Acidic etching waste liquid regeneration and copper recovery device

Abstract

The invention provides an acidic etching waste liquid regeneration and copper recovery device which comprises a filter pump, an electrolysis bath, a current controller, a solid-liquid separator, a catholyte storage tank and a mixing tank, wherein the electrolysis bath is divided into a cathode chamber and an anode chamber by a cation membrane arranged in the electrolysis bath; a cathode plate is arranged in the cathode chamber, an anode plate is arranged in the anode chamber, and the cathode plate and anode plate are respectively connected with the current controller; one end of the filter pump is provided with an etching waste liquid inlet, and the other end is respectively connected with the cathode chamber and anode chamber through pipelines; an input end of the solid-liquid separator is connected with the cathode chamber, and an output end is connected with the catholyte storage tank; the catholyte storage tank and cathode chamber are connected through a pipeline to form an independent closed cycle; an input end of the mixing tank is respectively connected with an output end of the anode chamber and an output end of the catholyte storage tank; and the mixing tank is also provided with a regenerated liquid discharge port. The device has the advantages of no discharge of three wastes in the technical process and low production cost.

Description

technical field [0001] The invention relates to the fields of environmental protection treatment of industrial wastewater and metal copper recovery, in particular to a device for regeneration of acidic etching waste liquid and copper recovery, in particular to a device for regeneration of acidic etching waste liquid and copper recovery of printed circuit boards. Background technique [0002] With the annual growth rate of my country's electronics industry exceeding 20%, it has driven the development of printed circuit board (PCB) and related industries, and my country has become the world's largest PCB production center. Etching technology is an indispensable process in the current manufacturing of PCB An important step, in the production process of printed circuit boards, acid and alkaline etching processes are usually used to produce circuit boards, and these companies produce a large amount of corrosive waste liquid every year. However, as one of the etching methods, the ac...

AI Technical Summary

Problems solved by technology

This method needs to add a large amount of sulfuric acid to convert CuCl 2 Replaced with copper sulfate, because copper sulfate is a chemical product, it needs to have special chemical production qualifications. However, circuit board manufacturers do not have production qualifications

[0009] There are various drawbacks in the above four methods of recovering copper from waste acid etching solution, which are not conducive to the application in production

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