Hydrodynamics in commercial-scale internally circulating fluidized beds with different central downcomer outlets
文献类型：期刊论文
| 作者 | Meng, Zhenliang2,3; Liu, Mengxi3; Ahmad, Nouman2; Wang, Wei1,2 ; Lu, Chunxi3
|
| 刊名 | PARTICUOLOGY
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 51页码:120-131 |
| 关键词 | Internally circulating fluidized bed Downcomer outlet EMMS CFD Particles flow |
| ISSN号 | 1674-2001 |
| DOI | 10.1016/j.partic.2019.09.007 |
| 英文摘要 | Standpipes, or downcomers, are commonly used in fluidized beds to transport particles. The outlet structure of the downcomer greatly affects the performance of flow from it and even overall reactor performance. In this study, the hydrodynamics in commercial-scale internally circulating fluidized beds( ICFBs) with central downcomers having different outlet structures was investigated using computational fluid dynamics simulations with an energy minimization multi-scale drag model. The predicted results closely agreed with experimental data. Results showed that in an ICFB with a downcomer outlet directly open to the bed (model A), nearly 12.7% to 5.4% of the gas in the draft tube bypasses into the downcomer. In the ICFB models B and C with a conic baffle below the downcomer, the gas bypass is significantly weakened or even eliminated when the diameter of the conic baffle is 1.1 times that of the downcomer (model C). In addition, the solids circulation mass flux in ICFBs increased by about 62.5%, from 126.8 kg/(m(2)s) in model A to 206 kg/(m(2)s) in model C. (C) 2019 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. |
| WOS关键词 | GAS-PARTICLE FLOW ; CYCLONE DIPLEGS ; MIXING CHARACTERISTICS ; SOLID FLOW ; LOOP-SEAL ; L-VALVE ; SIMULATION ; STANDPIPE ; BEHAVIOR ; OPERATION |
| 资助项目 | National Natural Science Foundation of China[91534111] ; National Natural Science Foundation of China[91834302] ; National Natural Science Foundation of China[91834303] ; National Natural Science Foundation of China[21625605] ; National Key Basic Research Project (Program 973) of China[2012CB215000] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000524974900013 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Natural Science Foundation of China ; National Key Basic Research Project (Program 973) of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/40080]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Liu, Mengxi; Wang, Wei |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 3.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Zhenliang,Liu, Mengxi,Ahmad, Nouman,et al. Hydrodynamics in commercial-scale internally circulating fluidized beds with different central downcomer outlets[J]. PARTICUOLOGY,2020,51:120-131. |
| APA | Meng, Zhenliang,Liu, Mengxi,Ahmad, Nouman,Wang, Wei,&Lu, Chunxi.(2020).Hydrodynamics in commercial-scale internally circulating fluidized beds with different central downcomer outlets.PARTICUOLOGY,51,120-131. |
| MLA | Meng, Zhenliang,et al."Hydrodynamics in commercial-scale internally circulating fluidized beds with different central downcomer outlets".PARTICUOLOGY 51(2020):120-131. |
入库方式： OAI收割
来源：过程工程研究所
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