C - Chemistry – Metallurgy – 10 – J
Patent
C - Chemistry, Metallurgy
10
J
48/35
C10J 3/00 (2006.01) C10J 3/54 (2006.01)
Patent
CA 1150510
ABSTRACT A method of Gasifying an Ash-Containing Fuel in a Fluidized Bed A method of gasifying an ash-containing fuel in a single fluidized conversion bed in which the fuel is passed into a lower region of a bottom zone of the bed wherein the fuel is at least partially gasified at a temperature below the ash-softening point. The resulting fuel and ash are of a sufficiently small size and/or weight to pass from the bottom zone to a top zone of the bed wherein the temperature is above the ash-softening point whereby unconsumed fuel is at least partially combusted and ash particles stick to each other and/or to solids in the top zone of the bed until the particle size and/or weight of the resul- ting agglomerates causes them to sink to the bottom of the bed from where they can he removed. The bottom zone may contain CaO-comprising particles to fix labile sulfur. The hot combustible gases leaving the top of the bed have a reduced burden of entrained ash and may be cooled, e.g. by admixture with cool flue gas to prevent entrained ash adhering to downstream equipment through which the gases pass.
332841
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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