推鋼爐過程控制系統設計

電氣自動化論文編號:ZD154    論文字數:13205,頁數:32

 目     錄
1 摘    要 I
2 Abstract II
1  緒論 1
1.1課題背景及競義 1
1.2 國內外加熱爐計算機控制系統研究和應用現狀 2
1.3  本文的主要工作 3
2加熱爐控制系統設計 4
2.1加熱爐工藝優化 4
2.2  燃燒系統設計 5
2.3  爐壓控制設計 7
2.4  溫度檢測設計 8
2.5  流量檢測控制設計 9
3 雙交叉限幅的改進 11
3.1  控制系統工作原理 11
3.1.1  PID控制原理及特點 11
3.1.2  PID調節概述 12
3.1.3 基于MATLAB /Simulink環境下的PID參數整定 13
3.2  過程建模目的和要求 15
3.2.1  過程建模目的 15
3.2.2  過程建模的要求 15
4  應用MATLAB對加熱爐燃燒控制系統進行仿真 17
4.1  建模思想 17
4.2  算法說明 17
4.3 在Matlab中對工藝過程參數建模 19
4.4  限幅器S函數 20
4.5  仿真結果 24
結  論 27
致  謝 28
參考文獻 29

摘    要
隨著我國經濟的迅速增長，伴隨著現代工業自動化水平的提高，能源短缺已成為目前社會各界關注的焦點。鋼鐵工業降低能耗不僅是中國節能減排工作的需要，也是鋼鐵工業自身提高效益、實現可持續發展的要求。加熱爐是冶金企業主要的過程設備，其自動控制策略是過程控制領域內的一個重要的研究方向。如何使自動控制系統能夠確保鋼坯的加熱質量、節約加熱爐的能耗沖惻夢系統的最佳燃燒、延長”加熱爐設備的壽命一直是該研究領域主要的研究內容。我國經濟正蓬勃發展,鋼材需求旺盛，設計一套合理的加熱爐燃燒控制系統有其巨大的經濟效益，節能、環保意義。本設計以加熱爐達到充分燃燒，提高熱效率為目的。通過實施加熱爐在線燃燒控制來保證空燃比的精度，進而實現節能、環保意義。設計中主要著重考慮加熱爐工藝知識，應用自動化控制原理構建一套合理的加熱爐燃燒控制系統，通過PID參數整定達到最佳燃燒的控制目的。然后應用MATLAB仿真軟件中的工具Simulink工具箱對加熱爐燃燒控制系統進行仿真驗證系統的可行性。

關鍵詞：加熱爐；燃燒控制；雙交叉限幅；節能
Design of Pusher-furnace Process Control System
                      Abstract
With rapid growth in economy and the enhancement of the industrial level, energy shortage becomes the current focus society pay attention to. The steel industry reducing energy consumption in China is not only need of energy-saving and emissions-reducing, but also the requirement of improving its efficiency and achieving sustainable development in the section of iron and steel industry. Furnace is major energy-consuming equipment in rolling production process. How to guarantee the heating of slabs can be effectively rolled and reach an aim to save-energy, which is the direction that we pursuit in the field of metallurgical automation. Chinese economy is growing fast and a lot of steel material is needed, therefore, design of a reasonable burning-control-system of furnace is significant in economy, energy saving and environment-protection. This article takes the full burning and high heating efficient as aim, implement air-fuel-ratio control online to ensure the best burning, energy saving and environment-protection. In the design-heating furnace craft knowledge is mainly considered, applying automated control principle the constructs a set of reasonable combustion control system of heating furnace, and using PID parameter tuning achieves the best burning. Finally, applying Simulink toolbox of the Matlab simulating software makes the simulation of burning-control-system of heating-furnace and verifies the system availability

Key words：Heating Furnace；Burning-control；dual-cross-limit； energy-saving