How to judge carbon molecular sieve is out of work?
Time:2025-06-25
The methods for determining the failure of carbon molecular sieves include the following:
* Shelf life and performance degradation: The performance of carbon molecular sieves will degrade by approximately 5% annually. If the shelf life is long and the performance significantly decreases, regular maintenance or replacement may be necessary.
* Decreased nitrogen production: If the nitrogen production of the nitrogen generator significantly decreases, it may be caused by the aging of carbon molecular sieves.
* Decreased water removal effect: By detecting the moisture content in the treated gas or liquid, if a significant increase in moisture content is found beyond the expected range, it may indicate the failure of the molecular sieve.
* Slow adsorption rate: Under the same conditions, it is observed that the rate of water adsorption significantly slows down, with a significant difference compared to new molecular sieves.
* Difficulty in regeneration: After normal regeneration, it is found that its water removal ability has not been effectively restored when used again, or multiple regenerations are needed but the effect is still poor.
* Abnormal physical state: There are obvious physical damages such as breakage and pulverization, which may affect its adsorption performance.
What are the factors that affect the failure of carbon molecular sieves?
1、Quality of carbon molecular sieve
The higher the grade of carbon molecular sieve, the better its manufacturing process and material quality, resulting in a relatively longer shelf life.
2、Usage environment
* Temperature and humidity: High temperature and humidity environments can accelerate the aging process of molecular sieves and shorten their service life.
* Pollution level: If molecular sieves are exposed to oil pollution or other harmful gases for a long time, their adsorption capacity and performance will gradually decrease, affecting their service life.
* Working pressure: Excessive work pressure may cause damage to the structure of molecular sieves, thereby shortening their service life.
3、Usage frequency and load
Adsorption capacity: The more gas molecules adsorbed by the molecular sieve, the more saturated its adsorption capacity will gradually become, requiring more frequent regeneration processes, which will increase its wear and shorten its service life.
Running time: Long term continuous operation will accelerate the fatigue and aging of molecular sieves, especially under high loads.
4、Maintenance
Regular maintenance: Regular maintenance and upkeep of carbon molecular sieves, such as cleaning, regeneration, and inspection, can extend their service life.
Replacement cycle: According to the recommendations and usage of the equipment manufacturer, regularly replace aging molecular sieves to ensure the normal operation of the equipment and high purity of the gas.
How long does it take to replace carbon molecular sieves?
Under normal 24hour’s operation, the replacement cycle of carbon molecular sieves is usually 3-5 years. If used under better conditions, the lifespan can be at least 5-8 years. However, if the compressed air quality is poor, the replacement cycle may be shortened to 3-5 years.
The methods for determining the failure of carbon molecular sieves include the following:
* Shelf life and performance degradation: The performance of carbon molecular sieves will degrade by approximately 5% annually. If the shelf life is long and the performance significantly decreases, regular maintenance or replacement may be necessary.
* Decreased nitrogen production: If the nitrogen production of the nitrogen generator significantly decreases, it may be caused by the aging of carbon molecular sieves.
* Decreased water removal effect: By detecting the moisture content in the treated gas or liquid, if a significant increase in moisture content is found beyond the expected range, it may indicate the failure of the molecular sieve.
* Slow adsorption rate: Under the same conditions, it is observed that the rate of water adsorption significantly slows down, with a significant difference compared to new molecular sieves.
* Difficulty in regeneration: After normal regeneration, it is found that its water removal ability has not been effectively restored when used again, or multiple regenerations are needed but the effect is still poor.
* Abnormal physical state: There are obvious physical damages such as breakage and pulverization, which may affect its adsorption performance.
What are the factors that affect the failure of carbon molecular sieves?
1、Quality of carbon molecular sieve
The higher the grade of carbon molecular sieve, the better its manufacturing process and material quality, resulting in a relatively longer shelf life.
2、Usage environment
* Temperature and humidity: High temperature and humidity environments can accelerate the aging process of molecular sieves and shorten their service life.
* Pollution level: If molecular sieves are exposed to oil pollution or other harmful gases for a long time, their adsorption capacity and performance will gradually decrease, affecting their service life.
* Working pressure: Excessive work pressure may cause damage to the structure of molecular sieves, thereby shortening their service life.
3、Usage frequency and load
Adsorption capacity: The more gas molecules adsorbed by the molecular sieve, the more saturated its adsorption capacity will gradually become, requiring more frequent regeneration processes, which will increase its wear and shorten its service life.
Running time: Long term continuous operation will accelerate the fatigue and aging of molecular sieves, especially under high loads.
4、Maintenance
Regular maintenance: Regular maintenance and upkeep of carbon molecular sieves, such as cleaning, regeneration, and inspection, can extend their service life.
Replacement cycle: According to the recommendations and usage of the equipment manufacturer, regularly replace aging molecular sieves to ensure the normal operation of the equipment and high purity of the gas.
How long does it take to replace carbon molecular sieves?
Under normal 24hour’s operation, the replacement cycle of carbon molecular sieves is usually 3-5 years. If used under better conditions, the lifespan can be at least 5-8 years. However, if the compressed air quality is poor, the replacement cycle may be shortened to 3-5 years.
