| 摘要 |
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 DEG , 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 DEG , 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 DEG /n, where n is at least 3.
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