Furnaces – Including fluid fuel burner – Powdered solid fuel
Patent
1987-04-09
1988-09-06
Warner, Steven E.
Furnaces
Including fluid fuel burner
Powdered solid fuel
60 39464, 110214, 110215, 110216, 110229, 110233, 110264, 110266, F23C 110
Patent
active
047684461
ABSTRACT:
In a coal combustion system suitable for a gas turbine engine, pulverized coal is transported to a rich zone combustor and burned at an equivalence ratio exceeding 1 at a temperature above the slagging temperature of the coal so that combustible hot gas and molten slag issue from the rich zone combustor. A coolant screen of water stretches across a throat of a quench stage and cools the combustible gas and molten slag to below the slagging temperature of the coal so that the slag freezes and shatters into small pellets. The pelletized slag is separated from the combustible gas in a first inertia separator. Residual ash is separated from the combustible gas in a second inertia separator. The combustible gas is mixed with secondary air in a lean zone combustor and burned at an equivalence ratio of less than 1 to produce hot gas motive at temperature above the coal slagging temperature. The motive fluid is cooled in a dilution stage to an acceptable turbine inlet temperature before being transported to the turbine.
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Mongia Hukam C.
Tramm Peter C.
Wilkes Colin
General Motors Corporation
Schwartz Saul
Warner Steven E.
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