Apparatus and method for automatically controlling the permeabil

Details Apparatus and method for automatically controlling the permeabil Apparatus and method for automatically controlling the permeabil

1992-04-22

1993-08-10

Drodge, Joseph W.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210 86, 210 94, 210143, 210275, 210744, 210745, 210793, B01D 2134

Patent

active

052346005

ABSTRACT:
The present invention comprises apparatus and a method of automatically controlling the permeability of filter beds. In particular, this invention directs itself to filter beds or tanks that are divided into a plurality of contiguous compartments or cells, each compartment containing a filtering media substrate, which substrate is cleansed or backwashed, periodically, when necessary, by a traveling bridge backwash mechanism. The duration and frequency of backwashing is automatically controlled to maintain a desired overall permeability and throughput performance of the filter bed. Permeability control is dynamic to maintain optimum performance under all conditions, i.e. changing in response to fluctuating filter bed hydraulic or solids loading rates.

REFERENCES:
patent: 3239061 (1966-03-01), Horning et al.
patent: 3817378 (1974-06-01), Ross
patent: 4152265 (1979-05-01), Meyers
patent: 4411779 (1983-10-01), McConnell
patent: 4454034 (1984-06-01), Astrom et al.
patent: 4540487 (1985-09-01), Johnson et al.
patent: 4818414 (1989-04-01), Ross
patent: 4885083 (1989-12-01), Banks
patent: 5089117 (1992-02-01), Nichols
Agency Environmental, Inc. Clean Water For Less.TM. 4 pages, Copyright 1991, Hanover, Maryland.

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