How does HYSYS tower simulation handle three-phase problems?
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When using HYSYS to simulate crude oil stabilization, if the water content of the crude oil is relatively high, a three-phase calculation issue arises in the tower calculations. How do people deal with this?
It seems it should be handled like in a normal-pressure tower top – by checking the three phases. It’s not clear whether HYSYS supports the detection of the aqueous phase in other types of trays besides condensers; in Pro11, a different algorithm is required.
In HYSYS, the software can automatically check for the presence of free phases. Additionally, HYSYS provides a calculation model for three-phase distillation columns, which you can give it a try
Simulation of three-phase fractional distillation columns and extractive distillation columns is possible in HYSYS under steady-state conditions. I am also confused by the question raised by the original poster; specifically, when it comes to dynamic simulation, it is not easy to carry out calculations using the absorption column modules that we commonly use in cases where there are three phases present. Are there any better modules?
Adding a water draw to the condenser makes it easier for the simulation to converge.