Patton's PSA Nitrogen Generators

Process Description
Nitrogen generation by Pressure Swing Adsorption (PSA) The Nitrogen generation plant based on the PSA-process (fig. 1) consist of two adsorption towers filled with carbon molecular sieve. Compressed and purified air is passing the adsorption towers. Mainly Oxygen is adsorbed on the carbon molecular sieve and Nitrogen enriched gas is leaving the tower. The Oxygen concentration can be reduced to client’s required purity levels. During adsorption in one tower the second tower is totally regenerated just by depressurization to ambient pressure. The Oxygen enriched off gas with 30-35 vol.-% Oxygen content is vented to the outside atmosphere. After about one minute adsorption in one adsorption tower the process controller is switching over to the second tower and the first one is regenerated.