深水自吸式潜水曝气机的设计与试验  

Design and experiment of deep self-suction submersible aerator

作　　者：陈斌[1,2] 张克危[3] 施卫东[1] 吴钢 黄学军 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]南京市水泵工程技术研究中心,江苏南京211500 [3]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《排灌机械工程学报》2011年第5期437-440,共4页Journal of Drainage and Irrigation Machinery Engineering

基　　金：江苏省企业院士工作站项目(BM2009525)

摘　　要：为了改进自吸式潜水曝气机的深水曝气性能,提高其浸深充氧能力和动力效率,研究了曝气机性能并设计了新的样机.基于潜水曝气机的结构特点及射流原理,在面积比为2.254,.00,5.06和6.25时,分别改变喷嘴形状、喉嘴距、喉管长度、工作压力和流量,进行了大量的试验,得出了不同面积比下的流量比与压力比曲线.在此基础上,拟合了最佳性能曲线,归纳了设计方法.根据要求的流量比和最佳性能曲线,可以查出对应的压力比和面积比,确定出合理的潜水泵工况和曝气机的几何尺寸,据此设计了新的样机,并对其进行了试验.结果表明:该样机将自吸潜水曝气机的最大潜水深度提高到10 m,在此水压头下,水气混合均匀,射流有力,7.5 kW的功率,进气量达到122 m3/h,产生的气泡细密、均匀,在水下滞留的时间长.In order to improve the deep aeration performance of a self-priming submersible aerator and improve its oxygenation capacity and power efficiency in deep diving,a new prototype was designed and its performance was researched.Based on the structural character and jet principle of submersible aerator,a series of tests with various nozzle shapes,throat-pipe length,working pressure and flow rates were conducted under different area ratio value of 2.25,4.00,5.06 and 6.25,respectively.The curve of flow ratio and pressure ratio were obtained and the best performance curve was fitted,by which the basis for the optimal design was identified.Based on flow ratio and the best performance curve,the corresponding pressure ratio and area ratio can be accordingly figured out to determine reasonable working conditions of submersible pump and geometry of aerator.A prototype was designed and tested,and the results showed that the maximum diving depths increased to 10 meters.Under the water pressure of 10 meters,the gas-liquid mixing was uniform,the jet was powerful with P=7.5 kW,and inlet air flow rates reaches 122 m3/h.Fine and even bubbles were developed and had longer residence time.The efficiency of the dissolved oxygen and sewage water treatment was improved,while the tank of aerobic treatment may be appropriate deepen.

关 键 词：潜水射流曝气机 潜水深度 面积比 试验 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]