| 摘要 |
<p>APPLICATION FOR UNITED STATES PATENT THICKENER CONTROL SYSTEM 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and a flocculant are continually introduced to effect separation of the slurry into a clarified solution which is withdrawn through an overflow launder and a thickened sludge which is transported into a discharge port at the bottom of the unit is controlled by establishing the slime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 flocculant addition in response to small changes in the slurry density.</p> |
