Steam turbine facility and method of operating the same

摘要

In one embodiment, a steam turbine facility includes drain piping in which a shut-off valve is provided, the drain piping being either a valve drain pipe that leads a drain from the main steam regulating valve to an outside thereof, or a casing drain pipe that leads a drain from the turbine casing to an outside thereof. A heat absorber disposed in a range, upstream of the shut-off valve, of the drain piping to absorb heat of the drain piping.

主权项

1. A steam turbine facility, comprising:
a steam turbine including a turbine casing; main steam piping that supplies steam from a boiler to the steam turbine; a main steam regulating valve provided in the main steam piping to adjust a flow rate of steam supplied to the steam turbine; drain piping provided to discharge a drain produced during warming-up of the steam turbine, the drain piping being either a valve drain pipe that leads a drain from the main steam regulating valve to an outside thereof, or a casing drain pipe that leads a drain from the turbine casing to an outside thereof; a shut-off valve, disposed on the drain piping, that opens when the warming-up is being performed and closes after completion of the warming-up; and a heat absorber disposed in a range, upstream of the shut-off valve, of the drain piping to absorb heat of the drain piping when abnormal overheating of the drain piping occurs under a condition that the shut-off valve is closed after completion of the warming-up of the steam turbine.