Regarding the issue of flow rate fluctuations after the molecular sieve
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The problem is as follows: Two molecular sieve adsorption tanks operate in alternating fashion, and the outlet flow rate remains stable during the operation of tank 1#. 2# The outlet flow fluctuates significantly during operation. On-site inspection showed no leaks at the flanges and valves. It is speculated that the molecular sieve bed may be uneven. Please help analyze it! Thank you!
What type of craftsmanship do you belong to? Has the concentration changed? Could you be more detailed?
Horizontal adsorber? ~~Did cold blowing result in a double peak or multiple peaks? ~~
Upright, cold blow with two peaks (149, -17°C)
Low-pressure internal compression process; carbon dioxide concentration fluctuates somewhat (between 0.7 and 0.9)
Cold blow peak 149? It’s too high~~ Did the increase in carbon dioxide lead to an enhanced regeneration strength? Can I upload a picture? ~~
Why is the carbon dioxide content so high after the molecular sieve? ~~
0.7-0.9 ppm – that shouldn’t be considered too high, right?
The maximum heating temperature is 150 degrees Celsius, and the minimum adsorption temperature is -15 degrees Celsius
The unstable bed packing you mentioned is likely due to this reason. Additionally, your peak temperature is indeed too high. The inlet adsorption temperature you mentioned of -15 degrees is incorrect; adsorption doesn’t occur at sub-zero temperatures. The adsorption temperature should be around 10-15 degrees
It depends on your control criteria~~ Generally, it should be kept below 1 ppm, though there are also criteria that require it to be below 2 ppm~~