Three-phase column (decanting) simulation

feed -> organic + aqueous distillate + bottoms (heterogeneous azeotrope)

Parameters

same params as distillation; the overhead is condensed and decanted (UNIFAC LLE) into an organic + an aqueous distillate for heterogeneous azeotropes (water + hydrocarbon/alcohol). Outlets: organic, aqueous, bottoms (aqueous empty if the overhead is a single liquid). Reports heterogeneous_stages (miscibility-gap trays). rigorous_stages=true makes the interior MESH three-phase-aware (tie-line vapor in the gap) at extra cost — needed only near a plait point; strongly immiscible systems need only the decant