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Title: Hydrodynamics of sawdust and mixtures of wood residues in conical spouted beds

Abstract

It has been proven that conical spouted beds allow for stable operation with sawdust and with wood residues, even with mixtures of these materials of wide particle size range and without being diluted with an inert solid. Peculiar hydrodynamic characteristics for sawdust have been observed; a great hysteresis in the pressure drop vs velocity curve, a pronounced peak of maximum pressure drop, and a difference between the velocity for which spout and fountain are formed and the velocity of the fully spouted bed. From the hydrodynamic study of sawdust, the ranges of the contactor geometric factors (cone angle, inlet diameter/base diameter ratio, inlet diameter/particle diameter ratio) for which operation is stable have been determined. Original correlations for calculation of minimum spouting velocity, of stable operation pressure drop, of maximum pressure drop, and of minimum voidage of complete spouting have been proposed.

Authors:
; ; ;  [1]
  1. Univ. del Pais Vasco, Bilbao (Spain). Dept. de Ingenieria Quimica
Publication Date:
OSTI Identifier:
7111168
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research; (United States)
Additional Journal Information:
Journal Volume: 33:4; Journal Issue: 4; Journal ID: ISSN 0888-5885
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; FLUIDIZED BEDS; HYDRODYNAMICS; PRESSURE DROP; WOOD WASTES; FLUIDIZED-BED COMBUSTION; CONICAL CONFIGURATION; CHEMICAL REACTIONS; COMBUSTION; CONFIGURATION; FLUID MECHANICS; MECHANICS; OXIDATION; SOLID WASTES; THERMOCHEMICAL PROCESSES; WASTES; 092000* - Biomass Fuels- Combustion- (1990-)

Citation Formats

Olazar, M, San Jose, M J, Llamosas, R, and Bilbao, J. Hydrodynamics of sawdust and mixtures of wood residues in conical spouted beds. United States: N. p., 1994. Web. doi:10.1021/ie00028a029.
Olazar, M, San Jose, M J, Llamosas, R, & Bilbao, J. Hydrodynamics of sawdust and mixtures of wood residues in conical spouted beds. United States. https://doi.org/10.1021/ie00028a029
Olazar, M, San Jose, M J, Llamosas, R, and Bilbao, J. Fri . "Hydrodynamics of sawdust and mixtures of wood residues in conical spouted beds". United States. https://doi.org/10.1021/ie00028a029.
@article{osti_7111168,
title = {Hydrodynamics of sawdust and mixtures of wood residues in conical spouted beds},
author = {Olazar, M and San Jose, M J and Llamosas, R and Bilbao, J},
abstractNote = {It has been proven that conical spouted beds allow for stable operation with sawdust and with wood residues, even with mixtures of these materials of wide particle size range and without being diluted with an inert solid. Peculiar hydrodynamic characteristics for sawdust have been observed; a great hysteresis in the pressure drop vs velocity curve, a pronounced peak of maximum pressure drop, and a difference between the velocity for which spout and fountain are formed and the velocity of the fully spouted bed. From the hydrodynamic study of sawdust, the ranges of the contactor geometric factors (cone angle, inlet diameter/base diameter ratio, inlet diameter/particle diameter ratio) for which operation is stable have been determined. Original correlations for calculation of minimum spouting velocity, of stable operation pressure drop, of maximum pressure drop, and of minimum voidage of complete spouting have been proposed.},
doi = {10.1021/ie00028a029},
url = {https://www.osti.gov/biblio/7111168}, journal = {Industrial and Engineering Chemistry Research; (United States)},
issn = {0888-5885},
number = 4,
volume = 33:4,
place = {United States},
year = {1994},
month = {4}
}