APPARATUS FOR RECOVERING CO2 AND METHOD THEREFOR

摘要

A CO 2 recovery unit 10A according to a first embodiment has a CO 2 absorber that removes CO 2 in flue gas by bringing the flue gas containing CO 2 into contact with a CO 2 absorbent 12, and a regenerator 15 that diffuses CO 2 in a rich solution 14 having absorbed CO 2 in the CO 2 absorber. The CO 2 recovery unit 10A includes a first compressor 29-1 to a fourth compressor 29-4 that compress CO 2 gas 16 discharged from the regenerator 15, a dehydrating column 33 that reduces moisture in the CO 2 gas 16 by bringing the CO 2 gas 16 into contact with a dehydrating agent 32, a combustion removal unit 41 that removes the dehydrating agent 32 mixed in the CO 2 gas 16 in the dehydrating column 33, and a heat exchanger 42 that performs heat exchange between the CO 2 gas 16 discharged from the third compressor 29-3 and the CO 2 gas 16 discharged from the dehydrating column 33.