| 摘要 |
<p>A dewatering system employing a vibrating screen deck is provided with a vacuum chamber positioned beneath the downstream screen of the deck for removing substantial additional amounts of water from a bed of solid particulate material passing along the top surface thereof. The vacuum chamber is provided with an air pump for drawing air out of a vacuum chamber and with a water discharge regulator for sealing the chamber to assure passage of air into the chamber through only the overlying downstream screen panel. The water discharge regulator is a self-operating flexible member comprised essentially of a pair of flat generally rectangular rubber-like sheets arranged in confronting relationship and sealed along opposite edges. The sheets are provided with central reinforcing and stabilizing pads located on opposite sides of the regulator for urging the flat sheets into intimate surface contact to provide a closed sealed condition for accumulating water drawn into the vacuum compartment. The regulator is sufficiently flexible to permit controlled separation of the sheets for discharging the water within the vacuum chamber in response to the amount of water accumulated therein.</p> |
