| 摘要 |
<p>The invention provides an axial flow pump (1) for accurately injecting supernatant liquid (2) from adjacent the liquid surface (3) of a thickening tank (not shown) to dilute liquid in a feedwell (4). The pump (1) includes a cup shaped receiving vessel (5) submerged in the supernatant liquid. The pump also includes a submerged impeller (6) mounted on a rotatable shaft (7) for drawing liquid from the vessel (5) and injecting it into the feedwell (4). The shaft (7) is driven by a motor and associated gearbox (not shown). The pump is responsive to system parameters for adjusting the flow rate of the supernatant liquid.</p> |
