《基于PLC的锅炉供暖输煤电气控制设计说明》由会员分享，可在线阅读，更多相关《基于PLC的锅炉供暖输煤电气控制设计说明（47页珍藏版）》请在金锄头文库上搜索。
1、论文某大型锅炉供暖输煤电气控制 徐兴 燕山石化炼油厂摘 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，设计了某大型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
2、：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
3、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 “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, become a deserve researc
4、h 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 microcomputer technology ,automation technology and communication technology. It is applied v
5、ery 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 OMRON CPM1A PLC as desig
6、ning 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
7、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 th
8、e 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, av
9、oid 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 w
10、ork environment, raise the business enterprise economic performance and work efficiencies. therefore the system bears certain practical applying significance and popularizing value . Key words: Boiler； PLC Electrical Control System； On-line control of coal flow 目录绪论.5第一章 工艺要求. .71.1锅炉系统概况. 71.2输煤系统工艺简介.10 1.3控制原理.11第二章 控制器部分.12 2.1控制方式论证.12 2.2PLC选型.15第三章 执行器部分.16 3.1输煤机的选择.16 3.2破碎机的选择.173.3皮带机的选择.183.4熔断器、电缆截面的选择.183.5接触器的选择.223.6低位煤发生器，压力传感器.23第四章 PLC控制设计.24第五章 总结.38第六章 结束语.39参考文献.39附录.
