DISTILLATION CALCULATION BY A SUCCESSIVE RELAXATION METHOD WITH SIMULTANEOUS CORRECTION OF LIQUID COMPOSITION AND TEMPERATURE

Abstract

A new, simple relaxation method is proposed for solving nonideal multicomponent distillation problems involving multiple feeds and sidecut streams. The new algorithm is developed from the Gauss-Seidel method to correct simultaneously liquid composition and temperature on each plate and employs a new sequence for stagewise calculation for speedup.
Without any tedious formulation the proposed algorithm reduces greatly the number of iterations and the computation time required for convergent solution. Numerical examples are solved by the proposed method to demonstrate its usefulness and stability.