| 摘要 |
PROBLEM TO BE SOLVED: To prevent water hammering of a deaerator in time of rapid reduction or the like of a plant load without providing a deaerator circulation pump. SOLUTION: When boiler feed water pumps 10-13 feeding condensed water deaerated by the deaerator 4 to a boiler are stopped when a pressure regulating valve 7 for auxiliary steam is opened, an automatic opening/closing valve 14 of a condensed water return pipe 15 is opened to return the condensed water inside the deaerator to a condenser 1 to supply the low-temperature condensed water to the deaerator 4 through a deaerator water level adjustment valve 2, heat exchange with superheated steam filling inside the deaerator is made to be performed, and pressure inside the deaerator is stabilized to prevent generation of the water hammering. COPYRIGHT: (C)2006,JPO&NCIPI
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