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Device and method for adsorbing, recovering and treating organic exhaust gas by aerogel

An organic waste gas, adsorption recovery technology, applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve problems such as the decline of organic solvents, achieve the effect of improving efficiency, uniform pore size distribution, and overcoming technical defects

Inactive Publication Date: 2012-03-21
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0005] The problem to be solved by the present invention is to use airgel as a new type of adsorbent to absorb, separate and recover volatile organic solvents from organic waste gas, so as to overcome the problem that the adsorbent is easy to absorb and saturate the moisture in the waste gas in the existing adsorption recovery process. The problem of the decline of the adsorption capacity of the solvent, improve the efficiency of the adsorption recovery process

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  • Device and method for adsorbing, recovering and treating organic exhaust gas by aerogel
  • Device and method for adsorbing, recovering and treating organic exhaust gas by aerogel
  • Device and method for adsorbing, recovering and treating organic exhaust gas by aerogel

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Embodiment 1

[0021] This embodiment provides an airgel adsorption recovery device and treatment method for organic waste gas.

[0022] The exhaust gas discharged from a tipping paper printing workshop is mainly composed of ethanol, ethyl acetate, hexanediol ethyl ether and air, etc. The exhaust air volume is 21000m 3 / h.

[0023] attached figure 1 It is the process flow diagram of embodiment 1. An airgel adsorption recycling device for treating organic waste gas comprises a waste gas delivery channel, a steam delivery channel, two adsorption tanks arranged in parallel, a switching valve, a condenser, a solvent recovery tank and a steam generator.

[0024] The adsorption tank 1 and the adsorption tank 2 are provided with an airgel adsorption layer.

[0025] The airgel used in this embodiment is silicon aerogel, which is chemically stable, resistant to acid and alkali, water, high temperature and high pressure. Silica airgel has the following advantages as an adsorbent: 1. Good flame ret...

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Abstract

The invention relates to a device and a method for adsorbing, recovering and treating organic exhaust gas by aerogel. The device comprises an exhaust gas conveying pipe, a steam conveying pipe, two or multiple adsorption tanks which are arranged in parallel, a transfer valve, a condenser, a solvent recovery tank and a steam generator. The two or multiple adsorption tanks are provided with aerogel adsorption layers. The aerogel is silica aerogel of which the surface is modified by trimethylsilyl chloride, and has absolute hydrophobicity. The method utilizes the aerogel to replace traditional adsorbents such as activated carbon particles or activated carbon fibers adopted in recovery of printing organic solvents such as methanol and the like, overcomes the problem that based on the existing adsorption and recovery method, in organic solvent adsorption, an organic solvent adsorption capability can be reduced because of exhaust gas moisture saturation adsorption, and improves adsorption and recovery process efficiency.

Description

technical field [0001] The invention relates to a method for recovering organic waste gas, in particular to an adsorption recovery treatment device and method for volatile organic waste gas in the production process of electronics, printing and coating. Background technique [0002] In the production of electronics, printing, coating and other industries, a large amount of volatile organic solvents are used to dissolve polymer resins. These organic solvents will all volatilize during the drying and film forming process, and then be discharged after being mixed with air. It is estimated that the country's major tipping paper printing manufacturers consume tens of thousands of tons of ethanol and other solvents every year, and discharge a large amount of harmful substances into the atmosphere every year, which not only causes environmental pollution, damages people's health, but also wastes resources. Therefore, these organic solvents are generally recycled in industry to achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01J20/28
Inventor 银凤翔
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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