Patent ID: 9138666
Filing Date: 2015-09-22
Classification: B01D

Abstract:
1. A filter comprising: at least one pair of flat filter elements, each filter element having an internal face, an external face, a screen, two concentric circular margins, respectively an inner margin and an outer margin between which said screen extends, and radial ribs regularly distributed circumferentially and extending facing one another on either side of said screen and between said concentric margins in order to form sectors on said internal face and on said external face, said at least one pair of filter elements being assembled one against the other so that said facing internal faces define a space that is radially compartmented by the contacting radial ribs of said internal faces, said outer and inner margins having respective passages communicating with corresponding ones of the sectors; parallel distribution columns extending along an axial direction, said parallel distribution columns being separate elements from said at least one pair of filter elements; and a rotary backwashing distributor having an opening, said rotary backwashing distributor being mounted to rotate so that said opening is periodically and selectively put into communication with each distribution column, wherein said parallel distribution columns are embodied by a separate stationary divider arranged coaxially with a stack of said at least one pair of filter elements of said filter, the separate stationary divider having distinct ducts respectively establishing communication between said rotary backwashing distributor and respective passages of the inner margins of the at least one pair of filter elements.