Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Patent
1990-07-23
1992-11-03
Dawson, Robert A.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
210108, 210111, 210112, 210143, 2103232, 210329, 21033301, 210334, 210342, 210346, 210393, 210408, 210412, 210414, 210415, B01D 2966
Patent
active
051604280
ABSTRACT:
The device is the dual functional filter of the slurry, scraping of the filtered cake, compression the scraped cake and discharging the compressed cake, continuously. The device is composed of both the filter part and the cake compression part. While the filter part is positioned upward holding the filtrate room, the slurry chamber and the filter medium in between, the lower cake compression part contains the screw blade attached to the shaft stationed from the top of the filter part to the end of the cake compression part. The filter cake piled on the filter medium during the filtration of the slurry fed under pressure, is scraped by the scraping blades attached to the shaft or, if necessary, peeled off by the pressure flashings of the back wash liquid through the cake on the filter medium. Precipitated cakes from the above is compressed in the compression part by the screw. The torc controller of the shaft motor and/or other appropriate instruments controls the extent of compression of the cake, by regulating the control valve at the end of the compression part, enabling at the same time to discharge the compressed cake. As the time consumed for even peeling off the heel cake is very small, the filtration can be done in enclosure, automatically and substantially in continuity.
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Dawson Robert A.
Kuri Chemical Engineers, Inc.
Savage Matthew O.
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