Air Dryer principle and loading. Everything you want to know is here. Adsorption drying principle, precautions, how to load adsorbent are all here.
Air dryer is through the “pressure change “(pressure swing adsorption principle) to achieve drying effect. Since the capacity of air to hold water vapor is inversely proportional to pressure, a portion of its compressed dry air (‘purged’) depressurizes and expands to atmospheric pressure. Such pressure change makes the expanded compressed air drier, then the dried air flow through the desiccant beds（typical materials used are Xintao molecular sieves and activated alumina), absorbing water and bringing water vapor out of the dryer tower to achieve dehumidification purpose.
The two towers work in circulation.The first dry the incoming compressed air while the second one is being regenerated. Each tower switches tasks when the other tower is completely regenerated. without heat source, and continuously provide dry compressed air to the user’s gas system.
Loading process of adsorption air dryers
Each adsorption dryer tank is designed with molecular sieve feeding inlet (above the tank) and outlet (below the tank),sealed with screw cover.
- First step is equipment pressure reliefby removing tank cover and sealing pad of upper feeding port, and also removing sealing cover of lower discharging port.
- Allow the desiccantsto drain out of the tank, if necessary, manually draw the desiccants out.
- There are filter screens atinlet and outlet of the tank, for purpose of isolating dust impurities. Remove and clean them.
- Followthe original way to install the sealing cover plate of the lower discharge port to ensure tight sealing.
- Add Xintaomolecular sieves into the feeding port until it is completely filled, then install the sealing cover plate to ensure sealing
Due to the initial filling, there is still certain gap among molecular sieves beds which can not be completely filled. Run the device properly for a period of time. Re-open the feeding port, fill Xintao molecular sieve and seal it again.
Tips of loading adsorption air dryers
- Refuse using reworkedproducts, which may easily cause pulverization and seriously affect the equipment operation and working
- Filltightly and void gaps during loading, to prevent pulverization of alumina and molecular sieve due to friction.
- Regularly replace the filter element and supporting accessories, check whether the pipeline is blocked, to prevent pulverizationcaused by the oil and water backflow to the adsorption tower.
- If possible, suggest to fill Xintao inert ceramic balls atthe bottom of the adsorption tower to protecting and supporting alumina and molecular sieve. Or to fill molecular sieves in the middle, both ends filled with alumina.
- The most important is to choose activated alumina and molecular sievesproduced by Xintao manufacturer. Genuine product guarantee, warranty for 2 years, not broken and not pulverization.b
