Formation and fluid flow of helical channels liquid-bridge in helical liquid-bridge flow structured packings

被引：0
|
作者：
Han H. [1 ,2 ]
Cong H. [1 ,2 ]
Li H. [1 ,2 ]
Gao X. [1 ,2 ]
Li X. [1 ,2 ]
机构：
[1] School of Chemical Engineering and Technology, National Engineering Research Centre of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin
[2] Zhejiang Institute of Tianjin University, Ningbo
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 02期
关键词：
Fluid flow and tracing; Helical falling film; Liquid-bridge; Structured packing;
D O I：
10.16085/j.issn.1000-6613.2021-0645
中图分类号：
学科分类号：
摘要：
Liquid-bridge is an important feature of helical liquid-bridge flow structured packings. It exists in the helical channels and connects two parallel helical string. However, there are few studies on the formation and fluid flow of liquid bridge in helical channels. To investigate the influence of the different structured parameters of the helical liquid-bridge flow structured packings and liquid load on the liquid-bridge, and the flow behavior of liquid-bridge in the helical channels, the lab-scale fluid flow observation rig was built. Meanwhile, a high-definition camera and high-speed video camera equipped with a macro lens, combing with a particle tracking method, was used to observe the formation, change and flow behavior of the liquid-bridge in the helical channels. The results showed that a stable and continuous liquid-bridge could be formed in different helical channels. The diameter and width of the helical string had little effect on the formation, change and flow behavior of the liquid-bridge. The smaller the helical channels width, the larger the liquid load, the more stable the liquid bridge, but the surface area of the liquid-bridge would decrease. In addition, with the increase of the liquid load, the boundary of the liquid-bridge would change from concave to flat. It could be found by slow-motion of the image that the liquid-bridge spirally descended along the helical string in the helical channels. The present study provides insight into the setting and application of structure parameters of helical liquid-bridge flow structured packings. © 2022, Chemical Industry Press Co., Ltd. All right reserved.
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页码：584 / 592
页数：8
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