Pressure swing adsorption nitrogen making machine technology is an advanced gas separation technology. The main principle is: nitrogen diffusivity due to the surface of the microporous gas molecules in the extraction of two oxygen, in the carbon molecular sieve oxygen molecules of different air nitrogen, the smaller diameter of the diffusion rate is faster, more molecular sieve solid (micropores), the larger diameter of the nitrogen molecule diffusion is slow, in the molecular sieve solid (micro) is small, in this way, we get the nitrogen rich gas in the gas phase; In the case of adsorption equilibrium, the air pressure is higher, and the adsorption capacity of carbon molecular sieve is higher. Otherwise, when the pressure is low, the adsorption capacity is smaller.

The industrial operation of the PSA air separation nitrogen plant generally consists of two or more adsorbents, and each adsorber is optimized and cycled to achieve continuous production and nitrogen efficiency. After clean and dry compressed air, the use of compressed oxygen and nitrogen in the air to selectively adsorb carbon molecular sieve nitrogen machine, using dynamic effects, oxygen and nitrogen rate in carbon molecular sieve is greater than the diffusion of micropores, adsorption is unbalanced, nitrogen enrichment in the gas phase, forming a product nitrogen, and then reduced pressure to atmospheric pressure, adsorption, oxygen and other impurities desorption regeneration, achieve, Generally set in two adsorption tower system, one tower produces nitrogen adsorption - desorption regeneration, the other tower, by opening and closing the pneumatic valve, PLC program control, so that the circulation of the two towers, in order to achieve continuous production of high-quality nitrogen, can also be indirect production, start and speed regulation.

The main source of nitrogen machine is the need for compressed air requirements, there is no special control requirements, can continuously produce high-quality, high-purity nitrogen, stable and reliable operation, low cost, many times lower than the cost of buying bottled nitrogen or liquid nitrogen.