| 摘要 |
<p>Apparatus for screening waste paper pulp comprises a casing (1) with a pulp slurry inlet (2), an accept stock outlet (4) and a reject outlet (3). A rotor (5b; 5; 5c) carries a plurality of scraper blades (7) which are spaced from a cylindrical screen plate (8) to define a screen passage (11). A circulation passage (5b; 22; 31) is defined within the rotor or spaced therefrom within the casing. In use, the rotor and scraper blades are rotated and circulate the pulp slurry around the screen passage and the circulation passage, whereby the pulp slurry is caused to move repeatedly over the surface of the screen plate. That portion of the pulp slurry which passes through the screen plate is withdrawn through the accept stock outlet. <IMAGE></p> |
