Process Flow Of PSA Nitrogen Making Machine

The air is removed by the air filter dust and mechanical impurities into the air compressor, compressed to the required pressure, after strict oil removal, water removal, dust removal purification treatment, the output of clean compressed air, the purpose is to ensure the service life of the molecular sieve in the adsorption tower. There are two adsorption towers equipped with carbon molecular sieve, one tower is working, the other tower is decompressed desorption. Clean air enters the working adsorption tower, oxygen, carbon dioxide and water are adsorbed by the molecular sieve, and the gas flowing to the outlet end is nitrogen and trace amounts of argon and oxygen. The other tower (desorption tower) removes adsorbed oxygen, carbon dioxide and water from the molecular sieve micropores into the atmosphere. In this way, the two towers take turns to complete the separation of nitrogen and oxygen, and continuously output nitrogen, as shown in Figure -2. The purity of nitrogen obtained by adsorption is 95%-99.9%. If higher purity nitrogen is needed, nitrogen purification equipment should be added. The output of the pressure swing adsorption nitrogen machine 95%-99.9% nitrogen into the nitrogen purification equipment, while adding appropriate amount of hydrogen through the flow meter, in the deaeration tower of the purification equipment hydrogen and nitrogen in the trace oxygen catalytic reaction, to remove oxygen and then cooled by the water condenser, water separator dewater, and then through the dryer depth drying (two adsorption drying towers are used alternately: One adsorption drying to remove water, the other heating desorption drainage), to obtain high purity nitrogen, nitrogen purity at this time up to 99.9995%, see Figure -3. The maximum production capacity of nitrogen production by pressure swing adsorption in sea is 3000m3n/h.