JJW comments:

So, the position of Nozzle N1 is OK.

With the 1.1m evaporator top section and a flow of raffinate of 4150 kg/hr I get a residence time in this top section of 10 minutes. 
1)	For the first LLE (that is the Australian one) this will be fine since the client will be using a centrifuge to separate the last bit of solvent out of the NMP prior to the solvent stripping section. I therefore approve this extractor.
2)	For the second extractor I will be asking for Technoforce to investigate a taller solvent settling section and/or some type of coalescing mesh section here prior to discharging the raffinate.

Awaiting your reply....

