Quantitative Study of the Gas-Solids Flow and Its Heterogeneity/Nonuniformity in a 14 m Two-Dimensional CFB Riser Reactor

Chengxiu Wang, Jiazhi Zhang, Xingying Lan, Jinsen Gao, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)

Abstract

Modeling, design, and operating of circulating fluidized bed (CFB) reactors require quantitative studies on the flow structure and hydrodynamic heterogeneity, which has a significant influence on the process reactions. This study comprehensively investigates the axial and lateral distributions of the solidss concentration with superficial gas velocity of 5-9 m/s and a solidss circulation rate of 100-300 kg/(m2 s) in a pilot CFB reactor of 14 m height. Empirical models are developed based on the above experimental data for both axial and lateral solidss concentrations. The predicted values by the proposed correlations are in good agreement with the experimental data within deviation of 10-20%. An empirical correlation to calculate the radial nonuniformity index (RNI) is proposed to quantify the nonuniformity of the gas-solidss flow. Using the RNI empirical correlation, the flow development can be also calculated quantitatively, showing a good agreement with the results obtained from the data of solidss concentration directly.

Original languageEnglish
Pages (from-to)437-449
Number of pages13
JournalIndustrial and Engineering Chemistry Research
Volume59
Issue number1
DOIs
Publication statusPublished - 8 Jan 2020
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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