Immersible rotary disc filtration device

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 33/21 (2006.01) B01D 29/05 (2006.01) B01D 63/16 (2006.01) B01D 65/08 (2006.01)

Patent

CA 2237061

Rotary disc filtration devices and filtration processes using these devices are disclosed. The devices have one or more filtration gaps into which fluid to be filtered into permeate or retentate is placed. Each fluid filtration gap is defined by a disc (46) and a filter (44), one of which rotates with respect to the other. The filter is carried on a filter member. The discs and interleaved filter members may be suspended from the top (32, 34) of the device, the top may rest on a vessel containing the fluid to be filtered, the discs may be attached to a single shaft (38) for rotation, and the filter members may be suspended from a sleeve (42) around the shaft, which sleeve keeps the filters centered with respect to the discs. Removal of the device's top removes the discs and filter members together facilitating maintenance.

Cette invention concerne des dispositifs de filtration à disques rotatifs et des procédés de filtration faisant appel à ces dispositifs. Lesdits dispositifs comportent au moins un espace de filtration à l'intérieur duquel on place le fluide à filtrer aux fins d'obtention du perméat ou du rétentat. Chaque espace de filtration du fluide est défini par un disque (46) et un filtre (44), l'un de ces deux éléments étant rotatif par rapport à l'autre. Le filtre est porté par un élément filtrant. Les disques et les éléments filtrants imbriqués peuvent être suspendus à la partie supérieure (32, 34) du dispositif, ladite partie supérieure peut s'appuyer sur une cuve contenant le fluide à filtrer, les disques peuvent être fixés à un arbre de rotation unique (38), et les éléments filtrants peuvent être suspendus à un manchon (42) enveloppant l'arbre, ledit manchon maintenant le centrage des filtres par rapport aux disques. Le retrait de la partie supérieure du dispositif permet le retrait des disques et des éléments filtrants dans leur ensemble, ce qui facilite l'entretien.

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