ABSORPTION DEVICE OF CARBON DIOXIDE GAS IN EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To prevent the structure of a regeneration tower in an absorption tower of carbon dioxide gas from becoming complicated and to reduce heat consumption of the regeneration tower. SOLUTION: The packed bed of a regeneration part in a regeneration tower is divided into at least two steps of the upper step 42 of the regeneration part and the lower step 43 of the regeneration part in the direction of height. A carbon dioxide gas-rich absorption liquid line 4 is branched into the upper step carbon dioxide gas-rich absorption liquid line 40 and the lower step carbon dioxide gas-rich absorption liquid line 41. Means are provided by which carbon dioxide gas-rich absorption liquid is supplied from the line 40 to the upper step 42 and supplied from the line 41 to the lower step 43. Further, means are provided by which absorption liquid is drawn out from the lower part of the upper step 42 and steam is directly introduced into the lower part of the upper step 42 from a reboiler 3.