Adsorption Dryer

Adsorption Dryer is another type of dryer used to get rid of water in compressed air. It achieves drying effect by "pressure change" (pressure swing adsorption principle). Because the moisture containing capacity of air is inversely proportional to pressure, part of the dried air decompresses to atmospheric pressure, this pressure changes makes the expanded air gets drier.Then let it pass through adsorption tower which need regeneration, the drying regeneration air extract water, then take the water out of adsorption tower. So adsorption dryer normally are of twin tower construction. One tower dries the air from the compressor while the desiccant in the other tower is being regenerated after the pressure in the tower has been reduced to atmospheric pressure.

There are two types of adsorption dryers: heatless adsorption type, no internal or external heaters are used, and heat adsorption dryer, which need a heater. Compared with Refrigerant Dryer, the advantage of adsorption dryer is its drying performance is beter, but its disadvantage is this kind of dryer consumes compressed air, which makes operation power consumption bigger.