Liquid purification or separation – Filter – Movable medium
Patent
1989-11-20
1990-08-14
Jones, W. Gary
Liquid purification or separation
Filter
Movable medium
210401, 2104165, B01D 33056
Patent
active
049485024
ABSTRACT:
An apparatus for filtering industrial processing liquids is disclosed which includes a tank, a continuous conveyor screen positioned in and defining a loop in the tank, and a continuous filter media placed on an outer surface of the conveyor. The apparatus includes a power operated tractor chain sludge elevator guidably mounted within the tank extending along and frictionally engaging an outer surface return portion of the filter media for effecting a positive upward lift movement of adjacent portions of the filter media with accumulated sludge thereon. The apparatus may also include an apertured horizontal partition in the tank, the filter media sealed over the aperture defining a filtered liquid reservoir chamber positioned below the partition and an unfiltered liquid chamber above the partition, an opened-top vacuum chamber sealed to the filter media and immersed within the filtered liquid chamber positioned within the aperture so as to form a peripheral channel between the aperture and vacuum chamber. An alternate embodiment of the invention includes an open top vacuum chamber with an unfiltered reservoir, a continuous sealing channel upon and surrounding the vacuum chamber, a filter media within the unfiltered reservoir and extending over and sealingly engaging the channel, the channel having a continuous slot in its top defining inner and outer sealing surfaces engaging the filter media. The channel in either embodiment may be connected to a positive or negative pressure source for discouraging the flow of unfiltered liquid into the vacuum chamber.
REFERENCES:
patent: 3087620 (1963-04-01), Hirs
patent: 3091336 (1963-05-01), Hirs
patent: 3221885 (1965-12-01), Hirs
patent: 3404779 (1968-10-01), Weathers
patent: 4650571 (1987-03-01), Anderson
Gossett Dykema
H. R. Black Company, Inc.
Jones W. Gary
Savage Matthew O.
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