Patent ID: 6077428
Filing Date: 2000-06-20
Classification: B01D

Abstract:
A filter for the filtration of suspensions, comprising:a container having a longitudinal axis;a shaft extending along said longitudinal axis within the container;a plurality of filter elements stacked one on the other to form a filter pack in said container, each said filter element having a hub coaxially surrounding the shaft, each said hub having a radial outer periphery, each filter element including an annular filter tray having an inner periphery sealingly attached to the radial outer periphery of each said hub, filter media disposed on an upper surface of each said filter tray, each said filter member including an imperforate annular member having a radially inner periphery sealingly attached to the radial outer periphery of the respective hub adjacently below the respective filter tray, each said annular member having a radially outer portion that extends parallel to a lower surface of the respective filter tray, wherein a radially inner portion of each said annular member defines an annular distributor space with the radial outer periphery of the respective hub and with the lower surface of the respective filter tray, and wherein the radial outer portion of each said annular member includes an imperforate annular collar that defines a plurality of separate radial channels with the lower surface of the respective filter tray, wherein said radial channels extend continuously from the annular distributor space to a radial outer periphery of the respective annular member;a plurality of inlet bores extending axially through said hub for a material to be filtered passing axially through the hub; anda plurality of adjacent inflow channels disposed within each said hub, each said inflow channel extending radially outwardly from a respective said inlet bore to the annular distributor chamber and being distributed substantially uniformly in a peripheral direction of the respective hubwherein the annular collar includes a plurality of dividing walls for defining said plurality of radial channels, wherein each said radial channel is configured and arranged to form a concentrated radial liquid jet that is directed radially with respect to said longitudinal axis and substantially parallel to the lower surface of the respective filter tray and the filter media of the adjacent lower filter element, by which the material to be filtered is brought into a space between the lower surface of the respective filter tray and the filter media of the adjacent lower filter element.