Many industries, including in particular the pharmaceutical, food, and chemical industries, require a Powder Drier. There are a wide variety of means of achieving this either through a Vacuum Tray Drier, Chemical Drier, Conical Drier, or Fluid Bed Drier. Whatever your specific requirements there is a Powder Dryer to suit your purposes.
For drying of product under normal atmospheric pressure as well as heating,
tempering and sterilisation, PINK offers a series of circulating
air drying
ovens in different versions and product tray quantities.
There are a number of equipment classes which can be used as a Chemical Dryer. Foremost amongst these (and available from Powder Technology Ltd) are the Fluid Bed Drier and Vacuum Tray Dryer.
Charging of the ovens can be accomplished very easily using charging carts. Temperature resistant HEPA filters can be used, when particular requirements for cleanliness are placed on the circulating air.
Standard versions of the Circulating Air Oven are available as detailed below:-
| Version |
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| Temperature Range |
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| Heating Medium |
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| Explosion Proof Version |
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Vacuum processes are normally used to dry products containing
solvents or water-based moisture. However, as not all products are suitable
for drying in a vacuum, a new forced-air dryer with a very high solvent
recovery rate has been developed by PINK for use at atmospheric
pressure.
In contrast to other designs, external recovery allows you to condense, collect and dispose of solvents even if they are potentially explosive.
As with all PINK Circulating Air Drying ovens, a transfer cart
containing the product trays can be used for the easy loading of the oven.
After loading has been completed, the internal chamber of the oven is
purged with inert gas until the explosive concentration falls below the
ignition point. The fans and heater are then turned on, and the drying
process starts.
The gas atmosphere that now contains solvents can be fed to the external condenser in partial flow mode. The condensed vapour is collected in a demister unit and moved to a secure container. Because the system uses a closed cycle, the remaining partial flow is returned to the system.