Thubelihle

hi, the adjust unit is not working, and l am failing to troubleshoot. Thanks for your help. the manipulated variable variable does not affect the controlled variable when it should

dwsim file

table

hi. The column does converge, but the molor flowrate of the vapour leaving stage 1 is different to the molar liquid flowrate leaving the condenser. ln a total ondenser these should balance. This then led to a reflux ratio different from the specified one.

Hi. I attached the aspen NRTL interaction parameters. Tried to use DWSIM UNIFAC LL to estimate the parameters, but they look different as from those from aspen. l concluded that maybe they reoprt their parameters differently.

aspen solution

Thank you. Was wondering, used MIBK as a solvent to extract acetone from water. The MIBK is fed from the bottom of the tower and is meant to extract acetone and leave the top power as a rich solvent. The almost pure water is meant to exit the bottom of the tower. But in the simulation MIBK seems to miscible with water hence exiting also in the bottoms in large amounts. Also the extract product temperature is too high compared to one obtained from aspen

hi, when simulating an extraction unit, should l use the simple LLE flash algorithm since only two liquid phases are involved? thanks