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

A carbon-dioxide-recovery-type steam power generation system, comprising:

• 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 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 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 the regeneration tower, by condensing the carbon dioxide gas using a cooling medium;
• a compressor that compresses the carbon dioxide gas from which the moisture is removed by the condenser;
• and
• a second turbine that drives the compressor,
• wherein steam produced by the cooling medium recovering the heat from the carbon dioxide gas in the condenser is supplied to the first turbine or the second turbine.

A carbon dioxide recovery method, comprising:

• producing steam, which drives a turbine, and generating an exhaust gas by combusting fuel;
• allowing carbon dioxide, which is contained in the exhaust gas, to be absorbed into an absorption liquid;
• emitting a carbon dioxide gas by heating the absorption liquid absorbing the carbon dioxide and discharging the carbon dioxide gas;
• cooling the discharged carbon dioxide gas using a cooling medium and removing moisture from the carbon dioxide gas by condensing the moisture;
• compressing the carbon dioxide gas, from which moisture is removed, using a compressor;
• and
• supplying steam generated by the cooling medium recovering heat at the time of condensing the moisture from the carbon dioxide gas to a driving turbine driving the compressor or the turbine.