Process and plant for refining oil-containing solids

摘要

A process for refining oil-containing includes introducing the oil-containing solids to a reactor so as to expel an oil-containing vapor from the solids at a temperature of 300 to 1000° C. The oil-containing vapor expelled from the reactor is supplied to a cracker so as to crack heavy oil components of the oil-containing vapor. The cracked heavy oil components obtained in the cracker are separated and withdrawn from the cracker. The solids left in the reactor and an unevaporated fraction of heavy hydrocarbons are introduced into a furnace. The unevaporated fraction of heavy hydrocarbons in the furnace are burned at a temperature of 600 to 1500° C. The solids from the furnace are recirculated into the reactor. A conveying gas is supplied into a rising pipe, wherein the stream of solids withdrawn from the furnace is fluidized by the conveying gas and transported to the reactor through the rising pipe.

主权项

1. A process for refining oil-containing solids, the process comprising:
introducing the oil-containing solids to a reactor so as to expel an oil-containing vapor from the solids at a temperature of 300 to 1000° C.; supplying the oil-containing vapor expelled from the reactor to a cracker so as to crack heavy oil-components of the oil-containing vapor; separating and withdrawing from the cracker the cracked heavy oil components obtained in the cracker; introducing into a furnace solids remaining in the reactor, the solids including an unevaporated fraction of heavy hydrocarbons; burning the unevaporated fraction of heavy hydrocarbons in the furnace at a temperature of 600 to 1500° C.; recirculating the solids from the furnace into the reactor, wherein, during the recirculating, an oxidizing atmosphere of the furnace is separated from an atmosphere of the reactor by a blocking device between the furnace and the reactor, the blocking device including a downpipe and a rising pipe branched off from the downpipe in an upward direction in a vicinity of a bottom of the downpipe; withdrawing a stream of solids from the furnace through the downpipe; and supplying a conveying gas into the rising pipe so as to fluidize the stream of solids withdrawn from the furnace and transport the stream of solids to the reactor, the stream of solids traveling inside of the rising pipe.