US 11,892,160 B1
System to achieve full combustion turbine load in HRSG limited combined cycle plants
Victor Ferris, Minneapolis, MN (US); Anand Gopa Kumar, Savage, MN (US); Evan Almberg, Woodland Park, CO (US); and Bryan Craig, Oldsmar, FL (US)
Assigned to HRST, Inc., Eden Prairie, MN (US)
Filed by HRST, Inc., Eden Prairie, MN (US)
Filed on Sep. 1, 2022, as Appl. No. 17/901,311.
Int. Cl. F22B 1/18 (2006.01); F22D 5/30 (2006.01); F22B 35/10 (2006.01); F22D 5/34 (2006.01); F22D 1/28 (2006.01)
CPC F22D 5/30 (2013.01) [F22B 35/10 (2013.01); F22D 1/28 (2013.01); F22D 5/34 (2013.01)] 9 Claims
OG exemplary drawing
 
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.