Composition issues of the overhead gas from the vacuum tower in the atmospheric and vacuum distillation units of refineries
Thread Content
Regarding the overhead gas from the vacuum tower in atmospheric and vacuum distillation units, I would like to ask my colleagues from other plants: what are the levels of oxygen and nitrogen in your component analyses? The oxygen content in the gas removed by us is always around 15%; the nitrogen content is around 30% when it’s low, and over 70% when it’s high. There were no abnormalities in the vacuum level at the site, and no leaks were detected during the inspection. Compared to yours, will the gas from top removal have such high levels of oxygen and nitrogen?
Could air have gotten in during sampling? This is a possibility if the sample results are unstable. Multiple samples can be taken from the same sampling port at the same time to see if the results differ significantly.