Academic
Publications
PROCEDURES FOR MINIMUM REFLUX RATIO CALCULATION AND FOR THE OPTIMIZATION OF DISTILLATE FLOW RATE IN DISTILLATION COLUMNS

PROCEDURES FOR MINIMUM REFLUX RATIO CALCULATION AND FOR THE OPTIMIZATION OF DISTILLATE FLOW RATE IN DISTILLATION COLUMNS,J. A. Reyes-Labarta,A. Gómez,

PROCEDURES FOR MINIMUM REFLUX RATIO CALCULATION AND FOR THE OPTIMIZATION OF DISTILLATE FLOW RATE IN DISTILLATION COLUMNS  
BibTex | RIS | RefWorks Download
This poster presents a design method of multicomponen t distillation columns that offers the possibility of solving the equilibrium equations and the mass and enthalpy balances by a rigorous method and different approximate methods, optimizing, by the simplex algorithm, the distillate flow rate for a specified product separation and calculating the number of stages and the optimum feed location. New methods for the calculation of the minimum reflux ratio for multicomponent distillation columns are also presented. The main problem involved in the rigorous calculation of the minimum reflux ratio is the great number of iterations involved, each one requiring the calculation of a distillation column. Nevertheless, this search can be orientated and simplified on considering the conditions that must be fulfilled in such an operating condition. In accordance with this, four different methods have been suggested, based in the desig method of distillation columns for multicomponent mixtures. DESIGN METHOD One problem to be solved in the design of multicomponent distillation columns is that the composition of the calculated residue by the tray-to-tray procedure does not match that obtained by the material balances and, consequently, the calculation is not correct and an iterative procedure must be devised. In the present poster, the tray to tray methods proposed by Marcilla et al. (1996) for calculation of multicomponent complex distillation columns, are applied for the design of a rectifier; including an analysis of the optimum feed location, through the optimization of the distillate flow rate, for a specified product separation, leading to a residue composition equal to that obtained by material balances. The first step of the proposed procedure involves t he calculation of the range of possible design variable values (D-values) from the mass balances, and the second step, to calculate the optimum D that satisfies the material balance. To calculate this D optimum, the SIMPLEX method of convergence is used (Himmelblau, 1968), that optimizes this parameter by minimization of the objective function selected as the distance between the composition of the liquid phase from the last calculated stage (bottom product), x (i) , and the composition of the bottom product obtained from an overall mass balance (xR (i) ):
Cumulative Annual
View Publication
The following links allow you to view full publications. These links are maintained by other sources not affiliated with Microsoft Academic Search.