C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/61
C02F 1/52 (2006.01) B01D 21/01 (2006.01) B01D 21/06 (2006.01) B03B 1/04 (2006.01) B03B 5/28 (2006.01) B03B 13/00 (2006.01) C02F 3/12 (2006.01) C02F 11/12 (2006.01)
Patent
CA 1110787
APPLICATION FOR UNITED STATES PATENT THICKENER CONTROL SYSTEM ABSTRACT OF THE DISCLOSURE The operation of a continuous thickener, clarifier, or similar device having a feed well into which a feed slurry of suspended solids and a flocculant are continually introduced to effect separation of the slurry into a clari- fied solution which is withdrawn through an overflow launder and a thickened sludge which is transported into a discharge port at the bottom of the unit is controlled by establishing the slime level at a point near the bottom of the feed well, continuously monitoring the density of the downflowing slurry within the well, and regulating the rate of floccu- lant addition in response to small changes in the slurry density. -1-
313510
Borden Ladner Gervais Llp
Exxon Production Research Company
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