Carbon dioxide recovery device and carbon dioxide recovery system

A carbon dioxide recovery device configured to:

• cause a carbon dioxide adsorbing material to adsorb carbon dioxide contained in a treatment target gas, the carbon dioxide adsorbing material being prepared by causing a porous substance to support an adsorbing liquid for adsorbing the carbon dioxide;
• separate the carbon dioxide adsorbed by the carbon dioxide adsorbing material;
• and
• causing the carbon dioxide adsorbing material or the porous substance to support the adsorbing liquid,
• the carbon dioxide recovery device comprising:
• a casing including
• a fluid treatment passage through which a fluid flows,
• one or two or more gas supply ports through which a gas is supplied to the fluid treatment passage, and
• one or two or more gas exhaust ports through which the gas supplied to the fluid treatment passage is discharged;
• a housing tank provided in the fluid treatment passage and configured to house the carbon dioxide adsorbing material;
• and
• an adsorbing liquid supplying portion configured to supply the adsorbing liquid to the housing tank, wherein
• a passage opening-closing mechanism configured to open or close the fluid treatment passage to discharge or store the adsorbing liquid supplied to the housing tank is provided at a bottom portion of the housing tank or under the housing tank.