Liquid purification or separation – Processes – Separating
Patent
1987-05-15
1989-04-04
Castel, Benoit
Liquid purification or separation
Processes
Separating
210108, 210261, 210262, 210313, 2103232, 21033301, 210411, 210534, B01D 2324, B01D 2938, B01D 3530
Patent
active
048184209
ABSTRACT:
A liquid filtering and backwashing apparatus comprising a filter tank having a first outlet valve and a filter cell disposed within the filter tank is disclosed. The filter cell includes a conduit and an outer member with the outer member spaced apart relative the conduit with a filtering medium positioned between the conduit and the outer member. A plurality of openings in the outer member enable fluid communication between the liquid to be filtered in the filter tank and the filtering medium. The conduit is provided with a plurality of slits to enable fluid communication between the filtering medium and interior of the conduit while retaining the filtering medium external the conduit. A backwash holding tank in fluid communication with the conduit collects the filtered liquid. The backwash holding tank includes a second outlet valve for the filtered liquid to drain. When the filter cell becomes clogged with the filter clogging material the first outlet valve is opened, the second outlet valve is closed, and the backwash holding tank is provided with compressed gas through an inlet valve forcing filtered liquid back into the filter cell and filter tank thereby backwashing the filter cell and filter tank.
REFERENCES:
patent: 545030 (1895-08-01), Wiselogel
patent: 3402818 (1968-09-01), Sasaki
patent: 3627131 (1971-12-01), Goodman
patent: 3637079 (1972-01-01), Strub
patent: 3817378 (1974-06-01), Ross
patent: 3820658 (1974-06-01), Cruze, Jr.
patent: 3864255 (1975-02-01), Swanson
patent: 4282105 (1981-08-01), Crowe
patent: 4405466 (1983-09-01), Giannelli et al.
Castel Benoit
Jordan Richard D.
Uddo Mims International, Inc.
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