Arrangement for treatment of cellulose pulp

D - Textiles – Paper – 21 – C

Patent

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Details

D21C 9/06 (2006.01)

Patent

CA 2609832

The invention relates to a washing arrangement (200) for washing and dewatering of cellulose pulp, comprising a rotatable drum (202) with a plurality of outer compartments (204) on the drum for the pulp to be washed, which compartments are defined by axial compartment walls (204b) distributed along the circumference of the drum, a stationary cylindrical casing (208) that encloses the drum, whereby an annular space (210) is defined between the casing and the drum and where the annular space by means of longitudinal seals (212) in the axial direction of the drum is divided in zones (F, Tl, T2, U) for forming, washing and discharge of the pulp. At least two of the longitudinal seals are arranged such that they, when the drum rotates, meet compartment walls at shifted points in time with respect to each other. Preferably all of these longitudinal seals are arranged along the circumference of the drum at different positions with respect to respective opposite axial compartment walls.

La présente invention a trait à un agencement de lavage (200) pour le lavage et l'épaississement de la pâte à papier, comportant un tambour rotatif (202) avec une pluralité de compartiments externes (204) sur le tambour pour le lavage de la pâte, lesdits compartiments étant définis par des parois de compartiment axiales (204b) réparties selon la circonférence du tambour, un boîtier cylindrique stationnaire (208) renfermant le tambour, définissant ainsi un espace annulaire (210) entre le boîtier et le tambour et, où l'espace annulaire grâce à des joints longitudinaux (212) dans la direction axiale du tambour est divisé en des zones (F, T1, T2, U) pour la formation, le lavage et l'évacuation de la pâte. Au moins deux des joints longitudinaux sont agencés de sorte que, lors de la rotation du tambour, ils entrent en contact avec les parois de compartiment à des instants décalés dans le temps l'un par rapport à l'autre. De préférence, tous ces joints longitudinaux sont disposés selon la circonférence du tambour à des positions différentes par rapport aux parois de compartiment axiales opposées respectives.

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