Rotary disc filtration device with means to reduce axial forces

Details Rotary disc filtration device with means to reduce axial forces Rotary disc filtration device with means to reduce axial forces

B - Operations, Transporting

01

D

B01D 33/15 (2006.01) B01D 29/05 (2006.01)

Patent

CA 2320849

Rotary disc filtration devices and filtration processes using those devices are disclosed. The devices (20) have one or more fluid filtration gaps (40) into which fluid to be filtered into permeate and retentate is placed. Each fluid filtration gap is defined by a disc and a filter, one of which rotates with respect to the other. The filter is carried on a filter support member (34). Fresh feed is introduced to each fluid filtration gap (40) near the longitudinal axis of the shaft (28) on which the discs (36) are rotated. Notes (66) through the disc (36) in the active area of the disc (36), which is the area opposite the filter (42), counter act the tendency of the disc (36) and filter (42) to move towards one another.

L'invention concerne des dispositifs de filtration à disques rotatifs et des procédés de filtration utilisant lesdits dispositifs. Les dispositifs (20) comportent un ou plusieurs espaces de filtration (40) de fluide, dans lesquels on introduit le fluide à filtrer afin de le séparer en perméat et rétentat. Chaque espace de filtration (40) est défini par un disque (36) et un filtre (42), dont l'un tourne par rapport à l'autre. Le filtre (42) est supporté par un élément support (34). On introduit une nouvelle charge dans chaque espace de filtration (40) près de l'axe longitudinal de l'arbre (28) sur lequel tournent les disques (36). Des orifices (66) traversant le disque (36) dans sa zone active, qui est la zone opposée au filtre (42), s'opposent à la tendance du disque (36) et du filtre (42) à se rapprocher.

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