Application of Internal Reflux and External Reflux in Stainless Steel Distillation Unit


Release time:

2026-06-04

External reflux is beneficial for process flow and temperature control, as it not only incurs high operating costs but also does not utilize the potential energy of the liquid, resulting in high costs. If the condenser at the top of the tower cannot meet the condensation requirements, a forced condensation reflux system can be added to enhance the operation of the stainless steel distillation unit. In addition, when investing, it is necessary to compare the relative size of operating costs and infrastructure investment costs.

External reflux is beneficial for process flow and temperature control, as it not only incurs high operating costs but also does not utilize the potential energy of the liquid, resulting in high costs. If the condenser at the top of the tower cannot meet the condensation requirements, a forced condensation reflux system can be added to enhance the operation of the stainless steel distillation unit. In addition, when investing, it is necessary to compare the relative size of operating costs and infrastructure investment costs.

If the measurement requirements for reflux liquid are not high, or if the operating elasticity of reflux ratio is large, internal reflux can be used;

If an "online flow measurement instrument" can be installed or developed on the internal reflux route, internal reflux can be achieved. Ordinary distillation is mostly carried out by external reflux!

The advantage of external reflux is that it is easy to adjust, but it increases operating costs and leakage points, which may not be suitable for high-risk media. Therefore, internal reflux is preferred for high-risk media that are not too high in the tower, such as hydrogen fluoride distillation, which uses internal reflux. So, the choice of reflux method should be comprehensively considered from multiple aspects.

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