| 摘要 |
PCT No. PCT/SE89/00568 Sec. 371 Date Mar. 21, 1991 Sec. 102(e) Date Mar. 21, 1991 PCT Filed Oct. 16, 1989 PCT Pub. No. WO90/05807 PCT Pub. Date May 31, 1990.Devices for screening pulp suspensions are disclosed including a cylindrical screen extending longitudinally within a housing, an inlet for feeding the pulp suspension into the interior of the cylindrical screen, an accept outlet for removing the accept portion of the pulp suspension after it has passed through the cylindrical screen, a reject outlet for removing a reject portion of the pulp suspension at the opposite end of the cylindrical screen with respect to the inlet, and a rotor concentrically positioned for rotation within the cylindrical screen such that an annular screen chamber is created between the rotor and the screen, the rotor including wings extending from its exterior such that the wings have a length circumferentially with respect to the rotor which ranges from about 2:1 to about 6:1 with respect to the distance between the rotor and the screen, and the leading edges of the wings being separated a greater distance from the rotor than the trailing edges of the wings.
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