Causes and solutions for the decline of purity of nitrogen generator

Nitrogen generator is based on the principle of pressure swing adsorption, using high-quality carbon molecular sieve as adsorbent, and nitrogen is prepared from air under a certain pressure. The purified and dried compressed air is subjected to pressure adsorption and decompression desorption in an adsorber. Due to the aerodynamic effect, the diffusion rate of oxygen in the micropores of the carbon molecular sieve is much larger than that of nitrogen, and the oxygen is preferentially adsorbed by the carbon molecular sieve, and the nitrogen is enriched in the gas phase to form a finished nitrogen gas. Then, the pressure is reduced to a normal pressure, and the adsorbent desorbs impurities such as adsorbed oxygen to regenerate.

Today we will talk about the causes and solutions for the decline in the purity of nitrogen generators :
First, the reasons for the decline in purity are:
1. The adsorption pressure of the nitrogen generator is unstable, which is too high, exceeding 0.8Mpa or the adsorption pressure is too low, below 0.6Mpa; 2. The water content of the gas source is too much;
3. The air outlet part is leaking;
4. If the intake air is too large, the pressure will rise too fast;
5. Molecular sieve poisoning of nitrogen generators.

Second, there are several solutions to improve the nitrogen purity of nitrogen generators:
1. Reduce the time pressure and increase the intake pressure;
2. Add a storage tank to the air inlet;
3. Remove and re-plug;
4. Replace the molecular sieve;
5. Adjust the inlet regulator of the nitrogen generator to reduce the intake air volume, and install the oil-water separator before the inlet.

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