燃煤加热炉温度控制系统解耦方法设计

摘要

In view of problems of wasting too much fuel,serious pollution of coal-fired reheating furnace caused by difficult temperature control,a heating system model of coal-fired reheating furnace with multi-temperature zones was established.A feedforward decoupling control method based on PID control algorithm was proposed.The method uses feedforward decoupling control to realize decoupling for coupling parts of each heating channel,which can reduce the time required for the heating system to reach steady state,and uses PID control algorithm to optimize control parameters of the heating system,which can make temperature of the heating system rapidly rise and remain stability in a short time.The simulation and experimental results show that the method can greatly improve temperature control speed,and can achieve stable control accuracy in a shorter response time,which avoids fuel wasting and improves heating rate.%针对燃煤加热炉由于控温难而导致的生产燃料浪费过多、污染严重等问题,构建了多温区燃煤加热炉加热系统模型,提出了一种基于PID控制算法的前馈解耦控制方法.采用前馈解耦控制对多温区加热炉各个加热通道耦合部分进行解耦,减少加热系统达到稳态所需时间;采用PID控制算法对多温区加热炉加热系统控制参数进行优化,从而使加热系统的温度在短时间内迅速上升并保持稳定.仿真与实验结果表明,该方法能够大幅改善温度控制速度,且可以在较短的响应时间内达到稳定的控制精度,避免了燃料浪费,提高了加热速率.