The Labtex ESDTi laboratory-scale spray dryer is a self contained unit designed to produce powders from liquids in seconds.
The unit incorporates everything required for the spray drying process and allows control of inlet temperature, liquid sample flow, drying air flow and compressor pressure.
It is manufactured from high quality materials including 316 stainless steel, PTFE and borosilicate glass 3.3. A compressor is included inside the unit.
Spray drying involves three fundamental processes; liquid atomisation, evaporation and separation/collection of the dried product.
The material to be dried is sprayed into a vertical drying chamber. At the same time, a large volume of hot air is fed into the chamber to evaporate the liquid content of the sample. On completion of drying, the hot air and solids are separated in a glass cyclone.
The most successful drying applications for spray dryers are solutions, slurries and pastes which cannot be dewatered mechanically, are heat sensitive and cannot be exposed to high temperatures for long periods or which contain ultrafine particles that will agglomerate and fuse if dried in any state other than a dilution.
Spray drying is especially applicable to heat sensitive products due to the exceptionally short residence time in the dryer hot zone. Pharmaceuticals, foodstuffs, pigments, dyes and ceramics are all examples of products that have been successfully spray dried.
ESDTi is supplied with CALgrafix Process Monitoring Software. This is designed for applications where there is a requirement to monitor and record temperature data. A real time graphic presentation displays the temperature profile of the process.