Carbon dioxide recovery device

Abstract

Provided is a carbon dioxide recovery device which is capable of reducing energy required for reducing the internal pressure of a reactor in a desorption step and in which the energy efficiency is high. A carbon dioxide recovery device 1 comprises: a vacuum pump 62 that causes suction to act on reactors 11 which carry out a desorption step, to bring the insides of the reactors to a reduced-pressure state; a communication line 40 that is configured to allow gas to flow therethrough and that is capable of communicating the inside of a first reactor 11A with the inside of another second reactor 11B, which is different from the first reactor 11A; a communication valve 41 that is disposed along the communication line 40 and that opens and closes the route of the communication line 40; and a control device 90 that performs communication control for communicating the inside of the second reactor 11B, which is to be subjected to pressure reduction for carrying out the desorption step via the communication line 40 by controlling the communication valve 41 in an open state, with the inside of the other first reactor 11A, which is in the reduced-pressure state.

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