Minimum spouting velocity of flat-base spouted fluid bed

doi:https://doi.org/10.1016/j.partic.2017.02.008

Title: Minimum spouting velocity of flat-base spouted fluid bed

Abstract

Experiments were performed on spout characteristics of a cylindrical spout-fluidized bed (I.D. = 10 cm) with different static heights and two materials (Al ₂O ₃ and high density polyethylene). Results of minimum spouting velocity obtained in this study were compared with reported correlations for both spouted and spout-fluidized beds. Considerable discrepancies were found between the values obtained using different model equations as well as with respect to experimental results. Based on the Mathur–Gishler correlation, a new correlation is proposed for calculating the minimum spouting velocity that introduces the ratio U/U _mf. It was found that the minimum spouting velocity decreases with increasing fluidizing gas velocity (U/U _mf). The pressure drop at the point of minimum spouting velocity is also correlated using this dimensionless group and is presented in this work. Finally, this investigation demonstrates that the use of correlations reported in the literature that focus primarily on conical bottom spouted beds are not applicable to flat-bottom spouted and spout-fluidized beds.

Authors:

Monazam, Esmail R. ^[1];

^[2]; Weber, Justin ^[2]; Layfield, Ky ^[1]

REM Engineering Services, PLLC, Morgantown, WV (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States)

Publication Date:: 2017-07-03

Research Org.:: NETL

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1461084

Alternate Identifier(s):: OSTI ID: 1550444

Report Number(s):: NETL-PUB-20386
Journal ID: ISSN 1674-2001

Grant/Contract Number:: FE0004000

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Particuology

Additional Journal Information:: Journal Volume: 36; Journal Issue: C; Journal ID: ISSN 1674-2001

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Monazam, Esmail R., Breault, Ronald W., Weber, Justin, and Layfield, Ky. Minimum spouting velocity of flat-base spouted fluid bed.  United States: N. p., 2017. 
        Web.  doi:10.1016/j.partic.2017.02.008.

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                    Monazam, Esmail R., Breault, Ronald W., Weber, Justin, & Layfield, Ky. Minimum spouting velocity of flat-base spouted fluid bed.  United States.  https://doi.org/10.1016/j.partic.2017.02.008

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                    Monazam, Esmail R., Breault, Ronald W., Weber, Justin, and Layfield, Ky. Mon .  
        "Minimum spouting velocity of flat-base spouted fluid bed".  United States.  https://doi.org/10.1016/j.partic.2017.02.008.  https://www.osti.gov/servlets/purl/1461084.

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@article{osti_1461084,

  title        = {Minimum spouting velocity of flat-base spouted fluid bed},

  author       = {Monazam, Esmail R. and Breault, Ronald W. and Weber, Justin and Layfield, Ky},

  abstractNote = {Experiments were performed on spout characteristics of a cylindrical spout-fluidized bed (I.D. = 10 cm) with different static heights and two materials (Al2O3 and high density polyethylene). Results of minimum spouting velocity obtained in this study were compared with reported correlations for both spouted and spout-fluidized beds. Considerable discrepancies were found between the values obtained using different model equations as well as with respect to experimental results. Based on the Mathur–Gishler correlation, a new correlation is proposed for calculating the minimum spouting velocity that introduces the ratio U/Umf. It was found that the minimum spouting velocity decreases with increasing fluidizing gas velocity (U/Umf). The pressure drop at the point of minimum spouting velocity is also correlated using this dimensionless group and is presented in this work. Finally, this investigation demonstrates that the use of correlations reported in the literature that focus primarily on conical bottom spouted beds are not applicable to flat-bottom spouted and spout-fluidized beds.},

  doi          = {10.1016/j.partic.2017.02.008},

  url          = {https://www.osti.gov/biblio/1461084},
  journal      = {Particuology},

  issn         = {1674-2001},

  number       = C,

  volume       = 36,

  place        = {United States},

  year         = {2017},

  month        = {7}

}

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Journal Article:

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https://doi.org/10.1016/j.partic.2017.02.008

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Cited by: 3 works

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Figures / Tables:

Table 1: Spouted and Spout-Fluidized Experimental Conditions

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

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