Nitrogen is used as the stripping gas

You can search on the forum for 【Is the stripping effect the same when using steam or nitrogen in a stripper?】 Theoretically, it is possible, but factors such as cost and safety must be taken into account. Additionally, since liquid nitrogen has a cooling effect, heating is required.

Is it easy to separate the vapor-phase material at the top of the tower from nitrogen? Nitrogen cannot be condensed, so the velocity of the gas phase at the top of the tower definitely increases. The pipelines need to be enlarged, which reduces the heat exchange efficiency; therefore, the heat exchange area must be increased. It would be better to focus on the separation of product from water at the top of the tower, such as using coagulators.

Oh, nitrogen can be condensed, but at -196 degrees. Will your condenser work?

It’s not necessary to condense the nitrogen; it can be separated using other methods

Yes, what are the components of the vapor phase material at the top of your tower? If there are many light hydrocarbons present, separation becomes difficult; in such cases, nitrogen mixed with those light hydrocarbons cannot be utilized. If the components at the top of the tower contain no light hydrocarbons or only a small amount of them, and they are all burned off in a flare, then there is no significant impact. However, nitrogen, as a gas-phase component, in the cooling system at the top of the tower **reduces the heat exchange efficiency of the top cooler. Since the heat exchange efficiency of gas-phase components is much lower, this factor must be taken into account. If the cooling system is large enough, it is also necessary to consider that nitrogen, as a gas phase, will increase the total volume of gas emissions from the top of the tower; in other words, the gas outlet pipe of the reflux tank at the top of the tower must be large enough.