In the actual main fractionation tower, there is an external pipeline on the upper and lower trays of the feed section, equipped with a Venturi flow meter. What is the purpose of this pipeline? It’s as if the external downcomer returns to the bottom of the tower
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Seeking advice from experts on fractional distillation towers
Most distillation towers involve very complex processes; only by sharing your process diagram can we provide an analysis based on it.
I think what you might be referring to is measuring the backflow rate. It should be at that tray near the side line extraction outlet, right?
The location you mentioned should be the extraction line for the products from the fractionation tower; generally, there is an oil collection tank at this extraction line, and it is likely to be connected by a downcomer. . It is to transfer the oil from the oil collection tank to the next tray. It depends on the drawings for specifics. .
Looking at it in conjunction with the PID drawings will provide a clearer understanding
It measures the internal return flow rate, but what is the significance of that?