Development of an acoustic method for the measurement of mixing and drying in a vibrated fluidized bed

  • Garret Book Western Fluidization Group, Faculty of Engineering, University of Western Ontario, London, Ont. N6A 5B9, Canada
  • Lauren Briens Western Fluidization Group, Faculty of Engineering, University of Western Ontario, London, Ont. N6A 5B9, Canada
  • Cedric Briens Western Fluidization Group, Faculty of Engineering, University of Western Ontario, London, Ont. N6A 5B9, Canada
Keywords: Acoustics, Drying, Fluidization, Microphones, Mixing, Signal processing, Velocity measurement, Fluidization velocity, Gas velocity, Non-invasive acoustic method, Standard deviation

Abstract

A non-invasive acoustic method was developed to detect fluidization regimes, measure mixing and drying in a vibrated fluidized bed. The minimum fluidization and bubbling velocities can be determined from standard deviation of a microphone signal. The standard deviation of the acoustic emissions indicate the amplitude of the acoustic emissions. When the gas velocity is increased above the minimum fluidization velocity, the bed becomes fluidized. Increasing the gas velocity further, the bed becomes well mixed due to the action of the bubbles. The acoustic method can also detect moistures of a few tens of ppms.
Published
2005-09-01
How to Cite
1.
Book G, Briens L, Briens C. Development of an acoustic method for the measurement of mixing and drying in a vibrated fluidized bed. Canadian Acoustics [Internet]. 2005Sep.1 [cited 2019Oct.16];33(3):20-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1725
Section
Proceedings of the Acoustics Week in Canada