1. Factors affecting the stability of nitrogen making machine

Nitrogen making machine is a high-tech product involving machine, electricity and instrument, and the stability of the equipment is especially important in long-term use. It is not difficult to see from the composition of the nitrogen machine that the stability is affected by the following two points: 1. Control valve: For the pressure swing adsorption nitrogen machine, the valve must have the following properties: Good material performance, absolutely no air leakage; b. Complete the on or off action within 0.02 seconds of receiving the control signal; c. Can withstand frequent opening and closing to ensure long enough service life; 1.1, the root of the valve failure under normal use, each programmed valve in each cycle (about 120 seconds) must be switched on and off once, according to the nitrogen machine 300 working days a year, 24 hours a day continuous movement, adsorption and desorption cycle of 4 minutes, then each valve needs to open and close more than 200,000 times a year. The failure of just one valve will affect the normal operation of the entire equipment. Therefore, the continuous service life of the valve is the most important part of the stability and reliability of the nitrogen machine.

Second, carbon molecular sieve performance indicators

a. hardness b. Nitrogen yield (Nm3/T-h) c. recovery rate (N2/Air)% d. Filling density above the index carbon molecular sieve manufacturers have been indicated at the factory, but can only be used as reference data, how to make the carbon molecular sieve play the maximum efficiency, which has a direct relationship with the process of each nitrogen manufacturer and the adsorption tower height diameter ratio, while ensuring the service life of the molecular sieve is very particular

Third, the effect of oil and water in the air on molecular sieve

Because the air contains a certain amount of water and oil vapor, after the compressor, if not strictly air purification treatment, oil vapor is easy to be adsorbed by carbon molecular sieve, and difficult to desorption, stuffing the molecular sieve pore size, resulting in molecular sieve "poisoning" failure. Therefore, setting up a strict air purification device before the compressed air enters the adsorption tower is an essential part of ensuring the service life of the molecular sieve. Although water is not fatal to molecular sieve, it will increase the adsorption "load" of molecular sieve, that is, affect its ability to adsorb O2 and CO2, so compressed air drying water removal is a problem that can not be ignored to improve the adsorption capacity and stability of molecular sieve.