The effect of low pressure operation on the fluidization quality of Group B powders has been studied. Pressure fluctuations have been analyzed-using the standard deviation, the power spectral density function (PSDF) and the auto- and cross-correlation functions for operating pressure down to 4 kPa. Low pressures were found to lead to slugging behavior at lower gas velocities than predicted using correlations applicable to higher pressure operation. Although the fluidization quality was found to be little affected by small decreases in pressure below the ambient level, quite drastic decrease on the fluidization quality were observed at the approach to the 4 kPa lower limit investigated in this study. (C) 2003 Elsevier B.V. All rights reserved.
The influence of low pressure operation on fluidization quality
JAND, NADER
2003-01-01
Abstract
The effect of low pressure operation on the fluidization quality of Group B powders has been studied. Pressure fluctuations have been analyzed-using the standard deviation, the power spectral density function (PSDF) and the auto- and cross-correlation functions for operating pressure down to 4 kPa. Low pressures were found to lead to slugging behavior at lower gas velocities than predicted using correlations applicable to higher pressure operation. Although the fluidization quality was found to be little affected by small decreases in pressure below the ambient level, quite drastic decrease on the fluidization quality were observed at the approach to the 4 kPa lower limit investigated in this study. (C) 2003 Elsevier B.V. All rights reserved.Pubblicazioni consigliate
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