Why should the nitrogen making machine be maintained? Why does the nitrogen purity of the nitrogen making machine decrease?
Time：
Feb 18,2020
The principle of pressurized adsorption and depressurization desorption is an automated equipment that adsorbs and releases oxygen from the air to separate nitrogen. Carbon molecular sieve is a kind of coal as the main raw material, after grinding, oxidation, molding, carbonization and through a special hole processing process, the surface and internal covered with microporous cylindrical granular adsorbent, black, carbon molecular sieve pore size distribution characteristics so that it can achieve the kinetic separation of oxygen and nitrogen. This pore size distribution allows different gases to diffuse into the pores of the molecular sieve at different rates without repelling any of the gases in the gas mixture (air). The separation effect of carbon molecular sieve on oxygen and nitrogen is based on the slight difference between the kinetic diameters of the two gases. The kinetic diameter of oxygen molecules is small, so there is a faster diffusion rate in the micropores of carbon molecular sieve, and the kinetic diameter of nitrogen molecules is large, so the diffusion rate is slow. The diffusion of water and carbon dioxide in compressed air is not much different from that of oxygen, while argon diffuses more slowly. The final enrichment from the adsorption tower is a mixture of nitrogen and argon. After long-term use, it will cause the pore size of the carbon molecular sieve to change; if the compressed air contains moisture and oil, it will also affect the pore size of the carbon molecular sieve, thereby affecting the nitrogen production performance, resulting in a decrease in nitrogen purity. Therefore, the nitrogen making machine needs regular maintenance.
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