Open Cycle Configuration (Open Loop)
The open-cycle configuration is the most common, simplest and consequently cheaper solution. The air is aspirated from the outside environment, filtered (possibly dehumidified) and heated before entering the drying tower. The separation of the product is made with cyclone and bag filter filter, the gas is then put back into the atmosphere. It is used when there is no risk of explosion due to the material itself or the solvent used, or in the case of environmental problems or degradation of the product if in contact with oxygen sources.
Closed Cycle Configuration (Closed Loop)
- Treatment of toxic substances,
- Formation of potentially explosive mixtures in air,
- Use of flammable organic solvents (e.g. acetone, ethanol, dichloromethane),
- Treatment of products susceptible to oxidation in the presence of air.