Method for low load operation of a power plant with a once-through boiler
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United States of America Patent
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Feb 5, 2019
Grant Date -
Feb 4, 2016
app pub date -
Jul 23, 2015
filing date -
Jul 29, 2014
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Abstract
The once-through boiler includes a water supply and at least an economizer, an evaporator superheater. No valves are provided between the economizer, the evaporator and the superheater. The high-pressure turbine includes a control valve. The method for low load operation of a power plant with a once-through boiler and a high pressure turbine includes providing a parameter indicative of the stable operation of the once-through boiler in once-through operation, and on the basis of this parameter adjusting the control valve in order to regulate the pressure within the economizer and evaporator and/or adjusting the temperature of the water supplied to the economizer.
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