@论文TE过程及故障诊断方法研究

I摘要化工生产过程是复杂的动态系统,该生产过程一般是在高温高压、低温真空、有毒或腐蚀性等极端条件下进行的,生产系统和设备一旦发生故障，将会造成经济损失，甚至造成人员伤亡和环境污染。利用故障诊断技术提高系统的可靠性和安全性，已经引起了企业和学术界的高度重视，并在该研究领域取得了丰富的研究成果。本文主要对田纳西－伊斯曼过程(Tennessee-EastmanProcess,TEP)进行了模拟与仿真研究。首先在查阅文献基础上对故障诊断方法进行了概述。并对TE过程中的五大操作单元进行了研究。其中包括反应器、冷凝器、汽/液分离器、压缩机及汽提塔五大操作单元。在此基础上，对主元分析的故障诊断法的原理和算法进行了研究，并以TE过程为背景,调用其化工过程数据，编写MATLAB程序实现T2图、Q图以及贡献图，采用主元分析法对TE过程进行了仿真实验研究，证明主元分析方法的有效性。关键词：TE过程;故障诊断;模拟;T2统计;Q统计IIAbstractThechemicalproductionprocessisacomplexdynamicsystem.Theprocessisgenerallycarriedoutundertheextremeenvironmentwhichmayhavehightemperature,highpressure,low-temperaturevacuum,poisonorcorrosivenessetc..Whentheindustrialproductiondevicesresultinfault,itwillbringeconomicallossorevencausehumaninjuriesandenvironmentalproblems.Improvingthedependabilityandsecuritydependingonfaultdiagnosistechnologyispaidattentionbycompaniesandresearchers,lotsofachievementshavebeenobtainedinfaultdiagnosisfield.ThisthesismainlyimitateandstudiedtheTennessee-Eastmanprocess(Tennessee-EastmanProcess,TEP).ThendescribedthatfivebigoperationelementsinTEprocess.Inwhichincludingreactor,condenser,steam,fluidseparator,compressorandstripperfivebigoperationunit.MethodhascarriedoutclassificationonTEprocessandthemalfunctiondiagnose.Inthisfoundation，studiedtheprincipalcomponentanalysismethod.TakingtheTEprocessasanapplicationbackground,weprogrammedtheMATLABalgorithmofPCA,drawedtheT2statistic、Qstatisticandcontributionmap,provedthevalidityofthemethod.Keywords:TEpross;Faultdiagnosis;imitate;T2statistic;QstatisticIII目录1绪论......................................................................................................................................11.1课题的意义和研究现状................................................................................................11.2计算机模拟方法及故障诊断方法................................................................................31.2.1计算机模拟方法.....................................................................................................31.2.2故障诊断方法.........................................................................................................41.3本文的主要研究工作....................................................................................................52TE过程................................................................................................................................62.1TE过程简介...................................................................................................................62.2反应器............................................................................................................................62.2.1工业反应器的类型.................................................................................................72.2.2釜式反应器的结构.................................................................................................92.2.3反应釜的操作方式...............................................................................................102.2.4连续釜式反应器数学模型及最佳操作...............................................................112.3冷凝器..........................................................................................................................122.3.1冷凝器的分类.......................................................................................................132.3.2水冷式冷凝器主要数学模型...............................................................................152.4分离器..........................................................................................................................152.4.1气/液分离器..........................................................................................................162.4.2气/液旋流分离器.................................................................................................162.5压缩机..........................................................................................................................182.5.1压缩机的种类.......................................................................................................182.5.2离心式压缩机.......................................................................................................182.6汽提塔..........................................................................................................................212.6.1汽提塔的主要部件...............................................................................................212.6.2管式汽提塔...........................................................................................................223TE过程的模拟与仿真实验研究......................................................................................243.1TE过程模拟.................................................................................................................243.2TE过程仿真研究.........................................................................................................293.2.1TE过程模拟图.....................................................................................................293.2.2仿真实验......................................................................................................