There is a nitrogen seal on the top of the lean liquid tank in the catalytic refining system
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I only know that it can balance pressure and prevent air from coming into contact with the lean liquid; could someone please explain the principle?
The nitrogen sealing system consists of two lines: one for filling the tank with nitrogen, and another for releasing pressure to the flare. A pressure measurement point on the tank controls two valves, which ensure that the pressure remains constant; when the pressure is high, the excess pressure is sent to the flare, while when the pressure is low, nitrogen is used to maintain the desired pressure. The upper space of the amine solution is filled with nitrogen to isolate air.