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针对加热炉控制系统中存在的燃烧效率不高,控制响应延迟大的问题。设计了一套基于某公司SIMATIC PCS7控制系统的加热炉燃烧控制策略。系统针对加热炉燃烧控制中的主要参数:物料出口温度,空燃比,炉膛压力分别采用串级双交叉比值限幅控制策略,模糊控制策略和前馈控制策略进行控制。控制过程采用高级多功能过程实训系统(SMPT)仿真加热炉,利用SIMATIC PCS7控制系统实施加热炉的控制方案并利用上位机软件WinCC进行在线的实时监控。控制过程自动运行,根据控制过程和仿真结果表明,方案安全可靠,控制效果和可行性较好。比较于传统的基于数学模型的加热炉控制策略,方案提供了一种新型的控制策略,在很大程度上解决了加热炉燃烧效率不高,控制响应延迟大的问题。
For the heating furnace control system exists in the combustion efficiency is not high, control response delay large problem. A set of heating furnace combustion control strategy based on a company’s SIMATIC PCS7 control system was designed. In this paper, the main parameters in the furnace combustion control system are: outlet temperature of the material, air-fuel ratio and pressure in the heart of the furnace, which are respectively controlled by a series of double crossover ratio limiting control strategy, fuzzy control strategy and feedforward control strategy. Control process using advanced multi-function process simulation system (SMPT) simulation furnace, the use of SIMATIC PCS7 control system implementation of the furnace control program and the use of PC software WinCC online real-time monitoring. The control process runs automatically. According to the control process and simulation results, the scheme is safe and reliable, and the control effect and feasibility are better. Compared with the traditional heating furnace control strategy based on mathematical model, the scheme provides a new type of control strategy, which solves the problem of low combustion efficiency and large response delay in heating furnace.