Issues with dirty nitrogen and nitrogen pressure
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The air separation unit is operating at reduced load; the pressure of the nitrogen gas exiting the main converter is 1-2 kPa higher than that of the contaminated nitrogen gas. Is this normal? Is it the effect of pipeline resistance or a regulation issue when this happens? Thank you!
It should be a regulation issue. What’s the pressure under normal conditions?
Regarding the pressure at the base of the nitrogen pipeline where dirty nitrogen exits the tower, it’s definitely higher for dirty nitrogen. However, after it passes through the main exchanger and the subcooler, it’s harder to say – plate resistance and gas flow rate both have an impact. Additionally, the difference might be only one or two thousand pascals, and instrument errors could also play a role~~
Is the adjustment issue you mentioned an abnormal situation? We are operating at reduced capacity here; this situation occurs when I need to adjust the purity of nitrogen by reducing the amount of gas extracted. The volume of gas entering the tower is 60,000, with 29,000 being nitrogen, and around 25,000 being impure nitrogen. If 80,000 are fed into the tower at full capacity, the above situation will not occur
This situation does not occur under full production capacity; it happens when nitrogen extraction is reduced. Personally, I don’t think it should be considered an abnormal issue
At full load, what are the levels of contaminated nitrogen and gaseous nitrogen?
What is the difference at full load? ~5kpa？ It is recommended to mainly check whether the ratio of contaminated nitrogen to nitrogen production is related to the pressure difference between contaminated nitrogen and gaseous nitrogen~~
The nitrogen at full load is 30,000, while that in the contaminated condition is around 31,000; the pressure of the nitrogen should be about 2 kPa higher than that of the contaminated nitrogen