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1、 基于 PLC 的水泥工艺煤磨段自动控制系统设计设计说明煤粉制备在工业生产中有重要作用，被广泛应用于冶金、矿山、电力、水泥等行业。传统煤粉制备控制系统，具有控制点少、靠人工测量、手动操作等特点，随着生产规模的不断扩大和产量的提高，控制系统的处理量不断增大，以往人工现场控制手段己很难满足生产的要求，同时由于人工检测误差大，控制设备落后、安全性低，给整个系统的生产操作和管理带来了很大的困难。根据我国的水泥生产发展现状，本文以水泥工艺煤粉制备系统为研究对象，分析并设计了基于 PLC 的水泥工艺煤磨段自动控制系统。本文介绍了我国的水泥煤粉制备自动化现状和水泥工艺煤磨段的设备构成及工作原理，分析了煤磨段
2、中需要控制和监视的对象，以球磨机负荷为控制对象，重点从上位系统和下位系统介绍了控制系统的设计过程。下位系统的设计通过对煤磨段的工作原理分析，确定系统的 I/O 点数，进行 PLC 的选型与硬件配置，绘制程序流程图，并完成程序的编写；上位系统的设计通过 WinCC 进行变量的建立、人机监控画面的设计；并且详细介绍上位系统和下位系统的通讯和连接。论文最后对系统进行调试和运行，分析系统可实现的功能，并总结系统设计过程中的主要工作内容。关键词：煤磨段；PLC；自动控制；WinCC；监控第 1 页Design of Cement Process Coal Mill Period Automatic Co
3、ntrol System Based on PLCDesign DescriptionCoal preparation in industrial production has an important role, is widely used in metallurgy, mining, the electric power, the cement industry, etc. Traditional pulverized coal preparation control system, have less control points, by artificial measurement,
4、 manual operation characteristics, such as the production scale to expand and increase yield, the control system of the productivity increase, and the control methods have artificially before it is difficult to meet the requirements of production, and because the artificial error detection, control
5、equipment backward, safety is low, to the whole system of production operations and management brought great difficulties. According to Chinas cement production development present situation, this paper in cement process coal preparation system as the research object, the analysis and design of proc
6、ess based on PLC cement grinding coal for automatic control system. This paper introduces the preparation of pulverized coal in China cement status and cement process automation coal mill equipment for components and working principle and the analysis of the coal mill paragraph need to control and m
7、onitoring of the object, by the ball mill load is the object of control. Focus from upper system and a system introduced the design of the control system of process. The design of the system through the position of coal mill segment of the working principle analysis, confirmed the system I/O points,
8、 the selection of the PLC hardware configuration, draw the program flow chart, and completed the writing of the program. The upper the design of the system through the establishment of the variable WinCC, man-machine monitoring menu design. Detailed introduces the upper system and a system of commun
9、ication and links. 第 2 页Final paper on the system commissioning and operation, this paper analyzes the system can realize the function, and summarizes the system in the process of design work. Key Words: cement craft coal rubs；PLC；automatic control；WinCC；monitor目录1 绪论 .11.1 项目背景、意义.11.2 煤粉制备控制系统的现状.
10、11.3 论文设计内容.22 PLC 和 HMI 基础及应用 .42.1 可编程控制器基础.42.1.1 PLC 简介 .42.1.2 西门子S7-300 PLC .42.2.3 PLC 在水泥自动化的应用 .62.3 人机界面基础 .72.3.1 WinCC 概述 .72.3.2 WinCC 的组态及应用 .83 控制系统总体设计 .93.1 煤磨段的工艺流程.103.2 煤磨段系统的控制要求.113.3 煤磨段中球磨机负荷的控制要求.123.4 煤磨段自动控制系统的总体设计.123.5 控制系统各部分功能.134 现场 PLC 控制站设计 .154.1 系统中 I/O 点数的选取.15第
11、1 页4.2 S7-300 PLC 的选型与硬件配置.224.2.1 STEP7 简单介绍 .224.2.2 PLC 型号的选择 .254.3 PLC 控制器的设计.304.3.1 基于 PLC 的闭环控制系统 PID 算法 .304.3.2 PID 控制及参数整定 .304.4 主程序的编写.314.4.1 地址分配 .314.4.2 程序流程图设计 .314.4.3 程序的仿真 .315 上位 WINCC 监控站设计 .395.1 人机界面（HMI）设计.395.2 变量设置.436 系统调试及分析 .496.1 上下位的连接与调试.496.2 控制回路的运行.616.3 运行结果分析.647 总结 .667.1 论文的主要工作.
