Airro Engineering Company

Savli, Vadodara, Gujarat

In Todays Industrial zone this compressed air dryer is playing an important role in many applications. Capitalizing on our manufacturing unit we design, manufacture and supply superior quality compressed air dryers & gas drying systems. Our designed Air Dryers is for high-end Industrial applications to provide better protection against condensate damage. As per commercial point of view compressed air dryer are very cost effective and we also offer intelligent energy and Purge loss saving control for all drying processes.

Our Range of Dryer

• Heatless Air Dryer
• Heat Reactivated Dryer
• • Heat Reactivated Dryer

  Working Principle of Heatless Air Dryer

  In Heatless Air Dryer two adsorber towers filled with Activated Alumina / Molecular Sieves to absorb the moisture present in the wet compressed air. Wet incoming compressed air or gas is passed through an adsorber tower where moisture is adsorbs to achieve better dew point.The dry air comes through the top of tower. After some time of operation activated alumina needs regeneration. Reactivation or regeneration of activated alumina is necessary to drive off the adsorbed moisture and to restore its absorptive capacity.This is accomplished via purging the adsorbent by dry air or gas at atmospheric pressure and temperature in reverse direction. The purge loss in around 10% of dry air. Changeover will take place through PLC/timer and continuous dry air will be received at outlet.

Wet incoming compressed air or gas is passed through a desiccant bed; the desiccant adsorbs its moisture. After some time of operation, this desiccant gets saturated and needs regeneration. Reactivation or regeneration of desiccant is then necessary to drive-off the adsorbed moisture and to re-store its original absorptive capacity. This is accomplished via purging the adsorbent by dry air or gas at atmospheric pressure and temperature in reverse direction.

Theory Of Operation In HOC type dryer, hot air at 120 degree celsius to 140 degree celsius from Compressor discharge is directly used for the desiccant regeneration. Running cost of this dryer is virtually NIL. It has two drying towers filled with the Activated alumina or molecular sieve desiccant and they alternate in process every 4-hour automatically. Compressed air directly from air compressor discharge is taken to air dryer inlet through pipelines at 130 degree celsius (Min) temperature. This hot air is passed one drying vessel where saturated desiccant is regenerated by this high temperature air. After picking up moisture from bed, this air is cooled in an intermediate cooler. Here moisture is condensed and removed by an auto drain trap. At 40 degree celsius temperature this air passes through second drying vessel where moisture gets adsorbed and dry air comes out. Cycle time is 4-hours regeneration and 4-hours drying. After 4-hours changeover of vessels takes place. In the regeneration cycle heating of the bed is only for 2-hours and thereafter the bed is cooled by dry air. Dry air is cooled to 40 degree celsius temperature before going out of the air dryer. Due to NIL operating cost, this design is becoming more popular. To utilize full heat energy of compressor discharge, HOC type dryer should be located very close to compressor discharge. These dryers are recommended only for Dew-Point (-) 40 degree celsius and the capacities above 300 Nm3 /hr. In smaller capacity the hot air discharge does not reach 140 degree celsius and hence this design can't be used. Salient Features 1. No loss of compressed air in purge. It is a no purge loss design.2. Maintenance is easy and simple as there are no heaters and no other moving parts except 4- way valves.3. Fully automatic, continuous operation without any attention of operator.4. Negligible operating cost. It neither requires electric power for regeneration nor there do any purge loss of compressed air.