Backwash method and apparatus

Details Backwash method and apparatus Backwash method and apparatus

1990-10-16

1991-05-21

Morris, Theodore

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

134 34, 134 37, 210332, 21033301, 210791, B08B 900, B01D 2532

Patent

active

050172417

ABSTRACT:
A method and apparatus for cleaning filter elements that are vertically positioned within a filter vessel that has a tube sheet dividing the filter vessel into a lower filter compartment and an upper plenum compartment. A fixed volume of backwash liquid is rapidly directed from the plenum compartment above the tube sheet through the filter elements into the filter compartment that has been drained of liquid. The rapid movement of the backwash liquid is a result of a pressure differential between the plenum compartment and the filter compartment.

REFERENCES:
patent: 3438502 (1969-04-01), Schmidt, Jr. et al.
patent: 3637079 (1972-12-01), Strub
patent: 3744633 (1973-07-01), Schmidt, Jr. et al.
patent: 4405466 (1983-09-01), Giannelli et al.

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