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Nickel-containing electroplating wastewater treatment method

A technology for wastewater treatment and nickel electroplating, which is applied in metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve the problems of high toxicity of heavy metals and complex composition of electroplating wastewater, achieving low price, easy reaction control, Low energy consumption

Inactive Publication Date: 2017-12-19
长沙埃比林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the composition of electroplating wastewater is complex. In addition to cyanide and acid-base wastewater, the heavy metals contained in it are extremely toxic.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Nickel-containing electroplating wastewater is put into a stirring tank, the content of nickel in the electroplating wastewater is 300mg / L, and stirred with an electric mixer, adding precipitant calcium hydroxide in the stirring tank, the concentration of calcium hydroxide is 10mL / L, Then add the sedimentation aid calcium carbonate in the stirring tank, then add the composite water purifying agent in the stirring tank, increase the stirring speed, and continue stirring for 60min; then add the polymer flocculant in the stirring tank, Reduce the stirring speed, and continue to stir for 30 minutes; then pass the waste water into the sedimentation tank for precipitation to obtain sedimentation sludge, press filter the sedimentation sludge, and then dry it at a temperature of 60°C; The precipitated sludge was dissolved in dilute sulfuric acid to obtain a primary solution. The primary solution is extracted, and the extractant is bis(2,4,4-trimethylpentyl)phosphinic acid to ob...

Embodiment 2

[0033] Nickel-containing electroplating wastewater is put into a stirring tank, the content of nickel in the electroplating wastewater is 400mg / L, and stirred with an electric mixer, adding precipitant calcium hydroxide in the stirring tank, the concentration of calcium hydroxide is 13mL / L, Then add the sedimentation aid calcium carbonate in the stirring tank, then add the composite water purifying agent in the stirring tank, increase the stirring speed, and continue stirring for 60min; then add the polymer flocculant in the stirring tank, Reduce the stirring speed and continue to stir for 30 minutes; then pass the waste water into the sedimentation tank for precipitation to obtain sedimentation sludge, press filter the sedimentation sludge, and then dry it at a temperature of 70°C; The precipitated sludge was dissolved in dilute sulfuric acid to obtain a primary solution. The primary solution is extracted, and the extractant is bis(2,4,4-trimethylpentyl)phosphinic acid to obt...

Embodiment 3

[0035] Nickel-containing electroplating wastewater is put into a stirring tank, the content of nickel in the electroplating wastewater is 500mg / L, and stirred with an electric mixer, adding precipitant calcium hydroxide in the stirring tank, the concentration of calcium hydroxide is 15mL / L, Then add the sedimentation aid calcium carbonate in the stirring tank, then add the composite water purifying agent in the stirring tank, increase the stirring speed, and continue stirring for 60min; then add the polymer flocculant in the stirring tank, Reduce the stirring speed, and continue to stir for 30 minutes; then pass the waste water into the sedimentation tank for precipitation to obtain sedimentation sludge, press filter the sedimentation sludge, and then dry it at a temperature of 80°C; The precipitated sludge was dissolved in dilute sulfuric acid to obtain a primary solution. The primary solution is extracted, and the extractant is bis(2,4,4-trimethylpentyl)phosphinic acid to ob...

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PUM

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Abstract

The invention discloses a nickel-containing electroplating wastewater treatment method which comprises the following steps: putting nickel-containing electroplating wastewater into a stirring tank, and stirring with an electric stirring machine; putting a precipitator into the stirring tank; further putting a settling agent into the stirring tank; further putting a composite water purifier into the stirring tank, and increasing a stirring speed for a certain time; further putting a polymeric flocculant into the stirring tank, and reducing the stirring speed for a certain time; introducing obtained wastewater into the settling tank, and performing precipitation so as to obtain precipitated sludge; filtering and drying the precipitated sludge; dissolving the dried sludge into dilute sulfuric acid so as to obtain a primary solution; extracting the primary solution so as to obtain an extract; performing reverse extraction on the extract so as to obtain a reverse extract; electrolyzing the reverse extract, thereby obtaining metal nickel. The method is environmentally friendly in process procedure, low in energy consumption, high in heavy metal recycling rate, low in overall production cost and easy in industrial on-scale production.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for treating nickel-containing electroplating wastewater. Background technique [0002] With the development of the economy and the improvement of people's living standards, the demand for electroplating products is increasing day by day, and electroplating wastewater contains a large amount of heavy metals and other pollutants. If it is not treated and discharged arbitrarily, it will inevitably cause serious harm to the environment and human beings. Therefore, , research on the treatment of electroplating wastewater is a hot issue. [0003] Electroplating is the beautician of metal surfaces. It can obtain various basic, decorative and protective metal coatings on various basic materials. Its products are ubiquitous. For example, with the development of my country's automobile, electrical appliances, construction engineering and other hardware industries and deco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C22B7/00C02F11/12C02F101/20C02F103/16
CPCC02F1/5236C02F1/5245C02F1/56C02F1/62C02F9/00C02F11/12C02F11/122C02F2001/007C02F2101/20C02F2103/16C02F2301/08C22B7/006Y02P10/20
Inventor 不公告发明人
Owner 长沙埃比林环保科技有限公司
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