Pressure change adsorption nitrogen machine to carbon molecular sieve as adsorbent, using pressure adsorption and decompression desorption principle from the air adsorption and release of oxygen, so as to separate nitrogen gas. Automation equipment.
Carbon molecular sieve is coal as the main raw material, by grinding, oxidation, molding, carbonization, special hole processing technology processing and become a surface and internal are with microporous columnar particles adsorbent. black
The pore size distribution of carbon molecular sieve enables dynamic separation of O2 and N2. This pore size distribution allows different gases to diffuse into the pores of the molecular sieve at different rates without repelling any gases (air) from the mixture.
The effect of carbon molecular sieves on the separation of O2 and N2 is based on subtle differences in the dynamic diameters of the two gases. The dynamic diameter of O2 molecule is small, so it diffuses faster in the micropores of carbon molecular sieve. The kinetic diameter of N2 molecule is large, so the diffusion rate is slow. The diffusion of water and CO2 in compressed air differs little from that of oxygen, while the diffusion of argon is slower. The mixture of N2 and Ar is eventually enriched from the adsorption column.
The increase of adsorption pressure can increase the adsorption capacity of O2 and N2 at the same time, and the increase of O2 adsorption capacity is larger. The pressure swing adsorption period is short, and the adsorption capacity of O2 and N2 is far from reaching equilibrium (maximum value), so the difference of diffusion rate of O2 and N2 makes the adsorption capacity of O2 greatly exceed that of O2. N2 in a very short amount of time.
Pressure swing adsorption nitrogen production using carbon molecular sieve selective adsorption characteristics, the use of pressure adsorption and decompression desorption cycle, so that compressed air alternately into the adsorption tower (or a single tower to complete the air separation, so as to continuously produce high purity product nitrogen.