The invention relates to a
coal-fired
power generation system deeply and integrally provided with a
system for desulfurizing and decarburizing a
calcium-based
sorbent in sequence. A heat source of a finishing
superheater and a heat source of a low-temperature reheater are replaced with heat discharged from a
carbide furnace, high-temperature
smoke of an outlet of a high-temperature reheater outlet of an original
standard system is cooled through a first
heat exchanger and then directly enters a
vulcanization reactor to be desulfurized, and CaSO4 is discharged; the heat discharged due to heat exchange of the first
heat exchanger and heat discharged from a reaction in a sulfuration reactor are used for heating a calcinator; and remaining CaO after desulfurizing is conducted and inactivated CaO discharged from the calcinator are recovered and enter a hydration reactor to be subjected to
hydrate activation and then enter a desulfurizing circulation, the desulfurized
smoke enters the
carbide furnace to be decarburized,
waste heat of the
smoke with lean CO2 of an outlet of the
carbide furnace is recovered through an
economizer and an
air preheater, partial heat discharged from the carbide furnace is provided to heat the
economizer and the
air preheater to maintain the design parameters of an original power
plant unchanged, the heat discharged from the hydration reactor and remaining heat after the
heat load is replaced with the carbide furnace are recovered by a
waste heat boiler module to be used for generating steam for acting.