Hello!
I've got my hands on Aspen Plus and trying to simulate coal tar distillation column, which I have at the factory I am working at. Just curious if is it possible to get more/less same results in Aspen as real world data. I am a scientist, not an engineer, so please forgive my question.
Basically, the column I am trying to simulate is a 50 stage packed column with input and 5 fractions. 3 middle fractions are taken as a liquid. Top fraction is taken as vapor, then cooled to ambient temperature and part of it is used for reflux. Bottom fraction has no reboiler/heating, so bottoms are just taken at constant rate as liquid.
What I am trying to use at ASPEN RadFrac column is condenser=none, reboiler=none. I manually add cooler and splitter to do a reflux on the top stage, so it is clear. But basically ASPEN demands to have some kind of reboiler. It can be reboiler incorporated in RadFrac or a pump around or a Heater/Splitter going bottom stage.
But physical column I am trying to simulate has no reboiler at all! I can't find a way to force ASPEN to accept it. And ASPEN of course is right. There has to a reboiler normally, but we have what we have.
What's the way to program this kind of simulation ?
Best regards,