Fluidizable device

Details Fluidizable device Fluidizable device

2007-01-16

2007-01-16

Cintins, Ivars C. (Department: 1724)

Liquid purification or separation

Plural chambers with movement of granules therebetween

C210S275000

Reexamination Certificate

active

11053550

ABSTRACT:
A device for the treatment of an influent with a nonbonded media, and when the media becomes spent, the media is fluidized with a backwash fluid. Concentric inner and outer perforated cylinders contain a column of media therebetween. The influent is passed radially inwardly through the column of media and into the lower portion of the inner perforated cylinder, where the effluent is removed from the device. During a backwash operation, a backwash fluid is forced into the lower portion of the inner perforated cylinder, radially outwardly into the column of media to provide an upwardly directed drag force. When the drag force exceeds the buoyant weight of the media, the media is fluidized so that the contaminants can be removed therefrom by the backwash fluid.

REFERENCES:
patent: 1671864 (1928-05-01), Higgins
patent: 3415382 (1968-12-01), Martin
patent: 3458436 (1969-07-01), Martinola et al.
patent: 3568833 (1971-03-01), Ritzen
patent: 4019985 (1977-04-01), Fuller et al.
patent: 4021339 (1977-05-01), Foody
patent: 4643836 (1987-02-01), Schmid

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