Development Of Simulation Training System For Styrene Unit

The thesis is about the work of developing styrene unit simulation training system for HuaBei Petro-Chemical Corporation Styrene Plant with an annual output of 80,000 tons of styrene.Developing styrene unit simulation training system based on Process System Simulation Platform (PSSP) includes two main work, system modeling and virtual DCS development. System modeling is calling the existing modules from the module base of PSSP and adding the unique modules of styrene unit to the module base, then connecting them to build a system model. Virtual DCS development is to configure the virtual DCS and site operation interfaces and link interfaces to system model for data exchanging.This thesis introduced principles of building general modules, such as the pipe network module. It also detailed the distillation column and ethylbenzene dehydrogenation reactor modeling principles. According to distillation process dynamic characteristic, the distillation column can be divided into several sections. Each section is a virtual stage which has its own vapor-liquid phase equilibrium equation for dynamic behaviors modeling. The complexity of ethylbenzene dehydrogenation reaction was simplified, when the process was treated as a main reaction with two secondary reactions on the basis of ethylbenzene dehydrogenation reaction kinetics. And the computation load was reduced without computational accuracy loss. The application of styrene unit simulation training system showed the simulation result was very close to the design data and met the requirements of simulation training system. Because the system model was established on the basis of process mechanisms, its operation has good dynamic characteristic and was identical with the actual process with a certain range. It is helpful to entirely understand the process mechanism and improve operation skills to trainees.