Yao, X, Zhang, Y, Lu, C et al. (1 more author) (2016) CFD investigation of gas-solids flow in a new fluidized catalyst cooler. Powder Technology, 304. pp. 108-119. ISSN 0032-5910
Abstract
In our previous work, a new concept of annular catalyst cooler (ACC) was proposed and validated experimentally, which showed that an internal circulation of solids could be formed by using two gas distributors and both hydrodynamics and heat transfer could be largely improved. The current work simulated detailed hydrodynamics of gas-solids flow to advance our understanding of the ACC by using the two-fluid model. The influences of effective particle diameter dp⁎ and specularity coefficient φ were examined and compared with experimental data. Optimum values of dp⁎ = 170 μm and φ = 0.3 were determined and used in the simulations. Detailed hydrodynamics of gas-solids flow were then obtained, and the influential parameters were examined. The results showed that the proper selection of the ratio of gas velocities and the position of the heat transfer tube were needed to form a stable internal solids circulation in the ACC. The ACC had a combined hydrodynamic feature of up-flow and down-flow catalyst coolers with bigger solids volume fraction and smaller particle resident time, which are beneficial for improving the heat transfer between solids and wall.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Elsevier B.V. This is an author produced version of a paper published in Powder Technology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Internal circulation; Hydrodynamics; Gas-solids flow; Two fluid model; Catalyst cooler |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Nov 2016 11:10 |
Last Modified: | 14 Aug 2017 06:26 |
Published Version: | https://doi.org/10.1016/j.powtec.2016.08.022 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.powtec.2016.08.022 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:106760 |