Why should the amount of nitrogen removed be reduced when its purity is low?
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Isn’t the low nitrogen purity due to an excessively small reflux ratio? Will the L/V reflux ratio increase when nitrogen is removed? Why is the nitrogen purity lower even though a larger amount of nitrogen is removed?
If too much is extracted, the backflow will be less, right? The total amount of evaporation must be constant, right?
At a constant load, the yield of nitrogen is also constant; of course, if the amount extracted is large, the purity of the nitrogen will decrease!
With all the oxygen pumped in, isn’t the purity bound to be high?
Following material balance, excessive nitrogen extraction from the tower leads to an increase in the nitrogen purity gradient, resulting in a decrease in product purity.
I believe the purity of nitrogen is mainly controlled by the valve that feeds liquid nitrogen into the tower; as long as the amount taken out is not excessive, there should be no significant impact
Material conservation – there’s no need for complicated explanations; it’s just that simple.