本科毕业设计__火电厂烟气脱硫装置自动控制系统分析.docVIP

吉林电子信息职业技术学院 毕业论文（设计） 题 目： 火电厂烟气脱硫技术 系 部： 电气工程学院 专业班级： 13发电02班 指导教师： 宋 宇 姓 名： 姜晓辉  摘 要 本论文简要阐述了烟气脱硫的目的，比较了湿法、干法、半干法脱硫的优缺点，论证了石灰石-石膏湿法烟气脱硫技术是脱硫效率最高且最常用的方法，分析了湿法烟气脱硫的工艺过程。介绍了烟气脱硫装置的运行参数检测和控制及连锁保护。特以韩城第二发电厂为例集中分析。经FGD处理后的烟气达到国家环保标准，其效率达95％以上。根据湿式石灰石烟气脱硫工艺及方案，文中给出以参与采集数据与过程控制的可编程控制器（PLC）为现场控制级，通过以太网技术搭建集散式控制系统，并以MCGS组态软件实时监控系统的设计方案。其中，针对湿式石灰石-石膏烟气脱硫过程具有的大惯性、时滞，非线性等特点，利用PLC的PID算法实现烟气脱硫中的吸收塔ph控制与流量控制。MCGS作为上位机软件提供友好的用户界面，实现了运行参数流程与列表数据显示。 关键词：石灰石-石膏湿法烟气脱硫；吸收塔；石灰石；烟气脱硫 Title：Flue gas desulfurization technology in thermal power plant Abstract This paper briefly expounds the objective comparison of flue gas desulfurization, wet, dry, semi-dry desulfurization advantages and disadvantages, discusses limestone - gypsum wet flue gas desulfurization technology is the desulfurization efficiency is highest and most commonly used method, analysis of wet flue gas desulfurization process. Introduces the flue gas desulfurization device operating parameters detection and control and interlock protection. Special to the Hancheng second power plant is exemple concentration analysis. After treatment of FGD flue gas to reach the national environmental protection standards, its efficiency is more than 95%. According to the wet limestone flue gas desulfurization process and scheme, is presented in this paper in order to participate in the data collection and process control of the programmable logic controller ( PLC ) for field control level, through the Ethernet technology to build distributed control system, and MCGS configuration software real-time monitoring system design. Among them, the wet limestone gypsum flue gas desulfurization process with great inertia, time delay, nonlinear, using PLC PID algorithm in flue gas desulfurization absorption tower pH control and flow control. MCGS as a host computer software