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Zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water

A technology for electroplating wastewater and treatment process, which is applied in the fields of metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. requirements, etc.

Inactive Publication Date: 2016-05-11
深圳市汇利龙科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] US6162361A, CN102336481A, CN203498176U, CN202754870U, and CN201874981A are some patented technologies based on membrane separation technology. Although they have overcome some of the shortcomings of the terminal centralized treatment mode, they still have complex systems, high treatment costs, and waste water recycling. Not high, high energy consumption of evaporation and concentration, etc.
Especially the pure water produced by the membrane separation device has a minimum electrical conductivity of 5μs / cm. If no further purification treatment is carried out, such water quality cannot meet the water quality requirements of high-quality electroplating at all.
[0009] CN101717136A, CN103374743A, CN201660466U and the patents with the application number 200810219643.X disclose some recycling technologies, but there are some deficiencies in the technologies disclosed in the above-mentioned patents. Achieving true recycling

Method used

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  • Zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water
  • Zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water
  • Zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1: the comparison of adsorption organic matter

[0062] In the first step of copper sulfate electroplating wastewater treatment process, the combination of ion exchange resin and activated carbon is used to adsorb the organic matter, especially the combination of macroporous basic ion exchange resin and activated carbon has excellent adsorption performance and maximizes the removal rate of organic matter. For this adsorption performance, the present invention has carried out comparative test, detected respectively the removal rate of different adsorbents for the acid copper brightener organic matter remaining in copper sulfate electroplating wastewater, the results are shown in Table 1.

[0063] Table 1 The removal rate of different adsorbents for acid copper brightener organic matter

[0064]

[0065] By comparison, it can be seen that VPOC1071+activated carbon, A860+activated carbon, The combination of XAD4+ activated carbon has a better effect ...

Embodiment 2

[0067] Example 2: Zero-discharge online treatment process for copper sulfate electroplating wastewater

[0068] The process flow is as follows:

[0069] 1. The process flow of the copper sulfate electroplating unit is: acid copper electroplating→first-stage water washing→second-stage water washing→third-stage water washing→subsequent treatment. The water flow direction of the electroplating unit is: pure water storage tank→third-level washing tank→second-level washing tank→first-level washing tank→comprehensive wastewater treatment tank. The color of the copper sulfate electroplating wastewater flowing out from the first-stage washing tank is light blue-black. On-site sampling and analysis showed that the composition of the electroplating wastewater discharged from the first-stage washing tank was as follows: copper sulfate 10.60 g / L, sulfuric acid 3.43 g / L, chloride ion 3.5 ppm, acid copper brightener residue concentration 58 ppm.

[0070] 2. The treatment process of acid c...

Embodiment 3

[0080] Example 3: Zero-discharge online treatment process for copper sulfate electroplating wastewater

[0081] The process flow is as follows:

[0082] 1. The process flow of the copper sulfate electroplating unit is: acid copper electroplating→first-stage water washing→second-stage water washing→third-stage water washing→subsequent treatment. The water flow direction of the electroplating unit is: pure water storage tank→third-level washing tank→second-level washing tank→first-level washing tank→comprehensive wastewater treatment tank. On-site sampling and analysis showed that the composition of the electroplating wastewater discharged from the first-stage washing tank was as follows: copper sulfate 10.60 g / L, sulfuric acid 3.43 g / L, chloride ion 3.5 ppm, acid copper brightener residue concentration 58 ppm.

[0083] 2. The treatment process of acid copper electroplating wastewater is:

[0084] Acid copper electroplating wastewater → activated carbon + macroporous alkaline ...

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Abstract

The invention relates to a zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water. The treatment process comprises 1, adsorbing organic matters in the copper sulphate electroplating waste water through combination of active carbon and ion exchange resin, 2, adsorbing heavy metal ions in the waste water treated through the step 1 through ion exchange resin and 3, purifying the electroplating waste water without the organic matters and heavy metal ions through a purified water ion exchange preparation method to obtain deionized water. The organic matters in the copper sulphate electroplating waste water are removed through the combination of active carbon and ion exchange resin so that the organic matters in the copper sulphate electroplating waste water are completely removed and a regeneration period and a service life of the later resin are prolonged. Through the zero-discharge on-line treatment process, the copper sulphate electroplating waste water is completely purified to form deionized water satisfying electroplating water quality requirements and the prepared deionized water is returned to a copper sulphate electroplating unit so that water use and waste water treatment processes in the copper sulphate electroplating unit form a closed cycle and thus 100% recycle is realized.

Description

technical field [0001] The invention relates to a zero-discharge online treatment and reuse process for preparing deionized water from copper sulfate electroplating wastewater, and belongs to the technical field of industrial wastewater treatment. Background technique [0002] There are many electroplating wastewater treatment processes, such as: physical adsorption method, ion exchange method, evaporation concentration method, chemical precipitation method, redox method, biochemical treatment method, membrane separation method, etc. The components of electroplating wastewater are different, and the treatment methods are also different. As long as it is applicable, one of the above methods can be used for treatment alone, or several combinations of the above methods can be used for treatment. [0003] A common wastewater treatment process is to use a combined method to implement a two-stage terminal centralized treatment of electroplating wastewater. The electroplating work...

Claims

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Application Information

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IPC IPC(8): C02F9/04C25D21/22C02F103/16
Inventor 成建华林雪春
Owner 深圳市汇利龙科技有限公司
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