Desiccant dryer AIRFRESH series

continuousairfiltration

Compressed air is always 100% saturated. When it cools, the moisture will condense, causing damage to the air system. Untreated air with excessive moisture can cause corrosion in pipes and premature failure of pneumatic equipment. A dry compressed air system is essential to maintain the reliability of production processes. Sümer's desiccant dryers produce dry compressed air from 0 oC to -72 oC Celsius pressure dew point in a reliable and energy efficient way while protecting your systems and processes. First, air is compressed up to 7-13 bars with the help of compressors. Filtration takes place thereafter to filter out the condensed water, remaining particles, aerosol and oil which is in the pressurized air stream. Finally, air is supplied into the PSA tanks to remove the moisture in the air. PSA unit consists two tanks filled with Activated Alumina and Zeolites. Each column undergoes cyclic sequence of pressurization, drying and exhaust cycles for continuous flow. Wet air passes directly through the desiccant which adsorbs the moisture. However, the desiccant has a finite capacity for adsorbing moisture, therefore it must be dried out (regenerated). To do this, the tower containing saturated desiccant medium is depressurized and the accumulated water is driven off. Wet (Saturated) compressed air flows upward through the desiccant which adsorbs the moisture, from bottom to top. Dried air from the outlet of the drying tower is expanded to atmospheric pressure and sent through the saturated desiccant, forcing the adsorbed moisture out. After desorption, the blow-off valve is closed and the vessel is re-pressurized.