| abstract |
An acidic gas recovery device and an acidic gas recovery method capable of efficiently suppressing the release of amine to the outside are provided. An acidic gas recovery apparatus 10A includes an acidic gas absorption unit 11a that exhausts exhaust gas 21 as a CO 2 removal exhaust gas 26a, a regeneration tower 12, and a gas cleaning unit 11b that cleans the CO 2 removal exhaust gas 26a with a water washing liquid 27. A cleaning liquid extraction line L23 for extracting a part of the water washing liquid 27b, an absorption liquid extraction line L21 for extracting the treated lean solution 23B, a water washing liquid 27c from the cleaning liquid extraction line L23, and a purified lean solution from the absorption liquid extraction line L21. And an acid component removing unit 13A to which 23C is supplied. The acid component removing unit 13A includes a cathode 53, an anode 54, an absorption liquid purification chamber 57 that removes the acid component from the to-be-processed lean solution 23B, and cleaning liquid chambers 58-1 and 58-2 to which the water washing liquid 27b is supplied. It comprises. [Selection] Figure 1 |