plc控制图
基于PLC的锅炉控制系统研究
Research on boiler control system based on PLC
摘要
锅炉作为一种能源转换设备在如今各类工业生产中起到了非常重要的作用,成为不可或缺的组成设备之一。现在面临的问题是锅炉本身和控制系统已经不能满足现代化工业发展的需求。我国工业基础相对落后,大多数中小型锅炉,实际上仍旧采用的是仪表、继电器控制形式,有的甚至还停留在人工操作阶段,自动化水平落后,因此控制精度和安全性均不能满足现代工业生产的需求。锅炉是一个多变量输入输出的控制系统,控制精度和自动化水平是衡量锅炉性能的重要参数,拥有较高的控制精度和自动化控制水平,意味着能源的高效利用和资源的节约,同样对锅炉的安全稳定性有着重要的意义。本以蒸发量1th中小型锅炉作为研究对象,综合锅炉的工作原理和实践可行性,设计一套基于PLC的蒸汽锅炉自动控制系统。
关键词:锅炉控制PLC
Abstract
As a kind of energy conversion equipment, boilers are very important components in all kinds of industrial enterprises nowadays. With the rapid development of modern industry, the boiler itself and control system have also been improved correspondingly. However, the industrial base of our country is relatively backward. Most small and medium sized boilers, in fact, are still used in the form of instrument and relay control, and some even still remain in the stage of manual operation, the level of automation is backward, Therefore, the accuracy and safety of control can not meet the needs of industrial production.As a multivariable input and output control system, improving the precision and automation level of its control is not only to improve the conversion of energy and the rational utilization of resources, but also to the safety and reliability of the boiler. This paper takes the small and medium boiler of 1th as the research object, and combines the working principle and practical feasibility of the boiler, and designs a set of automatic control system of steam boiler based on PLC.
Keywords oiler control PLC
目录
摘要i
Abstract ii
1绪论1
1.1课题研究背景和意义1
1.2工业锅炉控制系统的发展历程2
1.3我国工业锅炉发展现状: 3
2蒸汽锅炉的组成4
2.1蒸汽锅炉结构图4
2.2锅炉辅助设备: 4
2.2.1燃料供应设备4
2.2.2送、引风设备4
2.2.3除灰渣设备5
2.2.4汽、水系统设备5
2.2.5烟气净化系统设备5
2.2.6仪表及自动控制系统设备5
3控制任务分析6
4现场仪表选型8
4.1 PLC的选择8
4.2变频器的选择10
4.3传感器的选择11
4.3.1锅炉水位传感器11
4.3.2温度传感器13
4.3.3压力传感器15
5锅炉控制系统设计17
5.1控制设备组成17
5.2控制系统功能18
6电路设计19
7程序设计21
7.1 XY输入输出表分配表21
7.2液位梯形图22
7.3压力梯形图23
7.4温度梯形图23
7.5程序仿真25
结论27
致谢28
参考文献29
24V电源图
plc输出灯
plc输出线圈
plc输入
变频器
变压器图1
变压器图2
变压器图3
控制电路图
温度模块
系统接线图-电气原理图
显示器
压力模块
主电路图
总电源保护
24V电源头副本
设计摘要部分
设计字数统计
设计目录
设计所包含文件