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论文编号:ZD1373 论文字数:16277,页数:38
论文题目： PLC200在电厂小型锅炉控制系统中的应用
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。
本文基于西门子的S7-200 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。
关键字： PLC电气控制系统；
论文类型:应用研究
Abstract
on-line control of coal flow is an important link. And It becomes a deserve research of topic. that how to guarantee the credibility of equipments operation , reduce the operational person and improve the economic performance, 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 microcomputer technology ,automation technology and communication 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 become a robust tool to realize automation.
This paper takes SIEMENS S7-200 PLC as designing the some large boiler provide warm losing the coal control electricity system.The 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 relation, being start some set to lose the coal equipments, from that equipments below process of end lose the coal equipments start heading up pursue class start, then can make finally that set equipments start;When the stop some set loses the coal equipments or some set equipmentses to break down, from that equipments up the source head of the process starts get down for the coal equipments to pursue the class to park the car, then can make that set equipments stop finally.Thus, guaranteed the normal movement that last coal deliver, avoid the leather belt up the pile up of coal, also protected the leather belt. Lose the coal distance to control the system with the PLC, not only carried out the automation management that equipments circulate and supervision, raise the credibility and safeties of the system, but also improved the work environment, raise the business enterprise economic performance and work efficiencies. therefore the system bears certain practical applying significance and popularizing value .
Key words: PLC Electrical Control System；
目 录
1 绪论 1
1.1 综述 1
1.2 可编程控制器技术的发展 2
1.3 课题背景 3
1.4 设计的主要内容 4
2 锅炉的控制原理与系统设计框架 5
3.1 锅炉系统的概况 5
2.2 输煤设备的工艺简介 7
2.3 输煤系统的控制原理 8
3 PLC200可编程控制器 10
3.1 PLC200的概述 10
3.2PLC的基本组成 10
3.3 PLC的主要特点 11
3.4本设计PLC的选型及其特性介绍 12
4 系统硬件的设计 17
4.1 锅炉控制系统的硬件设备 17
4.2 锅炉控制系统硬件设备的控制方式 21
5 系统调试 30
5.1 硬件调试 30
5.2 整体调试 30
5.3 调试结果 31
5.4 调试中遇到的问题及解决方法 31
6 结论与展望 32
致 谢 33
参考文献 34
