Adjustment of the distillation system
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When the reaction system increases or decreases the processing volume, the distillation system correspondingly increases or decreases the flow rates of each stream. What is the logic behind such operation? Is it okay to maintain the original circulation volume control?
A distillation tower adjusts the temperatures of various reflux streams and within the tower based on the quality of the product. If the processing volume is increased or decreased while the reflux streams remain unchanged, it is possible to adjust the ratio between the hot and cold streams in the heat exchanger in order to regulate the temperature. If these methods prove ineffective, then it becomes necessary to adjust the flow rates of each stream
After increasing or decreasing the processing volume, the gas phase in the distillation system also fluctuates accordingly, requiring the distillation system to adjust the corresponding reflux flow rate in order to maintain gas-liquid phase equilibrium.
The main task of the distillation tower is to ensure that the product quality meets the required standards, and the adjustment of production volume is based on this.
What are the advantages and disadvantages of operating with a large circulation volume versus a small circulation volume?
It’s not a matter of advantages and disadvantages; when the circulation rate is too high and the gas-liquid phase equilibrium is disrupted, the direct impact is on product quality