【作者】 李慧芳；

【导师】 王才；

【作者基本信息】 太原理工大学 ， 检测技术与自动化装置， 2007， 硕士

【摘要】 能源短缺是制约我国经济可持续发展的一个重要因素。加热炉是冶金企业最主要的耗能设备。而蓄热式加热炉技术作为《国家鼓励发展的资源节约综合利用和环境保护技术》260项技术之一，具有节能、环保、充分利用低热值煤气的特点，与传统工艺相比，可节能30-40％。蓄热式高温空气燃烧技术能同时降低燃料消耗及有害气体的排放，是保护环境，实现可持续发展的必然要求。蓄热式加热炉控制系统与“直燃式”加热炉有很大的异同，其自动控制策略是一个重要的研究方向。本文以唐山丰南瑞丰薄带有限公司高炉煤气蓄热式加热炉为研究对象，根据蓄热式加热炉每燃烧2-5分钟，就要有一次换向燃烧动作的燃烧特点。通过对各种控制方式的分析与比较，结合蓄热式加热炉的燃烧特点，采用了脉冲燃烧控制方式对系统的自动控制进行了设计、编程及调试。可编程逻辑控制器(PLC，Programmable Logic Controller)因其高可靠性和较高的性价比，在工业控制中被广泛应用。监控组态软件也以其具备的实时多任务、接口开放、使用灵活、功能多样、运行可靠等特点而具有很强的实用价值。该项目采用德国Siemens公司的S7-300系列PLC，以现场工业总线MPI网络为基础，运用与之相配的STEP7编程软件，通过STL和LAD两种编程语言编制了下位机的控制程序，并以组态王为监控软件构成了一个分布式控制系统，从而实现了自动控制。该系统主要由四部分组成：现场仪表，PLC，上位机和人机界面HMI。系统目前已经投入运行，从实际应用的情况来看，系统运行稳定可靠，炉温达到了稳定、均匀的要求。而且该系统控制精度高，操作系统简便，易于现场技术人员的操作和控制。从而保证了蓄热式加热炉生产的顺利进行，并提高了产能和降低了能耗。本文的科研工作为深入研究蓄热式加热炉控制系统提供了重要的指导意义和现实意义，具有很强的实用价值。更多还原

【Abstract】 The lack of the energy sources has already restricted the sustainabledevelopment of domestic economy. As one of the main energy-consumingequipment in metallurgy enterprise, Regenerative heating furnace technologytakes as one of the "the State-encouraged Technology Development forComprehensive Utilization and Conservation of Resource and EnvironmentalProtection", which consists of 260 items. It has the characteristics ofenergy-saving, environmental protection, and making full use of low BTU gas;compared with the traditional process, it can save 30-40％energy. HTACtechnology can also reduce fuel consumption and noxious gas discharging,protect the environment and meet the necessary requirements of the sustainabledevelopment.Compared with the "direct-fired" heating furnace, the regenerative heatingfurnace control system has very great differences, its automatic control strategyis an important research direction. This article takes the gas regeneration typeheating furnace of Tangshan Fengnan Ruifeng strip Co.Ltd as the researchobject. According to the characteristics of reversing combustion of the regenerative heating furnace every 2-5 minutes, analysised and compareed toeach kind of control mode, union the regenerative heating furnace burningcharacteristic, the pulse burning control strategy is adapted to design,programming and debugging of the control system.Because of the high reliability, low cost and high performance, PLC hasbeen widely used in industrial control. Supervisory control and data acquisition(SCADA) software has important practical value for its features of real-timemulti-task, opening interface, flexible and diverse functions, high reliabilityetc.S7-300 series PLC made by Siemens Ltd. Germany was adopted, based onMPI field-bus network, and STEP7 programming software, STL and LADprogramming languages are also adopted to achieve the control of the process;constituted a distributional control system, thus has realized the automaticcontrol. This system is mainly composed of four parts: Field Instruments, PLC,PC and HMI.The system has been put into operation; according to the situation of thepractical application, it’s stable and reliable; and the furnace temperature isstable and uniform, reaches the requirements; moreover, the system can achievehigh-precision control, The operating is simple and it is easy to operate in theindustry field by the technical staff; thus ensures the Smooth production ofregenerative heating furnace, increases productivity and lowers energyconsumption. The research work of the control system for regenerative heatingfurnace in this paper provides important guidance and practical significance for an in-depth study, and it has strong practical value.更多还原