Regarding water in the seal air outlet of the expander
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There are droplets at the exhaust port of the seal air for our expander; it seems to be either oil or water – I’m not sure what it is. After cleaning it, those droplets reappeared after 2 days
Bro, water is just water, and oil is just oil; put some on a piece of paper, wipe it with it, and you’ll be able to see it. It is usually water; the temperature of the sealing gas is low, causing the moisture in the air to condense.
Do you have this situation? It feels like water to the touch, but it’s also a bit shiny, like oil. I’m going to try using paper pieces
If you’re worried, you can measure the dew point; the most likely cause is a low temperature of the sealed gas emissions, which leads to the condensation of water vapor in the air~~
The dew point of the sealing gas is not within acceptable limits; water condenses at low temperatures
With my ACD expander, the exhaust temperature of the bee gas is quite high – almost 60 degrees – but it doesn’t seem to be a problem
Check the exhaust temperature; if it’s low, that’s possible. It’s possible that the seal gas pressure is low, causing the back of the expansion-stage wheel to cool down
I don’t know what the expansion medium for your expanders is. If it is air, you can try using an oxygen meter for a simple test; if an alarm indicates low oxygen levels, it is likely that the sealed gas has formed condensation water due to the lower temperature compared to the outdoor temperature. If it displays normally, then it indicates that there is an internal leak at the expansion end, causing cold leakage. However, if that is the reason, the exhaust pipe should experience severe frosting, as the temperature at the more expanded end is very low. So if the expanding medium is nitrogen, then it is only possible to determine whether the leak is caused by internal leakage or by the release of sealing gas by examining the severity of frosting on the discharge pipe. Oxygen meters are not very accurate, but they can be considered a rough method of analysis.
Generally, the dew point of the air separation seal gas is required to be -40 degrees; whereas if the gas comes from after the molecular sieve, it should be above -60 degrees
First, figure out whether it’s oil or water; otherwise, the situation is completely different