| 摘要 |
The invention relates to a washing arrangement (100) comprising two co-op erating cylindrical press rolls (102), at least one having a perforated oute r surface (104). There is a guide surface (106) at a distance from the perfo rated outer surface partially enclosing the press roll in the circumferentia l direction, and a pulp passage (108) is provided between the perforated out er surface and the guide surface. During operation, pulp fed into the pulp p assage is guided in direction of rotation and pressed between the press roll s. Filtrate passes through the perforated surface and into the press roll. I t is proposed to provide the washing arrangement with means for separate col lection of a filtrate flow (128) from a first portion of the pulp passage. S uch filtrate contains comparatively high amounts of fiber and can by means o f the invention be handled separately from the main filtrate flow (130), red ucing the negative effects associated with fibers in the filtrate.
|
