基于三维模糊PID控制策略的水泥分解炉温度控制系统研究

Temperature control system for cement decomposing furnace based on three-dimensional fuzzy and PID control strategy

本文分析了水泥回转窑分解炉生产工艺,阐述了生料流量、煤粉和三次风配比与分解炉温度之间的关系,以下料量、三次风压和主排风机风速与设定值的偏差为输入量,炉温为控制量,设计出基于三维模糊控制和PID控制策略串级应用相结合的水泥分解炉温度控制系统。在该温度控制系统中,依据模糊控制理论,结合人工经验和现场要求得出控制规则,对煤粉阀门进行控制,其中三维模糊控制器设定分解炉温度,PID控制器对温度实施精确控制,使分解炉温度保持在设定温度的2.5%范围内波动。现场实际运行结果表明,该控制系统大大提高了分解炉喂煤的控制精度,运行稳定可靠,具有良好的控制效果,能够满足现代工艺的要求。

In the paper the production technology of cement rotary kiln decomposing furnace is analyzed and the relationship between material flow, coal powder, tertiary air flow and temperature of decomposing furnace is discussed. The temperature control system for cement decomposing furnace based on three-dimensional fuzzy and PID control strategy, which its inputs are material flow deviation, tertiary air pressure deviation and main exhaust fan speed deviation, is developed. In the control system, according to the fuzzy control theory, fuzzy control rules are identified by artificial-control experiences and actual condition requirements to control the coal powder valve, and the three-dimensional fuzzy controller can design temperature of decomposing furnace, PID controller can control temperature precisely within the fluctuate of 2.5%. At last, the practical operation shows that the advanced control system has many advantages including improvement of the feeding coal accuracy, operating steadily, easy realization, and good control result to meet the needs of modern technology.