作　　者： ; ; ; ;

机构地区： 华东化工学院联合化学反应工程研究所

出　　处： 《化学反应工程与工艺》 1989年第3期59-64,共6页

摘　　要： 在三个体积不同的搅拌槽中,用光电毛细管探头法测定了二层桨作用条件下的气泡大小分布,结果表明:搅拌槽底层和顶层桨所对应的作用区域内的气泡大小分布之间无显著差异;搅拌槽内的气泡平均直径在几何相似,单位体积功率和表观气速均保持不变的放大过程中有增大的趋势。 A photoelectric capillary probe technique has been developed to measure the bubblesize distribution in three stirred vessels with two-stage impellers.The working fluids were air and tap water. As far as the Sauter mean diameter of bubbles and its standard variance within the impeller discharge region are concerned,experimental findings showed that no obvious difference between upper and lower impellers can be found. Regarding to the scaleup with constant power input per unit volume and same gas superficial velocity,the Sauter mean diameter of bubbles in the impeller dis- charge region seems to be unchanged,but that in the circulating region it incr- eases explieitly, d_(32R)=1.20×10^(-2)T^(0.11) (Pg/V_L)^(-0.06)W_s^(0.11) Over the operating conditions,the probability density of bubble diameter cor- responds approximately to the normal distribution and the ratio of the standard variance to Sauter mean diameter is as follows. σ_d/d_(32)=0.269T^(-0.09)

关 键 词： 气液分散 搅拌反应器 气泡大小分布

领　　域： [化学工程]