This is an improvised version of heatless dryer where purge air loss is very very low due to regeneration is achieved by dry air at low pressure and at high temperature. To achieve this heaters are provided to heat the purge air to around 180 Deg C, which enhances its moisture carrying capacities. This hot purge air at low pressure is passed through the desiccant bed to regenerate with small quantity of purge. Salient Features:- n Saving in purge air loss. n Dew point upto (-) 80 Deg C (atm) can be achieved.

The simplest way of removing moisture from compressed air is to reduce the temperature. In this dryer compressed air is passed through a heat interchanger where cold refrigerant at around 3 Deg C is passed through the other side of the heat interchanger. At this temperature most of the moisture is condensed which is then separated and drained out in moisture separator. Salient Features Simple Non Cyclic operation. Low operating cost. Low Noise. Zero Purge Loss Even lubricated air can be dried Suitable for any capacity PDP of 3 Deg C Electronic C

This is the simplest of all desiccant based air dryers. In this dryer two desiccant towers are used. While one tower is in drying, second tower undergoes regeneration simultaneously. Part of dry air coming out from tower in-line goes for regeneration of the second tower. Tower changeover takes place at every 5 minutes by a sequence controller mounted in control panel. Salient Features:- n Simple operation. n Easy to maintain. n No need of heater or cooler. n Atmospheric dew

In non-lubricated air compressors, great amount of heat is generated which is lost due to cooling in after cooler. In heat of compression type dryer this heat is utilized to heat the air for regeneration. In this dryer hot compressed air is passed through a heater to maintain the temperature around 180 Deg C, which is then passed through the desiccant bed for regeneration. After taking out the moisture this air is cooled in an after cooler where moisture is condensed and drained out in moisture separator. Then this cooled air is passed through the other tower of desiccant for drying.

To save on ENERGY, here part of wet air is circulated through a heater thereby increasing its moisture carrying capacity, which is used for regeneration. In this type of dryer incoming wet air is divided in a distributor. 60-70% of wet air goes for drying while 30-40% of wet air is circulated through a heater thereby increasing its temparature which then takes out the moisture from desiccant bed and then it is cooled in an after cooler where moisture is condensed and drained out in moisture separator. This air is sent back to the distributor where it mixed with incoming air and distributed