METHOD FOR RECOVERING CARBON DIOXIDE FROM CARBON DIOXIDE DRY WASHING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a method for recovering CO2 from a CO2 dry washing apparatus, capable of recovering CO2 in exhaust gas to reutilize the same. SOLUTION: In the method for recovering CO2 from the exhaust gas 6 of the CO2 dry washing apparatus 1, the exhaust gas 6 of the CO2 dry washing apparatus 1 is stored in a crude gas drum 2 and subsequently introduced into a PSA apparatus 3 and a part of CO2 recovered as purge gas in a desorbing process is used and the outflow gas in an adsorbing process or dehumidified nitrogen or air is used as pressure raising gas and this pressure raising gas is introduced from a direction reverse to the gas flow direction in the adsorbing process to repeat a PSA method. Obtained CO2 is compressed and cooled to be recovered as liquid CO2 and a part thereof is depressurized to be recycled to the crude gas drum.