ZERO-EMISSION ACIDIC ETCHING WASTE SOLUTION REUSE AND RECOVERY METHOD AND SYSTEM

摘要

Provided are a zero-emission acidic etching waste solution reuse and recovery method and system. The method comprises a number of steps, including: performing an electrolysis operation; performing a chlorine gas treatment; and performing a recovered solution treatment. An acid concentration technique and a tail-gas recycling and reuse technique are employed to effectively remove metallic copper from an etching waste solution and enable recovery and reuse of the etching solution, thereby preventing generation of any waste solution, and realizing zero emission. The zero-emission acidic etching waste solution reuse and recovery system comprises: an etching solution treatment system; a recovered solution reuse system; a solution distribution system; and a chlorine gas recycling system. The etching solution treatment system comprises: an etching production line (1); a mother liquor storage tank (2); an electrolytic cell; and a dissolution and absorption system (6). The electrolytic cell comprises a cathode compartment (3) and an anode compartment (5). The recovered solution reuse system comprises a recovered solution storage tank (10) and a recovered solution treatment system (11). The zero-emission acidic etching waste solution reuse and recovery system is configured to treat an acidic etching waste solution, and can extract metallic copper, perform an off-line production operation, save costs and resources, and prevent environmental pollution.