Carbon dioxide recovery method and carbon-dioxide-recovery-type steam power generation system

摘要

According to one embodiment, carbon-dioxide-recovery-type steam power generation system 5 comprises a boiler that generates steam through the combustion of fuel and generates an exhaust gas, an absorption tower that is supplied with the exhaust gas from the boiler, and allows carbon dioxide contained in the exhaust gas to be absorbed in an absorption liquid, a regeneration tower that is supplied with the 10 absorption liquid having absorbed carbon dioxide from the absorption tower, discharges a carbon dioxide gas from the absorption liquid, and discharges the carbon dioxide gas, a reboiler that heats the absorption liquid discharged from the regeneration tower and supplies generated steam to the regeneration tower, a 15 turbine that is supplied with steam from the boiler and is rotationally driven, a first condenser, a second condenser, and a desuperheater. The first condenser generates condensate by cooling steam exhausted from the turbine. The second condenser is supplied with a part of the condensate as cooling water, 20 condenses the carbon dioxide gas, and generates hot water. The desuperheater is supplied with the hot water, lowers the temperature of the steam exhausted from the turbine by spraying the hot water on the steam, and supplies the steam of which the temperature is lowered to the reboiler. Tcr) co (0 Ln 0) LO co LO to Lo co LO Ln cq U) ulN L co co Lo