Exhaust gas treatment system and exhaust gas treatment method

摘要

[Problem] The purpose of the present invention is to provide an exhaust gas treatment system and exhaust gas treatment method that can reduce the amount of make-up water to a desulfurization means and make a reduction in the heat source required for a desalination means. [Solution] This exhaust gas treatment system (10) is characterized by comprising a wet type desulfurization means (40) that eliminates sulfur oxides in the exhaust gas, a desalination means (80) that produces fresh water from seawater and supplies the same to the wet type desulfurization means (40), a heat exchanger (20) that heats a heating medium by means of the exhaust gas in a stage prior to the wet type desulfurization means (40), a seawater heater (22) for the desalination means (80), and a circulation line (24) that connects the heat exchanger (20) to the seawater heater and circulates the heating medium.