Sudden drop in the temperature of the distillation column
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The feed composition remained largely unchanged, the bottom temperature of the tower was fairly stable, the reflux was stable, while the temperature from the tower body to the top of the tower dropped suddenly by about 20 degrees. Please ask the expert to explain
The instrument, or transmitter, may be faulty.
It’s probably not a gauge issue; when the reflux temperature was reduced, it rose again gradually, but once the reflux increased, the temperature dropped
Is it possible that the feed rate is a bit too high and the output rate is too low, resulting in liquid accumulation on the trays at the top of the tower? This leads to a drop in temperature, and over time it may even cause flooding.
After the incident occurred, the feed rate was reduced. The final temperature still doesn’t rise well enough
Check if the backflow flow meter is showing a false value Also determine whether the top tower output has decreased Increased bottom reboiler draw? If so, it is likely caused by inaccurate backflow volume, or by a decrease in the temperature of the backflow fluid despite unchanged backflow volume.
Is there a fluctuation in the hot gas source for the reboiler (steam or heat transfer oil), or is there a leak in the tube side of the top condenser (where circulating water flows)?