Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Patent
1987-06-11
1989-11-14
Cintins, Ivars
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
209273, B01D 2938, B07B 120
Patent
active
048805408
ABSTRACT:
The pulp screening apparatus comprises a housing having an inlet for allowing fibrous stock to be introduced into the interior, a first outlet for allowing the accept screened stock to be removed, a second outlet for the reject, a screen having a contour surface within the housing, a rotor moving in the vicinity of the screen at a predetermined speed and forming together with the screen an annular screening chamber. The rotor has at least the surface facing the screen partially contoured and is provided with a plurality of perforations along at least a portion of the length of the screening chamber to allow fibrous stock to be introduced into the screening chamber and to prevent the undesired debris of the stock from entering the chamber. Both sides of the rotor may have a contoured surface with grooves.
REFERENCES:
patent: 4188286 (1980-02-01), Holz
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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