SUBCRITICAL PRESSURE HIGH TEMPERATURE THERMAL POWER PLANT AND SUBCRITICAL PRESSURE HIGH TEMPERATURE VARIABLE PRESSURE OPERATION ONCE-THROUGH BOILER

摘要

The preset invention provides a boiler used for a thermal power plant and a thermal power plant, of which power generation output has small capacity (power generation output of a short-lived power generation device is 10 million kW tertiary to 40 million kW tertiary). Moreover, the thermal power plant is capable of effectively improving efficiency. A condition of steam generated in the boiler and supplied to a steam turbine has subcritical pressure and high temperature (at least 593 deg. C of temperature of a turbine entrance). For example, the subcritical pressure high temperature thermal power plant comprises: a combustion boiler facility; a steam turbine power generation facility; and a condensate supply facility. A boiler facility comprises: a pulverized coal feeder; a burner; a brazier; a spiral water wall; a coal cutter; a high-temperature super heater; a high-temperature reheater; and a cyclone steam separator. Moreover, a tilt angle of the spiral water wall is set to be 10 to 20 degrees.