Method of and apparatus for warming high-pressure feed water heaters for power plants

摘要

A method of and apparatus for warming high-pressure feed water heaters for power plants provided with a boiler having a circulation system, in which a part of high-temperature water flowing in the circulation system is separated therefrom to introduce the resulting feed water into a high- pressure feed water heater from the portion of a feed water system which is on the side of an inlet portion thereof, with the feed water flowing out from the heater returned to the boiler, during a period of time which is between an instant, at which the boiler is ignited, and an instant, at which the heater is put in service, the heater being thereby warmed, a flow rate of the feed water introduced from the boiler to the heater being controlled in accordance with the temperature of the feed water flowing down in the same heater, whereby the occurrence of an excessively high thermal stress in the heater can be prevented when the heater is put in service.