Imprecise liquid level measurement in the propylene column (with reboiler)
Thread Content
The propylene distillation column (with a reboiler) in our plant uses dual-flange level gauges, but the readings have been inaccurate; we would appreciate some advice from those with more experience
For other types of differential pressure gauges, it is necessary to understand their operating conditions; media that tend to form scale easily, as well as those with changing densities, are not suitable for use
The propylene distillation tower (equipped with a reboiler) uses double-flange level gauges; however, when the level is very close to 0%, interference from the steam used for bottom heating occurs. In such cases, it’s better to use float level gauges, and the float level gauges we use work quite well
““The measurements have been inaccurate all along” – is this the conclusion drawn by comparing them with the on-site level gauge? Is the material density for the differential pressure range based on propane?
There are also times when it’s close to 0%! Generally, the liquid level is controlled at around 50%, and we use differential pressure for that