Virtual Instrument In The Non-fiber Polyester Simulation And Training System

Polymerization product is an important material for producing weave, industry-using synthetic fiber and fiber used to produce bottle. It has much relationship to people's life, and is used very widely. The characteristic of polymerization process is complicated chemical-change mechanism, long time delay, nonlinear, time varying and so on. In order to enhance the stability of producing equipments, train the new workers before or during sentry post for getting enough knowledge of the real product system and operation experience, developing a simulation training system for non-fiber polymerization product is very meaningful.The core of the training system is foundation of process model. On the basis of knowing the technics of polymerization product, mechanism of polymerization change and the DCS control system, author brings up DCS control models of 33 monitored points and the proposal of tuning controlled argument, display and keeping or taking out of process variable. Also, author brings up the soft measure calculation models of quality quotas at the each reactor outlet, such as ratio of esterification, consistency of COOH, viscosity, quantity contained of DEG.Virtual instrument technique has powerful functions of process simulation, data collection, display and analysis. It has been used widely in industrial product, research and teaching. On the base of models built ahead, the paper takes the real product technics process as background, combines the virtual instrument technique and polymerization technics, designs the front panel of the training system and relative program using LabVIEW - a graphic computer language.Paper tests the training system, analyzes the stability of training system, the affect of technics condition's change to the quality quota. The result of test indicates that the system developed by this paper reflects the real product technics, and the model build for the system is suitable to real product situation. The development of the training system is beneficial for enhancing the stability of product equipments and improving the operation skills of new workers.