Rotary filtration device with flow-through inner member

Details Rotary filtration device with flow-through inner member Rotary filtration device with flow-through inner member

B - Operations, Transporting

01

D

B01D 33/06 (2006.01) B01D 29/11 (2006.01) B01D 35/027 (2006.01) B01D 35/06 (2006.01) B01D 36/00 (2006.01) B01D 63/16 (2006.01) B01D 65/08 (2006.01)

Patent

CA 2327659

Rotary filtration devices have at least one inner member (36) and at least one outer member (26), which rotate and define a fluid filtration gap (48) therebetween. During filtration, permeate passes from the feed fluid in the gap (48) through the filters (34) facing the gap (48). The inner member (36) has an internal pathway (46) for the flow of feed fluid. Fluid to be filtered flows from the body of the feed fluid through the internal pathway (46), reverses direction (70), and flows through the filtration gap (48) back to the body of the feed fluid. Alternatively, fluid to be filtered passes from the body of the feed fluid through the fluid filtration gap (48), reverses direction, and flows through the internal pathway (46) back to the body of the feed fluid. The outer member (26) may be closed so that feed keeps circulating in the fluid filtration gap (48) until it leaves through the filter (34) as permeate or reenters the surrounding reservoir (60) of feed fluid.

La présente invention concerne des dispositifs de filtration tournants possédant au moins un élément intérieur (36) et au moins un élément extérieur (26) qui tournent et qui définissent entre eux un espace de filtration (48) de liquide. Pendant la filtration, le perméat parcourt le corps d'arrivée en fluide de l'espace de filtration (48) et passe à travers les filtres (34) qui font face à l'espace de filtration (48). L'élément intérieur (36) présente un trajet interne (46) d'écoulement de fluide. Le fluide à filtrer, qui provient du corps d'arrivée en fluide, parcourt le trajet interne (46), change de direction (70), et passe par l'espace de filtration (48) et retourne au corps d'arrivée en fluide. Dans une autre réalisation, le fluide à filtrer, qui provient du corps d'arrivée en fluide, passe par l'espace de filtration (48), change de direction, parcourt le trajet interne (46) pour revenir au corps d'arrivée en fluide. L'élément extérieur (26) est éventuellement clos, ce qui permet, grâce à l'alimentation, de maintenir le fluide en circulation dans l'espace de filtration (48) jusqu'à ce qu'il quitte le filtre (34) en tant que perméat ou bien retourne au réservoir périphérique (60) de fluide.

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