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Electric chromium plating waste gas purification system and method

An exhaust gas purification system and electrochrome plating technology, applied in the electrolysis process, electrolysis components, cells, etc., can solve problems such as chromic acid exhaust gas pollution, and achieve the effect of improving condensation efficiency

Active Publication Date: 2015-07-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The object of the present invention is to propose a chromium electroplating waste gas purification system and method that can reduce the air pollution caused by chromic acid in view of the pollution of chromic acid waste gas in the electroplating process

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  • Electric chromium plating waste gas purification system and method
  • Electric chromium plating waste gas purification system and method

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Embodiment Construction

[0015] A chromium electroplating exhaust gas purification system, as shown in Figure 1, the system includes: electroplating unit 1, liquid storage tank 2, electroplating solution circulation system 3, chromic acid condensation cover 4, electroplating solution heating system 5, gas collection system 6, Connecting flange 7, metal foam 8, condensation pipe 9, box body 10, porous titanium foam 11, chromic acid waste gas 12, recovered and purified gas 13, recovered and purified gas. It is characterized by the chromic acid purification system, the chromic acid waste gas is recycled into the electroplating unit 1 through the cooling and purification of the porous titanium foam 11 and the condensation pipe 9, and the rest of the gas is discharged into the atmosphere through the gas collection system.

[0016] The chromic acid condensation cover box and connecting flange are made of chromic acid corrosion-resistant polyethylene or polyvinyl chloride plastic, the condensation pipe is mad...

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Abstract

The invention relates to an electric chromium plating waste gas purification system and a method and belongs to the technical field of electroplating. The system comprises a condensation cover (4) mounted above an electroplating unit (1) via a coupling flange (7) and forming a sealed channel, wherein the condensation cover (4) is internally equipped with a plurality of layers of foam metals (8) and a condensation tube (9); the foam metals are distributed in a layered manner sequentially according to a gap size; a gap diameter of a lower layer is greater than that of an upper layer; the condensation tube (9) is arranged in the foam metals (8); and the system further comprises a gas collecting system connected with the upper end of the condensation cover (4). The system can effectively purify and recover volatile chromic acid generated in an electric chromium plating process and discharges waste gas containing electric chromium plating acid after purification.

Description

technical field [0001] The invention relates to a novel electroplating waste gas purification system and method, belonging to the technical field of electroplating. 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 The protection of the surface of key mechanical parts and other industries. [0003] For a long time, the chromium plating process is a hexavalent chromium electroplating process using chromic acid as the chromium source. During chrome plating, the tank temperature needs to be heated,...

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Application Information

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IPC IPC(8): C25D21/04C25D21/18C25D3/04
Inventor 朱增伟王淑振曲宁松王栋梁
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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