Furnaces – Utilizing powdered fuel – Having rotary flow means
Patent
1982-04-30
1983-10-04
Favors, Edward G.
Furnaces
Utilizing powdered fuel
Having rotary flow means
60 3946S, 110347, F23D 102
Patent
active
044072058
ABSTRACT:
A coal combustor/gasifier is disclosed which produces a low or medium combustion gas for further combustion in modified oil or gas fired furnaces or boilers. Two concentric shells define a combustion volume within the inner shell and a plenum between them through which combustion air flows to provide regenerative cooling of the inner shell for dry ash operation. A fuel flow and a combustion air flow having opposed swirls are mixed and burned in a mixing-combustion portion of the combustion volume and the ash laden combustion products flow with a residual swirl into an ash separation region. The ash is cooled below the fusion temperature and is moved to the wall by centrifugal force where it is entrained in the cool wall boundary layer. The boundary layer is stabilized against ash re-entrainment as it is moved to an ash removal annulus by a flow of air from the plenum through slots in the inner shell, and by suction on an ash removal skimmer slot.
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Besha Richard G.
Favors Edward G.
Gottlieb Paul A.
Whisker Robert H.
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