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前池是泵站的重要组成部分 ,上游来流经过前池被水泵送往下游。大城市土地资源十分宝贵 ,泵站的占地受到较大限制 ,因此前池往往不得不做成池长较短和扩散角较大 ,这样极易造成前池流态不佳、各水泵配水不均、泵站能耗增加及沉砂淤积。本文通过上海污水治理二期工程SB泵站的水力模型试验研究 ,针对该泵站前池池长短、池底陡、扩散角大的不利情况。提出了在前池增设压水板/导流墩组合导流装置的新技术 ,显著地改善了前池流态和多泵运行配水均匀性 ,从而提高了泵站效率 ,克服了沉砂淤积。这一优化措施已在多个泵站推广应用
The forebay is an important part of the pump station, upstream to flow through the forebay by the pump to the downstream. The land resources of big cities are very valuable, and the occupied area of the pump station is greatly restricted. Therefore, the front pool often has to be made into a short pool length and a large diffusion angle, which can easily lead to a poor flow pattern in the front pool. Both, pumping station energy consumption and sedimentation deposition. In this paper, through the hydraulic model test of SB pumping station of the second phase of Shanghai Sewage Treatment Project, aiming at the unfavorable situation of the former pool length, steep bottom and large diffusion angle of the pump station. The new technology of combined water diversion plate and diversion guide in the forecourt is proposed to improve the uniformity of water flow in the forecourt and the operation of the multi-pump, so as to improve the pumping station efficiency and overcome the sedimentation. This optimization has been applied in many pumping stations