Patent ID: 8663363

Claim:
A CO 2 recovering apparatus including a CO 2 absorber that brings flue gas containing CO 2 into contact with CO 2 absorbent to reduce CO 2 contained in the flue gas, and a regenerator that reduces CO 2 contained in rich solvent having absorbed CO 2 in the CO 2 absorber to regenerate the rich solvent, so that the CO 2 absorbent that is lean solvent having CO 2 reduced in the regenerator is reused in the CO 2 absorber, the CO 2 recovering apparatus comprising: a controller that controls to detect an absorbent concentration in the CO 2 absorbent, to increase or decrease a volume of the CO 2 absorbent to be circulated based on a decrease or an increase in the absorbent concentration, and to adjust a volume of steam to be supplied in the regenerator based on the volume of the CO 2 absorbent to be circulated, wherein the controller controls to detect a temperature of gas guided into the CO 2 absorber, to decrease or increase a circulation rate of the CO 2 absorbent based on a change in a detected temperature; and to adjust the volume of steam to be supplied in the regenerator based on the volume of the CO 2 absorbent to be circulated.