Each component of the liquid nitrogen generator has a different role

　　Oxygen and nitrogen gas molecules have different diffusion rates on the surface of the molecular sieve. Gas molecules with a smaller diameter (O2) have a faster diffusion rate, and more enter the pores of the carbon molecular sieve. Gas molecules with a larger diameter (N2) have a diffusion rate. Slower, less pores into the carbon molecular sieve.This selective adsorption difference between nitrogen and oxygen using carbon molecular sieves results in a short period of time when oxygen is enriched in the adsorption phase and nitrogen is enriched in the gas phase. In this way, oxygen and nitrogen are separated, and the gas-phase enrichment nitrogen is obtained under PSA conditions.
　　After a period of time, the molecular sieve adsorbs oxygen to reach equilibrium. According to the different characteristics of the carbon molecular sieve under different pressures to adsorb the adsorbed gas, reducing the pressure causes the carbon molecular sieve to release the oxygen adsorption. This process is regeneration. According to the different regeneration pressure, it can be divided into vacuum regeneration and normal pressure regeneration. Atmospheric pressure regeneration is conducive to the complete regeneration of molecular sieve, easy to obtain high-purity gas.
　　Liquid nitrogen generator is a nitrogen generating equipment designed and manufactured according to pressure swing adsorption technology. Usually two adsorption towers are used in parallel, and the automatic control system strictly controls the timing according to a specific programmable sequence, alternately pressurized adsorption and decompression regeneration, complete the separation of nitrogen and oxygen, and obtain the required high purity nitrogen.
　　Compressed air purification component The compressed air supplied by the air compressor is mainly passed into the compressed air purification component. The compressed air is first removed by the pipeline filter to remove most of the oil, water and dust, and then further removed by the freeze dryer, fine filter Remove oil and dust, and carry out in-depth purification by the superfine filter that follows.According to the working conditions of the system, a set of compressed air degreaser is specially planned to avoid the possible penetration of trace oil and provide sufficient protection for carbon molecular sieve. Plan the air rigorously. The purification components ensure the service life of the carbon molecular sieve. The clean air processed by this component can be used for the surface air.
　　There are two adsorption towers equipped with special carbon molecular sieve in the oxygen-nitrogen separation device. When the clean compressed air enters the inlet end of tower A and moves through carbon molecular sieve to the outlet end, O2, CO2 and H2O are adsorbed by it, and the product nitrogen flows out from the outlet end of the adsorption tower.After a period of time, the carbon molecular sieve in Tower A is saturated with adsorption. At this time, tower A automatically stops adsorption, compressed air flows into tower B for oxygen absorption and nitrogen production, and regenerates the molecular sieve in tower A.
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