The Effect of Undersized Gas Outlet Nozzle

[EmmanuelTop]

Good evening,

Just a quick one: what are the effects of undersized gas outlet nozzle in water knockout drums? Can this promote upset/dislodging of vessel internals?

In-house calculations show there is excessive momentum (>5,000 kg/ms^2) at the vessel gas outlet. At the same time, the performance of this vessel with regards to water removal efficiency is quite poor (<98%).

Any info on this subject?
Thanks,

 

[tickle]

Sounds like the KO drum is completely undersized if the rho v2 figure is high and the separation efficiency low. Is the KO drum now operating at a lower pressure?