What is the effect of increasing the pressure in the tower on the argon fraction – does its range shift upward or downward?
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What is the effect of increasing the pressure in the tower on the argon fraction – does its range shift upward or downward?
The pressure at the top of the tower increases, and the region where the argon fraction is enriched moves upward
I think the increase in pressure in the upper column is achieved mainly by reducing the flow rate of oxygen and nitrogen supplied, that is, by decreasing the production volume to raise the pressure in the upper column. If the pressure in the upper column increases due to an increase in the amount of air fed into the column, it means that the argon-rich zone has moved upward. If only the amount of nitrogen leaving the tower is reduced, that is, if the set pressure for the pre-cooling system is increased and the reflux ratio to the upper section rises, then the argon-rich zone in the argon fraction shifts downward, resulting in an increase in the nitrogen content. If it is by reducing the oxygen output from the tower, then it is the opposite.
After pressurization and parallel connection, the pressure in the upper column increases; the argon fraction moves upward. An increase in the amount of air processed leads to an increase in the output volume, as well as an increase in the ascending gas flow. When the amount of argon fraction being extracted remains constant, the distillation range for the argon fraction rises