圆筒加热炉控制系统研究

Research on control system for cylindrical heating furnace

对圆筒加热炉进行计算机优化控制,采用以出口温度为主调参数,以燃料流量为付调参数,组成串级调节回路以保证出口温度稳定.在优化控制中用常规控制与热效率在线自寻最优控制相结合的方法,组成加热炉热效率最优控制系统,以实现系统热效率最大.控制过程主要是瓦斯流量热平衡控制和过剩空气系数最优控制.实际应用表明,所设计系统方案简单,控制稳定,干扰抑制能力强.

The paper design a optimal control system for cylindrical heating furnace with the outlet temperature as principal control parameter and gas flow capacity as supplementary control parameter. The cascade control loop is used in the system to make the stability of outlet temperature. To get the maximum thermal efficiency of the system, control algorithm adopts the combination of routine control and online self-searching optimal control. The main control processes in the system are thermal equilibrium control of gas flow and optimal control of excess air coefficient. The designed system has been used in practice, the control results show that the scheme is feasible, stable, and able to constrain interference.