Patent ID: 8852329

Claim:
A dry carbon dioxide (CO 2 ) capturing device with multistage supply structure, comprising: a recovery reactor to recover CO 2 by contacting a solid sorbent with exhaust gas, which is fed from outside through an exhaust gas supply line and contains CO 2 ; a recovery cyclone connected to the recovery reactor to discharge a gas while separating the solid sorbent capturing CO 2 (‘CO 2 -captured solid sorbent’) only; a regenerator connected to the recovery cyclone to receive the CO 2 -captured solid sorbent and separate CO 2 captured in the solid sorbent through a fluidized gas; and a pre-treatment reactor connected to the regenerator through a sorbent supply line to cool the solid sorbent free from CO 2 and feedback the cooled solid sorbent to the recovery reactor, wherein at least two exhaust gas supply lines are connected to the recovery reactor at different heights of the recovery reactor, and at least two sorbent supply lines are connected to the recovery reactor at different heights of the recovery reactor.