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Precipitating treatment method of nickel-containing electroplating waste water

A technology of precipitation treatment and nickel electroplating, applied in metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of high toxicity of heavy metals and complex composition of electroplating wastewater, achieving low price, easy reaction control, The effect of easy reaction conditions

Inactive Publication Date: 2017-12-01
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

[0029] Put nickel-containing electroplating wastewater into a stirring tank, the content of nickel in the electroplating wastewater is 300mg / L, stir with an electric mixer, and add dilute sulfuric acid to adjust the pH of the wastewater to 1, add iron salt ferrous sulfate to the stirring tank , the concentration of ferrous sulfate is 3mL / L, then add potassium hydroxide to adjust the pH=8 of the waste water, heat the waste water in the stirring tank, the heating temperature is 80°C, and stir for 30min, then pass the waste water into Precipitate in the sedimentation tank, and settle in the sedimentation tank for 1 hour to obtain sedimentation sludge; filter the sedimentation sludge by pressure filter, and then dry it at 60°C; dissolve the dried product in In the dilute sulfuric acid, a primary solution is obtained; the primary solution is extracted, and the extractant is bis(2,4,4-trimethylpentyl)phosphinic acid to obtain an extract; the extract is reacted extraction, the stripp...

Embodiment 2

[0031] Put nickel-containing electroplating wastewater into a stirring tank, the content of nickel in the electroplating wastewater is 350mg / L, stir with an electric mixer, and add dilute sulfuric acid to adjust the pH of the wastewater to 1.2, add iron salt ferrous sulfate to the stirring tank , the concentration of ferrous sulfate is 5mL / L, then add potassium hydroxide to adjust the pH=8.3 of waste water, heat the waste water in the stirring tank, the heating temperature is 85°C, and stir for 30min, then pass the waste water into Precipitate in the sedimentation tank, and settle in the sedimentation tank for 1.5 hours to obtain sedimentation sludge; filter the sedimentation sludge by pressure filter, and then dry it at a temperature of 70°C; dissolve the dried product in In the dilute sulfuric acid, a primary solution is obtained; the primary solution is extracted, and the extractant is bis(2,4,4-trimethylpentyl)phosphinic acid to obtain an extract; the extract is reacted ex...

Embodiment 3

[0033] Put nickel-containing electroplating wastewater into a stirring tank, the content of nickel in the electroplating wastewater is 400mg / L, stir with an electric mixer, and add dilute sulfuric acid to adjust the pH of the wastewater to 1.5, add iron salt ferrous sulfate to the stirring tank , the concentration of ferrous sulfate is 7mL / L, then add potassium hydroxide to adjust the pH=8.5 of the waste water, heat the waste water in the stirring tank, the heating temperature is 90°C, and stir for 30min, then pass the waste water into Precipitate in the sedimentation tank, and settle in the sedimentation tank for 2 hours to obtain sedimentation sludge; filter the sedimentation sludge by filter press, and then dry it at 80°C; dissolve the dried product in In the dilute sulfuric acid, a primary solution is obtained; the primary solution is extracted, and the extractant is bis(2,4,4-trimethylpentyl)phosphinic acid to obtain an extract; the extract is reacted extraction, the stri...

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PUM

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Abstract

The invention discloses a precipitating treatment method of nickel-containing electroplating waste water. The precipitating treatment method comprises the following steps: putting the nickel-containing electroplating waste water into a stirring pool, stirring by using an electric stirring machine, and adjusting pH value of the waste water; adding ferric salt into the stirring pool, then adjusting pH value of the waste water; heating the waste water in the stirring pool, and stirring for a period of time; then introducing the waste water into a precipitating pool for precipitation to obtain precipitated sludge; filtering and drying the precipitated sludge; dissolving dried products in dilute sulfuric acid to obtain primary solution; extracting the primary solution to obtain extraction liquid; carrying out reverse extraction on the extraction liquid to obtain reverse extraction liquid; and electrolyzing the reverse extraction liquid to obtain metal nickel. The precipitating treatment method disclosed by the invention has the advantages that the process flow is environmentally friendly, the energy consumption is low, the recovery for heavy metals is high, the whole production cost is low and the industrial large-scale production can be easily realized.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a precipitation treatment method for 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 indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C25C1/08C22B3/38C22B23/00C22B7/00C02F101/20C02F103/16
CPCC02F1/001C02F1/26C02F1/461C02F1/66C02F9/00C02F2101/20C02F2103/16C02F2301/08C22B7/006C22B23/0453C25C1/08C22B3/3842Y02P10/20
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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