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Chroming mist recycling method

A mist recovery and treatment method technology, which is applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of chromic acid loss, influence on the surrounding environment, pollution of the environment, etc., to save labor and increase pollution in the treatment process Effect

Active Publication Date: 2017-11-24
石家庄印钞有限公司
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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

Method used

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Embodiment Construction

[0026] The present invention is described in further detail below:

[0027] The invention provides a method for recovering and treating chromium-plating mist. The chromic acid mist in the chrome-plating tank is introduced from the air inlet of the first-level purification treatment unit through the fog-collecting cover, and then discharged from the bottom after being treated, and then discharged from the second-level after passing through the first-level liquid collection tank. The bottom of the purification treatment unit enters, the top is discharged, and enters the third-level purification treatment unit through the air duct. The treated waste gas enters from the bottom of the fourth-level purification treatment unit through the third-level liquid collection tank, and enters from the top of the fourth-level purification treatment unit. Discharge, and so on, can finally be safely discharged after reaching the standard.

[0028] like figure 1 As shown, the purification treat...

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Abstract

The invention discloses a chroming mist recycling method. A pure physical method is adopted for absorbing chroming mist generated in an electroplating production process into serially connected recycling treating units through a notch fan cover and then performing the processes of diffusing, colliding, coring, agglomerating and settling, so that the chroming mist is stopped and absorbed to the surfaces of a baffle plate and a filling material, and meanwhile, the chroming mist is intermittently and circularly flushed back to the present collecting tank, so that the chroming mist is intercepted, captured and recycled. No wastewater is discharged in the whole process, so that the purpose of environment-friendly emission of the chroming mist is achieved.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D47/04B01D53/00
CPCB01D47/04B01D53/002B01D53/14B01D2257/60
Inventor 解传东吴洪郛赵亮亮
Owner 石家庄印钞有限公司
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