LAPSE:2019.0879
Published Article
LAPSE:2019.0879
Comparison of Riser-Simplified, Riser-Only, and Full-Loop Simulations for a Circulating Fluidized Bed
Min Wang, Yingya Wu, Xiaogang Shi, Xingying Lan, Chengxiu Wang, Jinsen Gao
July 31, 2019
With the development of computing power, the simulation of circulating fluidized bed (CFB) has developed from riser-simplified simulation to riser-only simulation, then to full-loop simulation. This paper compared these three methods based on pilot-scale CFB experiment data to find the scope of application of each method. All these simulations, using the Eulerian−Eulerian two-fluid model with the kinetic theory of granular theory, were conducted to simulate a pilot-scale CFB. The hydrodynamics, such as pressure balance, solids holdup distribution, solids velocity distribution, and instantaneous mass flow rates in the riser or CFB system, were investigated in different simulations. By comparing the results from different methods, it was found that riser-simplified simulation is not sufficient to obtain accurate hydrodynamics, especially in higher solids circulating rates. The riser-only simulation is able to make a reasonable prediction of time-averaged behaviors of gas−solids in most parts of riser but the entrance region. Further, the full-loop simulation can not only predict precise results, but also obtain comprehensive details and instantaneous information in the CFB system.
Keywords
circulating-fluidized bed, Computational Fluid Dynamics, full-loop simulation, gas–solids flow, hydrodynamics, riser
Suggested Citation
Wang M, Wu Y, Shi X, Lan X, Wang C, Gao J. Comparison of Riser-Simplified, Riser-Only, and Full-Loop Simulations for a Circulating Fluidized Bed. (2019). LAPSE:2019.0879
Author Affiliations
Wang M: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijng 102249, China
Wu Y: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijng 102249, China
Shi X: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijng 102249, China
Lan X: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijng 102249, China
Wang C: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijng 102249, China
Gao J: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijng 102249, China
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Journal Name
Processes
Volume
7
Issue
5
Article Number
E306
Year
2019
Publication Date
2019-05-22
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7050306, Publication Type: Journal Article
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LAPSE:2019.0879
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doi:10.3390/pr7050306
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Jul 31, 2019
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Jul 31, 2019
 
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Original Submitter
Calvin Tsay
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