The vacuum level in the stripping section of the vacuum distillation tower fluctuates greatly, whereas the vacuum level at the tower top remains stable.
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As the title suggests, is it affected by changes in the feed pressure at the inlet of the vacuum tower?
It should be affected by changes in the gas-phase load of the feed gas to the reducer
Agree with what was said above – is it the unstable outlet temperature of the heating furnace?
There is liquid accumulation inside the furnace tube, or the downcomer in the vacuum tower has stopped functioning, resulting in flooding of the tower
I think the issue is most likely with the instrument
The poster should carefully observe the operation of the vacuum furnace and the upper part of the vacuum tower; both can affect the vacuum level in the feed section, and there are always some clues to be found. It’s necessary to locate those clues in order to conduct an analysis, right? If all other operating parameters remain unchanged and the quality is still satisfactory, then it must be a problem with the instruments, haha.