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Method for recovering nickel from electroplating centralized control wastewater

A waste water recovery and centralized control technology, which is applied in the direction of metallurgical waste water treatment, chemical instruments and methods, and process efficiency improvement, can solve the problems of unsatisfactory recovery effect, complicated treatment methods, and high treatment costs, so as to protect the environment and improve The effect of electrolysis rate and simple operation

Inactive Publication Date: 2014-02-12
NANAN XUFAN METAL RECYCLING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for recovering nickel from electroplating centralized control wastewater to overcome the complex treatment methods existing in the existing wastewater metal nickel recovery technology in centralized control areas, the sludge needs secondary treatment, the treatment cost is high, and the recovery effect is not ideal. waste of resources etc.

Method used

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  • Method for recovering nickel from electroplating centralized control wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] Treatment of nickel-containing wastewater containing 0.5g / L nickel, pH 5-6, water temperature 20-30 degrees, and adsorption flow 10BV / H:

[0029] refer to figure 1 A method for recycling nickel from electroplating centralized wastewater treatment, comprising the following steps carried out in sequence:

[0030] a. Collection: collect nickel-containing wastewater and homogenize;

[0031] b. Filtration: Wastewater enters the multi-media filter for filtration treatment to remove solid particle impurities;

[0032] c. Adsorption: after the filtrate in step b is adjusted to PH to 3, it passes through an adsorption device filled with nickel high-selectivity resin, so that most of the nickel ions are adsorbed on the nickel high-selectivity resin; the adsorption device is composed of two resin columns connected in series, That is, the liquid outlet of the first resin column is connected with the liquid inlet of the second resin column, and the two resin columns are filled wit...

Embodiment approach 2

[0041] The method for reclaiming nickel from electroplating centralized control wastewater comprises the following steps carried out in sequence:

[0042] a. Collection: collect nickel-containing wastewater and homogenize;

[0043] b. Filtration: Wastewater enters the multi-media filter for filtration treatment to remove solid particle impurities;

[0044]c. Adsorption: After the filtrate in step b is adjusted to pH 3, it passes through the resin column filled with Lanxiao LSC-100 (amino carboxylic acid) resin, so that most of the nickel ions are adsorbed on Lanxiao LSC-100 resin; the resin column After adjusting the PH to PH = 6 ~ 9, the effluent can be directly discharged or used for cleaning nickel-plated and chrome-plated parts;

[0045] d. Regeneration: Wash the nickel ions adsorbed on Lanxiao LSC-100 resin with 10% hydrochloric acid to obtain a regeneration solution. The concentration of nickel ions in the regeneration solution is about 20g / L;

[0046] e. Impurity remo...

Embodiment approach 3

[0049] The method for reclaiming nickel from electroplating centralized control wastewater comprises the following steps carried out in sequence:

[0050] a. Collection: collect nickel-containing wastewater and homogenize;

[0051] b. Filtration: Wastewater enters the multi-media filter for filtration treatment to remove solid particle impurities;

[0052] c. Adsorption: after the filtrate of step b is adjusted to PH to 3, pass through the resin column filled with Dusheng CH-90 resin, so that most of the nickel ions are adsorbed on the Dusheng CH-90 resin; the flow rate of the filtrate entering the resin column is 40m 3 / h; the effluent of the resin column can be directly discharged after adjusting the PH to PH=6~9 or used for cleaning nickel-plated and chrome-plated parts;

[0053] d. Regeneration: Wash the nickel ions adsorbed on Dusheng CH-90 resin with 10% hydrochloric acid to obtain a regeneration solution. The concentration of nickel ions in the regeneration solution i...

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Abstract

The invention relates to a method for recovering nickel from electroplating centralized control wastewater. The method comprises the following steps in sequence: a, collecting; b, filtering; c, adsorbing, i.e., enabling filtrate obtained in the step b to pass through an adsorption device filled with nickel high-selectivity resin; d, regeneration, i.e., washing out nickel ions adsorbed on the resin by acid liquid to obtain regenerated liquid; e, impurity removal, i.e., sequentially carrying out oxidation sedimentation and resin adsorption processing on the regenerated liquid; f, electrolysis, i.e., using a rhodanized titanium plate as an anode, using a titanium plate as a cathode and carrying out electrolysis under the current density of 150 to 300A / m<2> to obtain a nickel plate. According to the invention, due to adoption of Tulsion CH-90 resin, nickel solution with relatively high concentration can be obtained; the method is beneficial for reducing electrolysis cost of subsequent electrolysis; interference ions with serious influence on nickel electrolysis are removed by three impurity removal processes; the method also improves the electrolysis rate of nickel ions and improves the recovery rate of nickel by selecting the suitable anode and cathode, does not generate sludge and not only is environmental-friendly, but also effectively reduces treatment cost.

Description

technical field [0001] The invention relates to a method for recovering nickel from wastewater, in particular to a method for recovering nickel from electroplating centralized control wastewater. Background technique [0002] The electroplating centralized control area is a new type of electroplating production organization model, which adopts the industrial centralized control area mode of "centralized production, centralized management, centralized governance, and centralized monitoring". The creation of electroplating centralized control areas can realize the market-oriented operation of centralized wastewater treatment, ensure that the electroplating enterprises in the area discharge pollutants up to standard, and minimize the impact on the surrounding environment. However, there are many enterprises involved in the electroplating centralized control area, and there are many types of plating, so the treatment of electroplating wastewater is very complicated. However, mo...

Claims

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Application Information

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IPC IPC(8): C25C1/08C02F9/02C02F1/28C02F103/16
CPCY02P10/20
Inventor 吴健陈锦怀李建斌林腾腾姚辉福
Owner NANAN XUFAN METAL RECYCLING CO LTD
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