| 摘要 |
A skimming apparatus for a liquid clarification tank that has an inlet for supplying liquid with suspended matter and an outlet for receiving clarified liquid and in which the outlet consists of longitudinally extending transversely spaced weir boxes that receive clarified liquid. The skimming apparatus is supported on a traveling bridge that is reciprocated between extreme positions along a path parallel to the weir boxes and extends transversely of the path of travel. The skimming apparatus consists of first and second portions that are respectively aligned with the weir boxes and the areas between the weir boxes. The first portions of the skimming apparatus are deflectable from a first position to a second position when the bridge traverses the area of the tank occupied by the weir boxes. The skimming apparatus is pivoted between operative and inoperative positions on the bridge and the first portions consist of elements pivoted to adjacent ends of the second portions that are rigid plates. The elements are biased to a first position and have camming members on the free ends for engaging tapered ends on scum baffles surrounding the weir boxes to move the elements from the first position when the bridge traverses the area of the weir boxes. |
