Single-membrane and double-chamber electrolytic copper and chlorine regeneration system and process for acidic chlorine salt waste etching solution

Abstract

The invention discloses a single-membrane and double-chamber electrolytic copper and chlorine regeneration system and process for an acidic chlorine salt waste etching solution and belongs to the technical field of recycling equipment for an acidic etching solution, a hardware etching acidic waste solution and a mine acidic chlorine salt copper-containing waste solution of a printed circuit board.The system comprises an online acidic etching machine, a single-membrane and double-chamber electrolyzing device, a regenerated liquid blending device, a regenerated liquid injecting and absorbing device, a chlorine recycling device, a low-temperature water curtain absorbing device, a power wave absorbing device and a rotational flow spraying device. By adopting a process of electrolyzing copperby the single-membrane and double-chamber electrolyzing device and recycling chlorine by the chlorine recycling device for the acidic etching waste solution generated by the acidic etching machine, problems in the processes such as a substitution method, an ion member electrolytic process, a sulfuric acid distillation method and a diaphragm electrolytic process in the prior art are improved, low cost acidic chlorine salt etching waste solution regeneration and circulation can be realized truly, and targets of clean production and improvement of economical benefits of a PCB enterprise are achieved.

Description

technical field [0001] The present invention relates to a recycling system and process for acidic etching waste liquid, in particular to a single-membrane double-chamber electrolytic copper and chlorine regeneration system and process for acidic chlorine salt etching waste liquid, belonging to acidic etching waste liquid for printed circuit boards and hardware etching The technical field of recycling equipment for acid waste liquid and mine acid chloride salt copper-containing waste liquid. Background technique [0002] The PCB industry, like the paper industry, textile industry, and decorative electroplating industry, is not only a major water user, but also a major environmental polluter, and produces a large amount of corrosive waste liquid every year. In the process of producing printed circuit boards (PCB) and hardware accessories, acid chloride salt etching process and alkaline chloride salt etching process are usually used, wherein the main components of acid chloride...

AI Technical Summary

Problems solved by technology

This method needs to add a large amount of sulfuric acid to replace copper chloride with copper sulfate, and copper chloride cannot be completely replaced by sulfuric acid to copper sulfate. The production process is complicated and the risk is high.

[0006] 4. Diaphragm electrolysis method: The currently used diaphragm electrolysis is affected by the distance between workshops and production volume, which leads to low chlorine recycling efficiency, and also causes 20%-30% expansion of the potion during the recycling process of etching waste liquid, and produces a large number of side effects. The product is ferric chloride and sodium hypochlorite solution; in addition, the equipment structure is complicated to install and the electrolysis efficiency is low

Images