Combined heat recovery device
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United States of America Patent
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Aug 17, 2021
Grant Date -
May 21, 2020
app pub date -
Jul 10, 2018
filing date -
Aug 31, 2017
priority date (Note) -
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Abstract
A combined heat recovery device includes a high pressure cylinder of a steam turbine; a main steam pipe; a final-stage steam extraction pipe; an additional pipe additionally provided on the main steam pipe; a heat exchanger taking main steam in the main steam pipe as a heat source; a feedwater heater taking discharged steam from the heat exchanger as a heat source; and a steam side regulating valve provided on the additional pipe, configured to regulate main steam in the additional pipe, and capable of controlling a pressure of extracted steam behind the steam side regulating valve to control an outlet temperature of the feedwater heater to reach a preset feedwater temperature.
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