Desilting basin for alternate use in fractional precipitation

Abstract

The invention discloses a desilting basin for alternate use in fractional precipitation. The desilting basin comprises a partition wall, a left desilting basin, a right desilting basin and a gate. Thepartition wall is fixedly arranged at a middle position of a river channel, the left area of the partition wall is the left desilting basin, and the right area of the partition wall is the right desilting basin; a first gate is arranged at the front end of the left desilting basin, and a second gate is arranged at the front end of the right desilting basin; a first-stage desilting basin, a second-stage desilting basin and a third-stage desilting basin are sequentially arranged in the left desilting basin from left to right in order, a first baffle is arranged in the middle of the first-stagedesilting basin and the second-stage desilting basin, a second baffle is arranged in the middle of the second-stage desilting basin and the third-stage desilting basin, and an overflow weir is arranged behind the third-stage desilting basin; and the left desilting basin and the right desilting basin are arranged symmetrically. The desilting basin provided by the invention solves the problem of inconvenient dredging diversion type power stations, silt in river water is deposited and graded according to particles, thus facilitating recycling.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a grit chamber used alternately for graded sedimentation. Background technique [0002] At present, the inland river basin in Hexi originates from the Shule River basin at the western end of the Qilian Mountains. Due to the influence of precipitation conditions and human activities, the sediment content of the Kuolai River and the Shule River has shown a significant increase. Although the existing periodic flushing grit chamber has a simple structure, the flow state of the water flow in the grit chamber is unstable. When the sand concentration is high, the flushing is frequent, resulting in a waste of a lot of water resources, manpower and material resources, and it is necessary to shut down and dewater. However, the continuous flushing desilting basin solves the problem of continuity and coordination between water supply and sand flushing, bu...

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Problems solved by technology

Although the existing periodic flushing grit chamber has a simple structure, the flow state of the water flow in the grit chamber is unstable. When the sand concentration is high, the flushing is frequent, resulting in a waste of a lot of water resources, manpower and material resources, and it is necessary to shut down and dewater. However, the continuous flushing desilting basin solves the problem of continuity and coordination between water supply and sand flushing, but there may be problems such as sand discharge corridors and sand inlet holes being blocked. The sediment that cannot be settled will accelerate the wear of the turbine, and even cause forced shutdown, and the maintenance of the sand discharge corridor is difficult, and the water consumption for sand flushing is large

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