A kind of process method for treating electroless nickel plating waste water
A technology of electroless nickel plating and process method, which is applied in the direction of chemical instruments and methods, metallurgical wastewater treatment, water/sewage multi-stage treatment, etc. It can solve the problems of cumbersome process steps and long time for electroless nickel plating wastewater, and achieve cost savings , the time required is short, and the effect of reducing the cost of use
Active Publication Date: 2016-09-07
SHENZHEN LVQIN ENVIRONMENTAL PROTECTION TECH CO LTD
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[0004] In order to solve the above-mentioned problems of cumbersome process steps and long time for treating electroless nickel plating wastewater, the wastewater treatment method provided by the present invention does not require extraction, separation, and oxidation. The process steps are simple and the required time is short, which can greatly improve the efficiency of wastewater processing efficiency and save implementation cost
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[0026] In order to better illustrate the present invention, further description will now be made in conjunction with the accompanying drawings.
[0027] The present invention proposes a kind of processing method of chemical electroless nickel plating waste water, and it comprises the steps:
[0028] a. Precipitation: The electroless nickel plating wastewater is discharged to the waste water pool in a concentrated manner. After precipitation, the supernatant liquid is transported to the pH adjustment pool through the lifting pump;
[0029] b. pH adjustment: add a pH regulator to the pH adjustment pool to adjust the pH of the clear liquid to 5-6;
[0030] c. Removal of organic matter: the clear liquid after adjusting the pH value is first passed into the organic matter removal resin column to remove the organic matter in the electroless nickel plating wastewater;
[0031] d. Nickel removal: pass the clear liquid after organic matter removal into two nickel-removing resin column...
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The invention relates to a method for treating sewage, in particular to a method for treating wastewater produced by electroless nickel plating. In this treatment method, the waste water after electroless nickel plating is discharged to the waste water pool in a concentrated manner. After precipitation, the supernatant liquid is transported to the pH adjustment pool through the lifting pump, and a pH regulator is added in the pH adjustment pool to reduce the pH value of the clear liquid. Adjust to 5‑6, and then pass the adjusted pH value of the supernatant into two nickel-removing resin columns in sequence. After two times of nickel removal, the nickel ion content in the supernatant is lower than 0.1mg / L, and finally remove the Other ions in the clear liquid are directly deionized after the pH of the waste water clear liquid is adjusted, without extraction, separation and oxidation processes. This method has simple process steps, can greatly improve the treatment efficiency of waste water, and save implementation costs , and first carry out nickel removal treatment, the content of nickel ions in the treated clear liquid is lower than 0.1mg / L, so as to avoid the effect of phosphorus removal, COD removal and ammonia nitrogen removal in subsequent steps from being affected by the high concentration of nickel ions.
Description
technical field [0001] The invention relates to a method for treating sewage, in particular to a method for treating wastewater produced by electroless nickel plating. Background technique [0002] Electroless nickel plating appears as a new surface treatment process, and its scope of application continues to expand, and has penetrated into various sectors such as the chemical industry, automobile industry, and electronics industry. However, electroless nickel plating wastewater contains a large amount of metallic nickel, high concentrations of COD , ammonia nitrogen, phosphite and hypophosphite; the discharge of such high-concentration wastewater not only pollutes water bodies, endangers human health, but is also a waste of resources. Due to the complex composition of the electroless nickel plating waste liquid, the treatment of the waste liquid is relatively difficult and the cost is relatively high. At present, there is no particularly perfect process for the treatment of...
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IPC IPC(8): C02F9/04C02F103/16
Inventor 郭聪
Owner SHENZHEN LVQIN ENVIRONMENTAL PROTECTION TECH CO LTD