Flow visualization through channels in plate-and-frame modules

doi:10.3969/j.issn.0438-1157.2014.01.009

CIESC Journal ›› 2014, Vol. 65 ›› Issue (1): 71-77.DOI: 10.3969/j.issn.0438-1157.2014.01.009

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Flow visualization through channels in plate-and-frame modules

WANG Tao¹, ZHAN Xia², LI Jiding¹

1 State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
2 School of Food Science Beijing Technology and Business University, Beijing 100048, China

Received:2013-06-28 Revised:2013-10-09 Online:2014-01-05 Published:2014-01-05
Supported by:
supported by the National High Technology Research and Development Program of China (2012AA03A607), the National Natural Science Foundation of China (21176135, 21206001) and the Beijing Foundation (PXM2013_178203_000004，2132010).

平板膜组件内部流体流动状态的可视化

王涛¹, 展侠², 李继定¹

1 清华大学化学工程系, 化学工程联合国家重点实验室, 北京 100084;
2 北京工商大学食品学院, 北京 100048

通讯作者: 李继定
作者简介:王涛（1985-），男，博士研究生。
基金资助:
国家高技术研究发展计划项目（2012AA03A607）；国家自然科学基金项目（21176135，21206001）；北京市项目（PXM2013_ 178203_000004，2132010）。

Abstract

Abstract: A Perspex test cell was made to observe the flow regime directly in plate-and-frame modules under different conditions. The pressure drops in channels with and without spacer were examined. The critical Reynolds number(Re_c) were determined with the correlations for Re and friction factors. The results showed that Re_c in the spacer filled channel was much smaller than that in the empty one, indicating that the turbulence regime was reached at lower fluid velocity. The results were verified through the dye injecting method. Channels with different surface roughness, spacer arrangement and spacer porosity were also investigated. Finally, a laboratory scale spiral-wound module was made and a similar pressure drop situation was obtained, which confirms that the method is also suitable for the spiral-wound modules.

Key words: membranes, plate-and-frame module, spiral-wound module, fluid mechanics, feed-side spacer, visualization, turbulence

摘要： 自行设计了透明的有机玻璃膜组件，用于直接观测组件内部流体流动状态。分别测定了空流道和含有料液隔网流道的压力损失，并根据摩擦因子f随Re值的变化曲线确定了临界Reynolds数（Re_c）的范围。结果表明，含有料液隔网流道的Re_c相比空流道大大减小。利用注射颜料的方法对流体流动情况进行观测，验证了上述结果。随后测定了表面粗糙度、隔网排布形式、孔隙率对流体流动情况的影响。最后，自制小型卷式膜进行测试，结果与平板膜的压力损失情况相符，表明平板膜的实验结果可以用于预测卷式膜的行为。

关键词: 膜, 平板膜, 卷式膜, 流体力学, 料液隔网, 可视化, 湍动

CLC Number:

TQ021.1

WANG Tao, ZHAN Xia, LI Jiding. Flow visualization through channels in plate-and-frame modules[J]. CIESC Journal, 2014, 65(1): 71-77.

王涛, 展侠, 李继定. 平板膜组件内部流体流动状态的可视化[J]. 化工学报, 2014, 65(1): 71-77.

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Flow visualization through channels in plate-and-frame modules

平板膜组件内部流体流动状态的可视化

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