基于三菱PLC的水泥厂窑头喂煤系统设计毕业设计洛阳理工学院.docVIP

基于三菱PLC的水泥厂窑头喂煤系统设计 摘 要 随着建筑行业的不断发展，其对水泥产量和质量的要求也越来越高。水泥煅烧是水泥生产过程中及其重要的部分，喂煤系统中煤粉的连续、均匀喂料是煅烧工作的基础。 由于国外喂煤系统控制的核心、编程语言及许多元器件国内没有替代品，日常难以维护，因此本设计将采用国内的高性价比元器件和通用的三菱PLC代替国外喂煤系统中的部分。 本喂煤系统控制目标是能够向窑头连续、均匀的喂煤，并实现5‰的喂煤精度。本设计以三菱PLC为控制核心，转子秤通过称重传感器测出其中煤粉的重量，同时转子盘的旋转速度也通过变频器得出，PLC通过高速脉冲测量单元和A/D转换单元将煤粉的重量和速度的转化为数字量，经系统运算处理后得出煤粉瞬时流量，并与给定量进行比较，再经PID算法，最终达到瞬时流量跟踪给定流量的最佳控制效果。 关键词：转子秤，PLC，PID，喂煤系统，A/D转换 The cement kiln head feeding coal system based on mitsubishi PLC design ABSTRACT With the continuous development of construction industry, the requirement for the production and quality of cement is becoming more and higher. And cement calcination is crucial steps in the process of cement production; coal feeding system of the continuous, uniform feeding is the basis of calcination work. Because there is no domestic substitute for foreign coal feeding system control core, program languages, and many devices .It is difficult to maintain daily, so this design will use domestic cost-effective components and universal parts of the Mitsubishi PLC instead of feeding coal system abroad. The kiln head control goal of the coal feeding system is to be able to continuous and uniform feeding coal, and implement 5 ‰ precision of feed coal. This design use Mitsubishi PLC as the control core, the trochanter through weighing sensor to measure the weight of the rotor in the pulverized coal, at the same time, the rotating speed of rotor drum through transducer, PLC use high-speed pulse measurement unit and A/D conversion unit converted weight and speed to digital quantity, and after the system processing coal instantaneous flow, and comparing with quantitative, then through PID algorithm, and finally achieve the optimal control of a effect that transient flow tract given flow. KEY WORDS: Rotor balance，，，oal feeding system，A/D conversion目　录 前　言 1 第1章 概述 2 1.1研究的现状 2 1.1.1 水泥产业发展现状 2 1.1.2 水泥生产喂煤装置简介 2 1.2研究的意义 3 1.2.1 传统水泥生产喂煤装置 3 1.2.2 新型水泥生产喂煤装置的研发意义 4 1.3设计方案 4 1.4论文的主要工作及章节安排 5 第2章 控制原理与总体设