Patent ID: 7926666
Filing Date: 2011-04-19
Classification: B01D

Abstract:
1. A rotary filtration apparatus, comprising: a container having a feed fluid inlet, wherein said container has a side wall, and wherein a bottom plate, a lid, and said side wall define a filtering section, wherein said container has a container base plate that contacts said side wall, and wherein a space is at least partially defined by an upper surface of said container base plate, an inner surface of said side wall, and a lower surface of said bottom plate; a shaft at least partially disposed in said container, said shaft defining a passageway for the transport of permeate, wherein the permeate is transported out of said container through said lid; a disk stack made of a plurality of filtration disks mounted onto said shaft such that rotation of said shaft causes rotation of said filtration disks, wherein said filtration disks have a steel base plate that carries at least one membrane configured to filter a fluid, wherein said disk stack is located between said lid and said bottom plate, wherein feed fluid enters said filtering section through said side wall, and wherein concentrate exits said filtering section through said bottom plate; and a plurality of tie rods that contact both said bottom plate and said lid; wherein the space receives concentrate from said filtering section that passes through said bottom plate, and wherein the space does not receive permeate from the passageway of said shaft; wherein said disk stack, said tie rods, and said bottom plate are located between said container base plate and said lid; wherein said bottom plate has an outer side surface that directly faces said inner surface of said side wall, and wherein said bottom plate defines a recess into which an end of said shaft is located, wherein fluid is prevented from exiting through said bottom plate at said recess.