摘  要：锅炉是工业生产中最为重要的动力设备，锅炉控制系统的好坏直接决定了工业发展的快慢，我国绝大多数锅炉的控制系统自动化水平都较低，资源消耗量大，设备对比发达国家显得比较落后，影响了中国实体经济前进的步伐，增加锅炉控制自动化水平的任务迫在眉睫。锅炉汽包水位的控制是锅炉控制系统中的关键一环，也是较难的一环。在倡导绿色发展的今天，提高锅炉汽包水位控制系统的自动化水平，提升资源利用效率，增强锅炉运行的安全性，具有十分重要的意义。

本文以蒸汽锅炉为对象，以蒸汽锅炉的工艺流程与结构为基础，创立了一系列以IPC+PLC为基础的蒸汽锅炉汽包水位自动化监管系统。这项设备利用了著名品牌西门子的S7-300系列PLC的相关器材，设备配置了SM321系列的DI/DO模块与AI/AO模块、PS307 10A电源模块等模块，用STEP 7来制作锅炉汽包水位自动化控制系统的梯形图。并用三冲量串级控制来维持汽包水位的稳定，在一定程度上消除了“虚假水位”对于锅炉汽包水位的不利影响。这项工程的上位设备将利用DELL 控制设备，并且利用了MCGS 7.2形成相关的运行空间，具体形成了锅炉总貌、参数设置、水位报警、实况数值查询等一体化的功能界面，此项设计能够基本形成一定的界面提示、实况数值监管、控制参数设定与调整、数据管理等功能。使用STEP 7软件来完成系统通信网络的建设， MCGS以及PLC 的动态设计的通信交流在工业以太网上完成。

该论文有图20幅，表4个，参考文献30篇。

关键词：PLC  PID  MCGS  汽包水位  锅炉

Boiler drum water level control system based on PLC

Abstract：The boiler is the most important power equipment in industrial production. The good or bad of the boiler control system directly determines the speed of industrial development. Most of the boiler control systems in our country are low in automation level, the consumption of resources is large, and the equipment contrasts with the developed countries. The task of increasing automation level of boiler control is imminent. The control of boiler drum water level is a key link in the boiler control system, and is also a difficult link. It is of great significance to improve the automation level of boiler drum water level control system, improve the efficiency of resource utilization and enhance the safety of boiler operation in today's green development. In this paper, based on the process flow and structure of steam boiler, a series of integrated steam boiler drum water level monitoring system based on IPC+PLC is established in this paper. The equipment uses the related equipment of the famous brand SIEMENS S7-300 series PLC. The equipment is equipped with SM321 series DI/DO module and AI/AO module, PS307 10A power module and so on, and uses STEP 7 to make the design map of the boiler drum water level integration supervision. And using the three impulse cascade supervision mode to maintain the smooth operation of the drum water level, to a certain extent, to a certain extent, a radical cure of the "false water level" for the boiler drum water level supervision of the design concept. The upper equipment of this project will use the DELL control equipment, and use the MCGS 7.2 to form the related operating space, and form the functional interface of the boiler area, the reference value, the system forecast, the actual value, and so on. This design can basically form a certain interface prompting, actual numerical control, base. This data collation and reference, numerical monitoring and other functions. The STEP 7 system is used to carry out the Internet Design of system information, and the dynamic communication between MCGS and PLC is completed on Industrial Ethernet.

Key Words: PLC   PID  MCGS  boiler  Drum water level