Coal-fired power generation plant and coal-fired power generation method

摘要

[Problem] To provide a coal-fired power generation plant that not only recovers latent heat condensation from dry exhaust gas generated by drying facilities that dry coal in advance, but also is configured so that the amount of steam that flows in the final stage of a steam turbine does not materially differ from design values. [Solution] A coal-fired power generation plant comprising an indirect heat dryer (1) that has a heat medium flow channel in a housing and that indirectly heats coal brought into the housing using steam fed to the heat medium flow channel, thus drying the coal; a coal-firing boiler (3) that burns coal to generate steam; and a steam turbine (6) that generates power using the steam from the boiler (3). The boiler feedwater for the coal-firing boiler (3) is waste-heated using the extracted steam extracted from the steam turbine (6). The coal-fired power generation plant is provided with a system for using a portion of the extracted steam as the heating steam of the indirect heat dryer (1); a condenser (5) of the steam turbine (6); a wet scrubber (11) provided with a dry exhaust gas path from the indirect heat dryer (1); and heat recovery and heat exchange devices (22) (24) that perform heat exchange between the circulation water of the wet scrubber (11) and the condensation water of the condenser (5), wherein the condensation water that recovered the heat from the dry exhaust gas through the heat recovery and heat exchange devices (22) (24) is used to waste-heat the boiler feedwater.