Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Patent
1988-10-03
1990-08-21
Cintins, Ivars
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
209273, B01D 2962, B07B 120
Patent
active
049504029
ABSTRACT:
An apparatus for screening pulp comprises a vessel, a cylindrical screen within the vessel, a rotor moving in the vicinity of the screen at a predetermined speed, an inlet for the unscreened pulp, an outlet for the screened pulp in the vessel. The rotor is non-cylindrical, for instance, elliptical, triangular and, in general, is multi-cam. The rotor has a contour surface, for instance grooves formed of a first bottom plane parallel to the envelope surface, an inclined plane, an upper plane and a side plane, the side plane being essentially perpendicular to the first bottom plane, the inclined plane forming an angle between 5 degrees and 60 degrees with the first plane, the upper plane being parallel to the first plane. The contour surface of the rotor may also be achieved by attaching bars of the contoured shape to the surface of the rotor, for instance by welding.
REFERENCES:
patent: 3400820 (1968-09-01), Nelson
patent: 3726401 (1973-04-01), Bolton et al.
patent: 4529520 (1985-07-01), Lampenius
patent: 4676903 (1987-06-01), Lampenius et al.
patent: 4776957 (1988-10-01), Lampenius et al.
A. Ahlstrom Corporation
Cintins Ivars
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