Liquid Film Characteristics on Surface of Structured Packing

›› 2009, Vol. 17 ›› Issue (1): 47-52.

Liquid Film Characteristics on Surface of Structured Packing

罗淑娟¹, 李怀志², 费维扬¹, 王运东¹

1. The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
2. Laboratoire des Science du Génie Chimique, Nancy-Université, CNRS, 54001. Nancy, France

收稿日期:2008-07-04 修回日期:2008-10-21 出版日期:2009-01-28 发布日期:2009-01-28
通讯作者: FEI Weiyang, E-mail: fwy-dce@tsinghua.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (20070003154);the National High Technology Research and Development Program of China (2006AA05Z316,2006AA030202);the Specialized Research Fund for Doctoral Program of Higher Education of China (20070003154);the Key Program for International Cooperation of Science and Technology,China (2001CB711203)

Liquid Film Characteristics on Surface of Structured Packing

LUO Shujuan¹, LI Huaizhi², FEI Weiyang¹, WANG Yun-dong¹

1. The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
2. Laboratoire des Science du Génie Chimique, Nancy-Université, CNRS, 54001. Nancy, France

Received:2008-07-04 Revised:2008-10-21 Online:2009-01-28 Published:2009-01-28
Supported by:
Supported by the National Natural Science Foundation of China (20070003154);the National High Technology Research and Development Program of China (2006AA05Z316,2006AA030202);the Specialized Research Fund for Doctoral Program of Higher Education of China (20070003154);the Key Program for International Cooperation of Science and Technology,China (2001CB711203)

摘要/Abstract

摘要： Structured packing is a good candidate for CO₂ capture process because of its higher mass transfer efficiency and lower pressure drop.Now,the challenging problem of CO₂ capture and storage demands more and more efficiency equipment.The aim of the present study is to investigate the liquid film characteristics under counter current gas phase and throw some insight into the enhancing mechanism of mass transfer performance in structured packing.A high speed digital camera,non-intrusive measurement technique,was used.Water and air were working fluids.Experiments were carried out for different gas/liquid flow rates and different inclination angles.The time-average and instantaneous film widths for each set of flow parameters were calculated.It is shown that the effects of gas phase could be neglected for lower flow rate,and then,become more pronounced at higher flow rate.According to instantaneous film width,three different stages can be distinguished.One is the constant width of liquid film.The second is the slight decrease of film width and the smooth surface.This kind of character will lead to less interfacial area and deteriorate the packing mass transfer performance.For the third stage,the variation of film width shows clearly chaotic behavior.The prediction model was also developed in present work.The predicted and experimental results are in good agreement.

关键词: counter current, liquid film, two phases, structured packing

Abstract: Structured packing is a good candidate for CO₂ capture process because of its higher mass transfer efficiency and lower pressure drop.Now, the challenging problem of CO₂ capture and storage demands more and more efficiency equipment.The aim of the present study is to investigate the liquid film characteristics under counter current gas phase and throw some insight into the enhancing mechanism of mass transfer performance in structured packing.A high speed digital camera, non-intrusive measurement technique, was used.Water and air were working fluids.Experiments were carried out for different gas/liquid flow rates and different inclination angles.The time-average and instantaneous film widths for each set of flow parameters were calculated.It is shown that the effects of gas phase could be neglected for lower flow rate, and then, become more pronounced at higher flow rate.According to instantaneous film width, three different stages can be distinguished.One is the constant width of liquid film.The second is the slight decrease of film width and the smooth surface.This kind of character will lead to less interfacial area and deteriorate the packing mass transfer performance.For the third stage, the variation of film width shows clearly chaotic behavior.The prediction model was also developed in present work.The predicted and experimental results are in good agreement.

Key words: counter current, liquid film, two phases, structured packing

罗淑娟, 李怀志, 费维扬, 王运东. Liquid Film Characteristics on Surface of Structured Packing[J]. , 2009, 17(1): 47-52.

LUO Shujuan, LI Huaizhi, FEI Weiyang, WANG Yun-dong. Liquid Film Characteristics on Surface of Structured Packing[J]. , 2009, 17(1): 47-52.

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Liquid Film Characteristics on Surface of Structured Packing

Liquid Film Characteristics on Surface of Structured Packing

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