| 摘要 |
Exhaust gas (2), which has been pressurized and cooled by a compressor impurity separation mechanism (100) and had impurities removed, is further cooled by a refrigerator-type heat exchanger (9). Condensation (D4) caused by the cooling in the refrigerator-type heat exchanger (9) is ejected, and the condensation (D4) is supplied to the upstream side of an after-cooler (5a) of at least the foremost stage of an impurity separation device (6a) as an alkalinity control agent (10). |
