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

A waste liquid treatment and etching waste liquid technology, applied in the electrolysis process, electrolytic components, etc., can solve the problems of low value of metal etching waste liquid, difficult electrolysis and regeneration process, high plate material requirements, etc., to achieve The treatment effect is obvious, the equipment is less, and the effect of cost reduction

Active Publication Date: 2019-11-19
SHENZHEN ZHONGKE OUTAIHUA ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0027] A method for on-line regeneration treatment of metal etching waste liquid, which adopts membrane electrolysis technology, sucks a small amount of chlorine gas produced by electrolysis and catalysis through a water injector, and circulates and absorbs it, specifically including the following steps:

[0028] Step 1. Waste liquid treatment: After filtering the etching waste liquid produced by the metal etching production line through the electroplating filter, it is sent to the waste liquid treatment regeneration tank for electrolytic catalysis. The metal etching waste liquid mainly contains Fe 2+ and Fe 3+ , HCl, H 2 O, metal impurities and other components, waste liquid treatment regeneration tank adopts ionic membrane technology, and uses titanium alloy composite material electrode plate, according to the control index of the etching production line, according to the Fe in the etching waste liquid 2+ The amount, and by controlling the current density to control the gen...

Embodiment 2

[0033] Such as figure 1 and figure 2 As shown, the device used in the method for on-line regeneration treatment of metal etching waste liquid in the present invention includes a metal etching production line 2 and a waste liquid treatment regeneration tank 3, and the lower outlet of the hardware etching production line 2 passes through a regeneration liquid delivery pump 1 and an electroplating filter 6 in sequence It is connected to the upper inlet of the waste liquid treatment regeneration tank 3, and the lower outlet of the waste liquid treatment regeneration tank 3 is connected to the upper entrance of the waste liquid treatment regeneration tank 3 through the waste liquid circulation pump 4 and the water ejector 5 in turn, and the waste liquid treatment regeneration tank The upper overflow port of 3 links to each other with the upper entrance of metal etching production line 2.

[0034] The waste liquid treatment regeneration tank 3 includes a tank body 301, and a plura...

Embodiment 3

[0037] In the operation of the metal etching production line, the acidity of the etching solution is controlled at 1.96mol / L; the specific gravity of the etching solution is controlled at 1.5, and the ORP value of the etching solution is controlled at 680mV; the etching waste liquid of the metal etching production line is sent to waste liquid treatment for regeneration Electrolytic catalysis is carried out in the tank, and the electrolytic current intelligent control method is adopted to control the current density of 10ASD, and a small amount of Cl produced 2 The amount is absorbed by the waste liquid circulation pump and water ejector, and the absorbed etching liquid overflows back to the metal etching production line for use.

[0038] The results after treatment are as follows: 62.8% emission reduction of metal etching waste liquid and 45% reduction in oxidant addition.

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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...

Claims

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Application Information

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IPC IPC(8): C23F1/46C25B1/26
CPCC23F1/46C25B1/26
Inventor 高源陈祥衡李明军石杨吴渤王青龙
Owner SHENZHEN ZHONGKE OUTAIHUA ENVIRONMENTAL PROTECTION TECH
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