Temperature influence on minimum fluidization velocity:Complexity,mechanism,and solutions

作     者：Qingjin Zhang Liangliang Fu Guangwen Xu Dingrong Bai Qingjin Zhang;Liangliang Fu;Guangwen Xu;Dingrong Bai

作者机构：Key Laboratory on Resources Chemicals and Material of Ministry of EducationShenyang University of Chemical TechnologyShenyang 110142China School of Materials Science and EngineeringShenyang University of TechnologyShenyang 110142China School of Chemical EngineeringUniversity of Science and Technology LiaoningAnshan 114051China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2024年第88卷第5期

页      面：344-349页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(grant No.U22A20410). 

主　　题：High-temperature gas-solids fluidized beds Minimum fluidization velocity Hydrodynamic forces Interparticle forces Bed voidage 

摘      要：Fluidized-bed reactors are widely employed in various high-temperature industrial processes.Thus,it is crucial to understand the temperature effect on various fluidization phenomena,specifically the minimum fluidization velocity(U mf)that governs various aspects of fluidized bed behavior.In this study,we comprehensively analyze U mf data from the literature to unravel the complexity and underlying mechanisms of temperature influence on this critical velocity.The research examines experimental data encompassing a wide range of temperatures,pressures,and solid particles.The analysis reveals that the influence of temperature on U mf is fundamentally determined by the relative importance of hydrodynamic forces and interparticle forces within fluidized beds and is realized by three distinctive temperature-induced changes:gas properties,bed voidage,and physiochemical characteristics of particles.On this basis,an equation is derived to enable predictions of temperature influences on the minimum fluidization velocity under broad temperature conditions.