A dilute aqueous slurry of viscosity 0.001 N-s/m 2 and density 1,000 kg/m 3 is to be

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A dilute aqueous slurry of viscosity 0.001 N-s/m2 and density 1,000 kg/m3 is to be separated from the solid particles, which have a density of 3,000 kg/m3, by centrifugal sedimentation. Pilot-plant runs at a feed rate of 10 X10–6 m3/s using a disc-stack centrifuge, shown in Figure 19.34, with n = 20 disks; a disk angle, u, of 45from the vertical; an outer radius R0 = 0.075 m and an internal radius R1 of 0.025 m; and operating at a bowl speed of 20,000 rpm, give satisfactory results. The same separation is to be carried out in a plant using a disc centrifuge with R= 0.25 m and R= 0.075 m, 100 disks, a disk angle of 50°, and rotating at 14,000 rpm. The sigma scale-up theory used in Example 19.10 with (19-33) applies, except that for a disc centrifuge [24],

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Separation Process Principles Chemical And Biochemical Principles

ISBN: 9780470481837

3rd Edition

Authors: By J. D. Seader, Ernest J. Henley, D. Keith Roper

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