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Method for reclaiming nickel from acidic nickel plating waste water

A technology for acidic nickel plating and waste water, which is applied to the improvement of process efficiency, the control of various fluid ratios, and instruments, etc. It can solve the problems that nickel recovery cannot be achieved and the cleaning effect of plated parts is affected, and the difficulty and workload of operators can be reduced. , Guarantee adsorption efficiency and avoid interference effect

Inactive Publication Date: 2010-09-08
SHANGHAI LIGHT IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, the applicant found that when the pH value of the wastewater drops to a certain value (such as 4.0), this interference effect will cause the purpose of nickel recovery to fail to be achieved, and the excessively high nickel ion concentration in the recycled water will affect the cleaning of the plated parts Effect

Method used

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  • Method for reclaiming nickel from acidic nickel plating waste water
  • Method for reclaiming nickel from acidic nickel plating waste water
  • Method for reclaiming nickel from acidic nickel plating waste water

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Embodiment Construction

[0019] Firstly, the working process of the recovery equipment is described in conjunction with Fig. 1. During the nickel plating production process, the plated parts are first dipped in the recovery tank 12, and then cleaned in the first rinsing tank 13 and the second rinsing tank 14 respectively. The recovery tank 12 contains a relatively high concentration of nickel ions carried out from the nickel plating tank 11 , and these nickel ions are brought into the first rinse tank 13 along with the plated pieces. The nickel-containing wastewater is pumped out from the first rinsing tank 13 by the water pump 15 into the nickel-plating wastewater recovery equipment, and passes through the first exchanger 16, the second exchanger 17 and the third exchanger 18 successively, and the nickel ions in the wastewater are adsorbed on the cations The resin is exchanged, and the purified water is sent to the second rinsing tank 14 for reuse through pipelines.

[0020] It should be pointed out ...

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Abstract

The invention relates to a method for recovering nickel from acidic nickel-plating waste water, which lets the waste water from an electric-plating rinsing groove to pass at least one ion exchanger to carry out ion exchanging so as to recover nickel. The method additionally comprises: using a pH sensor to detect the pH value of the waste water at an inlet pipe of the ion exchanger; comparing the pH value of the waste water with a critical pH value; and controlling a water supplementing mechanism to supplement water to the rinsing groove based on the comparison result. The invention provides proper pH value for ion exchanging, avoids disturbance from any acid on the adsorption of nickel ions, guarantees the adsorption efficiency and improves the quality of return water.

Description

technical field [0001] The invention relates to a waste water treatment technology of an ion exchange method, in particular to a method for recovering nickel from acidic nickel plating waste water. Background technique [0002] In water treatment technology, the ion exchange resin method is commonly used to treat electroplating wastewater. The simple process is that the plated parts are first dipped in the recovery tank during the nickel plating production process, and then cleaned in the rinse tank respectively. The recovery tank contains a relatively high concentration of nickel ions brought out from the nickel plating tank, and these nickel ions are brought into the rinse tank with the plated parts, and the waste water in the rinse tank can be pumped to a nickel-plating wastewater recovery device, and the nickel ions are absorbed by the ions in the rinse tank. The exchange resin is adsorbed and recovered, and the waste water after nickel recovery is reused as cleaning wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/00C22B3/42G05D21/02
CPCY02P10/20
Inventor 王维平
Owner SHANGHAI LIGHT IND RES INST