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

摘要

According to one embodiment, a carbon-dioxide-recovery-type steam power generation system 5 comprises a boiler that produces steam and generates an exhaust gas by combusting fuel, a first turbine that is connected to a generator and is rotationally driven by the steam supplied from the boiler, an absorption tower that is supplied with the exhaust gas from the boiler and allows carbon dioxide contained 10 in the exhaust gas to be absorbed into an absorption liquid, a regeneration tower that is supplied with the absorption liquid absorbing the 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 15 absorption liquid from the regeneration tower and supplies the generated steam to the regeneration tower,. a condenser that removes moisture from the carbon dioxide gas, discharged from th-e regeneration tower, by condensing the carbon dioxide gas using cooling water, a compressor that compresses the carbon 20 dioxide gas from which the moisture is removed by the condenser, and a second turbine that drives the compressor. The steam produced by the cooling water recovering the heat from the carbon dioxide gas in the condenser is supplied to the first turbine or the second turbine.