The lifespan of the carbon molecular sieve of the PSA nitrogen generator is about 6-10 years under normal use. However, in actual work, damage to the carbon molecular sieve is common. Common ones include a decrease in adsorption capacity caused by the inhalation of oil and water by the molecular sieve. In addition, One of the more serious situations is the pulverization of molecular sieves.

Molecular sieve pulverization (also called ash spraying) is a major fault in the nitrogen production system. It is mostly caused by loose carbon molecular sieve pressure or loose carbon molecular sieve. The reason why the molecular sieve is not pressed tightly is that the nitrogen generator is not rigorous during the production and assembly process, so that the carbon molecular sieve is not pressed tightly. The looseness of the molecular sieve is due to structural problems in the adsorption tower caused by the nitrogen generator being hit during operation or the equipment moving. The adsorption tower pipeline is desoldered, causing the carbon molecular sieve to flow out, and the carbon molecular sieve becomes loose and pulverized.

If molecular sieve pulverization has occurred, you will see smoke and spraying powder from the nitrogen generator , and the powdered molecular sieve will be discharged from the nitrogen outlet or silencer outlet; although carbon molecular sieves are expensive, the powdered molecular sieve cannot be continued There is only one solution, which is to completely replace the carbon molecular sieve in the entire system. If you continue to fill the tank with molecular sieves, the molecular sieve powder will only flood the entire nitrogen pipeline system.

Measures to prevent carbon molecular sieve powdering in nitrogen generators:

1. Choose molecular sieves with reliable quality

2. Professional and reasonable bed layout

3. Professional filling

4. The inside of the tanks are clean and smooth without burrs.

5. Reasonable use pressure and regeneration time

At present, judging from the trend, molecular sieves may become smaller and smaller, and the surface adsorption efficiency will become higher and higher; correspondingly, the pressure-bearing capacity of molecular sieves will become weaker and weaker. Therefore, reasonable use of pressure may become the first factor to prevent molecular sieve powdering.