Treatment system and treatment process for electroplating copper-containing sewage

Abstract

The invention relates to the technical field of sewage treatment, specifically to a treatment system and a treatment process for electroplating copper-containing sewage. The treatment system comprisesa first filter tank, a first regulating tank and a first copper separation and extraction machine, wherein the first filter tank, the first regulating tank and the first copper separation and extraction machine are sequentially communicated through pipelines; the first copper separation and extraction machine is respectively communicated with a cyanide breaking pool and a back-extraction separator; the cyanide breaking pool is connected with a second copper separation and extraction machine; the second copper separation and extraction machine is also communicated with the back extraction separator; the back extraction separator is also connected with an electrolytic tank through a pipeline; and the second copper separation and extraction machine is sequentially communicated with a secondregulating tank, a second filtering tank, an adsorption tank and a water storage tank through pipelines. According to the invention, comprehensive removal of heavy metal ions is realized, copper ionsare recycled, and water capable of being directly recycled is obtained.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an electroplating copper-containing sewage treatment system and a treatment process. Background technique [0002] The copper plating layer is often used as the bottom layer of nickel plating, tin plating, chrome plating, silver plating, and gold plating to improve the bonding force between the base metal and the surface coating and the corrosion resistance of the coating. Therefore, copper-containing electroplating wastewater is very common in the electroplating industry. Moreover, the water quality of electroplating sewage is relatively complex. The sewage contains heavy metal ions such as chromium, zinc, copper, nickel, and cadmium, as well as highly toxic impurities such as acids, alkalis, and cyanides. It is difficult to treat and the environment is seriously polluted. [0003] A large amount of copper ions in copper-containing sewage exist in the form of copper-cya...

AI Technical Summary

Problems solved by technology

[0002] The copper plating layer is often used as the bottom layer of nickel plating, tin plating, chrome plating, silver plating, and gold plating to improve the bonding force between the base metal and the surface coating and the corrosion resistance of the coating. Therefore, copper-containing electroplating wastewater is very common in the electroplating industry. Moreover, the water quality of electroplating sewage is relatively complicated. The sewage contains heavy metal ions such as chromium, zinc, copper, nickel, and cadmium, as well as highly toxic impurities such as acids, alkalis, and cyanides. The treatment is difficult and the environment is seriously polluted.

[0003] A large amount of copper ions in copper-containing sewage exist in the form of copper-cyanide complex ions. In the treatment process of electroplating copper-containing sewage in the prior art, a large amount of OH is often added to the mixed solution - , not only corrodes the device, but also the removal of copper ions is not complete, resulting in the water after sewage treatment cannot be reused and needs to be treated again

Images