文丘里气泡发生器的气泡尺寸及分布

发布时间：2018-02-21 00:28

本文关键词： 鼓泡反应器文丘里气泡发生器微气泡 Sauter平均直径气泡尺寸分布　出处：《浙江大学学报(工学版)》2017年10期 　论文类型：期刊论文

【摘要】：提出使用文丘里气泡发生器的微鼓泡反应器,以空气-水为模拟介质,高速相机为测量手段,考察操作条件和结构参数对文丘里气泡发生器气泡尺寸分布、气泡Sauter平均直径的影响.研究发现,文丘里气泡发生器的气泡Sauter平均直径随着气量的增大而增大,随着液量的增大而减小;当气孔位置位于喉管处时,气泡Sauter平均直径最小;当喉管液速为0.983~2.949m/s时,气泡Sauter平均直径随气孔数量的增加而减小;当喉管液速为3.932~4.915m/s时,气泡Sauter平均直径随气孔数量的增加先减小后略有增大,当开孔数大于6时,气孔数量对气泡Sauter平均直径的影响较小.通过对多组实验的回归分析,提出气泡Sauter平均直径与液相雷诺数、气相雷诺数的经验关联式,计算值与实际值吻合较好.
[Abstract]:A microbubble reactor using Venturi bubble generator was proposed. The bubble size distribution of Venturi bubble generator was investigated by using air-water as simulation medium and high speed camera as measuring means. It is found that the mean diameter of bubble Sauter of Venturi bubble generator increases with the increase of gas flow and decreases with the increase of liquid volume, and the average diameter of bubble Sauter is the smallest when the gas hole is located at the throat. The mean diameter of bubble Sauter decreases with the increase of the number of pores when the liquid velocity of the pipe is 0.983 ~ 2.949 m / s, and the mean diameter of bubble Sauter decreases first and then increases slightly with the increase of the number of pores when the liquid velocity of the pipe is 3.932 ~ 4.915 m / s, and when the number of holes is more than 6:00, the average diameter of bubble Sauter decreases at first and then increases slightly with the increase of the number of pores. The effect of pore number on the average diameter of bubble Sauter is small. The empirical correlation between bubble Sauter mean diameter and liquid phase Reynolds number and gas phase Reynolds number is put forward by regression analysis. The calculated values are in good agreement with the actual values.
【作者单位】：浙江大学化学工程与生物工程学院化学工程联合国家重点实验室;
【基金】：国家自然科学基金资助项目(91434205,21406194) 国家杰出青年科学基金资助项目(21525627) 浙江省自然科学基金资助项目(LR14B060001) 高等学校博士学科点专项科研基金资助项目(20130101110063)
【分类号】：TQ021

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