International Journal of Fluid Mechanics & Thermal Sciences

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Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler

Received: 31 October 2016    Accepted: 01 December 2016    Published: 30 December 2016
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Abstract

This research deals with the design and analysis of the nozzle and bed materials required for fluidized bed boiler. The design parameters (Diameter of the bed particle, Range of the terminal velocities, Minimum Fluidization /Bubbling velocities, Maximum amplitude and steady velocities) were calculated using Microsoft Excel by interpreting and solving various formulas. Best bed material was selected on the basis of their various characteristics like porosity, adhesive or cohesive properties, resistance to flow etc. An important characteristic change of air distributor velocity with combustion chamber temperature has been established. ANSYS was used as a simulation tool for the analysis. Static Structural solver was used to carry out the strength analysis of the designed wind box. Likewise, computational fluid dynamics (CFD) was carried out using FLUENT solver. Air flow inside the wind box and fluidization phenomena was verified using FLUENT. Furthermore, the designed system was checked for its validity by comparing the results from the Excel sheets and theoretical calculations with simulation results. Lastly, correlation between temperature and velocity inside combustion temperature were determined to identify their relationship with each other.

DOI 10.11648/j.ijfmts.20160204.11
Published in International Journal of Fluid Mechanics & Thermal Sciences (Volume 2, Issue 4, December 2016)
Page(s) 22-36
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

CFD, Fluidization, Fluidized Bed Boiler, Wind Box

References
[1] "Independent Statistics and analysis: Energy Information Administration," 30 may 2013. [Online]. Available: http://www.eia.gov/countries/country-data.cfm?fips=np.
[2] W. Podolski, "Pressurised FBC Technology," 1983.
[3] A. M. Squires, "The story of fluid catalytic cracking, In Circulating Fluidized Bed Technology," Pergamon Press, Toronto, 1986.
[4] J. R. Howard, "Fluidized Beds — Combustion and Applications," 1983, p. 131.
[5] L. Reh, "Circulating Fluidized Bed Technology-VI," in Challenges of circulating fluid bed reactors in energy and raw materials industries, 1999, p. 10–11.
[6] K. Kuhle, "Zement-Kalk-Gips," 1984, pp. 34, 219–225. 4.
[7] Jun Su, "DESIGN AND OPERATION OF CFB BOILERS," 20th Conference on Fluidized Bed Combustion, 2009.
[8] D. M. Considine, Energy Technology Handbook, 1977.
[9] N. Yoshida, K. Yamamoto, T. Iwasaki and lida, "NKK- fluidized bed," 1991, NKK Technical Report.
[10] Feng, Circulating Fluidized Bed Combustion Boiler, Beijing: Electric industrial Press, 2003.
[11] C. Bhasker, "Simulation of air flow in the typical boiler windbox segments," Advances in Engineering Software, 2002.
[12] P. Basu, Combustion and Gasification in Fluidized Beds, Taylor and Francis Group, 2006.
[13] "CFD - Computational Fluid Dynamics," [Online]. Available: http://www.cfd.com.au/.
Author Information
  • Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal

  • Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal

  • Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal

  • Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal

  • Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal

  • Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal

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  • APA Style

    Ishan Kafle, Sajesh Bhochhibhoya, Lokesh Paudel, Pradeep Parajuli, Sojan Prajapati, et al. (2016). Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler. International Journal of Fluid Mechanics & Thermal Sciences, 2(4), 22-36. https://doi.org/10.11648/j.ijfmts.20160204.11

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    ACS Style

    Ishan Kafle; Sajesh Bhochhibhoya; Lokesh Paudel; Pradeep Parajuli; Sojan Prajapati, et al. Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler. Int. J. Fluid Mech. Therm. Sci. 2016, 2(4), 22-36. doi: 10.11648/j.ijfmts.20160204.11

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    AMA Style

    Ishan Kafle, Sajesh Bhochhibhoya, Lokesh Paudel, Pradeep Parajuli, Sojan Prajapati, et al. Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler. Int J Fluid Mech Therm Sci. 2016;2(4):22-36. doi: 10.11648/j.ijfmts.20160204.11

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  • @article{10.11648/j.ijfmts.20160204.11,
      author = {Ishan Kafle and Sajesh Bhochhibhoya and Lokesh Paudel and Pradeep Parajuli and Sojan Prajapati and Pratisthit Lal Shrestha},
      title = {Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler},
      journal = {International Journal of Fluid Mechanics & Thermal Sciences},
      volume = {2},
      number = {4},
      pages = {22-36},
      doi = {10.11648/j.ijfmts.20160204.11},
      url = {https://doi.org/10.11648/j.ijfmts.20160204.11},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ijfmts.20160204.11},
      abstract = {This research deals with the design and analysis of the nozzle and bed materials required for fluidized bed boiler. The design parameters (Diameter of the bed particle, Range of the terminal velocities, Minimum Fluidization /Bubbling velocities, Maximum amplitude and steady velocities) were calculated using Microsoft Excel by interpreting and solving various formulas. Best bed material was selected on the basis of their various characteristics like porosity, adhesive or cohesive properties, resistance to flow etc. An important characteristic change of air distributor velocity with combustion chamber temperature has been established. ANSYS was used as a simulation tool for the analysis. Static Structural solver was used to carry out the strength analysis of the designed wind box. Likewise, computational fluid dynamics (CFD) was carried out using FLUENT solver. Air flow inside the wind box and fluidization phenomena was verified using FLUENT. Furthermore, the designed system was checked for its validity by comparing the results from the Excel sheets and theoretical calculations with simulation results. Lastly, correlation between temperature and velocity inside combustion temperature were determined to identify their relationship with each other.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler
    AU  - Ishan Kafle
    AU  - Sajesh Bhochhibhoya
    AU  - Lokesh Paudel
    AU  - Pradeep Parajuli
    AU  - Sojan Prajapati
    AU  - Pratisthit Lal Shrestha
    Y1  - 2016/12/30
    PY  - 2016
    N1  - https://doi.org/10.11648/j.ijfmts.20160204.11
    DO  - 10.11648/j.ijfmts.20160204.11
    T2  - International Journal of Fluid Mechanics & Thermal Sciences
    JF  - International Journal of Fluid Mechanics & Thermal Sciences
    JO  - International Journal of Fluid Mechanics & Thermal Sciences
    SP  - 22
    EP  - 36
    PB  - Science Publishing Group
    SN  - 2469-8113
    UR  - https://doi.org/10.11648/j.ijfmts.20160204.11
    AB  - This research deals with the design and analysis of the nozzle and bed materials required for fluidized bed boiler. The design parameters (Diameter of the bed particle, Range of the terminal velocities, Minimum Fluidization /Bubbling velocities, Maximum amplitude and steady velocities) were calculated using Microsoft Excel by interpreting and solving various formulas. Best bed material was selected on the basis of their various characteristics like porosity, adhesive or cohesive properties, resistance to flow etc. An important characteristic change of air distributor velocity with combustion chamber temperature has been established. ANSYS was used as a simulation tool for the analysis. Static Structural solver was used to carry out the strength analysis of the designed wind box. Likewise, computational fluid dynamics (CFD) was carried out using FLUENT solver. Air flow inside the wind box and fluidization phenomena was verified using FLUENT. Furthermore, the designed system was checked for its validity by comparing the results from the Excel sheets and theoretical calculations with simulation results. Lastly, correlation between temperature and velocity inside combustion temperature were determined to identify their relationship with each other.
    VL  - 2
    IS  - 4
    ER  - 

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