초록 ▼

Combustible gases from a solid fuel are produced by pyrolyzing the fuel in a pyrolyzer which also produces carbonaceous material. The carbonaceous material from the pyrolyzer is combusted in a furnace to produce combustion products that include hot flue gases and ash particulate. The combustion prod

Combustible gases from a solid fuel are produced by pyrolyzing the fuel in a pyrolyzer which also produces carbonaceous material. The carbonaceous material from the pyrolyzer is combusted in a furnace to produce combustion products that include hot flue gases and ash particulate. The combustion products are separated into a plurality of streams, one of which contains flue gases, and another of which contains hot ash which is directed into the pyrolyzer. Finally, the stream of flue gases from the furnace is used to dry the fuel that is supplied to said pyrolyzer.

대표청구항 ▼

[ What is claimed is:] [1.] A method comprising:a) pyrolyzing a sulfur bearing fuel together with oil shale containing calcium compounds to produce a combustible gaseous product stream and a carbonaceous residue product stream;b) combusting said residue product stream with excess air at a temperatur

[ What is claimed is:] [1.] A method comprising:a) pyrolyzing a sulfur bearing fuel together with oil shale containing calcium compounds to produce a combustible gaseous product stream and a carbonaceous residue product stream;b) combusting said residue product stream with excess air at a temperature sufficient to produce a hot product stream containing hot gases and hot particulate at a temperature higher than the temperature of said gaseous product stream;c) separating hot particulate from said hot product stream to produce a hot gas stream;d) feeding back separated particulate to said pyrolyzer;e) transferring heat from said hot gas stream to a gas supplied to a burner; andf) burning said combustible gaseous product stream in said burner.