Recent trials have demonstrated that the Parsum inline particle size analyzer from Malvern can be used successfully to monitor particle growth in a fluidized bed. As part of a joint development project the use of inline particle size measurement was investigated, under various operating conditions. Complex flow regimes, high humidity and a very broad particle size distribution combine to make the measurement of particles within this environment a significant challenge. In tests involving the monitoring of lactose granulation the Parsum probe tracked particle growth throughout the entire process, generating data that opens up options for automated control. The Parsum is an optical rod probe with no moving elements and measures particle size by detecting interruptions of a laser beam caused by material passing through it. It is insensitive to vibration and slight impacts. Once installed, usually in pipelines, falling zones or vessels, it requires no manual adjustment. An integral pres- surized air feed ensures that the optical sapphire windows are protected from product build-up. It is suitable for the measurement of particles in the size range 50 to 4000 µm.
Hall 5.0, Booth H41
cpp 424
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