| 摘要 |
<p>A thickener for liquids or pulps comprising a tank in which flocculation takes place and dilute liquid is displaced toward the top of the tank, a feedwell having a bottom opening in fluid communication with said tank, conduit means to supply feed liquid to said feedwell, and apertures in said feedwell or said conduit disposed above said bottom opening and positioned to permit the flow of said dilute liquid directly from the tank into the feed liquid for dilution thereof. The thickener preferably comprises a weir plate assembly connected with a side wall of the feedwell adjacent a side opening therein. The weir plate is preferably moveable by means of a float assembly between an open position permitting said dilute liquid to flow from the tank to the feedwell, and a closed position substantially closing the side opening.</p> |
