Gas: heating and illuminating – Processes – Fuel mixtures
Patent
1981-10-05
1983-03-01
Kratz, Peter F.
Gas: heating and illuminating
Processes
Fuel mixtures
48209, 48210, C10J 354
Patent
active
043753620
ABSTRACT:
Ash-contaminated solid or semi-solid fuel is passed into the bottom zone of a fluidized bed gasifier, preferably containing CaO to fix labile sulfur moieties, and gasified at a temperature below the ash-softening point. The resulting char and ash of relatively low size and/or weight pass to a top zone of the bed wherein the char is gasified at a temperature above the ash-softening point whereby a substantial proportion of the ash sticks to and agglomerates with solids in the top zone until the particle size and/or weight of the resulting agglomerates causes them to sink to the bottom of the gasifier from where they can be recovered. The hot gases leaving the top of the gasifying bed have a reduced burden of entrained ash, and may be cooled to prevent any entrained ash adhering to downstream equipment through which the gases pass.
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Allocca Joseph J.
Exxon Research and Engineering Co.
Kratz Peter F.
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