DISCHARGE GAS TREATMENT SYSTEM

摘要

A discharge-gas treatment system which includes: a C02 absorption tower (32) in which an introduced combustion discharge gas (11) is brought into countercurrent contact with an amine-based absorption liquid serving as a C02-absorbing liquid, thereby removing CO2; and an absorption-liquid regeneration tower (33) in which the CO2 absorbed in the amine-based absorption liquid is released therefrom to regenerate the amine-based absorption liquid. The lean solution (3 lb) resulting from the removal of CO2 in the absorption-liquid regeneration tower (33) is supplied to the CO2 absorption tower (32) and reutilized as an amine-based absorption liquid (lean solution (3 1b)). The CO2 absorption tower (32) is equipped with: a CO2 absorption part (34) in which the CO2 contained in the combustion discharge gas (11) is absorbed by the amine-based absorption liquid (lean solution (1b)); and a water-repellent filter part (36) which has been disposed on the upper (gas -flow downstream) side o f the CO2 absorption part (34) and which collects the misty amine-based absorption liquid that has accompanied the C02-free discharge gas (12A). The misty amine that has accompanied the CO2-free discharge gas (12A) is collected.