Review on vertical falling film and bubbling flows and their heat transfer mechanisms

被引：0
作者：
Huang X. [1 ]
Wang Y. [1 ]
Yu G. [1 ]
Wang F. [1 ]
机构：
[1] Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2023年 / 37卷 / 03期
关键词：
bubbling flow; coal gasification; scrubbing cooling chamber; vertical falling film;
D O I：
10.3969/j.issn.1003-9015.2023.03.001
中图分类号：
学科分类号：
摘要：
The liquid film fluctuation characteristics of vertical falling film in spray beds within scrubbing cooling chambers, and the flow mechanism of gas passing through liquid pool in bubbling beds are not well studied for coal gasification. In this review, effects of scrubbing cooling ring inlet mode, liquid Reynolds number Rel, gas Reynolds number Reg, descending pipe height and pipe diameter on distribution of thickness and velocity of axial and circumferential liquid film, and heat and mass transfer are summarized in detail. In addition, research status of gas passing through liquid pool in bubbling beds was reviewed, especially gas-liquid entrainment theory, bubble formation theory, gas negative buoyancy jet theory, the structure of internal component bubble breaking plate, and theory of liquid phase physical property effects on gas holdup, two-phase and multiphase flow theory. Finally, feasibility of future scrubbing cooling chamber studies are prospected, which provides suggestions for rational implementation of industrial gasification processes and energy utilization. © 2023 Zhejiang University. All rights reserved.
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页码：333 / 349
页数：16
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