Rotor for pressurized hydrodynamic purification of paper pulp an

Details Rotor for pressurized hydrodynamic purification of paper pulp an Rotor for pressurized hydrodynamic purification of paper pulp an

1994-06-14

1995-12-19

Terrell, William E.

Classifying, separating, and assorting solids

Sifting

With liquid treatment

209300, 209379, 210415, B07B 120, B07B 150

Patent

active

054761786

ABSTRACT:
The invention concerns a rotor for the pressurized, hydrodynamic purification of paper pulp from old papers in known purifying equipment comprising a cylindrical screen, characterized in that it comprises a generally cylindrical case extending along a longitudinal axis of rotation 6 and comprising a sequence of n identical elements 8 arrayed side-by-side along the longitudinal axis 6, the screen-side wall evincing a shoulder 14 on either side of which it winds spirally around the longitudinal axis over at least 360.degree., the base and the top of the shoulder subtending a very slight angular gap .OMEGA. relative to said axis in such manner that the shoulder side 14 slopes toward the screen surface, the slope angle .alpha. relative to the radial plane through the shoulder base being between 5 and 80.degree., the elements 8 being mutually shifted in the direction of rotation around the axis 6 by an angle .beta. with a magnitude of at least 360.degree.
, where n is at least 3.

REFERENCES:
patent: 1921750 (1933-08-01), Heinrich et al.
patent: 3726401 (1973-04-01), Bolton, III et al.
patent: 4188286 (1980-02-01), Holz
patent: 4200537 (1980-04-01), Lamart
patent: 4447320 (1984-05-01), Lamart
patent: 4744894 (1988-05-01), Gauld

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