An XCT study on three-dimensional characteristics of a spout-fluid bed

被引：0
|
作者：
Chen, Xi [1 ,2 ]
Xiang, Zhong [1 ,2 ]
Zhong, Wenqi [1 ,2 ]
Heindel, Theodore J. [3 ,4 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing 210096, Peoples R China
[2] Southeast Univ, Inst Sci & Technol Carbon Neutral, Nanjing 210096, Peoples R China
[3] Iowa State Univ, Ctr Multiphase Flow Res & Educ, Ames, IA 50011 USA
[4] Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA
来源：
CHEMICAL ENGINEERING SCIENCE | 2024年 / 295卷
关键词：
Gas-solid flow; Spout-fluid bed; Spouting jet; XCT; Time-averaged void fraction; JET PENETRATION HEIGHT; HYDRODYNAMIC CHARACTERISTICS; FLOW; RECONSTRUCTION; PATTERNS; DEPTH;
D O I：
10.1016/j.ces.2024.120049
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Spout-fluid beds are widely used in the chemical and petrochemical industries for excellent mixing and heat and mass transfer properties. Understanding the behavior of jets in spout-fluid beds is crucial for optimizing these processes. In this paper, we present a novel experimental method for studying the three-dimensional characteristics of jets in spout-fluid beds using X-ray computed tomography. By employing a gas-solid flow parameter measurement system, we propose an accurate experimental fitting method for voxel voidage values, enabling the three-dimensional reconstruction of the time-averaged voidage in the entire flow field of a spout-fluid bed. These data are then used to develop an image processing algorithm for identifying and quantifying gas jets in the flow field, allowing for measures of jet length, volume, and diameter. We further investigate the effects of static bed height, spouting gas velocity, and fluidizing gas flowrate on the three-dimensional characteristics of jets.
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页数：14
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