摘要
提水泵站是供水系统中最为重要的环节之一,它能否经济运行一直是人们关注的焦点。以由4台离心式水泵组成的某提水泵站为例,首先确定水泵在工频和变频调速下单泵或多泵并联运行合成的特性曲线拟合方法;其次导出适应水源水位变化的开式系统泵的转速、流量、扬程、效率和能耗的计算公式;再通过算例确定多种变工况下水泵的合理运行台数;其结论纠正了人们对在任何工况下水泵运行台数越少越好的习惯认识,也为多泵供水系统的优化运行提供了参考。
Lift pumping station is one of the most important parts in water supply system, and its economic operation is the focus of attention. A lift pumping station consisted of four centrifugal pumps is taken as an example. First, the fitting method of characteristic curves of single pump or the multiple pumps in parallel was determined when the speed of pumps is adjusted by power frequency or variable frequency control. Next, the design formulas of the speed, flow rate, pump lift, efficiency and energy consumption of the open system pump suitable for changes in source water level were derived. Finally, the number of pumps operated in variable condition was fixed through the example. The wrong cognition that a small number of pumps operated in any condition is better than a large number of ones is corrected. The conclusion provides a reference of the optimized operation of the multi-pump water supply system.
出处
《中国给水排水》
CAS
CSCD
北大核心
2011年第5期43-46,共4页
China Water & Wastewater
关键词
提水泵站
水源水位
水泵并联
特性曲线
变频调速
lift pumping station
source water level
pump parallel
characteristic curve
variable frequency speed regulation
