CPC F22D 5/30 (2013.01) [F22B 35/10 (2013.01); F22D 1/28 (2013.01); F22D 5/34 (2013.01)] | 9 Claims |
1. A method of suppressing steam production in heat recovery steam generator comprising:
diverting a flow of feed water upstream from an economizer series;
controlling the volume of the diverted flow of feed water and bypassing a portion of the economizer series from receiving the controlled volume of diverted flow of feed water;
returning the controlled volume of diverted flow of feed water to a downstream portion of the economizer series;
heating the controlled volume of diverted flow of feed water in said downstream portion of the economizer series to reduce an approach temperature;
transferring the heated controlled volume of diverted flow of feed water to a high pressure steam drum in fluid flow communication with an evaporator;
mixing the heated controlled volume of diverted flow of feed water with heated steam drum water reducing the temperature of mixed water in the high pressure steam drum;
passing the mixed water from the high pressure steam drum to the evaporator producing steam;
reducing the rate of steam production for the mixed water in the evaporator, reducing the steam pressure in the evaporator, and decreasing the steam flow exiting the evaporator;
transferring the steam flow exiting the evaporator to a superheater; and
metering the steam flow exiting the superheater.
|