双膛石灰窑冗余PLC控制系统的设计与应用

Design and application of redundant PLCs' control system for double-shaft lime kiln

基于某钢厂双膛石灰窑的控制系统设计实例,详述了西门子S7-417冗余PLC在双膛石灰窑电气自动化系统中的设计方案。简述了双膛石灰窑的工艺流程和主要设备,分析了窑膛温度双闭环串级控制系统设计方案以及冷却气、燃料枪冷却气和理论助燃风之间的配比控制方案,详述了上料卷扬机控制原理和变频器参数设置编程方法,给出了煤气加压站控制系统和储运控制系统的主要控制方案,设计了基于冗余CPU、冗余网络、冗余服务器的控制系统总体方案和网络结构,给出了控制系统软件和硬件组成,以及控制系统主要功能。

The automatic control system＇ s design scheme based on the redundant PLCs is described at length according to the designed control system of double-shaft lime kiln. The process flow and main equipment of double-shaft lime kiln are simply introduced. The shaft temperature＇ s double closed-loop control system and the proportional control system among the cooling air, the cooling air from the fuel gas gun and the theoretical combustion air are analyzed. The control principle of loading engine and the parameter set method of frequency converter are described in detail. Gas compression station control system and storage ＆ transportation control system are also given. The control system general scheme and network configuration based on the redundant CPUs, redundant networks and redundant servers is designed. The software composition, hardware composition and the main func- tions of the double-shaft lime kiln control system are given.