Liquid purification or separation – Plural distinct separators – Filters
Patent
1989-01-27
1990-12-04
Hart, Charles
Liquid purification or separation
Plural distinct separators
Filters
55204, 554591, 2103331, 2103601, 210331, B01D 3315
Patent
active
049751883
ABSTRACT:
A rotating filter apparatus (10) has a stack of porous filter disks (22) attached to a vertical, rotatable hollow shaft (24) and located within a chamber (32), the shaft (24) having a plurality of openings (26) therein to the hollow bore of the shaft (24). Unfiltered fluid is introduced to the chamber (32) under pressure in a tangential entry port (34) in the same direction as disk (22) rotation. Clarified fluid passes through the disks (22) to form a filtrate that flows down the shaft (24), while the unfiltered fluid and the solid particles, or sludge, descend in the chamber (32) to a tapered section (18). Non-fluid transfer and fluid transfer seal assemblies (14, 20) comprise bearings (54, 102, 108), seals, and associated parts upon which the shaft is properly aligned, balanced, and centered. The seal assemblies (14, 20) include seals positioned about the shaft (24) to form a boundary that isolates the bearings (54, 102, 108) from the unfiltered fluid or filtrate. A seal seal coolant is circulated within the non-fluid and fluid transmitting seal assemblies (14, 20) against the seals on the side of boundary opposing the unfiltered fluid, and the pressure of the coolant is maintained above that of the pressure of the fluid in the chamber (32) to prevent transfer of unfiltered fluid across the seal faces at any time. The drive shaft (24) has a coupling (190) which has a male (192) and female (194) interlock for ease of assembly. The tapered section (18) incorporates baffles (196, 198, 199) which promote settling of the sludge in the tapered section (18).
REFERENCES:
patent: 2913068 (1959-11-01), Mistorz et al.
patent: 3204772 (1965-09-01), Ruxton
patent: 3997447 (1976-12-01), Breton et al.
patent: 4455220 (1984-06-01), Parker et al.
patent: 4698156 (1987-10-01), Bumpers
patent: 4717485 (1988-01-01), Brunsell et al.
Brunsell Dennis A.
Ehle John M.
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