加热炉温度控制系统.doc

PAGE PAGE II 内蒙古科技大学毕业设计说明书（毕业论文） 加热炉温度控制系统仿真 摘 要 本设计是以钢铁公司加热炉控制系统为背景展开的, 加热炉是冶金行业中的重要热工设备，消耗的能量占到钢铁工业总能耗的25%[1]，其出钢温度是影响后续工艺的关键因素。因此本设计以控制温度为核心。在钢铁冶金行业竞争日趋激烈的今天，如何实现加热炉的有效控制，有着重要的意义。加热炉控制的难点和重点在于其燃烧过程是受随机因素干扰的、具有大惯性、纯滞后的过程，本设计将对加热炉控制的关键问题：燃烧控制、温度控制以及空燃比优化等进行研究，因此，本设计主要涉及以下几点：1.采用炉温燃烧串级控制方式实现温度的自动控制。2.在现有几种燃烧控制方法的基础上，提出了双边限幅控制。3.提出了变空燃比的控制。4.运用MATLAB软件对温度控制系统进行了较为全面的仿真和性能分析。 关键词：加热炉；炉温燃烧串级控制；双边限幅控制；变空燃比的控制；仿真 Abstract The design is based on iron and steel company’s furnace control system to start background, the metallurgical industry furnace is the important thermal equipment, the energy consumption of the iron and steel industry accounted for the total energy consumption of 25%, its steel temperature is the follow-up of the key factors. Therefore the design controlled the temperature of the core. Metallurgical industry in the increasingly fierce competition today, and how to realize the effective control of furnace, is of important significance. Furnace control difficult and the focus of the combustion process is subject to the random interference with great inertia, pure delay the process, the furnace design will control the key issues. It contents combustion control, temperature control and air-fuel ratio optimization study and, therefore, the design relates mainly to the following points: 1. using combustion temperature cascade control method of temperature control. 2. Several of the existing combustion controlling methods on the basis of bilateral limiting controlled. 3. Change of the air-fuel ratio control. 4. Using MATLAB software on the temperature control system for a more comprehensive simulation and performance analysis. Key words: Furnace; Combustion temperature cascade control; bilateral limiting control; Change the air-fuel ratio control; MATLAB Simulation 内蒙古科技大学毕业设计说明书（毕业论文） 目 录 TOC \o 1-3 \h \z \u 摘 要 II Abstract III 第一章 绪论 1 1.1概述 1 1.2国内外现状 1 1.3本设计的研究内容 2 1.4小结 3 第二章 加热炉工艺简介 4 2.1加热炉工艺流程 4 2.2加热炉工艺要求 5 炉膛