Product category:
Powder, droplet and particle characterisation
News Release from: Malvern Instruments | Subject: Parsum
Edited by the Processingtalk Editorial
Team on 03 February 2006
Options for automated fluidised bed
control
Recent trials have demonstrated that the Parsum inline particle size analyser from Malvern Instruments can be used successfully to monitor particle growth in a fluidised bed
Recent trials have demonstrated that the Parsum inline particle size analyser from Malvern Instruments can be used successfully to monitor particle growth in a fluidised bed As part of a joint development project between Glatt Ingenieurtechnik , Weimar, and Parsum, Chemnitz, the use of inline particle size measurement was investigated, under various operating conditions
This article was originally published on Processingtalk on 21 Feb 2008 at 8.00am (UK)
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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.
Fluidised bed granulation is a widely used unit operation, particularly in the pharmaceutical, food and speciality chemical industries, but process control is frequently problematic and based on operator experience or trial and error rather than effective monitoring.
Inline analysis and automated control can deliver dramatic efficiency gains and improvements in product quality/consistency; the key is finding analysers that meet the requirements of the application.
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 pressurised air feed ensures that the optical sapphire windows are protected from product build-up - a particularly important feature for potentially fouling applications.
It is suitable for the measurement of particles in the size range 50 to 4000 microns at temperatures in the range minus 20 to +100C. Request a free brochure from Malvern Instruments ...
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