Oxygen purity adjustment
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The main cooling liquid level is rising, the oxygen purity keeps decreasing, and there is internal compression of liquid oxygen. What is the principle behind the fact that reducing the amount of oxygen helps to increase its purity?
One must learn how to calculate material balance; the amount of oxygen exiting the tower must be lower than the oxygen content in air. If it exceeds that level, meaning the extraction rate is greater than 100%, then nitrogen or argon must have mixed in, and the purity will certainly not meet the requirements~~
Check whether the main cooler is full and no longer functioning
Is the liquid nitrogen reflux to the upper tower too much?? The purity of the liquid nitrogen is extremely high~~
Bring the oxygen level back to the designed value; if you increase the oxygen supply too much, nitrogen and argon will mix in, resulting in a decrease in purity
Reducing the amount of oxygen can increase purity, but this is not absolute; if the amount taken out is too large, reducing the oxygen level can indeed improve the purity of the oxygen. The level of the main cooling liquid rises; if it exceeds the operational design limits, the purity will inevitably decrease as the evaporation rate of the main cooling liquid reduces, which in turn leads to a drop in purity.