Differences between Cryogenic Nitrogen Production and PSA Nitrogen Production

Release Time：2019-06-04

　　After passing through an air filter to remove dust and mechanical impurities, the air is compressed to the required pressure in an air compressor. It then undergoes rigorous oil-, water-, and dust-removal purification to produce clean compressed air, thereby ensuring the service life of the molecular sieve in the adsorption towers. There are two adsorption towers equipped with carbon molecular sieves: while one tower is in operation, the other undergoes pressure-reduction desorption.

　　Clean air enters the adsorption tower, where oxygen, carbon dioxide, and water are adsorbed by the molecular sieve. The gas exiting at the outlet is nitrogen, along with trace amounts of argon and oxygen. Meanwhile, in the desorption tower, the oxygen, carbon dioxide, and water that have been adsorbed are desorbed from the micropores of the molecular sieve and released into the atmosphere.

　　In this configuration, the two towers operate in alternating cycles to achieve nitrogen–oxygen separation and provide a continuous supply of nitrogen. The purity of nitrogen produced by pressure swing adsorption typically ranges from 95% to 99.9%; if higher purity is required, additional nitrogen purification equipment must be added.

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The Tongyue pressure swing adsorption nitrogen generator features an adsorber with a unique structural design: this is the core component that determines the utilization rate of the carbon molecular sieve, the nitrogen recovery rate, and whether the carbon molecular sieve will be crushed. Tongyue’s adsorber boasts a distinctive design, incorporating specially structured steel internal components—gas distributors—at both the upper and lower ends inside the adsorber.

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