| 摘要 |
Provided is a carbon dioxide recovery method and recovery device able to reduce operating cost by reducing energy necessary for regeneration of an absorbing solution. The carbon dioxide recovery device has an absorption tower for absorbing carbon dioxide included in a gas into the absorbing solution, a regeneration tower for regeneration by heating the absorbing solution and discharging the carbon dioxide, and a circulation system for circulating the absorbing solution. The absorbing tower has a first absorbing unit and a second absorbing unit, and gas is supplied to the second absorbing unit through the first absorbing unit. The regeneration tower has a first regeneration unit and a second regeneration unit, the first regeneration unit has an external heating means, and the second regeneration unit is heated by the heat of the gas discharged from the first regeneration unit. The circulation system has a first circulation path for circulating absorbing solution between the first absorption unit and the second regeneration unit and a second circulation path for circulating absorbing solution between the second absorption unit and the first regeneration unit, and circulates the absorbing solutions separately. |
