Abstract
Measurements of electrostatic charges and charge distribution on solid particles were made in the freeboard of a fluidized bed. A Faraday cage was designed and built for this purpose. With 30 to 55 μm glass beads, 30 μm particles predominate in the freeboard with an air velocity of 5.5 cm/s. The charge distribution ranges from less than 10 to more than 60 × 10 −15 C. The mean charge was shown to vary with 1.4 power of the particle diameter. A cylindrical probe, 21 mm i.d. and 56 mm long, was used to determine particle concentration via charge collection.
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