore, is provided with the water inlet pipe 9 and the water pump 10 that are used for carrying clear water on pressure filter 8 in above-mentioned electronickelling waste water.
Claims (4)
1, nickel salt recovery method in a kind of electronickelling waste water is characterized in that nickel salt recovery method in this electronickelling waste water, may further comprise the steps:
(1) in electronickelling waste water, adds alkali under the stirring, make electronickelling wastewater oxidation reduction potential reach 1000～1100;
(2) the electronickelling waste water after adding alkaline purification flows into the settling vessel precipitation;
(3) through precipitation, contain in the electronickelling waste water input pressure filter of throw out nickel salt and carry out the nickel salt press filtration, resulting throw out nickel salt repeatedly washs with clear water, obtains purified nickel salt, can direct reuse in the electronickelling groove;
(4) supernatant liquor flows into the neutralization tank neutralization.
2, nickel salt recovery method in the electronickelling waste water according to claim 1, the instrument that it is characterized in that being used for detecting the redox potential in the electronickelling waste water is to adopt oxidation-reduction potentiometer.
3, nickel salt recovery method in the electronickelling waste water according to claim 1 and 2 is characterized in that settling vessel adopts tilted plate separator.
4, nickel salt recovery method in the electronickelling waste water according to claim 1 and 2 is characterized in that pressure filter adopts the accurate pressure filter of micropore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100602299A CN101549920A (en) | 2008-03-31 | 2008-03-31 | Method for recovering nickel salts in nickel-electroplating waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100602299A CN101549920A (en) | 2008-03-31 | 2008-03-31 | Method for recovering nickel salts in nickel-electroplating waste water |
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| Publication Number | Publication Date |
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| CN101549920A true CN101549920A (en) | 2009-10-07 |
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| CNA2008100602299A Pending CN101549920A (en) | 2008-03-31 | 2008-03-31 | Method for recovering nickel salts in nickel-electroplating waste water |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452743A (en) * | 2010-10-25 | 2012-05-16 | 上海丰信环保科技有限公司 | Method for treating complex-containing nickel plating wastewater |
| CN103011451A (en) * | 2012-11-27 | 2013-04-03 | 常州大学 | High-efficiency treatment process for nickel-containing wastewater |
| CN103962574A (en) * | 2014-04-30 | 2014-08-06 | 江苏科技大学 | Method for preparing porous nickel particles through nickel ions in hydrothermal hydrogen gas reduction waste water |
| CN105954265A (en) * | 2016-07-12 | 2016-09-21 | 湖南永清环保研究院有限责任公司 | Determining method for trace nickel in high-salinity wastewater |
| CN109225997A (en) * | 2018-07-26 | 2019-01-18 | 荆门市格林美新材料有限公司 | A kind of positive electrode water washing device |
| CN109607883A (en) * | 2019-02-13 | 2019-04-12 | 中国葛洲坝集团易普力股份有限公司 | The processing method and its system of nickel hydrazine nitrate priming waste water |
| CN111499080A (en) * | 2020-06-15 | 2020-08-07 | 徐州泰斗金属科技有限公司 | Chemical nickel plating wastewater treatment process and device |
-
2008
- 2008-03-31 CN CNA2008100602299A patent/CN101549920A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452743A (en) * | 2010-10-25 | 2012-05-16 | 上海丰信环保科技有限公司 | Method for treating complex-containing nickel plating wastewater |
| CN103011451A (en) * | 2012-11-27 | 2013-04-03 | 常州大学 | High-efficiency treatment process for nickel-containing wastewater |
| CN103962574A (en) * | 2014-04-30 | 2014-08-06 | 江苏科技大学 | Method for preparing porous nickel particles through nickel ions in hydrothermal hydrogen gas reduction waste water |
| CN103962574B (en) * | 2014-04-30 | 2016-04-13 | 江苏科技大学 | In hydro-thermal hydrogen reducing waste water, nickel ion prepares the method for nickel porous particulate |
| CN105954265A (en) * | 2016-07-12 | 2016-09-21 | 湖南永清环保研究院有限责任公司 | Determining method for trace nickel in high-salinity wastewater |
| CN109225997A (en) * | 2018-07-26 | 2019-01-18 | 荆门市格林美新材料有限公司 | A kind of positive electrode water washing device |
| CN109607883A (en) * | 2019-02-13 | 2019-04-12 | 中国葛洲坝集团易普力股份有限公司 | The processing method and its system of nickel hydrazine nitrate priming waste water |
| CN111499080A (en) * | 2020-06-15 | 2020-08-07 | 徐州泰斗金属科技有限公司 | Chemical nickel plating wastewater treatment process and device |
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Application publication date: 20091007 |