Hydraulics and mass transfer characteristics of novel helical liquid-bridge flow structured packings

被引：9

作者：

Han, Hongming ^{[1
]}

Cong, Haifeng ^{[1
]}

Li, Xingang ^{[1
]}

Li, Hong ^{[1
]}

Gao, Xin ^{[1
]}

机构：

[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Natl Engn Res Ctr Distillat Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2021年 / 240卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Structured packings; Helical liquid-bridge flow; Liquid distribution; Pressure drop; Separation efficiency; FLUID-DYNAMICS; VERTICAL WIRE; 2-PHASE FLOW; HEAT; PERFORMANCE; ABSORPTION; AIR;

D O I：

10.1016/j.ces.2021.116669

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Liquid bridges can be easily formed between two parallel slender plates. In a previous study, we constructed a similar semi-closed "channel" using a helical string and identified a liquid-bridge flow. Thus, the concept of helical liquid-bridge flow-structured packing was developed. Lab-scale fluid flow and distillation experiments were conducted to investigate the hydraulics and mass transfer characteristics, respectively. The test liquid mixtures could form a stable liquid-bridge flow in the channel of the tested helical string, which is the basic element of the novel packings. The structural parameters (width of the channel and diameter of the helical string) considerably affected the loading limit, liquid holdup, and residence time. The results indicate that these novel packings can offer a competitive separation efficiency but considerably lower pressure drop and better self-distribution, compared to commercial structured packings. (c) 2021 Elsevier Ltd. All rights reserved.

引用

页数：8

共 23 条

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