Screen cylinder with performance boosting configuration

Details Screen cylinder with performance boosting configuration Screen cylinder with performance boosting configuration

B - Operations, Transporting

01

D

B01D 29/35 (2006.01) B01D 29/11 (2006.01)

Patent

CA 2426644

A screen cylinder (125) used for screening cellulosic fibrous material pulp in the pulp and paper industry incorporates first (66) and second (67) downstream surfaces (16) having contoured slopes that form a funnel entrance of the grooves (13) at the screen cylinder slots (17). The contoured construction of the screen cylinder (125) effects greatly enhanced utility compared to conventional milled and discrete element screen cylinders, including substantially avoiding the Coanda effect.

L'invention porte sur une cylindre à tamis (125) destiné à épurer la pâte à papier en matière cellulosique fibreuse dans l'industrie de la pâte à papier et du papier. Ledit cylindre comprend une première (66) et une deuxième (67) surface aval, ces surfaces ayant des pentes profilées qui forment une entrée en entonnoir (13) pour les rainures au niveau des fentes (17) du cylindre d'épuration. La conception profilée du cylindre à tamis (125) permet non seulement d'augmenter considérablement son efficacité par rapport aux cylindres à tamis à éléments séparés et fraisés traditionnels mais aussi d'éviter, dans la majorité des cas, l'effet Coanda.

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