Excessive carbon dioxide levels

1. Reduce the air temperature at the inlet of the molecular sieve. 2. If it’s a new molecular sieve, try self-regeneration for two cycles (use a higher regeneration temperature and maintain it for some time). 3. Operate the pre-cooling system carefully: pressurize first before adding water, to prevent water from entering along with the air. 4. Check whether the thickness of the molecular sieve is insufficient; consider the following points. 5. Are there two peaks? Could it be that part of the molecular sieve has become powdered and shifted in position? The above are just my personal opinions

800PPm？ The entrance? Do you have inlet carbon dioxide analysis there? What was the original entry metric? If it is at the inlet, simply replacing the molecular sieve will not solve the problem; instead, it is necessary to identify the source of carbon dioxide emissions and control those emissions. . .

Thank you for your advice. What we measured was the carbon dioxide level in the air (800 PPm); the normal level in the atmosphere should not exceed 400 PPm. The level is much too high, as there are chemical plants in the surrounding area.

With a high carbon dioxide level in the environment, the molecular sieves need to be much larger than those used in other places! The pre-cooling system and purification system require strict control of their parameters! ! Otherwise, your lifespan can’t be guaranteed!

If that is the case, it is necessary to check whether the parameters provided to the air separation manufacturer are accurate, as the size of the purifier designed depends on the environmental conditions. For example, if the actual level of carbon dioxide is twice that specified initially, then new information should be sent to the air separation manufacturer so that they can determine whether the existing type, size, and quantity of molecular sieves are sufficient to meet the requirements of the operating conditions. Another point to note is to monitor the conditions under which the molecular sieve is used. This includes the temperature at the end of the heating process, the time and temperature at which peak cold-blowing occurs, the times when the carbon dioxide levels at the analysis points associated with the molecular sieve exceed the acceptable limits, as well as the resistance of the molecular sieve. By taking these parameters into account, it is possible to reduce the time spent in each stage of using the molecular sieve, thereby shortening its overall usage cycle. . .