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Method for recovering cupric ion from copper plating cleaning fluid

A cleaning solution and copper ion technology, applied in cells, electrolysis process, electrolysis components, etc., can solve the problems of difficult promotion of technology and economy, and achieve the effect of simple and economical method, large investment, and improved system failure rate.

Active Publication Date: 2009-04-29
NANJING YUANQUAN TECH CO LTD
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  • Description
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Problems solved by technology

[0004] The present invention aims at the current situation that the electroplating wastewater treatment reaches the standard and discharges the polluted environment, and the existing zero-discharge technology has many problems in terms of technology and economy and is difficult to popularize. Through repeated tests on the electroplating production line, continuous adjustment and improvement, and gradual exploration The obtained process method is simple, and can be directly applied to the general electroplating production line to achieve zero emission, a new process with less investment and strong practicability

Method used

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  • Method for recovering cupric ion from copper plating cleaning fluid
  • Method for recovering cupric ion from copper plating cleaning fluid

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Embodiment Construction

[0030] The present invention has been used on the plastic electroplating production line, and the copper ion content of this line copper-plating cleaning waste water is about 40-80g / T, and water flow is about 1-1.4T / h, works about 16 hours every day, after 5 days (1 working week ), obtain about 410 kilograms of concentrates with a copper ion content of about 14g / L from the concentrated water collection box, and its concentration factor is about 230 times. Concentrate again by chemical method, obtain 85 kilograms of concentrates containing copper ion about 66g / L. The conductivity of reused pure water is less than 15μS, which is higher than the standard for direct supply of raw water. Pure water and concentrated liquid are directly returned to the tank for use. The specific operation method is:

[0031] Pretreatment: Use a drum-type quartz sand filter and an activated carbon filter with a filtered sewage volume of 3T / h as the pre-filter device for a 5μ precision filter, and pa...

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Abstract

The invention discloses a method for recovering copper ions in copper-plating cleaning solution. The method comprises the following steps of filtration pretreatment, first-stage cyclic separation, second-stage cyclic separation and chemical concentration. The method which adopts a membrane cyclic separation technique plus a chemical concentration method realizes the decomposition, concentration and complete on-line recycling of electroplating waste liquid, realizes real zero emission, is very simple and economical, and solves the problem of the industrialization of an electroplating waste liquid treatment zero-emission technique from research experiments to practical application.

Description

technical field [0001] The invention belongs to the technical field of electroplating waste liquid treatment, and in particular relates to a method for recycling copper plating cleaning liquid waste water. Background technique [0002] At present, the treatment process of electroplating wastewater in electroplating enterprises is still designed according to the technology of "standard discharge". Taking the Nanjing area as an example, electroplating enterprises discharge about 10 tons of copper, nickel, chromium, zinc and other heavy metal ions into the water body every year according to the standard discharge, and the COD discharge is about 200 tons. In the past 10 years, various studies on the treatment of electroplating wastewater have continued, but they have not been able to thoroughly solve the pollution problem. Such as "Electroplating and Finishing" published in October 2003 "Electroplating Wastewater Treatment Station Overall Design Points" (Chu Rongbang et al.) an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D21/20
Inventor 沈德华
Owner NANJING YUANQUAN TECH CO LTD
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