Seeking help with PSA adsorption tower
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Why is the PSA adsorption tower able to be pressurized and purged more quickly compared to other towers? What impacts can occur due to the excessively long adsorption time in this tower?
It’s best to upload the pressure curve. Let me take a look for you
I’m not sure how many towers your PSA system has; normally, purging and pressing are controlled by programmable valves. If the adsorption time is too long, the absorption efficiency decreases. The PSA system in our facility has been in operation for nearly 9 years, and we have not encountered any of the phenomena you mentioned.
Wait for me to upload it to show you. Another question: what effects will water have on molecular sieves? Could it be that the molecular sieve has failed?
Due to improper operation, one tower remained in operation for an excessive length of time; then this tower was used to purge another tower. Could it be that the first tower had become saturated, which caused the molecular sieve in the tower being purged to get damaged due to exposure to water?
There is also that possibility, but I still focus on the likelihood that the adsorbent will fail.
PSA adsorbents are catastrophic when exposed to water and cannot be restored
What you can say is that it’s the impurities in the adsorbent that are above the limit; it has nothing to do with water content
I don’t quite understand what the original poster means – are they saying that the pressure in the tower is rising too quickly? I think I need to check first whether the gauge readings are correct.
Hello! I was wondering what the temperature difference before and after the PSA tower is like in summer where you are? What is the maximum temperature tolerance of PSA adsorbents? At the moment, here we have a temperature difference of 7 degrees between day and night, while the pressure difference remains roughly the same at night. Moreover, the tower’s operating time changes with temperature. Regarding the issue with the tower’s operation, it may be caused by a high nitrogen content in the gas used during startup.
Hello! I was wondering what the temperature difference before and after the PSA tower is like in summer where you are? What is the maximum temperature tolerance of PSA adsorbents? At the moment, here we have a temperature difference of 7 degrees between day and night, while the pressure difference remains roughly the same at night. Moreover, the tower’s operating time changes with temperature. Regarding the issue with the tower’s operation, it may be caused by a high nitrogen content in the gas used during startup.