The invention provides a power generating
system utilizing circulating cooling water to heat raw
coal. Raw
coal in a
coal field enters a coal cabin after being heated and unfrozen by a heat exchangerarranged under the ground of the
coal field, and then the raw coal is fed into a coal mill through a coal feeder so as to be pulverized; qualified pulverized coal is carried into a boiler through primary air so as to be burned; exhausted steam of a
steam turbine enters a steam condenser to release heat, then the exhausted steam is fed into a low-pressure heater through a condensate water pump, isheated and then enters a
deaerator, generated steam is fed into a high-pressure heater through a
feed pump and then enters the boiler to absorb heat, steam with the corresponding parameters returns tothe
steam turbine to act, and the
steam turbine drives a power generator to generate power; and exhausted steam of the steam
turbine exchanges heat with circulating cooling water in the steam condenser, part of heated circulating cooling water is fed into a raw coal heater through a water pump, after raw coal heating, the part of heated circulating cooling water is converged with the other part of circulating cooling water which passes through a circulating water pump and then fed into a
cooling tower to be cooled, and cooled circulating cooling water is fed into the steam condenser again toachieve circulation. The power generating
system has important significance to efficient utilization of a thermal power generation unit which fires high-
moisture coal.