CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model
文献类型：期刊论文
| 作者 | Zhao, Yunlong1,2; Zou, Zheng1,2; Wang, Junwu1,2; Li, Hongzhong1,2; Zhu, Qingshan1,2 |
| 刊名 | CANADIAN JOURNAL OF CHEMICAL ENGINEERING
 |
| 出版日期 | 2020-11-03 |
| 页码 | 12 |
| 关键词 | BFB computational fluid dynamics fluidization residence time distribution scale-up |
| ISSN号 | 0008-4034 |
| DOI | 10.1002/cjce.23882 |
| 英文摘要 | Solids residence time distribution (RTD), which reflects the degree of solids mixing in bubbling fluidized bed (BFB), has become an essential parameter for the evaluation of reactor performances. In this paper, a modified structure-based drag model was established to investigate the effect of the bed size and the correlation of bubble dimension on the gas-solids hydrodynamics and solids RTD in three different scales of BFB. The result obtained from the modified structure-based drag model shows better agreement with the experimental values and it can be used to predict the RTD properly. The deviation of flow field will cause a large difference in the RTD prediction. An accurate flow field is a prerequisite for calculating the RTD. For the cases of Geldart B particles, the Darton correlation is the best choice for low gas velocities. When scaling up a BFB, the RTD calculated by the modified structure-based drag model is reduced in comparison with the experimental value, which is related to the increase of the bed size and the excessive estimation of the bubble size. On the other hand, the lack of consideration for the friction on both front and back walls in 2D simulation may lead to the over-prediction of particle velocity and result in the deviation between calculated and experimental RTD value. |
| WOS关键词 | 2-FLUID MODEL ; FLOW ; SIZE ; PARTICLES ; FREQUENCY ; VERIFICATION ; GELDART |
| 资助项目 | Fund of State Key Laboratory of Multiphase complex systems[MPCS-2019-A-07] ; National Natural Science Foundation of China[21736010] ; National Natural Science Foundation of China[21878304] ; Science Fund for Creative Research Groups[21921005] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000584146300001 |
| 出版者 | WILEY |
| 资助机构 | Fund of State Key Laboratory of Multiphase complex systems ; National Natural Science Foundation of China ; Science Fund for Creative Research Groups |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/42526]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Li, Hongzhong; Zhu, Qingshan |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Yunlong,Zou, Zheng,Wang, Junwu,et al. CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model[J]. CANADIAN JOURNAL OF CHEMICAL ENGINEERING,2020:12. |
| APA | Zhao, Yunlong,Zou, Zheng,Wang, Junwu,Li, Hongzhong,&Zhu, Qingshan.(2020).CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model.CANADIAN JOURNAL OF CHEMICAL ENGINEERING,12. |
| MLA | Zhao, Yunlong,et al."CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model".CANADIAN JOURNAL OF CHEMICAL ENGINEERING (2020):12. |
入库方式： OAI收割
来源：过程工程研究所
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