专利名称：Power plant feedwater system发明人：George Silvestri, Jr.申请号：US06/507608申请日：19830624公开号：US04561255A公开日：19851231
摘要：A feedwater heater system for a steam turbine power plant is provided whichincorporates a liquid-to-liquid heat exchanger in addition to a plurality of vapor-to-liquidfeedwater heaters. The advantage of this configuration is that the potential magnitude ofentrained impurities within the feedwater stream is reduced without a significant increasein the overall heat rate of the steam turbine power plant. A preferred embodiment ofthe present invention incorporates three low pressure feedwater heaters and two highpressure feedwater heaters in conjunction with a drain cooler which is connected seriallybetween the low and high pressure feedwater heaters. An alternative embodiment of thepresent invention incorporates a liquid-to-liquid heat exchanger connected hydraulicallyin parallel with the low pressure feedwater heaters. In both embodiments of the presentinvention, the liquid-to- liquid heat exchanger of the present invention receives the drainwater from a reheater, such as a moisture separator-reheater, and exhausts this liquid toa condenser of the steam turbine power plant.
申请人：WESTINGHOUSE ELECTRIC CORP.
代理人：F. J. Baehr
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