• Mellcon Engineers Private Limited

Heatless Dryer

Mellcon Engineers Pvt Ltd offers a Heatless Dryer, which is easy to operate, reliable, economical and backed by the company’s proven technical competence. Heatless dryers are fully automatic, require negligible power and thus have very low operating cost and high reliability. The heatless dryer consists of two drying towers filled with molecular sieves/activated alumina desiccant. At a given time, one tower is adsorbing while the other is regenerating. Both the towers are inter-connected by valves with piping. At pre-determined time intervals, the towers changeover automatically. The wet air passes upward through the desiccant and drying takes place by adsorption. The moisture level comes into equilibrium and as a result water vapour in the gas stream condenses as a film on the desiccant. The dry air comes out from top having a dew point of (-)40ºC or as designed. While one tower is in drying cycle, the other tower undergoes regeneration. The tower under regeneration is depressurised to atmosphere and some of the dry air from drying tower is passed through this tower, which results desorption of desiccant due to pressure swing. When the regeneration is complete, the purge valve is closed and the tower slowly repressurised to the line pressure for a smooth change over. The drying period of 5 minutes provides an efficient Dew point of (-)40ºC or better. In regeneration approximately 60-90 seconds are required for repressurisation. All the interconnected valves operate automatically by a sequence programmer.