Segregation of binary particles in gas-solid fluidized bed

被引：0
|
作者：
Yu, Yaxiong [1 ]
Lu, Feng [1 ]
He, Xuan [2 ]
Wei, Fei [1 ,3 ]
Zhang, Chenxi [1 ,3 ,4 ]
机构：
[1] Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China
[3] Ordos Lab, Ordos 017010, Peoples R China
[4] Tsinghua Univ, Inst Carbon Neutral, Beijing 100084, Peoples R China
来源：
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING | 2024年 / 18卷 / 06期
基金：
中国国家自然科学基金;
关键词：
fluidized bed; segregation; binary; bubbles; entrainment; MIXTURES; MODEL; VELOCITY; FLOW;
D O I：
10.1007/s11705-024-2426-0
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Particle segregation and mixing behavior play a crucial role in industrial processes. This study investigates the saturated jetsam fraction, which indicates the maximum capacity of flotsam to entrain jetsam, in an initially separated binary fluidized bed with particle size differences. According to the value of saturated jetsam fraction, three distinct regimes-segregation, mixing, and an intermediate regime-are identified. Moreover, intriguing relationships between the saturated jetsam fraction and superficial gas velocity are observed, exhibiting monotonic trends in both the segregation and mixing regimes, while a unique volcano-shaped curve in the intermediate regime. Additionally, a comprehensive entrainment model based on two-fluid model elucidates the observed phenomena, emphasizing the significance of mixing behavior in fluidized layer on the saturated jetsam fraction. This work offers potential insights for evaluating segregation in industrial applications.
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页数：9
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