Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1982-04-28
1984-01-24
Hill, Ralph J.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209148, B03B 500, D21D 522
Patent
active
044275412
ABSTRACT:
Fractionation apparatus (20) is disclosed which utilizes a rapidily rotating disk which receives a liquid suspension of particles to be separated onto its rotating face surface (35). When the film of liquid and particles on the rotating face surface (35) reaches the peripheral edge (38) of the face, particles above a certain size are radially ejected while smaller particles and the liquid are carried over the edge onto the surface of a depending rim (39). The suspension of smaller particles and liquid is carried down the rim to the rim edge (40) at which point the smaller particles and liquid are disengaged. A separator wall (27) may be interposed between the two streams of particles emanating from the disk (24) to provide a physical separation of the larger and smaller particles once they have left the disk. The characteristics of the face surface, the angle of the rim with respect to the face, the disk speed, suspension feed rate, and other operating conditions can be selected such that highly efficient fractionations of particle suspensions, such as wood pulp slurries, can be obtained about a selected break point particle size.
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Moller et al., "Screening, Cleaning and Fractionation, with an Atomizer", Paper Technology and Industry, vol. 20 (3), pp. 110-114, Apr. 1979.
Moller et al., "High Consistency Pulp Fractionation with an Atomizer", Tappi, vol. 63 (9), pp. 89-91, Sep. 1980.
Crosby Edwin J.
Oroskar Anil R.
Bremer Howard W.
Engstrom Harry C.
Hill Ralph J.
Wisconsin Alumni Research Foundation
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