Patent ID: 8764890

Claim:
A dry carbon dioxide (CO 2 ) capturing device which includes at least two (a first and second) dry carbon dioxide (CO 2 ) capturing parts comprising: a first and second recovery reactors 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 first and second recovery cyclones connected to the recovery reactors to discharge a gas while separating the solid sorbent capturing CO 2 (‘CO 2 -captured solid sorbent’) only; a first and second regenerators connected to the recovery cyclones to receive the CO 2 -captured solid sorbent and separate CO 2 captured in the solid sorbent through a fluidized gas; and a first and second pre-treatment reactors connected to the regenerators through sorbent supply lines to cool the solid sorbent free from CO 2 and feedback the cooled solid sorbent to the recovery reactors, wherein the first and second dry carbon dioxide (CO 2 ) capturing parts are connected to each other so as to feed an isolated gas, which is separated with the solid sorbent in the first recovery cyclone of the first dry CO 2 capturing part, to the second dry CO 2 capturing part through the exhaust gas supply line, and different solid sorbents are used in the first and second CO 2 capturing parts.