基于PLC的锅炉自动输煤系统.doc

郑州科技学院
专科毕业设计(论文)

题目基于PLC的锅炉自动输煤系统
学生姓名田锐开
专业班级电气自动化<二班>
学号 200816063
所在系电气工程系
指导教师李月英老师
完成时间年月日

基于PLC的锅炉自动输煤系统
摘要
燃煤输送是锅炉运行的一个重要环节,如何保证设备运行的可靠性、减少操作人员与维护人员劳动强度、提高经济效益,成为一个值得研究的课题. 可编程控制器(PLC)是近年来发展极为迅速,应用面极广,以微处理器为核心,集微机技术、自动化技术、通信技术于一体的通用工业控制装置。它具有功能齐全、使用方便、维护容易、通用性强、可靠性高、性能价格比高等优点,已在工业控制的各个领域得到了极为广泛的应用,成为实现工业自动化的一种强有力工具。
本文基于OMRON公司的CPMIA PLC,设计了某锅炉供暖输煤控制电气系统。各机械之间均设计安全的联锁保护控制功能:系统中的输煤电机启停是有严格控制顺序的,彼此间有相应的联锁互动关系,当启动某台输煤设备时,从该设备下面流程的最终输煤设备开始向上逐级启动,最后才能使该台设备启动;当停止某台输煤设备或某台设备故障时,从该设备上面流程的源头给煤设备开始向下逐级停车,最后才能使该台设备停止。这样,就保证了上煤传输的正常运行在线控制煤流量,避免了皮带上煤的堆积,也保护了皮带。PLC控制系统硬件设计布局合理,工作可靠,操作、维护方便,工作良好。
用 PLC输煤程控系统,不但实现了设备运行的自动化管理和监控,提高了系统的可靠性和安全性,而且改善了工作环境,提高了企业经济效益和工作效率。因此PLC电气控制系统具有一定的工程应用和推广价值。

关键词:锅炉; PLC电气控制系统; 在线控制煤流量
Based On PLC,Boiler Automatic Conveying System
“Abstract”
It is an important link that on-line control of coal flow, how guarantee the credibility that equipments circulate and reduce to operate the personnel and support the personnel the labor strength, raise the economic performance, e a deserve research of topic. Programmable Logic Controller(PLC) is a kind of universal industrial control apparatus which is developed rapidly and used widely in recent years, taking microprocessor as its core , integrating puter technology ,automation technology munication technology. It is applied very diffusely in varied field of industrial control with the characteristics such as all-around functions.
Flexible application, well reliability, high ratio of capability and price and maintenance and so on, having e a robust tool to realize automation.
This paper takes OMRON CPM1A PLC as designing the some large boiler provide warm losing the coal control electricity system can work reliably with property of easy operation and maintenance. The safety locks protection control function:In the system of losing the coal electrical engineering have the strict control in moving and stopping, each other has the homologous lock interaction