【作者】 杜勇刚；

【导师】 刘白雁；

【作者基本信息】 武汉科技大学 ， 机械电子工程， 2007， 硕士

【摘要】 加热炉作为钢铁工业轧钢生产线的关键设备和能耗设备,钢坯温度的优化设计和加热炉自动化控制水平直接影响到能耗、烧损率、废钢率、产量、质量等指标。为了实现高效节能、减少污染的目标,轧钢加热炉将向自动化和计算机控制方向进一步发展。PCS7作为面向过程控制的软件开发平台,已经在越来越多的工业控制领域应用。它提出了一种全集成的自动化解决方案,可以为所有的自动化应用提供统一的技术环境。工程技术人员可以在一个平台下对所有应用进行组态和编程,真正体现了计算机自动化控制的特点。本文以武钢轧板厂2#步进式加热炉改造项目为背景,论述了在PCS7平台下,如何对加热炉这个复杂的工业系统进行计算机控制,为类似的工业过程计算机控制设计提供了借鉴。文章从分析步进式加热炉工艺着手,对加热炉的主要设备,如装钢机、步进梁、液压系统、汽化冷却系统和公辅设施的控制要素和控制特点进行了分析,根据上述分析利用S7-400编程软件完成了PLC程序的整体设计。本文第四章根据加热炉的工艺和设备分布特点,在WinCC环境下,组态了加热炉部分监控画面,并阐述了WinCC如何与S7-400进行通讯。文章第五章分析了加热炉一个具体子环节汽化冷却系统水位控制的控制策略,对一种更为先进的专家控制方法进行了探讨,最后一章对全文进行了总结。更多还原

【Abstract】 Since reheating furnace is the key and energy-consuming facility in the steel-rolling production line in the iron and steel industry, the optimum design of the temperature of billet steels and the automation control degree of the reheating furnace will influence such targets as energy consumption , steel scrap rate , steel output , product quality and so on directly. To achieve higher efficiency with less energy and to lessen pollution as well, reheating furnace used in the steel rolling will be improved towards automation and computerized control. PCS7 has been applied in more and more industral control areas as a kind of procedure-oriented software development platform. It has advanced a sort of completely-integrated automatic sollution and can provide all kinds of automation applications with a uniform technical circumstance.Engineers or technicians can configurate and programme in the same platform for all kinds of applications and the characteristics of computerized controls can be demonstrated fully.The paper has discussed how to control reheating furnace,which is a complicated industrial system, with computers in the PCS7 platform ,and the improving project to the 2# walking beam reheating furnace in the plate rolling mill in Wuhan Iron and Steel Company has constituted its background. The paper has offered much useful advice to the analogous designs of industrial computerized process controls as well.The paper has started with the analysis to the technology of the walking beam reheating furnace ,which has covered the control elements and characteristics of the main facilities such as steel loading machine,walking beam,hydraulic system,gasification cooling system and common assistant facilities .And then on the basis of the analysis above ,the entire design of PLC programmes has been finished with S7-400 programme softwares.According to the technology and distribution characteristics of the heating furnace,the chapter 4 has configurated parts of monitered frames of the heating furnace in the WinCC circumstance,and then represented how to realize practical communication between WinCC and S7-400.The chapter 5 has analyzed the controlling strategy to control the water level of the gasitification cooling system of a specific subsegment in the reheating furnace,and then explored a more advanced specialist controlling approach.The last chapter has made a conclusion to the whole paper.更多还原