CO2 capture device and CO2 capture method

摘要

The CO 2 recovery device includes an absorption tower configured to allow a CO 2absorption liquid containing an absorbent to absorb CO 2 in the exhaust gas, and a regeneration tower for regenerating the CO 2 absorption liquid from the absorption tower.A recirculating water drum for separating the CO 2- containing gas released from the regenerating tower into CO 2 gas and condensed water, and the condensing water drum provided in the gas phase portion of the regenerating tower. A first cleaning unit configured to remove the absorbent contained in the CO 2- containing gas flowing through the gas phase portion with water or a first cleaning liquid containing at least water derived from the condensed water, and the said A control unit configured to adjust the supply amount of the first cleaning liquid to the first cleaning unit is provided so that the concentration of the absorbent in the condensed water is maintained at a specified value or less.