Dilution centrifuging of bitumen froth from the hot water...

Details Dilution centrifuging of bitumen froth from the hot water... Dilution centrifuging of bitumen froth from the hot water...

C - Chemistry, Metallurgy

10

G

196/22

C10G 1/04 (2006.01) B03B 9/02 (2006.01) C10G 31/10 (2006.01)

Patent

CA 1072473

ABSTRACT In the known operation wherein naphtha-diluted bitumen froth is pumped from a scroll-type centrifugal separator to a disc-type centrifugal separator, an improved pumping system is provided. The system comprises at least two centrifugal pumps in series, each operating at less than 65% of design capacity. The invention is based on the discovery that dilution with naphtha greatly increases the emulsification tendency of the froth components; therefore it is necessary to reduce shearing of this stream to keep the solids and water content of the disc product within a desirable limit. This is achieved by using staged pumps and operating the pumps at a relatively low tip speed.

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