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TitleAcoustic sensing of solids flow in pneumatic conveying: A development perspective
Publication TypeJournal Article
Year of Publication2001
AuthorsTallon, S., and Davies C.E.
JournalPowder Handling and Processing
Pagination55 - 58
Date Published2001
ISSN09347348 (ISSN)
KeywordsAcoustic wave propagation, Concentration (process), Flow measurement, Flow of solids, Pipe flow, Pneumatic conveying lines, Pneumatic conveyors, slip velocity
AbstractThe solids mass flow rate in dilute phase pneumatic conveying lines can be measured in-line using measurements of axially propagated acoustic signals. The system described here uses the difference in upstream and downstream propagation velocities to determine the gas phase velocity, and acoustic attenuation measurements to determine the solids concentration. The solids mass flow rate can be calculated from the concentration and the gas velocity if an estimate is made of the solids slip velocity. In this work, the errors resulting from an incorrect estimate of the solids slip velocity are investigated and it is shown that the mass flow rate calculation does not depend strongly on the slip velocity used if the system is calibrated against a known mass flow rate or total mass flow of solids. Other advantages and disadvantages of this measurement system are also described.

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