Method and apparatus for the filtration of a suspension by a gra

Details Method and apparatus for the filtration of a suspension by a gra Method and apparatus for the filtration of a suspension by a gra

1985-10-03

1988-01-19

Fisher, Richard V.

Liquid purification or separation

Processes

Separating

210139, 210189, 210268, 210274, 210269, 210795, B01D 2310, B01D 2324

Patent

active

047203471

ABSTRACT:
A suspension is filtered by a granular filtrating layer while flowing through the granular filtrating mass as a vertical ascending current. The granular mass is, for the purpose of being washed with air, driven continuously by a compressed air ejector into a tube where it follows an ascending motion and at the outlet of which it is washed with water above the layer where the filtration is carried out. Thereafter, the washed mass is recycled by gravity onto the upper portion of the filtration layer. The charged granular mass which has been subjected to the first or air washing operation is fluidized above the filtration layer and subjected to an extra washing operation with water and pressurized air.

REFERENCES:
patent: 3455819 (1969-07-01), Crits
patent: 3619426 (1971-11-01), Blain et al.
patent: 4197201 (1980-04-01), Hjelmner et al.
patent: 4229292 (1980-10-01), Mori et al.

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