CARBON DIOXIDE COLLECTION DEVICE AND METHOD FOR OPERATING SAID COLLECTION DEVICE

摘要

[Problem] In a carbon dioxide collection device and an operation method therefor, to simultaneously achieve an increase in absorption liquid temperature by heating absorption liquid that is being transported from a regeneration column to an absorption column and a reduction of the volume of steam supplied to the regeneration column without changing the conditions for steam supply. [Solution] Primary hot water (35) from a reboiler (21) of the regeneration column (8) is flashed to generate a flashed steam (39); the flashed steam is compressed to generate a VR steam (38) and is supplied to the reboiler; and post-flashing secondary hot water (37) is used as a heat source for heating a rich absorption liquid (9) that is transported to the regeneration column. When doing so, a VR absorption liquid steam (41) obtained by flashing a lean absorption liquid (10) that is transported from the regeneration column to the absorption column (7) can be pressurized and supplied to the regeneration column.