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Device and method for treating wastewater of chemical nickel plating

A technology for wastewater treatment and chemical nickel plating, which is applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, special compound water treatment, etc. Effect

Pending Publication Date: 2019-04-02
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, zinc-nickel alloy electroplating wastewater is also a relatively difficult chemical nickel plating wastewater

Method used

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  • Device and method for treating wastewater of chemical nickel plating
  • Device and method for treating wastewater of chemical nickel plating

Examples

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Effect test

Embodiment 1

[0032] Such as figure 1 An electroless nickel plating wastewater treatment equipment is shown, and the electroless nickel plating wastewater treatment equipment sequentially includes a pretreatment device, an electrodialysis device, a tubular microporous filtration device, and a metal recovery device. Wherein the pretreatment device sequentially includes a Fenton oxidation unit, a flocculation sedimentation unit, and a sand filtration unit. The tubular microporous filter device is connected to the pretreatment device, and the flow between the tubular microporous filter device and the pretreatment device is unidirectional.

[0033] The electroless nickel plating wastewater enters the pretreatment device, and ferrous sulfate and hydrogen peroxide are added in the pretreatment device. processing, into the electrodialysis unit. During the electrodialysis process, the anions and cations in the solution are enriched in the concentrated electrodialysis chamber, while nickel ions as...

Embodiment 2

[0041] As shown in Example 1, the difference is only that, in the electrodialysis device, when the catalyzed negative membrane is used to prepare the base film of the negative membrane, the ruthenium iridium balls with a diameter of 0.05-0.1 mm are evenly distributed in the base membrane; The ruthenium iridium ball adopts titanium microspheres with a diameter of 0.04-0.08 mm, and the surface coating of the titanium microspheres is coated according to the ratio of the mass of ruthenium oxide: the mass of iridium oxide = 1:1-1:5, and the coating The layer temperature is 580°C-650°C.

Embodiment 3

[0043] As shown in Example 1, the only difference is that the thickness of the catalytic negative film is 0.05-0.01 mm.

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Abstract

The invention discloses a device and method for treating wastewater of chemical nickel plating. The device for treating the wastewater of chemical nickel plating comprises a pretreatment device, an electrodialysis device, a tubular microporous filter device and a metal recovery device sequentially. Techniques of homogeneous membrane electrodialysis and electrocatalytic oxidation are combined by the device. In the electrodialysis process, anions and cations in a solution are enriched in a concentrating compartment of electrodialysis, and cationic nickel ions are continuously enriched in the electrodialysis concentrating compartment, and get close to a negative membrane; a nickel-reduction catalyst is compounded on the side, facing the concentrating compartment, of the negative membrane so as to catalyze a cathode reduction reaction of the nickel ions and produce nickel powder, and electrodialyzed fresh water flows out through an electrodialysis cycle so as to achieve recycling; and thenickel powder can be recycled through a microporous filter. The device has a simple structure, used chemicals can be saved effectively, and the advantages of energy saving and environmental protection, high nickel recovery rate and material saving are achieved.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to an electroless nickel plating waste water treatment equipment and a method thereof. Background technique [0002] The electroless nickel electroplating wastewater is produced by electroless nickel plating. During electroless plating, some electroless nickel electroplating solution will stick to the parts. The wastewater generated by flushing contains a small amount of electroplating solution. Concentrated electroplating solution makes wastewater difficult to treat. The chemical stability of chemical nickel is high, the activation energy is very low, and it needs high chemical energy to destroy it. Therefore, as a type of pollutant, the workshop emission limit mostly adopts ferrous sulfate + hydrogen peroxide Fenton process to destroy nickel. [0003] Electroless nickel electroplating wastewater mainly contains three types of components, nickel ions, complexing agents, and hy...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F103/16C02F101/20
CPCC02F9/00C02F1/4693C02F1/444C02F1/722C02F1/5281C02F2101/20C02F2103/16C02F2001/007C02F2209/03C02F2209/02C02F2305/026
Inventor 金可勇胡鉴耿金水玉付晓靖
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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