Gas: heating and illuminating – Processes – Coal and water
Patent
1981-05-28
1983-07-05
Smith, William F.
Gas: heating and illuminating
Processes
Coal and water
48206, C10J 354
Patent
active
043916120
ABSTRACT:
A gaseous effluent rich in hydrogen and carbon monoxide is produced from coal by a process which involves the gasification of the coal in a fluidized gasification zone interconnected with a combustor zone comprising a combustion unit and an entrained flow lift column with transfer of solid material between the gasification zone and the combustor zone, in a system in which lime-treated coal and steam are fed to the gasification zone to which heat is supplied by clinker material transferred from the combustor zone. At the same time, gasified coal residue or "char" and clinker are transferred from the gasification zone to the combustor zone wherein the char is brought into contact with air in the presence of the clinker particles circulating from the bottom of the gasification zone, and the final gas and heat values from the coal are extracted by combustion of the char, the coal ash with the lime emerging as fine particles. Heat from the combustion of the char is absorbed by the circulating clinker in the combustion unit and in the lift column of the combustor zone and this heat is transferred to the gasification zone when the clinker is supplied to it. The clinker transferred to the gasification zone, in accordance with the invention, has a predetermined particle size of the order of 1/32 inch to 1/4 inch and represents clinker which is removed from the combustor zone by the action of the rising gases. The thus gas-transported clinker is separated from "fines." The separated clinker particles are transferred to the gasification zone to supply required heat.
REFERENCES:
patent: 2716055 (1955-08-01), Pearce
patent: 2741549 (1956-04-01), Russell
patent: 3171369 (1965-03-01), Stephen, Jr. et al.
patent: 3985519 (1976-10-01), Kalina et al.
patent: 4046523 (1977-09-01), Kalina
patent: 4261856 (1981-04-01), McMinn, Jr.
Long William C.
Smith William F.
Stewart Riggs T.
The Halcon SD Group, Inc.
Wells Harold N.
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