CO2 recovery device

A CO2 recovery device comprising:

• a cooling tower into which an exhaust gas containing carbon dioxide is introduced to cool the exhaust gas;
• and
• an absorption tower into which the exhaust gas cooled in the cooling tower is introduced and which brings the exhaust gas into contact with an absorption liquid to remove the carbon dioxide from the exhaust gas, wherein
• the absorption tower comprises:
• an absorption tower body through which the exhaust gas is flowable and which has a tubular shape;
• and
• a demister that is disposed inside the absorption tower body and is configured to remove mist contained in the exhaust gas as the exhaust gas flows therethrough,
• the CO2 recovery device further comprises a flow velocity regulating section that is configured to regulate a flow velocity of the exhaust gas flowing through the demister to be within a predetermined range, and
• the flow velocity regulating section comprises:
• a differential pressure acquisition unit that acquires information on a differential pressure between a position upstream of the demister and a position downstream of the demister in a flow direction of the exhaust gas in the absorption tower;
• and
• a control unit configured to control the differential pressure acquired by the differential pressure acquisition unit by controlling the flow velocity such that:
• the differential pressure is increased in response to decrease of the differential pressure, and
• the differential pressure is decreased in response to increase of the differential pressure.