Air separation upper tower
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What are the hazards of high pressure in the tower? Thank you
Given the limitations imposed by the design requirements, why is it necessary to control excess values? So there’s no need to talk about the hazards – in severe cases there are explosions, while in milder cases the safety valves activate and the operating conditions become abnormal. It’s best not to use this topic as a subject of discussion. These questions are often set by mediocre technicians as exam questions. It would be better for learning* to focus more on the principles of processes.
For a given distillation system, the higher the distillation pressure, the lower the relative volatility; moreover, the higher the operating temperature of the column, the less favorable it is for separation.
Within the design range, high pressure in the tower results in high energy consumption.
The pressure at the top of the tower is high, the level of the main cooling liquid rises, and the oxygen purity decreases.
Most likely, water was present and froze, causing abnormal distillation conditions!
High pressure in the upper tower, poor separation efficiency, high energy consumption
The pressure in the upper column is high, and consequently the pressure in the lower column is also high; this results in high energy consumption by the air compressor. The high pressure in the upper column leads to poor separation of oxygen and nitrogen, preventing the product from achieving the desired purity level