步进式加热炉燃烧控制的新方法

针对常规交叉限幅控制方法负荷跟踪速度低的缺点，采用了具有快速补偿响应功能和抗积分饱和功能的改进交叉限幅燃烧控制方法；针对炉温过程具有时变非线性的特性，应用了自整定PID控制算法；针对加热炉下加热段与上加热段炉温对象耦合干扰严重的现象，应用了智能解耦控制方法。实际应用结果表明，该方法可提高加热炉各段炉温的控制精度，获得满足开轧所要求的钢坯温度，并能保证经济燃烧和安全运行。

New Method for Combustion Control of Walking Beam Reheat Furnace

The improved cross limited combustion control method with rapid compensatory response function and anti windup function was used in order to overcome the shortcomings of low load following speed of normal cross limited control method. An auto tuning PID control algorithm was taken in respect of the furnace temperature process that has time varying and nonlinear properties, while an intelligent decoupling control method was applied to decouple the interaction between the low heat zone and the high heat zone. The application results show that the method increases control accuracy of each zone of reheat furnace and obtains the billet temperature that start rolling requires as well as ensures economical combustion and safety operation.