Patent ID: 8647421

Claim:
A CO 2 recovery apparatus comprising: a CO 2 absorber for bringing a CO 2 containing gas and a CO 2 absorbent into contact with each other so as to reduce CO 2 and release CO 2 reduced gas; an absorbent regenerator for allowing a CO 2 absorbed rich solution to be regenerated in a regenerative superheater and outputting a CO 2 accompanying gas that accompanies water vapor; wherein a lean solution with CO 2 reduced in the absorbent regenerator is recycled in the CO 2 absorber as the CO 2 absorbent; a cleansing section disposed downstream of a gas flow in the CO 2 absorber, for bringing the CO 2 reduced gas and a cleansing solution into contact with each other; a reflux line for condensing the water vapor accompanied by the CO 2 accompanying gas so as to return the condensed water as reflux water to the absorbent regenerator; a supplying line for adding a part of the reflux water to the cleansing solution; a first heat exchanger disposed in a boiler flue gas duct, for extracting a part of the cleansing solution so as to exchange heat with the part of the cleansing solution; and a superheated cleansing solution supply line for introducing the superheated cleansing solution that has heat exchanged in the heat exchange section into a bottom portion of the absorbent regenerator.