Article | Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden | Experimental and computational study on the effect of ash deposition on fluid dynamic behavior in a bubbling fluidized bed gasifier Linköping University Electronic Press Conference Proceedings
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Title:
Experimental and computational study on the effect of ash deposition on fluid dynamic behavior in a bubbling fluidized bed gasifier
Author:
Rajan K. Thapa: Department of Process Energy and Environmental Technology, University of Southeastern Norway, Norway Saroj Thapa: Department of Process Energy and Environmental Technology, University of Southeastern Norway, Norway Rajan Jaiswal: Department of Process Energy and Environmental Technology, University of Southeastern Norway, Norway Nora C. I. S. Furuvik: Department of Process Energy and Environmental Technology, University of Southeastern Norway, Norway Britt M. E. Moldestad: Department of Process Energy and Environmental Technology, University of Southeastern Norway, Norway
DOI:
https://doi.org/10.3384/ecp20170170
Download:
Full text (pdf)
Year:
2020
Conference:
Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden
Issue:
170
Article no.:
026
Pages:
170-175
No. of pages:
6
Publication type:
Abstract and Fulltext
Published:
2020-01-24
ISBN:
978-91-7929-897-5
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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The effect of ash deposition on fluid dynamic behavior in a fluidized bed gasification reactor has been studied using experimental and computational methods. The experiments were carried out using sand particles as bed material and air as a fluidizing agent. A 3D computational model has been developed for a bubbling fluidized bed gasification reactor. First, the model was simulated using only sand particles and air. The results are compared with the experimental results. The comparison shows good agreement between the two sets of the results. The model was further used to study the effect of ash accumulation on the fluid dynamic properties of a biomass gasification reactor. The bed material was mixed with 2 and 4vol% of ash and simulated in cold conditions. Pressure drop increases and minimum fluidization velocity decreases with increasing the ash deposition in the bed. The model was also simulated for 2, 4, and 6 vol% of ash at a temperature of 800ºC. The minimum fluidization velocity was decreased in all the cases. The particle species concentration shows the ash particles start to segregate at the minimum fluidization condition and are totally separated at higher velocities. The bubble behavior of the bed is not effected by ash deposition.

Keywords: gasification, fluidized bed, segregation, mixing, CPFD, ash deposition

Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden

Author:
Rajan K. Thapa, Saroj Thapa, Rajan Jaiswal, Nora C. I. S. Furuvik, Britt M. E. Moldestad
Title:
Experimental and computational study on the effect of ash deposition on fluid dynamic behavior in a bubbling fluidized bed gasifier
DOI:
10.3384/ecp20170170
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Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden

Author:
Rajan K. Thapa, Saroj Thapa, Rajan Jaiswal, Nora C. I. S. Furuvik, Britt M. E. Moldestad
Title:
Experimental and computational study on the effect of ash deposition on fluid dynamic behavior in a bubbling fluidized bed gasifier
DOI:
https://doi.org10.3384/ecp20170170
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