The impact of high or low moisture content in the air entering the lower tower on operating conditions
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What factors are related to the humidity of the air entering the lower tower? What are the effects of too high or too low moisture content on operating conditions?
Too low a moisture content is not favorable for oxygen purity, as the purity of liquid oxygen will be poor! Being too large is not favorable for nitrogen purity, as most of the gas rising from the lower column
The moisture content of the air entering the lower tower is approximately 3% to 5%, which is used to compensate for the heat loss of the system.
What factors are related to the humidity of the air entering the lower tower? What are the effects of too high or too low moisture content on the operating conditions? Answer: 1. It is related to the amount of air entering the tower, the amount of air expanding, and the temperature after the expander ； 2. High moisture content leads to an increased reflux ratio during coating, resulting in a decrease in oxygen purity ； With a low moisture content, the reflux ratio during coating is reduced, which helps to improve oxygen purity. (For reference)
It seems that as humidity increases, oxygen purity decreases, while as humidity decreases, oxygen purity increases
As a supplementary note, it is also related to the gas volume exiting the tower and the expansion air bypass flow! The moisture content affects the reflux ratio in the lower column; a higher moisture content results in lower purity of the liquid and vapor in the lower column, which in turn leads to lower oxygen purity in the upper column! Nitrogen is the opposite.