Appeal No. 1997-0793
Application 08/107,633
Appellant’s claimed invention is directed toward a method
for producing combustible gases from solid fuel such as
pulverized coal. Claim 1 is illustrative:
1. A method for generating combustible gases from a
solid fuel comprising:
a) semi-coking the solid fuel in a reactor in the
absence of oxygen to produce a solids stream that includes
carbonaceous material and a gas stream that includes
hydrocarbon gases and tar fumes;
b) gasifying the carbonaceous material in said solids
stream in a fluidized bed using steam and hot air to produce
an output stream that includes combustible gases and coke
particles;
c) combining said output stream with said gas stream to
form a combined stream;
d) separating said combined stream into a combustible
gas stream and a hot particulate stream; and
e) applying at least a part of said hot particulate
stream to said reactor.
THE REFERENCES
Roetheli 2,579,397 Dec. 18,
1951
Howard 2,582,712 Jan. 15,
1952
Barr 2,622,973 Dec. 23,
1952
Friedman 3,966,633 Jun. 29,
1976
Reh et al. (Reh) 4,347,064 Aug. 31,
1982
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