CO2 RECOVERY DEVICE

摘要

In the present invention, an absorption liquid reproduction column (15) is divided at least into two. The present invention is equipped with: a rich solution supply line (L1) for supplying a rich solution (14) to the absorption liquid reproduction column (15) from a CO2 absorption column (13); a lean solution supply line (L2) for supplying a lean solution (16) to the CO2 absorption column (13) from the absorption liquid reproduction column (15); a lean-rich solution heat exchanger (17) which is disposed at an intersecting part between the lean solution supply line (L2) and the rich solution supply line (L1) and which exchanges the heat between the lean solution (16) and the rich solution (14); a branching part (18) which branches the rich solution supply line (L1) at the rear-flow side of the lean-rich solution heat exchanger (17) so that a portion (14a) of the rich solution (14) becomes separated; and a first mixing unit (20a) for mixing the portion (14a) of the rich solution (14) that separated at the branching part (18) with a semi-lean solution (19) which is obtained by removing a portion of CO2 from the rich solution (14) at the absorption liquid reproduction column (15).