Novel organic waste gas recovery method and system

Abstract

The invention relates to a novel organic waste gas recovery method and a novel organic waste gas recovery system, which belong to the field of environmental protection. By the organic waste gas recovery method utilizing activated carbon fibers and utilizing nitrogen gas as a desorption medium, organic waste gas and nitrogen gas can be recovered and reutilized simultaneously by the aid of a fixed-bed adsorber through hot nitrogen gas desorption, wherein the fixed-bed adsorber utilizes activated carbon fibers as adsorbent. Due to hot nitrogen gas desorption, secondary pollutant can be avoided, environment-friendly emission reaching the standards can be realized, an adsorption layer is kept dry, the utilization rate of the activated carbon fibers is increased, and the service life of the activated carbon fibers is prolonged. Since water vapor desorption is omitted, corrosion of equipment is avoided and manufacturing cost of equipment is reduced greatly. In addition, the novel organic waste gas recovery method has excellent effect on recovering solvent with high water solubility or easy to be hydrolyzed and organic waste gas with high boiling point, products recovered by the method is low in water content, solvent quality is high, and operating cost can be reduced.

Description

technical field [0001] The invention relates to the field of environmental protection, recovers high-boiling point gaseous compounds such as liquid compounds from gaseous mixtures, and particularly relates to organic waste gas produced in the production process of printing, light industry, coating, chemical industry, electronics and other industries. A method for recovering various organic waste gases and recycling them. Background technique [0002] Activated carbon fiber (ACF), also known as fibrous activated carbon, is an efficient active adsorption material and an environmental protection engineering material with better performance than activated carbon. More than 50% of its carbon atoms are located on the inner and outer surfaces, forming a unique adsorption structure, which is called a surface solid. It is formed by carbonization and activation of fibrous precursors through certain procedures. The more developed specific surface area and narrow pore size distributi...

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Problems solved by technology

[0006] (3) When the working condition is poor, impurities such as dust entrained in the airflow will accumulate in the activated carbon fiber, and the activated carbon fiber loses its activity under the effects of salting out, filling, etc.

[0007] (4) For some occasions containing high boiling point substances, since the water vapor cannot be effectively desorbed, the adsorption rate of the above-mentioned process and device will drop a lot after a period of operation, and cannot operate normally

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