Dry gas seal flow rate
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When the circulating N2 compressor in our plant stops operating, the flow rate at the main seal drops to 0, then rises to 3 Nm3/h, before gradually falling back to zero. It takes about 22 hours for the flow rate to reach 0. Could anyone tell me what the reason for this is? Have you encountered the same problem?
It doesn’t seem to be a problem with the instruments; check the process pipelines or mechanical components instead.
The original poster didn’t clarify the process – whether it happens every time or only occasionally, and whether it occurs while driving or during normal operation. Generally, when a dry gas seal fails, the increase in leakage is a slow process.
Our compressor is rather special – it starts and stops frequently, two or three times a month. Basically, the same situation occurs every time: the flow rate of the dry gas seal first drops to 0, then rises to 3, and afterward drops back to 0
The red line represents the trend of the seal gas flow rate