Hydrodynamic Aspects of Spouted Beds at Elevated Temperatures
作者:
E. R. ALTWICKER,
R. K. N. V. KONDURI,
期刊:
Combustion Science and Technology
(Taylor Available online 1993)
卷期:
Volume 87,
issue 1-6
页码: 173-197
ISSN:0010-2202
年代: 1993
DOI:10.1080/00102209208947214
出版商: Taylor & Francis Group
关键词: Spouted bed;hydrodynamics;effect of combustion temperature;residence lime distribution
数据来源: Taylor
摘要:
A spouted bed was used to study the effect of temperature on hydrodynamic performance, as measured by parameters such as pressure, minimum spouting velocity, and spout-annulus residence time distribution. Three bed temperature regimes were investigated: ambient, preheat (∼200°C. using a small hydrogen pilot flame), and combustion (∼800°C, using a premixed toluene flame). A stable operating regime for the system under combustion conditions was characterized on a plot of gas velocity vs. equivalence ratio. Pressure and temperature profiles in the bed were developed. The effect of temperature on the minimum spouted velocity was evaluated in terms of the minimum spouting Reynolds number, Rems, and the Archimedes number. The effect of particle shape on spout-annulus flow disribution appeared to be greater than the effect of temperature.
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