Method and device for online regeneration treatment of hardware etching waste liquid

Abstract

The invention discloses a method for online regeneration treatment of a hardware etching waste liquid. The method for online regeneration treatment of the hardware etching waste liquid comprises the following steps that firstly, the etching waste liquid generated by a hardware etching production line is conveyed to a waste liquid treatment regeneration groove so that electrolysis catalysis is conducted after being filtered by a electroplating filtering machine; secondly, regenerated etching liquid in the waste liquid treatment regeneration groove is conveyed to a water injector so that chlorine is absorbed in a forced manner, the regenerated etching liquid after absorption flows back to the waste liquid treatment regeneration groove, and the step is repeated constantly; and thirdly, treated regenerated etching liquid returns to the hardware etching production line again through overflowing and is used, the oxidation-reduction potential (ORP) value and the electric current density of the hardware etching liquid are controlled, and the acidity and proportion of the hardware etching liquid are controlled. By means of the method for online regeneration treatment of the hardware etchingwaste liquid, the purposes of reducing waste liquid discharging amount, reducing external transportation, protecting the environment, and meanwhile, reducing replenishing of medicaments such as an oxidizing agent and lowering the production cost can be achieved.

Description

technical field [0001] The invention relates to the field of metal etching, in particular to a process method for on-line regeneration treatment of metal etching waste liquid and a special device thereof. Background technique [0002] In the construction of the national economy, the metal etching industry has also developed rapidly, but a large amount of metal etching waste liquid will be produced in the production process, which is the same as the copper etching waste liquid produced in the PCB production process. Difficult to handle and dispose of liquid waste. [0003] At present, in the PCB production process, there is already a mature method for regenerating and reusing copper etching waste liquid. However, for metal etching waste liquid, there is no regeneration process in China at present, which is still a blank. In the past, various manufacturers added water to the metal etching waste liquid to dilute it, added alkali to increase the pH value, and then discharged i...

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Problems solved by technology

Although this treatment method avoids certain safety and environmental protection issues; however, this treatment of waste liquid not only wastes resources, but also increases the production cost sharply, which increases the burden on the enterprise. risks of

Therefore, it is very necessary to develop a process method capable of electrolytic regeneration and treatment. However, due to the strong acidity of the metal etching waste liquid, the requirements for the material of the plate are very high, and it is difficult to recycle iron. In addition, the metal etching waste liquid It contains a large amount of metal impurities, which brings many difficulties to the process of electrolysis and regeneration treatment. Compared with it, it feels that the value of regenerating metal etching waste liquid is not very great. The above factors have led to the production enterprises' research and development of regeneration technology. Nobody cares

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