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在供水泵站的各种管路附件中,底阀的阻力系数最大。据有关资料介绍:底阀能量损失占进水管能量损失的50～70％,占进出水管总的能量损失的10—50％,泵站扬程越低,所占比例越大。此外,底阀的存在也给泵站的运行管理带来一些麻烦。因此,取消底阀,采用无底阀抽水技术,对节能和方便管理均有利。现就有底阀与无底阀泵水的能耗及效益分析如下。 以彭水县精干麻厂供水站为例。该站水泵型号为200S63A,Q=270米~3/时,H=40米,功率55千瓦,转速2950转/分,输入水管直径200毫米,管长59米,净扬程33米。
In the various piping accessories of the water pumping station, the bottom valve has the largest resistance coefficient. According to relevant information, the energy loss of the bottom valve accounts for 50 to 70% of the energy loss of the inlet pipe, and accounts for 10 to 50% of the total energy loss of the inlet and outlet pipes. The lower the pumping head, the larger the proportion. In addition, the presence of the bottom valve also causes some troubles in the operation and management of the pump station. Therefore, the elimination of the bottom valve and the use of bottomless valve pumping technology are beneficial to energy saving and convenient management. There are now the energy consumption and benefits of bottom valve and bottomless valve pumping as follows. Take Pengshui County Jingma Machang Water Supply Station as an example. The station pump model is 200S63A, Q=270m~3/hr, H=40m, power 55kw, speed 2950 rpm, input water pipe diameter 200mm, pipe length 59m, net lift 33m.