The components of the dry gas have changed suddenly; experts, please analyze what could be the reason?
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Recently, the composition of the dry gas produced by my catalytic cracking unit has changed, as follows: Air, methane, ethylene, ethane, propane, propylene, isobutane, n-butane, n-isobutylene, trans-butylene, cis-butylene, C5H2, H2S. Percentages: %%%%%%%%%%%; Concentrations in mg/m3: 34.79, 22.58, 1.44, 1.66, 6.48, 6.71, 3.16, 0.21, 0.15, 0.14, 22.67, 852. What could be the cause of this?
1. What was the situation originally? Compared to before, where are the main abnormalities? 2. Is there no hydrogen? 3. The air quality is significantly high!
Missed it? Contaminated? Word count, word count
The air content is 35% – how is that possible? Could it be that there’s a leak in the stripping section? Please organize the data before sending it again; it’s not very clear
The nitrogen content is generally between 20 and 30; if it is too high, we experience problems such as perforations in the stripping section or vertical pipes. Our plant has a coaxial design, and after such perforations, it becomes difficult to control the inventory in the stripping section, as well as the opening degree of the stop valves
Reply to 2# jiang_ry: It’s mainly the content of components C3 and above that changes significantly; it used to be below 7%, but now it’s much higher