Intensifying Internal Heat Integration-Synthesis, Design and Control of a High-Purity Ethylene Glycol Reactive Distillation Column
|School||Beijing University of Chemical Technology|
|Course||Control Theory and Control Engineering|
|Keywords||Reactive distillation column Glycol Internal thermal coupling Process Design Dynamic characteristic|
Reactive distillation column reactor operation and the separation operation in a single device , there is great potential for energy savings and economic benefits. At present, some reactive distillation column is indeed better than the conventional process is superior, but they are not the best design, but also very different. The underlying reason is not fully tapped the effect of process intensification , there is no reasonable operations and distillation of the reaction organically combined . In order to help maximize the potential of the reactive distillation column , you must use reinforced design. Heat and heat of vaporization of the reaction ratio of the size of the reactive distillation column may be divided into a large thermal effect, a small thermal effect, no thermal effect categories. Containing a large number of thermal effects of reactive distillation column , Huang Ke honor et al proposed strengthening internal thermal coupling of process intensification based integrated design principles , not only can effectively reduce the reactive distillation column energy consumption and fixed asset investment , but also significantly improve the system dynamic performance. But for the existence of a complex side reactions reactive distillation column , there is no research to strengthen internal thermal coupling. And we know in industry there are adverse reactions , and in these reactions , the reaction must be kept high selectivity . Therefore, this paper choose legal production of ethylene oxide of high purity water glycol reactive distillation column to study the effect of strengthening internal thermal coupling . High purity ethylene glycol distillation column only relative volatility between the reactants greater degree , a highly nonlinear , but there is a cascade -type side reactions need to maintain a high selectivity of the reaction . These will strengthen internal thermally coupled to bring great challenges. Although the high -purity ethylene glycol reactive distillation column has adverse physical and chemical properties , and strengthen internal thermal coupling is still a reactive distillation column reduces energy consumption , lower operating costs, but also improve the system controllability and maneuverability. All findings indicate : whether exothermic reaction , endothermic reaction , serial reaction , parallel reactions , or the serial and parallel mixed reactions , strengthen internal thermal coupling can improve the static and dynamic characteristics , this conclusion contains a lot of thermal effects for the reactive distillation column are applicable . Further explained in the presence of a large number of thermal effects of reactive distillation column necessity of strengthening internal thermal coupling .