Distillation
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How to examine the impact of changes in distillation feed processing volume on separation? Thank you all! ! ! For example, those quantities should be specified during simulation!
This is usually included in the device material flow diagram when designing the device! (Normal flow rate and maximum production load) If the feed volume for distillation exceeds the maximum production load, the quality of the product generally does not meet the requirements.
For an existing distillation tower, the feed amount cannot be changed casually. Even if the distillation tower is designed, the feed amount mainly affects the size of the tower. The main factors affecting separation should be the feed thermal condition, the number of trays, the reflux ratio and operating pressure, and the feed position.
That's what it said above. In terms of pure simulation, changing the feed amount requires adjusting the overhead distillate volume, otherwise the composition of the overhead product will definitely change, according to the material balance. Changes in the feed volume will inevitably affect the gas-liquid phase flow rate in the tower, and the entire tower structure needs to be redesigned. The poster can calculate the approximate feed amount according to the product requirements and boring balance (the feed composition has been determined), and then make fine adjustments