System for circulating and regenerating waste acidic etching solutions with tail gas treatment function

Abstract

The invention discloses a system for circulating and regenerating waste acidic etching solutions with a tail gas treatment function. The system comprises an etching solution treatment system and a chlorine gas recycling system, wherein the etching solution treatment system comprises an etching production line (1), a mother solution storage tank (2), an electrolytic tank and a dissolving and absorbing system (6); the electrolytic tank comprises a cathode tank (3) and an anode tank (5); the mother solution storage tank (2), the cathode tank (3), the anode tank (5) and the dissolving and absorbing system (6) are connected with one another in sequence; the etching production line (1) is connected with the mother solution storage tank (2) and the dissolving and absorbing system (6) respectively; the chlorine gas recycling system comprises a gas inlet system (7) and a tail gas treatment system (8); the anode tank (5), a gas washing system (7) and the tail gas treatment system (8) are connected with one another in sequence. The system has the beneficial effects that the system can be used for treating the waste acidic etching solutions, the off-line production can be implemented, the cost can be reduced, the resources can be saved, and the environmental pollution can be avoided.

Description

technical field [0001] The invention relates to a waste liquid treatment system, in particular to an acid etching waste liquid recycling and regeneration system with tail gas treatment function. Background technique [0002] Acid etchant is an etchant used for the production of fine lines on printed circuit boards and the production of inner layers of multi-layer boards. With the rapid development of the modern electronics industry, the number of circuit board production enterprises has increased rapidly. The industrial wastewater of such enterprises has serious environmental pollution, and the content of copper ions in such industrial wastewater is very high. Therefore, the wastewater and waste liquid produced by circuit board manufacturers The serious environmental pollution and waste of resources caused by it are increasingly concerned by the society. In order to avoid waste and protect the environment, acid etching solution needs to be recycled and reused. [0003] The...

AI Technical Summary

Problems solved by technology

However, the total copper continues to increase, and eventually a part of the acidic etching solution needs to be excluded to maintain a certain total copper concentration, which not only pollutes the environment, but also causes a lot of waste of copper and acid; the electrochemical regeneration method is an online regeneration method. Metal copper with commercial value can be produced through electrolysis, but at the same time, chlorine gas is produced to form polluting tail gas, which not only pollutes the environment but also causes waste

[0004] The Chinese patent application number is 201020567155.0, which discloses a regeneration system for acidic etching solution containing copper ions. The exhaust gas treatment device inside the system consumes the chlorine element inside the system. Although it achieves environmental protection, it leads to waste of resources and the loss of chlorine element inside the system. It is necessary to add additional acid to ensure the efficiency of the etching solution.

Images