Cyclic flow slurry fractionation

Details Cyclic flow slurry fractionation Cyclic flow slurry fractionation

1988-11-15

1991-04-30

Huppert, Michael S.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209209, 210258, 210513, 210800, B03D 300, B01D 2100

Patent

active

050110225

ABSTRACT:
Apparatus and methods are disclosed for separating or fractionating particles of differing sedimentation rates in a fluid. For fractionation, the mixture is introduced into a tube and subjected to a cyclic sequence of alternating axial flows, with optional waiting periods of zero flow. The velocities and time periods of the individual flows in the cycle are adjusted so that particles of greater and lesser sedimentation rates tend to be driven in opposite directions. At the end of each cycle there is a step of resuspension of sedimented particles without axial dispersion and independent of axial flows.

REFERENCES:
patent: 2946438 (1960-07-01), Belugou et al.
patent: 4043760 (1977-08-01), Hiatt
patent: 4066536 (1978-01-01), Ball et al.
patent: 4250026 (1981-02-01), Giddings et al.
patent: 4280823 (1981-07-01), Szonntagh
patent: 4623470 (1986-11-01), Adler
patent: 4737268 (1988-04-01), Giddings

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