Condensate and feedwater system of steam power plant and operation method for the same
Number of patents in Portfolio can not be more than 2000
United States of America
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Apr 20, 2021
Grant Date -
Aug 27, 2020
app pub date -
Dec 11, 2019
filing date -
Dec 11, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A condensate and feedwater system includes: a deaerator circulation pump that returns condensate water flowing out from a deaerator to a part of a condensate line between a heater and the deaerator; an apparatus to be supplied with part of the condensate water flowing from the heater toward the deaerator, through a supply line branched from the condensate line; a supply line shutoff valve that switches between communication and interruption of the supply line; and a controller that controls opening/closing of the supply line shutoff valve and driving/stopping of the deaerator circulation pump. The controller closes the supply line shutoff valve from an open state at normal operation and at least temporarily drives the deaerator circulation pump from a stopped state at normal operation, in condenser throttling in which supply of extraction steam of a steam turbine to the heater and the deaerator is reduced as compared to that at normal operation and a deaerator water level control valve is closed.
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