Oxygen Generation Plant
Atmospheric air contains 78% of nitrogen and 21% of oxygen. Oxygen in the PSA method is generated by the physical separation of nitrogen from atmospheric air and lets the oxygen be collected for use. This is done by using a special molecular sieve that has selective adsorption affinity for adsorption of nitrogen molecules and let the oxygen go out. This phenomenon of adsorption of oxygen gas molecules on the adsorbent is under pressure and is known as Pressure
Swing Adsorption i.e P. S. A.
Basic Process Steps:
First, the air compressor sucks the air from the atmosphere and compresses it to a pressure of 5.5 Kg. The air compressor has after-coolers (Water-cooled – depending on the type and choice of compressor) and after-coolers cool the hot compressed air where it gets cooled
and physical moisture is condensed. The physical moisture thus condensed is separated out in the moisture separator where it is thrown out to the atmosphere by an auto drain valve. Next, the cool compressed air is allowed to pass through the filter where the complete dust
and oil contamination is removed. The filtered air now is allowed to pass through an air
dryer where all the moisture is removed – the air dryer can be desiccant or refrigerated-based depending on the site condition, application, and sometimes the customer’s choice.