Gas sparging in vessels agitated by mixed flow impellers
Gas sparging in vessels agitated by mixed flow impellers
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DOI：
10.1016/0032-5910(96)03099-9
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发表时间：
1996-07
影响因子：
5.2
通讯作者：
D. Birch;N. Ahmed
中科院分区：
文献类型：
--
作者：
D. Birch;N. Ahmed
本文研究了进气位置对上、下抽式45°斜叶圆盘叶轮气体分散性能的影响。在叶轮平面的正下方和正上方使用各种直径的环形分布器。发现分布器的位置强烈地影响着两相分散的充分性和每个Imperaller的曝气功率消耗。对于所研究的布置，发现提供最佳气体分散性能的几何形状对于每个涡轮机是不同的。然而，一个共同的特征是，将气体引入点远离中心并从叶轮进入排出流的分布器构造导致通气速率对功耗的影响减小，并且涡轮机对溢流的敏感性减小，同时仍然提供良好的气体分散。这一观察结果对气液固混合设备的设计具有重要意义。
The influence of the location of gas introduction on the gas dispersion performance of upward and downward pumping 45° pitched blade disc impellers has been studied. Ring spargers of various diameters are used, at positicus both below and above the impeller plane. The adequacy of the two phase dispersion and the aerated power consumption of each imperaller is found to be strongly influenced by the location of the sparger. For the arrangements studied, the geometry that provides the best gas dispersion performance is found to vary for each turbine. One common feature, however, is that the sparger configurations that place the point of gas introduction away from the centre and into the discharge stream from the impeller, result in a reduced influence of the aeration rate on power consumption, and the susceptibility of the turbine to flooding, while still providing good gas dispersion. This observation has important implications for the design of equipment for gas-liquid-solid mixing.