Electroplating chromium-free coarsening chemical solution purifying and recycling system and method

Abstract

The invention relates to the technical field of recycling of coarsening solutions, in particular to an electroplating chromium-free coarsening chemical solution purifying and recycling system and method. According to the method, technical principles of low-pressure high-temperature steam distillation and membrane filtration are adopted, a chromium-free chemical solution is heated by means of low-pressure steam, and then the chromium-free chemical solution is separated from water through negative pressure distillation; and water steam is filtered in a precision membrane filtration mode, and the effect of thoroughly separating the chromium-free chemical solution from the water is achieved. Solid impurities in the chromium-free chemical solution are removed, the cleanliness degree of the chromium-free chemical solution is high after dewatering is conducted, the purifying treatment effect is stable, the recycling rate is high, energy conservation and environment protection are achieved, and the operation cost of an enterprise can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of recycling roughening solutions, in particular to a system and method for purifying and recycling high-purity chromium-free roughening chemical solutions. Background technique [0002] With the rapid development of my country's industrialization, how to control the operating costs of enterprises has been paid more and more attention. [0003] In the technical field of chemical roughening process, the roughening process is very important before the workpiece is electroplated. In the past, a sulfuric acid roughening solution containing chromic anhydride was generally used. However, chromic anhydride is expensive and expensive, and belongs to Carcinogenic substances will seriously pollute the environment. Therefore, the current roughening process adopts chromium-free chemical solution, which mainly contains sulfuric acid, strong oxidizing agent, surfactant and other main components combined in a certain propo...

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Problems solved by technology

[0003] In the technical field of chemical roughening process, the roughening process is very important before the workpiece is electroplated. In the past, a sulfuric acid roughening solution containing chromic anhydride was generally used. However, chromic anhydride is expensive and expensive, and belongs to Carcinogenic substances will seriously pollute the environment. Therefore, the current roughening process adopts chromium-free chemical solution, which mainly contains sulfuric acid, strong oxidizing agent, surfactant and other main components combined in a certain proportion.

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