Salt cleaning method as well as the steam turbine unit of the feedwater heater and feedwater heater

摘要

PROBLEM TO BE SOLVED: To provide a feed water heater and a salinity cleaning method of the feed water heater, capable of cleaning the feed water heater when seawater leak occurs, and provide a steam turbine unit.;SOLUTION: As a countermeasure of a case where seawater leak occurs, in a feed water heater 10A, a cleaning water line 32, which introduces cleaning water 31 in a trunk body 11 after stop of units, is provided. In the case of the stop of the units, a valve V₁ is opened and the cleaning water 31 is introduced into the trunk body 11. The cleaning water 31 is introduced until the water level of a steam drain 24 is increased to become a water level L₁ with a level meter 26, at which a heating tube 20 is covered.;COPYRIGHT: (C)2014,JPO&INPIT