Liquid purification or separation – Filter – Movable medium
Patent
1986-02-26
1987-09-08
Fisher, Richard V.
Liquid purification or separation
Filter
Movable medium
2104161, 2105101, B01D 3302
Patent
active
046922482
ABSTRACT:
Improved devices for filtration of fluid suspensions that form flow resistant filter cakes, e.g., waste-water treatment sludges, have a cylindrical filter unit mounted for rotation about an approximately horizontal axis. Influent is charged in one end, filter cake forms on an inner rigid filter media surface and discharges at the other end. Pressurized air is applied along a top, longitudinal area and vacuum assist is applied along a bottom longitudinal area of the rotating filter unit. In preferred embodiments, the cylindrical unit is formed of wire spirally wound into a cylinder with spaces therebetween, there are a plurality of spaced apart bars fixed normal to the helical wire on the inner surface and rigid filter media formed of particulate material bonded in a resin matrix fills the cavities between the bars and covers the wire spirals.
REFERENCES:
patent: 1630274 (1927-05-01), North
patent: 1650434 (1927-11-01), Daman
patent: 3349916 (1967-10-01), Magson
patent: 4198299 (1980-04-01), Ewing et al.
patent: 4236999 (1980-12-01), Burgess et al.
patent: 4368125 (1983-01-01), Murray
patent: 4452698 (1984-06-01), Roberts et al.
patent: 4458059 (1984-07-01), Fields
Highstreet Edward J.
Stannard Forrest B.
Fisher Richard V.
Palmer Carroll F.
Peterson Jeffrey W.
The Dehydro Corporation
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