The dew point does not decrease but increases during nitrogen purging
Thread Content
The cold press was purged with nitrogen to lower the dew point; the machine was started using nitrogen when the dew point reached -50. However, after starting, the dew point increased to -30, so the machine was shut down again and purged with nitrogen while also venting air. The dew point continued to rise despite this. Since all parameters related to the nitrogen pressure as indicated on the official website were normal, what could be the cause of this phenomenon? I’m asking for help from experts. Could it be related to pressure and temperature?
Dew point is directly proportional to pressure! Theoretically, it has nothing to do with temperature.
Could there be an issue with the dew point of nitrogen itself?
What kind of treatment is applied to the nitrogen inlet air – cold drying or slightly warm drying? Are there filters before and after it?
Was the cause found later? I’ve also encountered the difficult problem of understanding how to measure the dew point of natural gas; the dew point of natural gas in the municipal pipeline network is 15 degrees above zero