Waste heat steam generator
AssigneeSulzer Brothers Limited
InventorEmile Aguet
Life of this patent
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Abstract
The waste heat steam generator employs two parallel channels for receiving flows of exhaust gas from a gas turbine. In one channel, the exhaust gas flow is heated by a supplemental burner to a temperature less than 900.degree. C while the flow of exhaust gas in the second channel is heated to a temperature above 900.degree. C. The amount of fuel supplied to each burner is controlled by various control means responsive to the temperature within the steam generator or the temperature of the live steam or by the pressure of the live steam. A distribution means is provided at the entrance to the channel in which the exhaust gas is heated to a temperature above 900.degree. C so as to control the flow therein. The steam generator can be easily adapted to partial load operation by regulating the amount of fuel to the supplemental burners.
Claims12
A waste heat steam generator comprising
- an entrance for receiving a flow of exhaust gas;
- a pair of channels disposed in parallel relation relative to a flow of exhaust gas downstream of said entrance;
- at least one heating surface in each said channel for conveying a working medium therein in heat exchange relation with a flow of exhaust gas in said respective channel;
- a first supplemental burner disposed in one of said channels to heat a flow of exhaust gas therein to a temperature above 900.degree. C.;
- and
- a second supplemental burner disposed between said entrance and said heating surface in said other of said channels to heat a flow of exhaust gas therein to a temperature less than 900.degree. C.
Dependencies are inferred from the claim text.