CO2 recovering method

摘要

A CO 2 recovering apparatus includes: a CO 2 absorber (16) that brings flue gas containing CO 2 into contact with CO 2 absorbent to reduce the CO 2 contained in the flue gas; a regenerator (18) that reduces CO 2 contained in rich solvent that has absorbed CO 2 in the CO 2 absorber (16) to regenerate the rich solvent, so that the CO 2 absorbent that is lean solvent having CO 2 reduced in the regenerator (18) is reused in the CO 2 absorber (16); and a controller that controls to detect the absorbent concentration in the CO 2 absorbent, to increase the volume of CO 2 absorbent to be circulated based on a decrease in the absorbent concentration, and to adjust the volume of steam to be supplied in the regenerator (18) based on the volume of the CO 2 absorbent to be circulated.