RH真空处理装置预热枪控制系统

来源期刊：冶金自动化2009年第3期

论文作者：秦斌 高爽 张文锋

文章页码：37 - 40

关键词：预热枪系统； 串级PID控制； 温度曲线； 烘烤模式； RH真空处理装置

Key words：preheating burner system； cascade PID control； temperature curve； baking mode； RH vacuum degassing device

摘    要：RH预热枪系统的主要功能是烘烤真空槽和浸渍管。系统由基础自动化级和过程控制级两级系统构成,其中基础自动化级采用西门子PLC控制器和WinCC上位监控站。在分析了预热枪的工艺过程和控制要求的基础上,实现了按流量模式和曲线加热模式烘烤真空槽的功能。针对温度控制系统的大滞后特点采取了温度-流量串级PID控制方案,严格控制真空槽的升温速度,使真空槽的升温过程符合耐火材料的特性,达到了温度的精确控制。该系统已投入使用,运行情况良好。

Abstract: Main function of RH preheating burner is to bake vacuum tank and impregnation pipe.The system consists of basic automation level and process control level.In basic automation level,Siemens PLC controller and WinCC upper layer supervising station were adopted.Based on analysis of preheating burner process and control requirement,baking function of vacuum tank was achieved according to flow mode and curve heating mode.Because of large time delay of temperature control system,temperature-flow cascade PID control method was applied.To satisfy heating characteristics of refractory materials,it is necessary to control temperature rising rate of vacuum tank strictly.Therefore,precise control of temperature was achieved.The system has been put into operation,and operates in good state.