Nitrogen stripping for diesel hydrocracking fractionator
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The distillation column of the diesel hydrogenation unit (operating pressure: 0.05 MPaG) results in diesel products containing excessive water due to stripping with steam; now, nitrogen stripping is being planned. Excuse me, it’s steam at 1.0 MPa and 1.5 tons per hour. How much nitrogen is required?
Using 0.8 Mpa nitrogen, 300-500 l/h is required
Why? Can’t dry air lift be used?
It’s likely that the water carryover is caused by an excessively low temperature at the top of the tower; if the temperature there is above 120, things should be much better
Isn’t there a diesel filter and a coalescer before the diesel leaves the unit? They can remove the water from the diesel to within the required levels.
Steam stripping generally does not carry water either; is there a problem with the design of the stripping tower? If the steam temperature is insufficient, it can be modified. . .