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

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:
 [1] ; ORCiD logo [2] ;  [2] ;  [1]
  1. REM Engineering Services, PLLC, Morgantown, WV (United States)
  2. National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Publication Date:
Grant/Contract Number:
FE0004000
Type:
Accepted Manuscript
Journal Name:
Particuology
Additional Journal Information:
Journal Volume: 36; Journal Issue: C; Journal ID: ISSN 1674-2001
Research Org:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Spouted bed; Spout-fluidized bed; Minimum spouting velocity; Flat-bottom spouted bed
OSTI Identifier:
1461084