Patent ID: 8753437

Claim:
A dry carbon dioxide (CO 2 ) capturing device, comprising: a recovery reactor to recover CO 2 by contacting a solid sorbent with exhaust gas, which is fed from outside 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 to cool the solid sorbent free from CO 2 and feedback the cooled solid sorbent to the recovery reactor, wherein a first heat exchanger is provided between the recovery cyclone and the regenerator to pass the CO 2 -captured solid sorbent therethrough, and a second heat exchanger is provided between the pre-treatment reactor and the regenerator to pass the solid sorbent free from CO 2 therethrough, and wherein the first and second heat exchanger include a first and second heat exchange jacket mounted thereon, respectively, which are connected to each other through a loop pipe to form a closed loop enabling a heat transfer medium to flow therein.