Liquid purification or separation – Processes – Separating
Patent
1987-09-08
1989-02-14
Fisher, Richard V.
Liquid purification or separation
Processes
Separating
210350, 210357, 210384, 210388, 2104971, 55293, 55304, B01D 2938
Patent
active
048044814
ABSTRACT:
In the filter according to the invention (precoated filter), gap-type filter elements (11) designed in the manner of filter cartridges and consisting of a profile wire wound into a helical spring are used. In order to detach the adhering filter cake, the gap-type filter element (11) is stretched in its axial direction, with the filter gaps being opened at the same time, this appropriately being carried out be means of a stretching drive which at the same time can be designed as a vibratory drive. The gap-type filter elements are at the same time made to vibrate, and this can be obtained by means of periodic stretching and shortening or by making the stretched gap-type filter elements vibrate. The vibratory movement is appropriately executed at a frequency matching the natural frequency of the gap-type filter elements.
REFERENCES:
patent: 2642186 (1953-06-01), Garland et al.
patent: 3487931 (1970-01-01), Paulson
patent: 3870640 (1975-03-01), Reece
patent: 3937281 (1976-02-01), Harnsberger
patent: 4199454 (1980-04-01), Sarture
patent: 4237978 (1980-12-01), Calderon
Boll & Kirch Filterbau GmbH
Fisher Richard V.
Millard Wanda L.
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