Simulation Of Reactive Distillation Process

As a technical means of process strengthening,reactive rectification couples chemical reaction and rectification separation,so that the reaction and separation process can proceed simultaneously.Now reactive rectification technology has been successfully applied in the process areas of esterification,etherification,hydrogenation,hydrolysis,isomerization and saponification,and has achieved tremendous economic benefits.It has become a research hotspot in the field of process strengthening in recent years.There is a complex influence between the reaction and the distillation separation process,which increases the complexity of the system.Often,small changes in the operating parameters will have an unpredictable effect on the reaction distillation process,making the design and amplification of reactive distillation technology in industrial research.And optimization problems,but objectively promoted the development of reactive distillation simulation.Through the mathematical simulation of the reactive distillation process,the relationship between the test results and the estimated variables can be more accurately predicted,and it has an important guiding role in the design and optimization of the development process of the reactive distillation technology.In the development environment of Visual Studio 2005,this article uses COM interface technology and C ++ language to develop a reactive distillation unit module that supports the CAPE-OPEN interface standard,which is used in the simulation calculation of the reactive distillation process.First,through a systematic study of the reactive distillation process,the functions of the reactive distillation module were clarified,and based on the reactive distillation process principle,a mathematical model of the reactive distillation process was established.In order to better simulate complex reaction systems,the reaction models of the reaction distillation process are divided into three types: specified conversion reaction type,kinetic reaction type and chemical equilibrium reaction type.Secondly,by researching and summarizing the existing solving algorithms for the reactive distillation process,the inside-out method is selected as the solving algorithm for the reactive distillation mathematical model,and the initial value estimation method suitable for the simulation of the reactive distillation process is adopted to improve the stability of the calculation convergence Sex.Then,according to the collated mathematical model and solving algorithm,the development of the reactive distillation unit module is programmed to verify its effectiveness,and the dll file generated by the compilation is loaded into the chemical simulation software that supports the CAPE-OPEN standard.The call and operation of the reactive distillation module were completed.Finally,taking the isopropyl acetate reaction rectification tower,high-pressure depropanizer tower and ethyl acetate reaction rectification tower as examples,the three reaction types of the developed reaction rectification module were verified,and the results showed that: the main process indicators The calculation result is close to the actual measurement value,and the temperature and vapor-liquid flow distribution of the tray are close to the Aspen simulation result,the deviation is within 5%,the calculation result is accurate and reliable,and it can be used for the mathematical simulation of the reactive distillation process.The reactive distillation module developed in accordance with the CAPE-OPEN standard can accurately simulate many different types of reactive distillation processes,and has important practical application value,promoting the development of domestic chemical process simulation software.In addition,the developed module components have a neat structure,strong compatibility,and are independent of each other,which is convenient for future maintenance and improvement.