火电厂碎渣机电气控制设计

论文编号:DQ308   论文字数:8539,页数:25 CAD图

摘     要
 本次设计是在浙江华电环保系统工程有限公司结合实际生产而设计的。碎渣机是火电厂和其他燃煤企业的重要锅炉除渣设备。由于燃烧的煤种不固定，锅炉排渣量大，容易出现 硬渣块，捞渣机在运行中，经常出现硬渣块卡塞，造成捞渣机减速箱齿轮断裂或球式联轴器变形等故障。因此进入碎渣机的渣块也经常卡塞铰刀齿处，导致碎渣机跳闸等故障频繁发生。严重影响了正常的生产。
 改进后的碎渣机是综合研究了目前国内多种先进的碎渣机，在分析了除渣系统的实际过程的基础上而设计出来的。而从世界范围来看，PLC是用的最多、应用范围最广的自动化产品，也可以说是最实用的自动化产品。本设计是PLC在电机控制方面的一个应用，因为用PLC来实现自动有很多优点，可使系统的硬件设备大为简化，体积减小，而且PLC的抗干扰能力强，可靠性高，操作维护简单。所以本次设计选用西门子S7-200PLC为主要控制器件，通过外加一个模拟量扩展模块从而提高了机器对故障的报警和处理能力。
 改进后的碎渣机可以单机使用，也可以集成在锅炉除渣系统中，配合自动捞渣机，这样将大大提高锅炉除渣的自动化程度，而提高生产能力。
关键词：碎渣机、PLC、S7-200、故障、

Abstract
 The design is environmentally friendly project in Zhejiang Huadian in light of the realities of production and design.Crusher of the coal-fired thermal power plants and other business-critical boiler slag handling equipment. As the burning coal is not fixed, boiler slag discharge a large quantity, prone to hard slag block, fishing residue in the machine running, often hard slag block Kasai, resulting in fishing gear boxes slowdown Slag fault or deformation of the ball coupling , And other failures. So into the Crusher  of the slag block often Kasai reamer teeth, resulting crusher machine failures, such as frequent tripping. Seriously affected the normal production.      The improved Crusher aircraft comprehensive study of the current domestic range of advanced Crusher  machine, analysis of the Cleaner system on the basis of the actual process designed by. From the view of the world, PLC is the largest, most extensive scope of application of automation products, but also can be said to be the most practical automation products. This design is PLC in a motor control applications, because the PLC to automatically use a lot of advantages, the system would greatly simplify the hardware equipment, the volume decreases, and PLC''''s anti-interference capability and high reliability, operation and maintenance Simple. Therefore, this design selected Siemens S7-200PLC as the main control device, plus a simulated through the extension of the machine so as to enhance the fault of the police and handling capacity.     The improved Crusher  single machine can use, can also be integrated in the boiler slag handling system, automatic fishing Slag, which would greatly enhance the boiler Cleaner degree of automation, and enhance productivity.
Key words: Crusher, PLC, S7-200, failure,

目  录
中文摘要 I
英文摘要 II
目录 III
第一章     绪论 1
 1.1   碎渣机的概念 1
 1.1.1  碎渣机的组成  1
     1.1.2   碎渣机的参数 1
 1.2   研究动机与目的 2
第二章     软件和硬件的组成 3
 2.1   PLC的选型 3
2.1.1  PLC的特点和优势 3
2.1.2  西门子S7-200的特点 5
     2.2   S7-200开发环境简介 6
2.2.1  开发软件STEP7-Micro/WIN32 6
2.2.2  STEP7-Micro/WIN的安装 6
2.2.3  STEP7-Micro/WIN的功能 7 
 2.3   扩展模块 8
第三章     电气控制的总体设计 11
 3.1   控制系统供电 11
 3.2  硬件配置  11
3.2.1  PLC配置 11
3.2.2  输入输出地址分配 12
 3.3  主程序设计 14
3.3.1  软件设计 14
3.3.2  程序梯形图 16
 3.4   系统安装和调试 19
     3.4.1 系统的安装 19
     3.4.2 系统的调试 21
第四章     总结 23
   致谢 24
参考文献 25