A kind of chrome-plating mist recovery treatment method

Abstract

The invention discloses a method for recovering and treating chromium-plating mist. The chromic acid mist generated in the electroplating production process is sucked step by step into series-connected recovery and treatment units through a notch wind cover through a purely physical method. , sedimentation and other processes, which are intercepted and adsorbed on the surface of the barrier plate and filling material, and recycled to the recovery tank of the same level after intermittent and circular washing, so as to achieve the interception, capture and recycling of chromic acid mist, and realize chrome plating without wastewater discharge in the whole process Exhaust gas meets the purpose of environmental protection emission.

Description

technical field [0001] The invention relates to a method for recovering and treating chrome-plating mist, and belongs to the technical field of recovery and treatment processes for chrome-plating waste gas. Background technique [0002] Chromium plating is one of the most widely used plating types in the electroplating industry. Chromium plating can endow metal materials with excellent corrosion resistance, wear resistance and low friction coefficient. Functional chrome plating can make the surface of the material more bright, hard, anti-tarnish and wear-resistant and corrosion-resistant. Therefore, electrochrome plating, as a surface treatment technology, has been widely used in hardware, electromechanical, automotive and aerospace Protection of the surface of key mechanical parts and other industries. [0003] In electroplating production, when a large amount of hydrogen gas generated on the cathode escapes, chromic acid will be brought out with a small profit, thus form...

AI Technical Summary

Problems solved by technology

The release of chromium mist will cause the loss of chromic acid up to about 30%, and seriously pollute the environment

At present, the treatment method for chromium mist is to directly lead the outlet of the exhaust duct into the water tank, so that the chromium mist from the chrome plating workshop can be dissolved in water. There will also be waste gas discharged into the air, affecting the surrounding environment; in addition, the wastewater that dissolves the chromium mist needs to be treated

Another method is to recycle the chromium mist. The chromium mist recovery period filled with plastic grid balls is used to collect the chromium mist. The chromium mist recovery device has the following problems: 1. The chromium mist recovery device only uses fixed filled plastic Grid balls are used to realize the recycling of chromium mist. If the time is long, the chromium mist will scale on the plastic grid balls and gradually block the small holes of the plastic grid balls, resulting in increased wind resistance and poor treatment effect; 2. Chromium mist The collector is difficult to maintain and difficult to operate and maintain

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