Method for carefully distilling residual oil for a short time

Details Method for carefully distilling residual oil for a short time Method for carefully distilling residual oil for a short time

C - Chemistry, Metallurgy

10

G

C10G 9/28 (2006.01) C10G 9/00 (2006.01)

Patent

CA 2394256

The invention relates to a residual oil caused by the treatment of crude oil, natural bitumen or oil sand. The residual oil is mixed with grained, hot coke acting as a heat transfer medium (thermal coke) in a mixer and at a weight ratio of 1:3 to 1:30. A liquid residual film is produced on the grains of the thermal coke. Said film partially vaporises in the mixer. Gases and vapours and moist, sticky coke are withdrawn from the mixer. The mixture consisting of coke and residual oil is guided into a downstream stirrer pot and slowly moves downwards in said pot, whereby the mixture is stirred mechanically at a temperature ranging from 450 to 600 °C and preferably 480 to 550 °C. Dry, pourable coke is withdrawn from the stirrer pot. Sojourn time of the thermal coke in the stirrer pot usually amounts to 1 to 30 minutes.

Selon l'invention, des huiles résiduelles provenant du traitement de pétrole, de bitume naturel, ou de sable pétrolifère, sont mélangées dans un mélangeur à du coke chaud granulaire en tant que caloporteur (coke caloporteur), dans une relation massique de 1:3 à 1:30, une pellicule résiduelle liquide, s'évaporant partiellement dans le mélangeur, se formant d'abord sur les grains du coke caloporteur. Les gaz, les vapeurs, et le coke collant humide sont extraits du mélangeur. Le mélange coke/huiles résiduelles est amené dans un réservoir de mélange placé en aval, dans lequel le mélange se déplace lentement vers le bas sous mélange mécanique à des températures de 450 à 600 DEG C, de préférence de 480 à 550 DEG C. Du coke coulant et sec est retiré du réservoir de mélange. Habituellement, le temps de séjour du coke caloporteur dans le réservoir de mélange est de 1 à 30 minutes.

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