I would like to ask fellow experts how the vapor tower in the separation tower achieves sealed discharge during the shutdown of the plant

Isn’t closed-loop emission just using a flare? In the later stages of the distillation tower, when there are no combustible materials left, it should be possible to discharge the waste directly on site

Personally, I think it’s not good to use a flare stack; in the end, the gas still goes up into the sky, failing to achieve the goal of keeping the gas from reaching the sky and the oil from falling to the ground. Moreover, the water that condenses along the flare stack line cannot be drained, which may lead to water hammer effects. Recommendation: Keep the top air cooling fully open to condense the oil-containing vapor from the distillation tower in the top reflux tank, and then discharge it to the oily wastewater system through the closely spaced pipes in the reflux tank. If there is no such close-packing process, or if the diameter of the close-packing tubing is too small to handle the flow, it is possible to remove the on-site level gauge and run a pipe from below the gauge connected to a flexible metal hose in order to channel the oily wastewater to the appropriate system. Please point out any mistakes! ! !

First, apply oil to it completely, then replace it with nitrogen. Next, use steam to clean the tower in order to remove the initial water and oil into the waste oil tank. Once it is confirmed that there is no oil left, the steam treatment of the tower can be stopped – and that’s basically it

Be sure to open the bypass for the tower top safety valve; otherwise you’ll suffer the consequences – it took three attempts, and it was all in vain, tears only