Working Principle of Heatless Desiccant Air Dryer
The heatless regenerative air dryer has desiccant with unique micropore, which can absorb water from the air under the capillary action. Meanwhile, the absorbed water can be desorbed under the pressure relief and the afterheat.

The heatless desiccant air dryer generally has the form of “twin tower”, which refers to the two cylinders. One of the cylinders absorbs water and the other desorbs water and regenerate air. The two of them alternately and continuously work in cycle under the program control.

Features of Heatless Desiccant Air Dryer
1. Stable and Consistent Outlet Pressure and Dew Point
(1) The reasonably simplified design of our heatless desiccant air dryer ensures the contact time of the compressed air and the desiccant, which can meet the requirement of the dew point.
(2) The 30% margin of the desiccant can compensate for the ageing or wet desiccant.
(3) The large diffuser of our heatless desiccant air dryer can ensure the uniform airflow through the desiccant layer, eliminating channeling phenomenon.
2. The less loss of the regenerated air
(1) The loss of the regenerated air of our regenerative dryers is less than 14%. Having the excellent cylinder design, our heatless desiccant air dryer can save 95% of the heat of adsorption. The stored heat is used to increase the temperature of the regenerated air in the generation stage, which can improve the regenerative desiccant dryer’s desorption capacity to thoroughly complete the regeneration.
(2) The drying and regeneration adopt the way of reverse convection. The best effect of drying and regeneration appears when the wet air flow through the dry adsorbent.
(3) The amount of regenerated air can be adjusted according to the load demand of the heatless desiccant air dryer.
3.The long lifespan
(1) Our adsorption dryer has the cylinder in suitable size, which facilitates the air to maintain the best flow velocity and time while flowing through the desiccant layer. It also enables the desiccant to give full play.
(2) The reasonable system configuration of desiccant dryer can timely and effectively remove the oil and pollutant from the air before the air entering the cylinder, which can prevent the desiccant from contamination.
4. The heatless desiccant air dryer has adopted the novel pneumatic valve and advanced microcomputer program control, which have the functions of automatic timing and automatic switching. Being stable and reliable, our heatless desiccant air dryer will not be affected by power grid, voltage or electric field.
5. Our heatless desiccant air dryer has easy installation and requires no foundation installation.
6. The scientific and rational design of switching time can guarantee the stable outlet pressure with no fluctuations.

Heatless Desiccant Air Dryer’s Working Conditions and Technical Specifications
Regeneration: no regeneration of heat
Air intake temperature: 20°C-45°C
Oil content of air intake: ≤ 0.1PPM
Working pressure: 0.6 Mpa -1.0Mpa
Pressure loss: ≤ 0.02 Mpa
Pressure dew point: Standard -40°C (-70°C Available)
Regenerated air: ≤ 14%
Desiccant: Activated alumina (As to the product with low dew point, the desiccant is the combination of activated alumina and 5A molecular sieve.)
Working: The two desiccant cylinders work alternately and continuously.
Cycle: T = 10 minutes
Control: automatic microcomputer control
Power supply: 220V/50Hz
Installation: indoors, no foundation (It has no special requirements of the ground.)