Investigations of pressure fluctuation history records of gas–solid fluidized beds

✍ Scribed by S. C. Saxena; B. Waghmare

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 128 KB
• Volume: 24
• Category: Article
• ISSN: 0363-907X
• DOI: 10.1002/(sici)1099-114x(200005)24:6<495::aid-er598>3.0.co;2-2

✦ Synopsis

A transducer pressure probe is devised to measure the pressure-history curves up to a maximum frequency of 200 Hz. It is installed on the wall of a 153 mm #uidized bed and is employed to establish the solids mixing and movement pattern of an air #uidized bed comprising of glass beads of 2093 m average diameter. The pressure variations recorded with a speed of about 11 Hz for a period of 92 s are employed to compute several statistical functions and analysed to infer the quality of #uidization. For the range of #uidization number 1.05}1.48, it is inferred that in this bubbling regime, the solids near the bed wall region descend down while the air bubbles drift to the central region and rise up in the #uidized bed. This bulk macroscopic hydrodynamic picture of solids movement is in conformity with the conclusions of other co-workers.