气固两相穿越液池过程颗粒运动分离可视化实验研究
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摘要
通过可视化实验测量手段,采集气固两相穿越液池过程中固体颗粒运动图像,获得颗粒运动分离规律及其分布特征。实验结果发现:气泡的运动行为对固体颗粒产生推挤、拖曳、夹裹和卷吸作用,对小粒径颗粒的影响尤其明显;气固两相穿越液池的过程中存在着颗粒沉降、气泡尾流拖曳、气泡夹裹扰动、液滴喷淋4个作用区;固体颗粒在液池中的浓度分布受颗粒粒径的影响明显。
The images of solid particles passing through the pool are collected through visual experimental method. The movement laws of particle are obtained by image processing technology. The experimental results show that solid particles are pushed, towed, wrapped and entrained due to bubble movement. The effect of the bubble movement on the smaller particle size is obvious. There are four region area in the process of gas-solid flow passing through the pool particle sedimentation region,bubble wake towed region,bubble wrapping region and droplet spray region. The concentration distribution of solid particles in the pool is evidently influenced by the particle size.
The images of solid particles passing through the pool are collected through visual experimental method. The movement laws of particle are obtained by image processing technology. The experimental results show that solid particles are pushed, towed, wrapped and entrained due to bubble movement. The effect of the bubble movement on the smaller particle size is obvious. There are four region area in the process of gas-solid flow passing through the pool particle sedimentation region,bubble wake towed region,bubble wrapping region and droplet spray region. The concentration distribution of solid particles in the pool is evidently influenced by the particle size.
引文
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