青岛理工大学毕业论文摘 要本文通过对循环流化床的启动过程分析，为实现用可编程控制器（ PLC）完成对此过程的自动控制，以安全启动和减轻人工负担为双目标，利用梯形图编写了 PLC 的控制程序。以 240t/h 锅炉为例，选取合适的模拟量输入模块，以达到基于对锅炉点火温度及炉膛温度实时监测下的安全启动过程。常规控制系统采纳继电器控制，元器件较多，控制线路复杂，抗干扰能力差，增加了故障点，维护和维修不方便。而利用 PLC 程序对锅炉启动进行控制，不仅有效简化控制线路，提高系统的抗干扰能力。方便现场的维护和维修，又可以简化操作，并且可以充分保证点火成功率。关键词：循环流化床锅炉，可编程控制器，控制程序ABSTRACTBy the start of the circulating fluidized bed process analysis, to achieve the use of programmable logic controller (PLC) automatic control of the completion of this process in a safe start-up and reduce the manual burden for the two-goal,the use of the preparation of the PLC ladder diagram control procedures. To 240t / h boiler as an example, select the appropriate analog input module, in order to achieve based on the boiler furnace ignition temperature and the temperature under the real-time monitoring of the safety of the startup process. Conventional control system to control the use of relays, components are more complex control circuit, poor anti-interference ability, an increase of the point of failure, 下载后可任意编辑maintenance and repair is not convenient. Procedures for the use of PLC control of the boiler to start, not only simplifies the control circuit to improve the system of anti-interference ability. To facilitate maintenance and repair of the scene, but also can simplify the operation, and can fully guarantee the success rate of ignition.KEY WORDS：CFB,programmable logic controller, control procedures2下载后可任意编辑目 录摘 要.....................................................................
