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Differential Pressure Troubleshooting In Vacuum Distillation Column.

column. distillation differential pressure vacuum

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#1 chiaron


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Posted 22 March 2023 - 10:09 AM

The pressure at the top of the vacuum column is always the lowest as pressure decreases as vapor flows from the bottom (reboiler, kettle) to the top. If the pressure at the top of column is higher than the bottom of the column right before the reboiler and the DP measurement becomes negative, apart from a vacuum leak on the top, what else could contribute to this higher pressure reading assuming that the pressure indicators are correct and there is no heat applied to the kettle.

#2 Bobby Strain

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Posted 22 March 2023 - 11:25 AM

You need to do a bit of troubleshooting. We are flying blind with your query.



#3 Pilesar


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Posted 22 March 2023 - 12:05 PM

Is this at steady state or just an instantaneous measurement blip? There is no "assuming that the pressure indicators are correct." Check for liquid or plugging at the inlets to the pressure sensors.

#4 breizh


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Posted 22 March 2023 - 11:52 PM


Don't assume anything, replace your gauges with calibrated sensors and then share with us your data.

Work as an engineer, no guess here.

My 2 cents


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