高炉布袋除尘的MCGS-PLC控制系统.doc

内蒙古科技大学
本科生毕业设计说明书(毕业论文)
题目:高炉布袋除尘的MCGS-PLC控制系统
——PLC程序控制
姓名:卢彪
学号:2003053219
专业:测控技术与仪器
班级:测控03级2班
指导教师:燕芳讲师
高炉布袋除尘的MCGS-PLC控制系统
——PLC程序控制
摘要
随着科学技术的迅速发展,人民生活水平的不断提高,对环境保护的要求也日益严格。高炉炼铁所产生的高炉煤气,经煤气系统回收,清洗,除尘,降压后送至高炉热风炉和各用户使用。从高炉炉顶排出的荒煤气不仅含有大量灰尘,而且温度较高,所以,必须对荒煤气进行除尘降温。目前,电除尘器和布袋除尘器的效率较高,能确保达到排放标准。电除尘器的应用很广,而布袋除尘器目前国内应用较少,但因其性能优越而日益受到重视,具有广阔的应用前景。布袋除尘系统中脉冲电磁的动作由一块集成电路板进行控制。该集成电路板安装在除尘箱旁边的电柜里,所处的环境比较恶劣,温度高,灰尘多。因此,在生产过程中该电路时常会出现故障,影响除尘系统的正常运作。本设计利用 PLC程序中含有脉冲信号输出的功能指令,设计一个 PLC程序来实现按一定差压控制或按一定时间间隔依次输出脉冲信号的功能,来替代原系统中的集成电路板,其它外部装置不变,就可以使整个布袋除尘系统正常工作。采用SIMATIC S7-300 系列模板,高炉扩展模板之间用光缆连结,实现PLC自动控制调节。
关键词: 高炉 PLC 布袋除尘 S7-300
Blast furnace hop-pocket dust separating MCGS-PLC control system
--PLC program control
Abstract
Along with the rapid scientific and technological development, The people's living standard continues to improve, Of the environmental requirements are increasingly strict. blast furnace arising from the blast furnace gas, gas recovery systems, cleaning, dust sent to the relief after the hot blast stove and the users. Emitted from the furnace top gas shortage not only contains large amounts of dust and high temperatures, so have to dust for raw gas cooling. Currently, ESP and bag filter more efficient, ensures meet emission standards. ESP's application is very broad, bag filter applications currently less, but because of superior performance and growing in importance have broad application prospects. baghouse ic pulse system moves from one IC to control plate. The integrated circuit boards installed in the dust bins next to the filing -- and in the context of the environment was quite poor, high temperatures, more dust. Therefore, in the production process of the circuit often failures, dedusting system affect the normal operation. The design PLC program contains pulse signal output function directive Design of a PLC program to achieve a certain differential pressure control or by a certain time interval followed pulse output signals, to replac