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espanolEn esta investigacion se aporta el estudio en estado dinamico de un tren de destilacion multicomponente del area de recuperacion de solvente de una planta de polietileno lineal. Esto se realizo a traves de una simulacion dinamica en Aspen Plus® con la finalidad de predecir el comportamiento de las variables operacionales al momento de ocurrir una interrupcion del flujo de alimentacion al area de destilacion para modelar una parada del area de reaccion, para luego establecer procedimientos que compensen las desviaciones en las variables controladas. El modelo termodinamico que mejor reprodujo los datos fue SRK-BM. Los resultados mostraron una desestabilizacion de los controladores de nivel de las columnas A y B, asi como tambien un desplazamiento del perfil de temperaturas de la columna A a valores mayores, 14 oC aproximadamente. La columna C no presento desviaciones de sus variables. Para estabilizar el sistema fue necesario realizar tres pasos que involucran el cambio a modo manual y del porcentaje de apertura de la valvula de los controladores de flujo de vapor a la columna A (50 %), de presion del separador D-101 (50 %) y el controlador de flujo de tope de la columna B (43 %). EnglishThis research provides the dynamic analysis of a distillation train, which instead of the traditional study of a binary mixture, this was carried out for a multicomponent mixture of the solvent recovery area of ​​a linear polyethylene plant. This was done through a dynamic simulation in Aspen Plus® with the purpose of predicting the behavior of the operational variables (temperature, pressure, flow, level or composition) when an interruption of the feed flow occurs in the distillation area to model a reaction area shutdown, and then establish procedures that compensate for deviations in the controlled variables. Several thermodynamic methods were evaluated: Soave-Redlich-Kwong, Peng-Robinson, Lee-Kesler-Plock, Peng-Robinson-Boston-Mathias y Soave-Redlich-Kwong-Boston-Mathias; the SRKBM method was chosen, since it presents lower error percentages in most of the estimated properties. This rigorous comparison adds greater reliability to the values reported in the simulations. The results showed a destabilization of the level controllers of distillation columns A and B, in addition to an increase of approximately 14 ° C in the temperature profile of column A. Column C did not show deviations from its operational variables. Finally, to stabilize the system, it was necessary to carry out three steps involving the switch to manual mode and changing the valve opening percentage of the column A steam flow controller (50%), the D-101separator pressure (50%) and the column B top flow controller (43%).

Análisis del control dinámico de un tren de destilación multicomponente del área de recuperación de solvente de una planta de polietileno lineal.