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Water comprehensive utilization technology for cleaning electroplating nickel

A technology for cleaning water and electroplating nickel, applied in the electrolysis process, electrolysis components, cells, etc., can solve the problems of affecting the reuse of main salt, low water utilization rate of chemical precipitation method, frequent regeneration of ion exchange method, etc., to reduce resources. Waste, the effect of solving the waste of resources

Inactive Publication Date: 2008-05-07
海宁市海整整流器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the deficiencies in the above-mentioned prior art, and proposes a comprehensive utilization technology of electroplating nickel cleaning water. The technological process is scientific and reasonable, which not only overcomes the problems of low water utilization rate of chemical precipitation method and frequent regeneration of ion exchange method, It also avoids the problem that the high impurity ions caused by the membrane treatment + negative pressure evaporation method affect the reuse of the main salt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A factory discharges 40 tons of nickel-containing waste water every day. The processing of this factory is mainly hanging plating, and the nickel content in the waste water is 30ppm-80ppm. Pre-treatment is carried out first, using a bag filter with a pore size of 50 μm and a security filter with a pore size of 5 μm to filter, and then reverse osmosis treatment, using four-stage treatment, and the concentration factor is 39 times. After the above treatment, the water reuse rate reaches 90%. Add 30% soda ash solution to the concentrated solution, stir while adding, adjust to pH 8-8.5, at this time nickel is completely precipitated in the form of nickel carbonate; precipitate through the inclined tube sedimentation tank, dehydrate the precipitate through a filter press and use hot water Wash until neutral; use sulfuric acid to dissolve the nickel carbonate precipitate, so that the pH of the solution is between 4.5 and 5.5; the solution is left to settle, and the supernatan...

Embodiment 2

[0019] A certain enterprise discharges 20 tons of nickel-containing wastewater every day. The processing of this factory is mainly barrel plating, and the nickel content in the wastewater is 120ppm-180ppm. Pre-treatment is carried out first, using a bag filter with a pore size of 50 μm and a security filter with a pore size of 5 μm to filter, and then reverse osmosis treatment, using three-stage treatment, and the concentration factor is 16 times. After the above treatment, the water reuse rate is 79%. Add 30% soda ash solution to the concentrated solution, stir while adding, adjust to pH 8-8.5, at this time nickel is completely precipitated in the form of nickel carbonate; precipitate through the inclined tube sedimentation tank, dehydrate the precipitate through a filter press and use hot water Wash until neutral; use sulfuric acid to dissolve the nickel carbonate precipitate, so that the pH value of the solution is between 4.5 and 5.5; the solution is left to settle, and the...

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Abstract

This invention relates to a integrated technology for the plating nickel cleanout water, which includes the following steps: filtrating1, condensing, compound decomposing1, dehydrating, compound decomposing2, filtrating2, this technology solves the problem of the low water using rate and the needing for frequently reborning in the chemistry deposition method, and avoids the problem of the high impurity hydronium in the film treatment and minus pressure method. Its water recycle rate reaches to 75%-95%, nickel recycle rate is higher than 95%, which furthest turns the raw materials and energy sources into the output.

Description

technical field [0001] The invention belongs to a comprehensive utilization technology of electroplating wastewater, in particular to a comprehensive utilization technology of electroplating nickel cleaning water. Background technique [0002] As a whole-process pollution control strategy, cleaner production has become a new concept and strategy of environmental protection in the 21st century. It focuses on fundamentally solving environmental problems and realizing sustainable economic and social development. It emphasizes "source reduction" of waste, ie preventing waste before it is generated. Enterprises start from product design, raw material selection, process reform, technological progress and production management to maximize the conversion of raw materials and energy into products, reduce the waste of resources, and minimize the pollutants discharged during the production process and their environmental impact change. In this way, most of the pollution can be contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D21/20
Inventor 钱克邦
Owner 海宁市海整整流器有限公司
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