Method for recycling nitric acid deplating waste liquid of clamp for copper line electroplating in PCB plant and complete equipment

Abstract

The invention provides a method for recycling a nitric acid deplating waste liquid of a clamp for copper line electroplating in a PCB plant, and complete equipment. The method is characterized by comprising the following steps: discharging the nitric acid deplating waste liquid of the clamp for copper line electroplating into a waste liquid collecting tank, pumping to a reaction kettle, mixing and stirring the nitric acid deplating waste liquid with a recycling agent according to a certain ratio in the reaction kettle, reacting for a while, pumping a certain amount of the waste liquid into a suction filtration tank in different batches, starting a vacuum pump group, accomplishing solid-liquid separation by using filtering cloth, keeping the waste residue on the filtering cloth, pumping the filtrate to a precise filter from the bottom of the suction filtration tank to filter out impurities, and subsequently collecting the filtrate to a recycled liquid storage tank for use in a nitre clamp cylinder in a production line. The structure is simple, the operation is convenient, copper in the deplating waste liquid is recycled and the regeneration of nitric acid is accomplished.

Description

technical field [0001] The invention relates to a method for regenerating nitric acid deplating waste liquid, which belongs to the field of electroplating waste treatment. Background technique [0002] The electroplating industry can not only improve the protective and decorative performance of products, but also provide many new materials for industrial and agricultural production, so it is an important industrial industry. In the electroplating industry, the electroplating copper process is a widely used process. [0003] In the electroplating process, the hanger as the support of the plated parts is also plated with various metal coatings. And because the hangers are usually used repeatedly, a batch of workpieces can directly enter the next electroplating process after plating. If the hanger is not cleaned in time before it is put into use, it will pollute other working pool fluids and affect product quality. Like the deplating of those unqualified workpieces, most fac...

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Problems solved by technology

However, the above methods, except the chemical precipitation method, all have the problems of complicated operation and high cost. The conventional chemical precipitation method also has to adjust the pH and add several flocculation aids to make the cost difficult to control.

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