Research On Control Strategy Of Lignite Drum Drying System

Lignite is a kind of high moisture content, high porosity, high volatile, low calorific value, high water content of lignite, which contains different amounts of humic acid. Therefore, the lignite drying system control of the lignite industry is of great significance.The control system of the lignite drying system is very important to the whole control process. In this paper, we try to simulate and fuzzy control as the core, and through the main station on line detection system temperature and oxygen, to discuss how to control the valve opening degree and control system temperature and oxygen demand, to meet the needs of the power station.In this paper written in and tries to start from the temperature and oxygen, several methods were used to explore how to effectively prevent the drying process。 This thesis is expected to solve the main problems:(1)By analysising the control circuit,I found there is a coupling relationship between several parameters. Propose decoupling control method. Propose a new method based on the fuzzy control technology applied to the control of the key parameters of lignite drying. Analysis its possibilities.(2) Using the fuzzy logic toolbox of Matlab and Simulink tool to solve the problem of fuzzy PID control and oxygen concentration fuzzy control system of flue gas temperature, the control effect of fuzzy controller is verified.(3) By a classification of the control system of lignite drying key parameters in an attempt to take advantage of design related software control interface and data acquisition interface, in station machine communication and fuzzy control algorithm and its optimization control strategy.In this paper, we hope to solve the problem of the practical operation of the lignite drying system by theoretical and practical research.