Turbine vacuum issues
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The parameters of the turbine vacuum system fluctuate regularly, ranging from -0.076 to -0.086 MPa, with a cycle period of about 3 hours. The location is in Urumqi, Xinjiang, with an altitude of 500m there. I would be very grateful if an expert could provide an analysis
1. Check whether there are any fluctuations in the liquid level of the condenser； 2. Check whether there are fluctuations in the steam intake volume ； 3. For steam turbines of the extraction-condensing type, check whether there are fluctuations in the extractor
No fluctuations in liquid level/steam; fully condensing steam turbine
1. Air cooling or water cooling? Is the performance of air cooling not very good? 2. Is the capacity of the vacuum pump sufficient?
It’s water-cooled; something like this has never happened before – it only started to occur recently
If the air compressor unit is dragged, check whether it is related to the increase in the compressor load during the pressure equalization switching process with the purifier
It’s not the air compressor that is being moved; the air volume produced by the compressor unit remains essentially unchanged
We’ve had this situation here as well – periodic waves. You can compare it with the exhaust temperature to see if the pressure is accurate. There is some fluid accumulation in the pressure guiding tube here; it will improve after cleaning. We can try installing heat tracing for insulation