EXHAUST GAS TREATMENT SYSTEM AND EXHAUST GAS TREATMENT METHOD

摘要

Combining a desulfurization unit and a fresh water generator that is based on membrane treatment can reduce costs. A gas cooler (11) operates as a heat exchanger that cools exhaust gas (1) that flows into an absorption column (12) using treatment water (21) (treated sea water 20)and also heats the treatment water (21) using the heat of the exhaust gas (1). The water content of the exhaust gas (1) is condensed by gas cooling and fed to the absorption column (12) and the water content of the exhaust gas (1) emitted to outside the system is reduced. Consequently, the amount of water that must be replenished is reduced, the amount of fresh water generated is reduced, and energy consumption is reduced. The increase in the water temperature by the heating of the treatment water (21) is accompanied by a reduction in energy consumption during fresh water production. As a result, the operating cost can be reduced.