Segregation of binary particles in gas-solid fluidized bed  

作　　者：Yaxiong Yu Feng Lu Xuan He Fei Wei Chenxi Zhang 

机构地区：[1]Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China [2]School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China [3]Ordos Laboratory,Ordos 017010,China [4]Institute for Carbon Neutrality,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Chemical Science and Engineering》2024年第6期113-121,共9页化学科学与工程前沿（英文版）

基　　金：support from the National Natural Science Foundation of China (Grant Nos.22308187,22208186,22278238,and 22238004);the Beijing Nova Program (Grant No.2022118);the Key Research and Development Program of Inner Mongolia and Ordos,and the Ordos-Tsinghua Innovative&Collaborative Research Program in Carbon Neutrality (Ordos Laboratory).

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.

关 键 词：fluidized bed SEGREGATION BINARY BUBBLES ENTRAINMENT 

分 类 号：X701[环境科学与工程—环境工程] TQ424[化学工程] TB383.1[一般工业技术—材料科学与工程]