Increased options for automated fluidized bed
control as Parsum demonstrates its utility
Recent trials have demonstrated that the Parsum inline particle
size analyzer (Malvern Instruments) can be used successfully to
monitor particle growth in a fluidized bed. As part of a joint development
project between Glatt Ingenieurtechnik GmbH, Weimar, and Parsum
GmbH, Chemnitz, 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.
Fluidized 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 analyzers 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
pressurized 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 100oC.
For further details please visit www.malverninstruments.com
or contact:
Malvern Instruments Ltd
Enigma Business Park
Grovewood Road
Malvern
Worcestershire
UK
WR14 1XZ
Tel: +44(0) 1684 892456
Fax: +44(0) 1684 892789
salesinfo@malvern.co.uk
www.malverninstruments.com
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