Gas: heating and illuminating – Generators – Cupola
Patent
1975-07-09
1976-11-30
Lindsay, Jr., Robert L.
Gas: heating and illuminating
Generators
Cupola
48197R, 48210, 110105, 302 53, 302 59, C10J 350
Patent
active
039947017
ABSTRACT:
Charges of finely comminuted solid fuel particles are admitted into an oxygen-containing gasification chamber through a system of locks having an uppermost bunker which is maintained at atmospheric pressure, an intermediate bunker wherein the pressure alternately rises and drops, a lowermost bunker wherein the pressure is always above atmospheric, a metering device which connects the lowermost bunker with the gasification chamber, a pipe which can supply compressed inert gas into the intermediate bunker after the latter has received a charge of fuel particles from the uppermost bunker but before the intermediate bunker is respectively sealed from the uppermost bunker and connected with the lowermost bunker, and a pipe which evacuates compressed gas from the intermediate bunker subsequent to transfer of a charge into the lowermost bunker. The thus evacuated compressed gas is fed to a pneumatic conveyor which supplies charges of fuel particles from a main source to the uppermost bunker while the latter is sealed from the intermediate bunker. The gas evacuating pipe can contain a storage tank for compressed gas so that the admission of fuel particles into the uppermost bunker can be timed independently of the gas pressure in the intermediate bunker.
REFERENCES:
patent: 3001652 (1961-09-01), Schroeder et al.
patent: 3775071 (1973-11-01), Hoffert et al.
patent: 3809438 (1974-05-01), Hubbard
Barker et al., "Pressure Feeder for Powdered Coal or Other Finely Divided Solids" Industrial and Engineering Chemistry, vol. 43, No. 5, May 1961.
Lindsay, Jr. Robert L.
Shell Internationale Research Maatschappij B.V.
Striker Michael J.
Yeung George C.
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