加热炉温度控制系统设计与仿真研究_毕业论文设计.doc

内蒙古科技大学 本科生毕业设计说明书（毕业论文） 题 目：加热炉温度控制系统设计与仿真研究 加热炉温度控制系统设计与仿真研究 摘 要 关键词：；；Temperature Control of Heating Furnace System Design and Simulink Study Abstract In the enterprises where producing iron and steel, in order to heat up billet to the technological requirements of rolling, the temperature inside the furnace must be controlled effectively so that it remains in a specific range. Maintaining the temperature needs the stable burning of fuel inside the furnace. Furnace combustion process is a non-linear process which is subject to the random interference, great inertia and the pure time delay. The design for the furnace combustion control system is mainly on the control of a single-loop control programme, the ratio of cascade control system, control system limiting unilateral, bilateral limiting control system, and analyses each of the control programme on theory. Using MATLAB software makes a more comprehensive simulation and performance analysis on the temperature control system. Through analysis and comparison we can conclude that bilateral limiting control system is superior to others in the furnace temperature control. The temperature control system of bilateral limiting control system makes gas flow and air flow restrict on each other, which not only prevent the burning of black smoke, but also prevent the excess air, to reach the purposes of controlling the furnace temperature, enhancing the rate of combustion gas and avoiding pollution and others.　 Key words: furnace; single-limiting control; bilateral-limiting control; MATLAB Simulation 目 录 摘 要 I Abstract II 第一章 绪论 1 1.1 概述 1 1.2 国内现状 2 1.3 本设计的研究内容 2 第二章 加热炉工艺简介 3 2.1 加热炉的组成 3 2.2 加热炉的温度加热方式 3 2.3 加热炉工艺流程 3 2.4 加热炉温度控制要求 5 2.4.1 燃烧系统 6 2.4.2 炉膛负压 7 2.5 空燃比 8 第三章 加热炉的温度控制系统 10 3.1 单闭环控制系统 11 3.2 炉膛负压控制系统 12 3.3 串级比值燃烧控制系统 13 3.4 单交叉限幅燃烧控制系统 15 3.4.1 单交叉限幅燃烧控制系统工作原理 15 3.4.2 单交叉限幅燃烧控制系统特点 17 3.5 双交叉限幅燃烧控制系统 17 3.5.1 双交叉限幅燃烧控制原理图 17 3.5.2 双交叉限幅燃烧控制系统的工作原理 18 3.5.3 双交叉限幅燃烧控制特点 20 第四章 加热炉温度控制系统仿真 23