D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 9/06 (2006.01) B01D 33/06 (2006.01) B01D 33/60 (2006.01) B30B 9/20 (2006.01) D21C 9/18 (2006.01) D21F 1/78 (2006.01)
Patent
CA 2686943
The invention relates to a n arrangement (100) for washing and dewatering cellulose pulp comprising: a press roll (102), which is arranged to rotate during operation and which has a perforated outer surface (104) for dewatering the pulp; a stationary guide surface (106), arranged at a distance from the perforated outer surface (104) of the press roll so as to enclose the press roll (102) in the circumferential direction, such that a substantially closed vat (107) is defined between stationary guide surface (106) and the press roll (102); a pulp passage (108), being provided in said vat (107) between the perforated outer surface (104) of the press roll (102) and its stationary guide surface (106), such that during operation, pulp that is fed into the vat (107) is transported in a direction of rotation and, at the end of the pulp passage, is pressed in a pinch (110), possibly between the press roll and a second press roll. A radial distance (D) between the stationary guide surface (106) and the associated press roll (102) is generally increasing towards the pinch (110), such that the vat (107) diverges, towards the pinch (110).
Système (100) de lavage et d'essorage pour pâte à papier cellulosique, comprenant: un rouleau de presse (102) conçu pour tourner pendant la marche et présentant une surface extérieure perforée (104) pour l'essorage de la pâte; une surface de guidage fixe (106) disposée à une certaine distance de la surface extérieure perforée (104) du rouleau de presse de manière à recouvrir ledit rouleau (102) dans le sens circonférentiel et de définir ainsi un espace sensiblement fermé (107) entre le guide de surface fixe (106) et le rouleau de presse (102); un passage pour la pâte (108) dans ledit espace (107) entre la surface extérieure perforée (104) du rouleau de presse (102) et sa surface de guidage fixe (106) de telle sorte que pendant la marche, la pâte entrant dans l'espace (107) est transportée dans le sens de rotation, et à la fin du passage, est comprimée dans un pincement (110) éventuellement entre le rouleau de presse et un second rouleau de presse. La distance radiale (D) entre la surface de guidage fixe (106) et le rouleau de presse y associé (102) va généralement en augmentant vers le pincement (110) de sorte que l'espace (107) s'écarte vers ledit pincement (110).
Fetherstonhaugh & Co.
Metso Paper Inc.
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