Page 17 - PNEUMATIC AND HYDRAULIC

1.2.3 Absorbance

1. Absorption drying is purely a chemical process.
2. Absorb is to take up a gaseous substance in a solid or liquid substance.

3. A prefilter separates larger drops of water and oil from the compressed air.
4. On entering the device, the compressed air is made to swirl.

5. The drying chamber is filled with a flux (drying agent; urea, calcium

chloride) which extracts the water drops contained in the air.
6. The flux combines with the water and passes into the collection chamber at

the bottom.
7. In the drying chamber, the flux is slowly used up.

8. It must therefore be replaced at regular intervals.

9. The special features of the absorption process are: simple installation of the
equipment low mechanical wear (no moving parts) no external energy

requirement

Figure 1.10: Absorbance drying process.

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