Numerical simulation on gas-solid flow during circulating fluidized roasting of bauxite by a computational particle fluid dynamics method  

作　　者：Chengming Xie Rongbin Li Qijin Wei Fengqin Liu Hongliang Zhao Yongmin Zhang Hong Yong Sohn 

机构地区：[1]State Key Laboratory of Green and Low-carbon Metallurgy,University of Science and Technology Beijing,Beijing 100083,China [2]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [3]BGRIMM Technology Group,Beijing 100160,China [4]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China [5]Department of Materials Science and Engineering,The University of Utah,Salt Lake City,UT 84112,USA

出　　处：《Particuology》2024年第7期179-188,共10页颗粒学报（英文版）

基　　金：the National Key Research and Development Program of China(grant No.2022YFC2904401);Guangxi Science and Technology Major Project(grant No.GuiKe AA23023033).

摘　　要：A full-cycle numerical simulation of a circulating fluidized bed(CFB)by the use of the computational particle fluid dynamics(CPFD)method has been developed.The effects of the presence or absence of the secondary air,different secondary air positions,and different secondary air ratios on the gas–solid flow characteristics were explored.The results show that the presence of the secondary air makes a core-annular structure of the velocity distribution of particles in the fluidized bed,which enhances the uniformity of particles’distribution and the stability of fluidization.The position and the ratio of the secondary air have a significant impact on the particle distribution,particle flow rate,and gas flow rate in the fluidized bed.When the secondary air position and ratio are optimal,the particles,particle flow rate,and air flow rate in the CFB are evenly distributed,the gas–solid flow state is good,and the CFB can operate stably.

关 键 词：Circulating fluidized bed CPFD method Secondary air position Secondary air ratio Gas–solid flow characteristics 

分 类 号：O35[理学—流体力学]