Steam generator
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United States of America Patent
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May 16, 2000
Grant Date -
N/A
app pub date -
Aug 12, 1998
filing date -
Aug 15, 1997
priority date (Note) -
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Abstract
A steam generator for a combined gas/steam power station plant has a gas-turbine circuit and a steam-turbine circuit, the exhaust gases of a gas turbine (4) giving off their residual heat to a steam turbine via the working medium flowing in a multi-pressure steam generator, each pressure system of the steam generator essentially comprising an economizer (21), an evaporator (22) and a superheater (23). To control the steam temperatures, a steam/steam heat exchanger (58), which can be shut off, is arranged in such a way that heat can be transferred from the hotter vaporous medium to a colder vaporous medium. To this end, the heat exchanger (58) is connected in the region of the respective superheaters (23, 19) between the high-pressure system as hotter heat-exchange area and the low-pressure system as colder heat-exchange area.
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