| 摘要 |
PROBLEM TO BE SOLVED: to provide a carbon dioxide capturing apparatus, a carbon dioxide capturing method, and an amine compound capturing method which suppress amine scattered to the atmosphere and which enable treatment gas entrained amine to be efficiently captured in an amine absorbing liquid and reused. SOLUTION: In accordance with an embodiment, a carbon dioxide capturing apparatus includes a first absorbing unit, a regeneration unit, a water washing capturing unit, and a pre-amine capturing unit. The first absorbing unit brings a gas containing carbon dioxide into contact with an absorbing liquid containing an amine compound in such a manner that the absorbing liquid absorbs carbon dioxide, and discharges the absorbing liquid which has absorbed carbon dioxide as a rich liquid. The regeneration unit releases a carbon dioxide gas from the rich liquid sent from the first absorbing unit, thereby regenerating the absorbing liquid. The water washing capturing unit captures the amine compound entrained in a decarbonated treatment gas sent from the first absorbing unit. The pre-amine capturing unit is provided between the first absorbing unit and the water washing capturing unit, receives part of the rich liquid from the first absorbing unit, and traps the amine compound entrained in the decarbonated treatment gas by bringing the decarbonated treatment gas from the first absorbing unit into countercurrent contact with the part of the rich liquid. |
