| 摘要 |
The invention relates to a washing arrangement (100) comprising one or po ssibly two co-operating cylindrical press rolls (102), each having a perfora ted outer surface (104). A guide surface (106) is provided at a distance fro m the perforated outer surface (104) and encloses the respective press roll in the circumferential direction over at least 225° of the roll's circumfere nce, wherein a pulp passage (108) is provided between the perforated outer s urface and the guide surface. During operation, pulp that is fed into the pu lp passage is guided in a direction of rotation of the respective press roll and is pressed in a pinch (110) between the press rolls. The radial distanc e (D) between the outer surface (104) of the press roll (102) and the guide surface (106) is substantially the same throughout a portion of the pulp pas sage (108) in the circumferential direction.
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