Plant for extracting crude oil from oil shale

C - Chemistry – Metallurgy – 10 – B

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C10B 53/06 (2006.01) C10G 1/02 (2006.01) C10G 1/06 (2006.01)

Patent

CA 1214420

Abstract of the Disclosure An arrangement for extracting crude oil from oil shale compris- ing: a low temperature carbonization reactor for effecting the hydrogenating low temperature carbonization of the oil shale under pressure; a processing means, upstream of the low temper- ature carbonization reactor, for processing the oil shale, in particulate form, by mixing it with a solvent and with hydrogen and for feeding the resulting oil shale slurry into the low temperature carbonization reactor; a separating means, down- stream of the low temperature carbonization reactor, for separating the resulting gaseous low temperature carbonization mixture from the used oil shale and for separating the low temperature carbonization mixture into gaseous and liquid low temperature carbonization products; and a means for recycling the solvent to the processing means; a gas turbine the exhaust gas outlet of which is connected to two heat exchangers, one of which heat exchangers is disposed in a circulation system for a scavenging gas, which circulation system includes a separating reactor (which forms part of said separating means} in which in use the scavenging gas flows upwardly in counterflow to the oil shale for separation of the fluid low temperature carbonization mixture from the used oil shale, and the other of which heat exchangers is disposed between the low temperature carbonization reactor and said separating reactor; the low temperature carbonization reactor including a fluidizing cooler with a fluidized bed means for feeding: used oil shale from the separating reactor to the fluidized bed and means for feeding turbine exhaust gas from either or both of said two heat exchangers to the fluidized bed for fluidizing the bed.

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