Backwashing filter with increased filtration surface area

Details Backwashing filter with increased filtration surface area Backwashing filter with increased filtration surface area

1995-11-03

1996-12-03

Walker, W. L.

Liquid purification or separation

Plural distinct separators

Filters

210346, 210487, 210488, 55278, B01D 2944

Patent

active

055804543

ABSTRACT:
A backwashable filtration system comprises a plurality of filter cartridges each consisting of a column of stacked arcaded wafers disposed on a rigid geometric guide rod. The wafers have arcuate portions interconnected by straight portions to form a filtration portion. An upper and lower surface of the filtration portion has grooves disposed therein. The filtration portion is connected, via a plurality of tabs, to a mounting portion having an inner hexagonal cavity and a circular exterior. The inner hexagonal cavity is tightly toleranced to fit onto the rigid hexagonal guide rod so as to preclude rotation of the wafers about the rod. The relationship of the inner hexagonal cavity to the outer filtration portion ensures that the arcs will always align to each other and that the grooves on a top surface of a wafer will be offset from grooves on the bottom surface of an opposed wafer. Integral passages accommodate flow of filtrate to a clean chamber and accommodate the flow of backwash fluid through the stack.

REFERENCES:
patent: 3334750 (1967-08-01), Ullman, Jr.
patent: 4686041 (1987-08-01), Van Der Berg et al.
patent: 4726900 (1988-02-01), Keskinen et al.
patent: 4774000 (1988-09-01), Kawai et al.
patent: 5213684 (1993-05-01), Drori
patent: 5296134 (1994-03-01), Zaiter

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