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

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

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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 uni-formity of particles'distribution and the stability of fluidization.The position and the ratio of the sec-ondary 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.

Circulating fluidized bedCPFD methodSecondary air positionSecondary air ratioGas-solid flow characteristics

Chengming Xie、Rongbin Li、Qijin Wei、Fengqin Liu、Hongliang Zhao、Yongmin Zhang、Hong Yong Sohn

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State Key Laboratory of Green and Low-carbon Metallurgy,University of Science and Technology Beijing,Beijing 100083,China

School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China

BGRIMM Technology Group,Beijing 100160,China

State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China

Department of Materials Science and Engineering,The University of Utah,Salt Lake City,UT 84112,USA

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National Key Research and Development Program of ChinaGuangxi Science and Technology Major Project

2022YFC2904401GuiKe AA23023033

2024

10.1016/j.partic.2023.12.007

颗粒学报(英文版)
中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD
影响因子：0.632
ISSN：1674-2001
年,卷(期)：2024.90(7)
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