蓄热式加热炉智能控制方法研究定稿.doc

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1、蓄热式加热炉智能控制方法研究摘要蓄热式加热炉是上世纪90年代逐步出现的钢材热轧生产线主要热工设备，其对钢材加热质量的好坏直接影响钢产品质量。特别是在能源日益紧张的今天，如何进一步提高产品质量，同吋降低能耗具有更加重要的意义。蓄热式加热炉与传统加热炉相比具有一些优点，比如工艺温度更高，能回收更多烟气热焙，低氧燃烧污染小，热效率高等；可是，蓄热式加热炉也有一•些缺点。比如蓄热式加热炉的预热段难以控制，炉尾烟气易超温，严重时甚至烧坏换热器管道，引起故障停工。蓄热室的尾部烟气也容易超温，严重吋烧坏换向阀；由于加热炉木身的大惯性，非线性，多变量，控制木身就具有

2、复杂性，蓄热式加热炉的操作更加复杂。蓄热室的换向操作过于频繁且本身也存在延吋，这不仅造成不同负荷下蓄热式加热炉火焰宽度难以控制，炉温调节不连续，另外也造成换向阀磨损加剧，寿命减少。本文以蓄热式加热炉为研究背景，简单介绍了蓄热式加热炉概况和模糊理论控制的相关原理。同时也简要介绍了PTD札I关原理、模糊PTD控制器以及将这种智能方法应用到蓄热式加热炉的炉温控制屮去解决一些实际问题。关键词:蓄热式加热炉;智能控制;PID控制;模糊控制;温度控制；口整定Researchonintelligentcontrolmethodofregenerativerehea

3、tingfurnaceAbstractRegenerativereheatingfurnaceismainheatingequipmentwhichhasjustacceptedby1990'sinrollingindustry.Thequalityofbilletheatinginithasadirecteffectonproductqualityandreduceenergyconsumeismoreimportant・Comparedwithtraditionreheatingfurnace,regenerativereheatingfurna

4、cehasitsadvantages,suchashightechnologicaltemperature,recyclingmoreenergyfromwastegas,lessNOxpollutantsoflowoxygencombustion,highthermalefficiency;howeverithassomedisadvantagessuchaspreheatsegmentcontrolproblem,ovcr-tcmpcraturcoffurnaceentrysegmentwhichmaycausetheburningbreakof

5、heatexchangerpipeandfailuretime・Wasteoutofregeneratormayalsobecomeover-temperatureandcausedamageofreversingvalveBecausereheatingfurnaceisanonlinear,multivariableandlargeinertiasystemcontrolbecomecomplicated・Controlofregenerativereheatingfurnaceismorecomplicated.Frequentactionso

6、freversingvalvenotonlycauseflamewidthofregenerativereheatingfurnacehardtocontrolindifferentloadanddiscreteoffurnacetemperatureregulatebutalsowearofreversingvalveandshortlifespan.Regenerativewalkingbeamfurnacefortheresearchbackground,abriefintroductionofthecontrolprincipleofrege

7、nerativereheatingfurnaceprofilesandfuzzytheory.AlsobrieflyintroducedthePTDoftherelevantprinciple,thefuzzyPIDcontroller,andthisintelligentmethodisappliedtothefurnacetemperaturecontroloftheregenerativefurnacetosolvesomepracticalproblems.Keyword：Regenerativereheatingfurnace；Intell

8、igentcontrol；PIDcontrol;fuzzycontrol;temperaturecontro