文献类型：期刊文献

英文题名：CFD modeling of gas-solid flow in a two-stage jetting fluidized bed with an overflow standpipe

作者：Wang, Zhengyu[1];Wang, Teng[1];Zhou, Meiyu[1];Zhao, Luhaibo[2]

机构：[1]East China Univ Sci & Technol, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

年份：2025

卷号：20

期号：1

外文期刊名：ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20243917098474);WOS:【SCI-EXPANDED(收录号:WOS:001320274800001)】；

基金：Strategic Priority Research Program of the Chinese Academy of Sciences, Grant/Award Number: XDA0390501

语种：英文

外文关键词：CFD simulation; fluidization; gas-solid flow; overflow standpipe; two-stage jetting

摘要：The two-fluid model-kinetic theory of granular flow (TFM-KTGF) model and the sub-grid-scale (SGS) model are used to conduct a three-dimensional numerical simulation study on the hydrodynamic characteristics of a two-stage fluidized bed with an integrated overflow pipe. Using various drag models, the gas-solid flows, bed expansions, pressure drop distributions, and equilibrium conditions in the two-stage bed are compared, and the conditions for the formation of a stable overflow in the two-stage bed are thoroughly investigated. In addition, during the simulation of the secondary distribution in the bed, the porous media model simulates the momentum loss caused by the redistribution plate to avoid the direct simulation of the redistribution plate, which requires extensive grid division work and calculation costs. This work can provide technical direction for the industrialization of one-step coal to multistage fluidized bed natural gas technology.