Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Patent
1987-04-22
1988-10-11
Cintins, Ivars
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
209273, B01D 2938, B07B 120
Patent
active
047769572
ABSTRACT:
An apparatus for screening pulp comprises a vessel, a cylindrical screen within the vessel, a rotating element 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 rotating element 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-60 degrees with the first plane, the upper plane being parallel to the first plane. The rotating element may be a rotor or blade type segments. The rotor is located on the inlet side of the screen but the contour surface of the screen may be the outer or the inner surface of the screen drum. Also the screen has a contour surface which may have different configurations.
REFERENCES:
patent: 4447320 (1984-05-01), Lamort
Frejborg Frey
Lampenius Harry
A. Ahlstrom Corporation
Cintins Ivars
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