华南铜铝业退火炉炉组改造系统设计

发布时间：2018-04-03 21:24

本文选题：退火炉　切入点：PROFIBUS-DP　出处：《南昌大学》2016年硕士论文

【摘要】：华南铜铝业四台退火炉炉组的PLC自动控制系统是该企业生产部门的一个很重要的控制系统,以此为背景,在原有的退火炉炉组控制系统上进行了一系列的技术改造,设计了一个高度自动化、运行安全可靠,具有环保节能功能以及高度控制精度的退火炉炉组控制系统。本设计主要包含定时、定温控制、温度曲线校正控制、结束控制、炉门逻辑控制、循环风机和加热晶闸管控制等主要控制系统。详细设计了系统的硬件和软件部分,为确保退火炉温度控制的快速、准确和稳定,设计了基于参数模糊自调整的整定办法,给出了温控系统的模糊PID控制器。本系统采取PLC的主从站控制的方案。从站上热电偶对温度进行检测,获取炉体上不同位置传感器传送过来的信号,顺利地避开了模拟信号长距离传送的过程中出现的各种干扰。系统采用基于PROFIBUS-DP的工业总线网络,采用CPU315—2DP作为主站,ET200M充当接口、总线协议桥以及触摸屏等构成从站,可以顺利实现PLC主从站、变频器和触摸屏等设备之间的通信。采用MODBUS作为通信协议,通过PROFIBUS-DP总线系统实现变频器远程监控。这套系统已经在清远市华南铜铝业有限公司现场运行并使用,改良后的系统能实现高精度的温度控制,整个退火工业过程中本系统有着可靠稳定的控制性能,同时操作系统容易掌握,值得在冶金行业的生产中予以推广。
[Abstract]:The PLC automatic control system of four annealing furnaces in South China Copper and Aluminum Industry is a very important control system in the production department of this enterprise. Based on this background, a series of technical revamping has been carried out on the original annealing furnace group control system.A high automatic, safe and reliable control system for annealing furnace is designed, which has the function of environmental protection and energy saving and high control precision.This design mainly includes timing, temperature control, temperature curve correction control, end control, furnace door logic control, circulation fan and heating thyristor control and other main control systems.The hardware and software of the system are designed in detail. In order to ensure the temperature control of the annealing furnace is fast, accurate and stable, a fuzzy self-tuning method based on parameters is designed, and the fuzzy PID controller of the temperature control system is given.This system adopts PLC master-slave station control scheme.The temperature is detected by thermocouple from the station, and the signals transmitted by different position sensors on the furnace body are obtained, thus avoiding all kinds of interference in the long distance transmission of analog signals.The system adopts the industrial bus network based on PROFIBUS-DP, CPU315-2DP as the main station and ET200M as the interface, bus protocol bridge and touch screen as slave station. The communication between PLC master station, inverter and touch screen can be realized smoothly.MODBUS is adopted as communication protocol and remote monitoring of inverter is realized by PROFIBUS-DP bus system.The system has been operated and used in Qingyuan South China Copper and Aluminium Industry Co., Ltd., the improved system can achieve high precision temperature control, and the system has reliable and stable control performance during the whole annealing process.At the same time, the operating system is easy to master, and it is worth popularizing in the production of metallurgical industry.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG155.92

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