Backwash flushing filter

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 21/24 (2006.01) B01D 24/38 (2006.01) B01D 25/30 (2006.01) B01D 29/88 (2006.01) B01D 33/70 (2006.01) B01D 35/00 (2006.01)

Patent

CA 2547882

An inline backwash, flushing filter assembly comprising a header assembly, a rotatable valve assembly, and a filter element assembly disposed within a filter housing assembly. In operation, the controller moves the turn knob of the rotatable valve assembly a one-quarter turn which results in the reversal of fluid flow through the assembly to periodically back flush the filter utilizing fluid from the system inlet. Debris removed from the filter element during the backwash process is immediately discharged from the system through a drain port. Simultaneously, the hydraulic shearing mechanism of the backwash process dislodges and drains debris which may have accumulated on the screen and at the bottom of the lower filter assembly during normal filter operations. The controller then returns the filter assembly to filtration operation by a reverse one-quarter turn of the turn knob of the rotatable valve assembly.

La présente invention se rapporte à un ensemble filtre à chasse et à lavage à contre-courant en ligne, qui comprend un ensemble collecteur, un ensemble vanne rotative, et un ensemble élément filtre se trouvant dans un ensemble logement de filtre. En cours de fonctionnement, le contrôleur tourne d'un quart de tour le bouton tournant de l'ensemble vanne rotative, ce qui inverse l'écoulement du fluide dans l'ensemble afin de procéder au rinçage périodique du filtre au moyen du fluide issu de l'orifice d'entrée du système. Les débris extraits de l'élément filtre pendant le processus de lavage à contre-courant sont immédiatement éliminés du système par l'intermédiaire d'un orifice de drainage. Simultanément, le mécanisme de cisaillage hydraulique du processus de lavage à contre-courant déloge et draine les débris susceptibles de s'être accumulés sur le maillage et dans le bas de l'ensemble filtre inférieur lors du fonctionnement normal du filtre. Le contrôleur remet ensuite l'ensemble filtre en mode de filtrage en tournant le bouton tournant de l'ensemble vanne rotative d'un quart de tour dans le sens inverse.

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