Twin wire press

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 1/80 (2006.01) B30B 5/06 (2006.01) B30B 9/24 (2006.01) D21F 1/66 (2006.01)

Patent

CA 2755777

A twin wire press for dewatering solid-liquid suspensions, such as pulp suspensions, between top and bottom webs is described herein which includes consecutive primary, secondary and tertiary dewatering sections. The primary dewatering section includes a wedge area. The secondary dewatering section is positioned adjacent to the primary section downstream therefrom and includes grooved rolls in an s-roll configuration. The tertiary dewatering section includes rolls in a scissor-nip configuration. The press rolls in the secondary and tertiary section are all supported onto a frame. Whenever maintenance is to be performed on any one of the grooved rolls or on the press roll assemblies, an overhead crane can for example be used since no frame structure is provided on top thereof.

L'invention porte sur une presse à double toile destinée à éliminer l'eau contenue dans des suspensions solide-liquide, telles que des suspensions de pulpe, entre des toiles supérieure et inférieure, laquelle presse comprend des sections primaire, secondaire et tertiaire consécutives d'élimination de l'eau. La section primaire d'élimination de l'eau comprend une zone en coin. La section secondaire d'élimination de l'eau est positionnée de manière adjacente à la section primaire en aval de celle-ci et comprend des rouleaux rainurés dans une configuration de rouleaux en S. La section tertiaire d'élimination de l'eau comprend des rouleaux dans une configuration de pince et ciseau. Les rouleaux de presse de la section secondaire et de la section tertiaire sont tous portés sur une armature. Si une maintenance doit être réalisée sur n'importe lequel des rouleaux rainurés ou sur les ensembles rouleaux de presse, on peut utiliser ensuite un pont roulant puisque aucune structure d'armature n'est disposée au-dessus de ceux-ci.

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