GAS TREATMENT DEVICE AND GAS TREATMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a gas treatment device capable of performing high-efficiency treatment of object gas by reducing excessive consumption of absorption capacity of an absorbent and to provide a gas treatment method using the gas treatment device.SOLUTION: A gas treatment device 100 comprises: a treatment tank 20 which has an absorbent 21 capable of absorbing organic solvent and is alternately supplied with object gas containing the organic solvent and desorbing steam to desorb the organic solvent from the absorbent; an object gas supply line 26 which is connected to the treatment tank 20 and supplies the same with the object gas; a condenser 51 and a separator 52 which have gas phase sections communicated with the object gas supply line 26 and collect the organic solvent from desorbed gas desorbing the organic solvent in the treatment tank 20; and valves 42 and 44 which selectively guide gas exhausted from the treatment tank 20 supplied with the desorbing steam to either the condenser 51, the separator 52 or the object gas supply line 26.