Adsorption recovery system for nitrogen regeneration and adsorption recovery method thereof

Abstract

The invention provides a nitrogen regeneration adsorption recovery system and an adsorption recovery method thereof, belonging to the field of adsorption recovery. The system includes exhaust gas input equipment, primary adsorption equipment and secondary adsorption equipment connected in sequence, and also includes a nitrogen replacement pipeline and a primary circulating nitrogen desorption pipeline respectively connected to the primary adsorption equipment and the secondary adsorption equipment. with the secondary circulating nitrogen desorption pipeline; the primary circulating nitrogen desorption pipeline and the secondary circulating nitrogen desorption pipeline are respectively connected with the nitrogen replacement pipeline; the primary circulating nitrogen desorption pipeline and the secondary circulating nitrogen desorption pipeline The desorption gas condensing and recovery equipment is also provided on the first-stage circulating nitrogen desorption pipeline; the first-stage adsorption device includes at least two parallel adsorption tanks, and the second-stage adsorption device is an adsorption runner. By adopting the system and method of the present application, the specification of the adsorption device can be significantly reduced, the filling amount of the adsorbent material can be greatly reduced, the switching period can be greatly shortened, the safety is high, and the energy consumption can be reduced.

Description

technical field [0001] The invention relates to the field of adsorption recovery, in particular to a nitrogen regeneration adsorption recovery system and an adsorption recovery method thereof. Background technique [0002] The high-concentration organic waste gas discharged from the coating, evaporation and drying processes in the printing industry, fiber industry, resin industry and other fields has high recovery value. In industry, activated carbon can be used for adsorption and recovery. For water-soluble solvents, hot nitrogen is used for most of them. The activated carbon is desorbed, and the desorption hot nitrogen containing the solvent is condensed and recovered by the condenser, but the saturated concentration of the exhaust gas after condensation is generally large. Relying on condensation alone will cause a large amount of high-concentration solvent to remain in the activated carbon canister. If the activated carbon canister is adsorbed again, it will be The resid...

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Problems solved by technology

In terms of process design, it is still unavoidable to avoid the problem that the equipment has a huge amount of activated carbon and the equipment is extremely large.

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