首页|Magnetic reduction of gas back-mixing in bubbling fluidized beds with Geldart-B magnetizable particles

Magnetic reduction of gas back-mixing in bubbling fluidized beds with Geldart-B magnetizable particles

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This study investigated the performance of magnetic fields in reducing gas back-mixing in bubbling fluidized beds with Geldart-B magnetizable particles.The Peclet number(Pe)and axial dispersion co-efficient(Da.g)were determined using the one-dimensional dispersion model.A weak magnetic field reduced gas back-mixing to a certain extent,while a moderate field resulted in minimal decrease.The performance of a strong magnetic field varied significantly depending on the operation mode.Under the magnetization-FIRST operation mode,gas back-mixing was significantly reduced.The corresponding Pe and Dag were calculated as~76 and~3.6 x 10-4 m2/s,indicating that the gas flow approached the ideal plug-flow manner.However,when the magnetization-LAST operation mode was used,the strong magnetic field failed to mitigate gas back-mixing.Therefore,the performance of magnetic fields in reducing gas back-mixing depended not only on their intensity but also on their application sequence to the gas flow field.

Magnetized fluidized bedGas back-mixingGas residence time distributionOperation modeAxial dispersion coefficientSteady-state tracing method

Qiang Zhang、Yalong Cao、Wankun Liu、Hao Guan、Donghui Liu、Quanhong Zhu

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College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao,266042,China

2024

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):2024.95(12)