Patent ID: 8398757

Claim:
A CO 2 recovering apparatus comprising: a CO 2 absorber that brings flue gas containing CO 2 and O 2 into contact with CO 2 absorbing liquid to reduce CO 2 in the flue gas, including a CO 2 recovering part; a regenerator that reduces CO 2 in rich solvent that absorbed CO 2 in the CO 2 absorber to regenerate the CO 2 absorbing liquid, so that lean solvent having CO 2 reduced in the regenerator is reused in the CO 2 absorber, wherein a lower liquid reservoir is located below the CO 2 recovering part of the CO 2 absorber, an air-bubble gathering member is located in the lower liquid reservoir of the CO 2 absorber to gather air bubbles included in the CO 2 absorbing liquid falling down into the lower liquid reservoir, the air bubbles containing oxygen, and the air-bubble gathering member is arranged so as to be dipped near or below a liquid surface of the lower liquid reservoir.