Filter drum for rotary drum vacuum filter

Claim 1

A rotary drum vacuum filter having a drum mounted for rotation in a slurry tank through a filtration cycle wherein filter cake is formed on the outer surface of the drum by applied vacuum and filtrate is passed through said drum for discharge through filtrate drainage compartments within said drum to a discharge valve assembly, said drum comprising: (a) a pair of conical shaped support members having concentrically arranged interconnected peripheral base portions, (b) a pair of spaced cylindrical end plates havng spaced trunnion housings attached to the outer walls thereof, (c) shaft means in said trunnion housings concentric with said conical shaped support members and interconnecting said end plates to the apex portions of said conical support members, (d) a plurality of filtrate outlets provided in said end plates about said shaft means, (e) a plurality of spaced and parallel triangular shaped divider panels extending longitudinally of and attached to the outer surface of said conical support members in radial relationship thereon, (f) a plurality of rectangular shaped filtration grid sectors each having transverse end portions connected to said opposite end plates and longitudinal side portions connected to a pair of said adjacent divider panels to provide a plurality of said filtrate drainage compartments about the periphery of said drum of said panels, (g) said divider panels configurated to conform to the shape of said conical support member to provide sloped floors to said filtrate drainage compartments within said filter discharge outlets located at the lower end of said sloped floors adjacent the apexes of said support member, and (h) filtrate discharge openings provided in said end plates at said trunnion housings in communication with said filtrate drainage compartments.