What are the key operating points during internal recirculation?
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When using internal recirculation in a distillation column, which parameters are the most important? What are the key points for operation?
Internal recirculation has not been used yet, but I believe controlling the reflux ratio is the most important factor. A higher reflux ratio leads to better product quality, yet it also increases energy consumption. The selection of the control point is undoubtedly the main issue that needs to be determined through practical production experience
It’s definitely the temperature. When the temperature is high, the heavier components tend to reach the top of the tower, which can lead to defective products ； Too low, low efficiency!
The top temperature is the most important, especially when producing the product. Therefore, it is necessary to control the heat load of the condenser properly.
Here, we use temperature difference to control internal recirculation
Could you explain in detail what the temperature differences for those specific temperatures are?