The calculating the characteristics of vapor-liquid feed at the mobile control of rectification processes
Journal Title: Комп’ютерне моделювання: аналіз, управління, оптимізація - Year 2017, Vol 1, Issue 1
Abstract
The paper presents mathematical and algorithmic bases for calculating the static characteristics of the multicomponent rectification process, taking into account the mobile control actions of different intensity. Since mobile control consists in switching or redistributing the feed flow between the contact devices of the column, the intensity of such an impact is determined by the characteristics of the raw material entering on separation. The problem of calculating the phase composition of the feed flow, the proportion and enthalpies of each phase, the total enthalpy of feed based on the measurement information on temperature, consumption, the composition of the feed and the pressure in the feeding line is solved. The solution algorithm contains two iteration cycles. The outer cycle is designed to calculate the fraction of the liquid phase in the feed, the internal one allows to determine the compositions of the vapor and liquid phases using the phase equilibrium model. In calculating the enthalpy of the liquid phase, the activity coefficients of the components are used, which ensures the applicability of the algorithm in the modeling of azeotropic mixtures. The choice of qualitative initial approximations of the unknown quantities is theoretically justified, which makes it possible to abandon the laborious methods of iterative calculations in favor of the fixed-point iteration method. The results of simulation performed using the presented algorithm on examples of rectification columns for separating a binary methanol-water mixture and a ten-component mixture of methyl tert-butyl ether (MTBE) products prove that the use of the feed temperature as the intensity of the mobile effect on the rectification process provides the necessary heat load of the column.
Authors and Affiliations
А. Р. Шейкус, И. Л. Левчук, В. Я. Тришкин
Keywords
Related Articles
- EP ID EP642522
- DOI -
- Views 105
- Downloads 0
Software for design systems of fuzzy control and conducting fuzzy-multiple calculations
The paper suggests a description of the design concept and ways to implement the library to work with data that are fuzzy. Based on a review of the latest researches in the field of fuzzy calculations, we formulated the...
Численная эффективность метода точной квадратичной регуляризации
В данной работе рассматриваются методы решения многоэкстремальных задач в конечномерном евклидовом пространстве. Такие задачи возникают при математи- ческом моделировании сложных систем в экономике, финансах, управлении,...
Расчет характеристик парожидкостного питания при подвижном управлении процессами ректификации
В работе представлены математические и алгоритмические основы расчета стати- ческих характеристик процесса многокомпонентной ректификации с учетом подвижных управляющих воздействий различной интенсивности. Так как подвиж...
Проектирование и безопасность беспроводных локальных вычислительных сетей
В представленной статье приведены результаты исследования беспроводных локальных сетей. При проектирование и эксплуатации беспроводных сетей следует уделять большое внимание защите информации. Технических проблем сетей м...
Stochastic modeling of high-molecular substances electrophoresis using the Ornstein-Uhlenbeck process
The aim of the work is to develop a statistical model in the form of the Ornstein-Uhlenbeck trend process for describing the electrophoresis of high-molecular substances. The ability of electrophoresis to divide charged...