Organic waste gas recovery system and organic waste gas recovery method

Abstract

The invention discloses an organic waste gas recovery system, which comprises an alternate adsorption and desorption assembly, wherein the alternate adsorption and desorption assembly comprises a first adsorption bed and a second adsorption bed, the first adsorption bed is provided with a first steam coil pipe with a first steam inlet and a first steam outlet, the second adsorption bed is providedwith a second steam coil pipe with a second steam inlet and a second steam outlet, the first steam inlet is communicated with the output port of an external cooling water device through a first waterinlet pipe provided with a first water inlet control valve, the second steam inlet is communicated with the output port of the external cooling water device through a second water inlet pipe providedwith a second water inlet control valve, the first steam outlet is communicated with a first drainage pipe provided with a first drainage control valve, and the second steam outlet is communicated with a second drainage pipe provided with a second drainage control valve. The invention further discloses an organic waste gas recovery method using the organic waste gas recovery system. The system and the method have the advantages of high cooling efficiency in the desorption process, low operation cost and safety in use.

Description

technical field [0001] The invention relates to a waste gas recovery system and a waste gas recovery method, in particular to an organic waste gas recovery system and an organic waste gas recovery method. Background technique [0002] Most of the existing organic waste gas recovery technologies use activated carbon adsorption, and the steam is directly passed into the activated carbon adsorption bed to heat and analyze the activated carbon. Among them, two adsorption beds are generally set up to alternately perform adsorption and desorption; however, after the desorption process, in order to To avoid the welding seam of the adsorption bed being disengaged due to the large temperature difference, usually only the desorbed mixed gas is cooled through the cooler for heat exchange, and then circulated into the adsorption bed for cooling until the internal temperature of the adsorption bed drops to normal temperature, thereby switching To the adsorption mode, the cooling efficien...

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Problems solved by technology

[0002] Most of the existing organic waste gas recovery technologies use activated carbon adsorption, and the steam is directly passed into the activated carbon adsorption bed to heat and analyze the activated carbon. Among them, two adsorption beds are generally set up to alternately perform adsorption and desorption; however, after the desorption process, in order to To avoid the welding seam of the adsorption bed being disengaged due to the large temperature difference, usually only the desorbed mixed gas is cooled through the cooler for heat exchange, and then circulated into the adsorption bed for cooling until the internal temperature of the adsorption bed drops to normal temperature, thereby switching To the adsorption mode, the cooling efficiency of this cooling method is not high, and the time-consuming is too long, thereby increasing the operating cost; the adsorption bed will generate adsorption heat during the adsorption work, once the control is not good, there is a safety hazard that is easy to catch fire, the existing adsorption bed structure Since the cooling fan is often used to circulate and cool after the desorption work, the adsorption work and the cooling work cannot be carried out at the same time, so this problem cannot be solved well. Once the adsorption bed catches fire, it will bring greater economic losses to the user.

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