Liquid purification or separation – Processes – Separating
Patent
1980-11-26
1982-06-08
Adee, John
Liquid purification or separation
Processes
Separating
210798, 210193, 210411, B01D 3702
Patent
active
043338399
ABSTRACT:
A system for filtering liquids, such as coolant liquid from process machinery. The system includes an improved liquid storage tank having a partition dividing the tank into a clean tank for receiving clean liquid from a filter for return to the process machinery, and a dirty tank for receiving process or dirty liquid from process machinery. The storage tank further includes a second partition forming a blowdown chamber and a recirculation chamber below the blowdown chamber, the two chambers being coupled together by a valve which can be opened and closed depending upon the cycle of operation of the system. The recirculation chamber is coupled by a filter pump to the inlet of the filter. The filter has a return line to the clean tank and a blowdown line to the blowdown chamber. The blowdown chamber has a conical bottom and the recirculation chamber has a sidewall provided with tangential inlet ports communicating with the dirty tank. A swirling liquid movement is created in the recirculation chamber when the filter pump is actuated during the pre-coat and filtration cycles of the system in which the valve between the blowdown and recirculation chambers is open. During the initial and final stages of blowdown, the valve is closed and the liquid and particulates from the filter during the blowdown cycles is retained in the blowdown chamber. Since the particulates caused by the blowdown are retained in the blowdown chamber, the particulates cannot enter the dirty tank for possible overflow with dirty liquid into the clean tank. In this way, the clean tank remains free of particulates.
REFERENCES:
patent: 3351551 (1967-11-01), Sines
patent: 3679052 (1972-07-01), Asper
patent: 3935105 (1976-01-01), McEwen
patent: 3957636 (1976-05-01), Arvanitakis
patent: 4277337 (1981-07-01), Zdansky
Cardoza Richard E.
Crowe William D.
Adee John
J. R. Schneider Co. Inc.
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