气提式污水泵站供气系统的设计和计算方法探讨

Discussion on Design and Calculation Method of Air Intake System of Air-lifting Wastewater Pumping Station

通过搭建气提式污水泵站试验平台,对气提污水泵在不同通气量下的特性参数进行测试。分析进气管在不同通气速度和扬水管在不同淹没比时的进气压力变化规律,获得了进气管的经济通气速度和通气压力计算方法。不同淹没比扬水管的通气量与扬水量的变化规律表明,应根据淹没水深的变化调节气提污水泵的通气量。对气提污水泵常用的通气量计算公式进行分析探讨,并根据试验数据进一步对其计算值进行验证,结果表明Nicklin公式的计算值与实测值吻合度较高。建议采用Nicklin公式进行通气量计算,并根据最低淹没比选取合理的效率值。

Characteristic parameters of an air-lifting wastewater pump were tested at different air intake volumes by constructing a test platform of an air-lifting wastewater pumping station.The variation pattern of air intake pressure at different intake speeds in the air pipe and different submerged ratios of the lifting pipe was analyzed.Then,the range of economic air intake speed and the calculation formula of air intake pressure of the air pipe were obtained.According to the variations of the air intake volume and water volume of different submerged lifting pipes,the air intake volume of the air-lifting wastewater pump should be adjusted according to the variation of the submerged depth.The calculation formulas of the air volume of the air-lifting wastewater pump were analyzed,and they were further verified according to the test results.The results showed that the calculated values of the Nicklin formula were close to the measured values.It was recommended to use the Nicklin formula for air intake volume calculation and to select a reasonable efficiency value based on the minimum submerged ratio.