Title: Automatic control of a filter bed wash process

Abstract: An influent stream is passed through a filter bed separating contained particulate material from the mother liquor; the process being carried out until such time as the filter bed can no longer practically sustain further separation operation. A wash step is then commenced in which a wash liquor is passed through the filter bed, washing soluble components sorbed or deposited on the filter bed or in the filter cake. The concentration of soluble salts in the wash liquor is sensed and when the concentration reaches a predetermined minimum level, the wash liquid flow is stopped for a predetermined period of time. The flow is then resumed for a predetermined minimum time period and if the concentration of soluble salts in the wash liquid is, at the end of said minimum time period, not above a predetermined minimum level, the wash step is terminated. Otherwise, the wash step is intermittantly repeated until such time as the aforenoted termination occurs.

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Inventors: Mantell, Myron (Boonton, NJ, US)

Application Number: 803875
Filing Date: 1977-06-06
Publication_date: 1979-05-15
Assignee:
Primary Class(es): 210/740 210/96.1, 210/138, 210/409
Other Classes:
US Patent Ref:

3078224	Feb, 1963	Schulze et al.	210/82.
3862036	Jan, 1975	Simmons	210/82.
3899421	Aug, 1975	Keilin et al.	210/96.
4045342	Aug, 1977	Kuster et al.	210/81.

Other Refs:
Primary Examiner: Cuchlinski, Jr., William A.
Assistant Examiner:
Attorney: Parker; Sheldon H.