In the air compressor, a compressed air dryer needs to be installed at the outlet of the compressor to reduce its water content. If the water content is too high, it may directly affect the normal operation of the pneumatic equipment, and in severe cases, it may lead to shutdown of production. The working analysis of the adsorption dryer is described in detail below.

Compressed air dryers mainly use adsorption dryers and refrigerated dryers. Because refrigerated dryers use refrigeration technology, the pipeline is prone to ice blockage. Therefore, the pressure dew point of refrigerated drying can only reach above 2 °C, while Adsorption dryers are the choice when dry air with a pressure dew point below -20°C is required.

Adsorption dryer is a commonly used dryer equipment in industry. The adsorbents used are mainly silica gel, aluminum glue and molecular sieve. These adsorbents have a large number of pores, so they have a large specific surface area. When the surface water vapor partial pressure of the adsorbent material is less than the water vapor surface partial pressure of the air, the moisture in the compressed air is adsorbed. However, when the adsorbent adsorbs enough water and the adsorbent is saturated, it needs to be desorbed and regenerated before it can be adsorbed again, so that the dryer can work continuously. Therefore, the adsorption dryer generally has two towers, one tower is in the working pressure state, the air is adsorbed and dried, and the other tower is desorbed and regenerated under normal pressure. Therefore, the two towers are dry and regenerated under the control of the electric controller, and work alternately to continuously provide dry compressed air.