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A platform for research: civil engineering, architecture and urbanism
SAND REMOVAL DEVICE OF SAND SEDIMENTATION POND
To provide a sand removal device effective for further reducing a stop frequency of a sand lifting pump in removal sand.SOLUTION: A sand removal device of a sand sedimentation pond starts operation of a sand lifting pump disposed at a sand collection pit, when a water surface in the sand sedimentation pond becomes predetermined high water level or more. The sand removal device of the sand sedimentation pond makes sediment deposited on a bottom surface of the sand sedimentation pond flow to a main trough, by injecting low pressure water by a nozzle into the bottom surface of the sand sedimentation pond, while keeping the sand sedimentation pond in a draining state. The sand removal device of the sand sedimentation pond stops the operation of the sand lifting pump when the water surface in the sand sedimentation pond becomes predetermined low water level, by pumping up its collected sediment together with water by the sand lifting pump, by further collecting to the sand collection pit. In the sand removal device of the sand sedimentation pond, the predetermined high water level is set between the highest point of the bottom surface of the sand sedimentation pond and the lowest point of the main trough.SELECTED DRAWING: Figure 10
【課題】除砂中の揚砂ポンプの停止頻度をさらに低減させるのに有効な除砂装置を提供する。【解決手段】沈砂池内の水面が所定の高水位以上になったときに集砂ピットに設けた揚砂ポンプの運転を開始し、前記沈砂池を排水状態に保ちつつ、前記沈砂池の底面にノズルにより低圧力水を噴射して前記沈砂池の底面に堆積した土砂を主トラフに流し、さらに集砂ピットに集め、その集めた土砂を前記揚砂ポンプにより水と共に汲み上げ、前記沈砂池内の水面が所定の低水位になったときに前記揚砂ポンプの運転を停止する沈砂池の除砂装置において、前記所定の高水位を前記沈砂池の底面の最高地点と前記主トラフの最低地点との間に設定した。【選択図】図１０
SAND REMOVAL DEVICE OF SAND SEDIMENTATION POND
To provide a sand removal device effective for further reducing a stop frequency of a sand lifting pump in removal sand.SOLUTION: A sand removal device of a sand sedimentation pond starts operation of a sand lifting pump disposed at a sand collection pit, when a water surface in the sand sedimentation pond becomes predetermined high water level or more. The sand removal device of the sand sedimentation pond makes sediment deposited on a bottom surface of the sand sedimentation pond flow to a main trough, by injecting low pressure water by a nozzle into the bottom surface of the sand sedimentation pond, while keeping the sand sedimentation pond in a draining state. The sand removal device of the sand sedimentation pond stops the operation of the sand lifting pump when the water surface in the sand sedimentation pond becomes predetermined low water level, by pumping up its collected sediment together with water by the sand lifting pump, by further collecting to the sand collection pit. In the sand removal device of the sand sedimentation pond, the predetermined high water level is set between the highest point of the bottom surface of the sand sedimentation pond and the lowest point of the main trough.SELECTED DRAWING: Figure 10
【課題】除砂中の揚砂ポンプの停止頻度をさらに低減させるのに有効な除砂装置を提供する。【解決手段】沈砂池内の水面が所定の高水位以上になったときに集砂ピットに設けた揚砂ポンプの運転を開始し、前記沈砂池を排水状態に保ちつつ、前記沈砂池の底面にノズルにより低圧力水を噴射して前記沈砂池の底面に堆積した土砂を主トラフに流し、さらに集砂ピットに集め、その集めた土砂を前記揚砂ポンプにより水と共に汲み上げ、前記沈砂池内の水面が所定の低水位になったときに前記揚砂ポンプの運転を停止する沈砂池の除砂装置において、前記所定の高水位を前記沈砂池の底面の最高地点と前記主トラフの最低地点との間に設定した。【選択図】図１０
SAND REMOVAL DEVICE OF SAND SEDIMENTATION POND
沈砂池の除砂装置
SUZUKI KENJI (author) / KAWAKAMI NAOYA (author)
2019-05-23
Patent
Electronic Resource
Japanese