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

作　　者：Qingjin Zhang Liangliang Fu Guangwen Xu Dingrong Bai 

机构地区：[1]Key Laboratory on Resources Chemicals and Material of Ministry of Education,Shenyang University of Chemical Technology,Shenyang 110142,China [2]School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110142,China [3]School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China

出　　处：《Particuology》2024年第5期344-349,共6页颗粒学报（英文版）

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

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.

关 键 词：High-temperature gas-solids fluidized beds Minimum fluidization velocity Hydrodynamic forces Interparticle forces Bed voidage 

分 类 号：O35[理学—流体力学]