Treatment process for absorbed condensate waste gas

Abstract

The invention provides a treatment process for absorbed condensate waste gas, wherein two active carbon absorbing tanks alternately absorb waste gas; when one active carbon absorbing tank carries out waste gas absorption work, the other active carbon absorbing tank carries out carbon bed reproduction work, wherein the absorbed waste gas in waste gas absorption work is cooled; the carbon bed reproduction work comprises a step of vacuum de-sorption and a step of nitrogen de-sorption in sequence; the step of nitrogen de-sorption comprises flowing heated nitrogen at the temperature of 60-80 DEG Cthrough the carbon bed from top to bottom so that the carbon bed is deeply desorbed, and finally cooling the carbon bed by using unheated cold nitrogen so as to recover adsorptive capacity. The process is simple without providing absorbent on the spot; and the treatment process has high treatment efficiency, and can obtain pure recovery product without causing secondary pollution.

Description

technical field [0001] The invention relates to a waste gas treatment process, in particular to an adsorption condensation waste gas treatment process. Background technique [0002] The traditional exhaust gas treatment process using the adsorption method mainly falls into the following two categories: when the concentration is high, the process route of "activated carbon adsorption, vacuum desorption, and absorbent absorption" is used; , Oil-water separation" process route. The disadvantage of the former technology is: the process of "gas phase change to liquid phase" needs to continuously provide fresh absorbent to absorb the condensed gas in the absorption tower. Generally, it is difficult to provide fresh absorbent continuously on site, and provide If the absorbent used is not the same as the recyclable components in the exhaust gas, the recyclable components will be mixed with the absorbent, and pure recycled products cannot be obtained, and further separation treatmen...

AI Technical Summary

Problems solved by technology

The disadvantage of the former technology is: the process of "gas phase change to liquid phase" needs to continuously provide fresh absorbent to absorb the condensed gas in the absorption tower. Generally, it is difficult to provide fresh absorbent continuously on site, and provide If the absorbent is not the same as the recyclable components in the exhaust gas, the recyclable components will be mixed with the absorbent, and a pure recycled product cannot be obtained, and further separation treatment is required

The disadvantage of the latter technology is: the method of desorbing the carbon bed with water vapor not only makes the desorption time very long and the process is very complicated, but also mixes the recyclable components with water. If the two are mutually soluble, It needs to be separated by distillation. If the two are not miscible, there will be secondary pollution when oil and water are separated.

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