The air dryer is also called the adsorption dryer. It mainly has two adsorption towers, which alternately carry out adsorption and regeneration processes. The adsorption tower is mainly filled with activated alumina balls and molecular sieve adsorbents.
The adsorption capacity of molecular sieve is higher than the activated alumina balls, so it is also called super adsorbents. The molecular sieves filled in the adsorption tower of the drier are mainly 4A and 13X molecular sieves. The latter's instantaneous adsorption capacity is higher than the former, and the pore size is also larger, so in addition to adsorbing moisture, it can also adsorb carbon dioxide, carbon monoxide, sulfur and other impurities in the air.
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