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

摘要

According to one embodiment, a carbon-dioxide-recovery-type thermal power generation system includes an absorption column allows carbon dioxide contained in exhaust gas from a boiler to be absorbed in an absorption liquid, a regeneration column that discharges a carbon dioxide gas from the absorption liquid supplied from the absorption column, a reboiler that heats the absorption liquid discharged from the regeneration column and supplies steam generated, to the regeneration column, a condenser that generates condensate by cooling the steam exhausted from a turbine, a heater that heats the condensate, a water supply pump that supplies the condensate to the boiler, a line through the steam extracted from the turbine is supplied to the reboiler and the heater, and a steam flow rate adjusting unit. The steam flow rate adjusting unit maintains an amount of steam, which is extracted from the turbine through the line, to be constant.

主权项

1. A carbon-dioxide-recovery-type thermal power generation system comprising:
a boiler that produces steam and generates an exhaust gas by combusting fuel; an absorption column 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 column that is supplied with the absorption liquid containing the absorbed carbon dioxide from the absorption column, allowing a carbon dioxide gas to be discharged from the absorption liquid, and discharges the carbon dioxide gas; a reboiler that heats the absorption liquid discharged from the regeneration column and supplies steam generated thereby to the regeneration column; a turbine that is supplied with the steam from the boiler and is rotationally driven; a condenser that generates condensate by cooling the steam exhausted from the turbine; a condensate pump that sends the condensate to a first line; a first heater that is provided on the first line and heats the condensate; a water supply pump that supplies the condensate, which has been heated by the heater, to the boiler; a second line through which steam extracted from the turbine is supplied to the reboiler and the first heater; and a steam flow rate adjusting unit that maintains an amount of steam, which is extracted from the turbine through the second line, to be constant.