C4/C5 fractionation tower
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The temperature fluctuations in the C4/C5 columns of the reprocessing unit are too large after cooling; however, the column pressure remains stable, as does the bottom temperature. The reflux rate doesn’t change. Could this be due to variations in ambient temperature, with temperatures swinging between 15 degrees and 36 degrees?
Is there too much of light components such as C3 and C2 in the tower feed?
Theoretically, the composition has changed, and the temperature is unstable after cooling