Carbon-dioxide-recovery-type thermal power generation system and method of operating the same

A method of operating a carbon-dioxide-recovery-type thermal power generation system, the method comprising:

• generating steam, which drives a turbine, and generating an exhaust gas with a boiler;
• allowing carbon dioxide, which is contained in the exhaust gas discharged from the boiler, to be absorbed in an absorption liquid in an absorption column;
• allowing a carbon dioxide gas to be discharged from an absorption liquid containing the absorbed carbon dioxide in a regeneration column and discharging the carbon dioxide gas from the regeneration column;
• heating the absorption liquid discharged from the regeneration column with a reboiler and supplying the steam regenerated to the regeneration column;
• generating condensate by cooling steam, which is exhausted from the turbine, with a condenser;
• heating the condensate with a heater;
• supplying the heated condensate to the boiler with a pump;
• extracting a constant amount of steam from the turbine;
• and
• supplying the steam, which is extracted from the turbine, to at least one of the heater and the reboiler,
• wherein the constant amount of steam is extracted from at least one of a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine that form the turbine.

A method of operating a carbon-dioxide-recovery-type thermal power generation system, the method comprising:

• generating steam, which drives a turbine, and generating an exhaust gas with a boiler;
• allowing carbon dioxide, which is contained in the exhaust gas discharged from the boiler, to be absorbed in an absorption liquid in an absorption column;
• allowing a carbon dioxide gas to be discharged from an absorption liquid containing the absorbed carbon dioxide, in a regeneration column and discharging the carbon dioxide gas from the regeneration column;
• heating the absorption liquid discharged from the regeneration column with a reboiler and supplying the steam regenerated to the regeneration column;
• generating condensate by cooling steam, which is exhausted from the turbine, with a condenser;
• heating the condensate with a heater;
• supplying the heated condensate to the boiler with a pump;
• extracting a constant amount of steam from the turbine;
• supplying the steam, which is extracted from the turbine, to at least one of the heater and the reboiler;
• measuring a flow rate of the steam that is extracted from the turbine;
• and
• controlling an opening degree of valves, which are provided on pipes through which steam flows, the pipes being connected between the turbine and the heater, and between the turbine and the reboiler, based on a measurement result of the flow rate.