Research On The Temperature Control System Of The Reactor

With the development of science and technology and economics, the molecular polymer is of great use for every field. At the same time, high need for to fulfil higher production quality requirements and automatization of polymerization process. At present, the polymerization of polymer is largely by batch chemical reactor, account for 90%. Of all the parameters(such as temperature, pressure, flux, speed) of to have influence on the polymerization in production run, temperature is the most important parameter, deciding on the quality and output rate. The process of polymerization is both the chemiscal reaction process and the physical change process, the mechanism of polymerization is very complex. The process of polymerization have much to characteristics such as noninear, time-varying, noise and delay . And it is very difficult to establish the accurate mathematical model of the object. It is also very difficult to control the temperature of the industry process using the classical PID control theory. This dissertation is devoted to controlling the temperature of reactors. The temperature variational characteristics and controlling difficulty of reactors have been analyzed comprehensively. Then we summarize why currently controller can not accurate control temperature. With the result that the improved Smith predictor algorithm-integral separated subsection antisaturation position-type PID algorithm are put forward in this paper, and this design reduces overshoot, greatly decreases static error and settles up the problem of reactors temperature control. The design and debugging of the hardware circuit and the whole software, as well as the editing, the tuning and the debugging of the control algorithm are achieved. And the experiments is used to substantiate the efficiency of this control-system. The experiments show that the control system operates steadily and have high functional reliability, and that the algorithm not need the accurate mathematical model of the object and have good flexibility, operational capability and high robustness. The control effect is favorable.