Abstract
Time average differential pressure profiles have been recorded at the base of fluidized beds with cross-sectioned areas of 0.375 and 1.5 m 2, both being fitted with uniform resistance gas distributors and containing various materials. For beds of a specific material, with equal ratios of defluidized bed depth/bed width (within the limits 0.375 – 1.5), a common relationship was found between the time average differential pressure difference between the centre and corners at the bed base (expressed as a fraction of total theoretical bed pressure drop at incipient fluidizing conditions) and superficial gas velocity.
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