Cyclone treatment technique of nickel-containing electroplating wastewater

A technology of nickel electroplating and flow treatment, which is applied in the field of cyclone treatment process of nickel-containing electroplating wastewater, can solve the problems of low adsorption selectivity, failure to be popularized, high operating costs, etc., achieve strong technical and cost advantages, and reduce technical risks , the effect of easy operation

Inactive Publication Date: 2015-06-24
江苏地一环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used adsorbent is activated carbon, but it is expensive, has a short service life, requires regeneration, and is expensive to operate
In addition, the adsorption method has a wide range of applications in the treatment of heavy metal-containing wastewater and will not cause secondary pollution. However, the adsorption selectivity of the adsorbent for heavy metal ions is often not high, so it cannot be well promoted.
[0012] In summary, the existing technologies for treating nickel-ion-containing electroplating wastewater have disadvantages such as complex process, difficult control, secondary pollution, and low removal rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of cyclone treatment process of nickel-containing electroplating wastewater, the steps are as follows:

[0033] 1) Precision filtration: the nickel-containing electroplating wastewater is subjected to precision filtration to remove large particles of impurities in the wastewater;

[0034] 2) The waste liquid after precision filtration enters the P204 extraction and impurity removal stage: the total number of extraction stages is 18, including 7 stages of extraction, 4 stages of washing, and 7 stages of back extraction;

[0035] 3) The solution after extraction and removal of impurities enters the P204 nickel extraction stage: a total of 9 stages of extraction, including 5 stages of extraction and 4 stages of back extraction;

[0036] 4) Production of cathode nickel by swirl electrolysis: Step 3) The extract solution after nickel extraction in step 3) obtains a qualified nickel sulfate solution after degreasing and sends it to the swirl electrolysis nickel worksho...

Embodiment 2

[0042] A kind of cyclone treatment process of nickel-containing electroplating wastewater, the steps are as follows:

[0043] 1) Precision filtration: the nickel-containing electroplating wastewater is subjected to precision filtration to remove large particles of impurities in the wastewater;

[0044]2) The waste liquid after precision filtration enters the P204 extraction and impurity removal stage: the total number of extraction stages is 18, including 7 stages of extraction, 4 stages of washing, and 7 stages of back extraction;

[0045] 3) The solution after extraction and removal of impurities enters the P204 nickel extraction stage: a total of 9 stages of extraction, including 5 stages of extraction and 4 stages of back extraction;

[0046] 4) Production of cathode nickel by swirl electrolysis: Step 3) The extract solution after nickel extraction in step 3) obtains a qualified nickel sulfate solution after degreasing and sends it to the swirl electrolysis nickel workshop...

Embodiment 3

[0052] A kind of cyclone treatment process of nickel-containing electroplating wastewater, the steps are as follows:

[0053] 1) Precision filtration: the nickel-containing electroplating wastewater is subjected to precision filtration to remove large particles of impurities in the wastewater;

[0054] 2) The waste liquid after precision filtration enters the P204 extraction and impurity removal stage: the total number of extraction stages is 18, including 7 stages of extraction, 4 stages of washing, and 7 stages of back extraction;

[0055] 3) The solution after extraction and removal of impurities enters the P204 nickel extraction stage: a total of 9 stages of extraction, including 5 stages of extraction and 4 stages of back extraction;

[0056] 4) Production of cathode nickel by swirl electrolysis: Step 3) The extract solution after nickel extraction in step 3) obtains a qualified nickel sulfate solution after degreasing and sends it to the swirl electrolysis nickel worksho...

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Abstract

The invention discloses a cyclone treatment technique of nickel-containing electroplating wastewater. By adopting a cyclone technique which is completely different from the traditional technique for electrodepositing nickel, the current efficiency can reach 90% above which is much higher than 75% in the traditional nickel electrodeposition. The current density is 600-800 A / m<2> which is more than twice higher than that of the traditional technique. Besides, the nickel product produced by the technique has the advantages of stable quality and low requirements for impurity content in the catholyte. The technique can decrease civil engineering investment, and has the advantages of low production cost, high degree of mechanization, low workshop labor requirement, low worker labor intensity and the like.

Description

technical field [0001] The invention relates to the technical field of electrolytic recovery, in particular to a swirl flow treatment process for nickel-containing electroplating wastewater. Background technique [0002] As a corrosion-resistant metal, nickel is widely used in the electroplating industry. However, if the electroplating nickel-containing wastewater produced in the electroplating process is discharged directly without treatment, it will cause serious environmental pollution. [0003] At present, the recycling and treatment technologies of nickel-containing electroplating wastewater include solvent extraction, chemical precipitation, ion exchange and adsorption. [0004] 1. Solvent extraction method [0005] Solvent extraction is a separation method that uses the difference in solubility of heavy metal ions in the organic phase and in water to concentrate heavy metals in the organic phase. The organic phase is also called extractant, and the common ones are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C25C1/08C02F101/20C02F101/22C02F103/16
Inventor 王中华
Owner 江苏地一环保科技有限公司
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