Issues regarding the catalyzed diesel distillation temperature and yield.
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Recently, there have been significant fluctuations in the amount of diesel delivered from the distillation unit. Upon observation, no major variations were observed in the various parameters of the distillation tower (such as the temperature and pressure at the top and bottom of the tower, the temperature at the intermediate reflux point, and the temperature of the gas phase at the bottom of the tower). The analysis showed that the temperature variation when light diesel is drawn in and out is significant. I would like to ask the experts here for their analysis of the reasons behind the fluctuations in the temperature of the light diesel being drawn out, as well as suggestions on how to address this issue. Thank you! ! !
Has the medium volume ratio changed from usual? Has there been any change in the feed rate? How about the dry point of diesel? The key is not knowing what form the selection process at your middle school takes. The preliminary estimate is that the liquid level in the stratum oil collection tank in Unit 1 is too low, resulting in no liquid phase reflux from the lower trays.
I think it’s due to the low return traffic from your No.1 Middle School.
Currently, the throughput of the first reactor back to the tower is around 345 t/h, while the raw material processing rate is 178 t/h. Is this amount of return to the tower small or large?
The medium volume is similar to normal levels; the diesel’s dry point is unstable – when the temperature at which diesel is extracted is high, the dry point is high, and when the extraction temperature is low, the dry point is low
Analyze whether there has been any change in the processing volume, by examining how the previous stable extraction rate has now become fluctuating, in order to determine what adjustments have been made to the fractionation process.