| 摘要 |
The invention relates to a washing arrangement (100) comprising two co-operating cylindrical press rolls (102), at least one having a perforated outer surface (104). There is a guide surface (106) at a distance from the perforated outer surface partially enclosing the press roll in the circumferential direction, and a pulp passage (108) is provided between the perforated outer surface and the guide surface. During operation, pulp fed into the pulp passage is guided in direction of rotation and pressed between the press rolls. Filtrate passes through the perforated surface and into the press roll. It is proposed to provide the washing arrangement with means for separate collection of a filtrate flow (128) from a first portion of the pulp passage. Such filtrate contains comparatively high amounts of fiber and can by means of the invention be handled separately from the main filtrate flow (130), reducing the negative effects associated with fibers in the filtrate. |
