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International Journal of Chemical Reactor Engineering

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Influence of Pressure on Fundamental Characteristics in Gas Fluidized Beds of Coarse Particle

Wei Nie
  • State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
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/ Libo Dong
  • State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
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/ Zhenhua Hao
  • State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
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/ Zhonghu Cheng
  • Corresponding author
  • State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
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Published Online: 2018-09-29 | DOI: https://doi.org/10.1515/ijcre-2017-0217

Abstract

Experiments were conducted to investigate fluidization fundamentals of coarse particle using nitrogen as the fluidizing gas at high pressure. The particle under study was falling in Geldart’s group B/D. A 60-mm-dia. cylindrical Perspex model, a two-dimensional jetting fluidized bed, a 200-mm-semicircular jetting fluidized bed and a 200-mm-dia. cylindrical bed were used in the experiments. The fundamentals of high pressure fluidization examined in this study include minimum fluidization velocity and bed expansion. Empirical correlations were developed for determining minimum fluidization velocity and bed expansion. With the same excess fluidizing-gas velocity, bed expansion generally increases with the operating pressure, but the influence of pressure on bed expansion becomes weaker at higher pressure.

Keywords: pressurized fluidized bed; jetting fluidized bed; minimum fluidization velocity; bed expansion

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About the article

Received: 2017-11-09

Accepted: 2018-09-16

Revised: 2018-07-13

Published Online: 2018-09-29


Citation Information: International Journal of Chemical Reactor Engineering, 20170217, ISSN (Online) 1542-6580, DOI: https://doi.org/10.1515/ijcre-2017-0217.

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