Self-cleaning fluid filter system

Details Self-cleaning fluid filter system Self-cleaning fluid filter system

B - Operations, Transporting

01

D

B01D 29/66 (2006.01) B01D 29/15 (2006.01) B01D 35/02 (2006.01) B01D 35/26 (2006.01)

Patent

CA 2477238

A self-cleaning, back-washable filter apparatus (12) and method for use with a pumping apparatus (14) which is lowered into a fluid to be filtered. The filter apparatus (12) includes a filter basket (54) having a manifold (50) with several tubes (38) extending therefrom. A filter element (34) encases at least a portion of the filter basket to block sand or other solid or dissolved particles from entry into the pump intake. Pressurized gas or fluid is directed to the manifold (50) and then through perforations (80) or jets distributed along the length of the tubes (38). Bursts of the pressurized gas are directed from the perforations (80) or jets to the interior of the filter apparatus (12) and then sprayed from the perforations (80) or jets in an outwardly direction against interior surfaces of the filter element (34). Air or fluid bursts from the perforations (80) impinge upon the interior surfaces of the filter (34) and dislodge or expel entrapped particulate material.

L'invention concerne un appareil filtrant à rétrolavage automatique (12) et un procédé pour l'utiliser en association avec un appareil de pompage (14) abaissé dans le fluide à filtrer. L'appareil filtrant (12) comprend un panier-filtre (54) doté d'un collecteur (50) à plusieurs tubes (38) s'étendant à partir du collecteur. Un élément filtrant (34) enferme au moins une partie du panier-filtre pour empêcher le sable ou d'autres solides ou bien des particules dissoutes de pénétrer dans l'entrée de la pompe. Un gaz ou un fluide sous pression est dirigé vers le collecteur (50) et à travers des perforations (80) ou des jets répartis le long des tubes (38). Des projections brusques de gaz sous pression sont envoyées des perforations (80) ou des jets vers l'intérieur de l'appareil filtrant (12) puis elles sont pulvérisées des perforations (80) ou des jets vers l'extérieur, contre des faces intérieures de l'élément filtrant (34). Ces projections brusques d'air ou de fluide partant des perforations (80) ont un impact sur les surfaces intérieures du filtre (34) où elles décollent ou expulsent les particules y étant prisonnières.

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