基于炉内温度场可视化的燃烧优化控制方法研究

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1、华中科技大学博士学位论文基于炉内温度场可视化的燃烧优化控制方法研究姓名：王淅芬申请学位级别：博士专业：热能工程指导教师：周怀春20050930浓度的变化之间的关系找出影响锅炉高效低污染物排放的主要因素给出与运行中煤种及负荷相适应的优化运行方式关键词燃烧控制温度分布NOx排放神经网络自适应遗传算法IIABSTRACTAdvancedcombustionmonitorandcontroltechnologycanrealizethehighstability,highefficiencyandlowpol

2、lutionofcombustionprocessinthecoal-firedboiler.Currentresearchachievementsonvisualizationof3-Dtemperaturedistributionsinpc-firedfurnacescanprovidethepracticalbasisfortheapplicationofanewcombustionoptimalcontrolstrategy.Againstthedelay,parameter-distribu

3、tedcharacteristicofthetraditionalcombustioncontrol,anewcombustioncontrolstrategywiththe3-Dtemperaturedistributioninafurnaceasanintermediategoaltocontrolthemulti-burnerboilerispresented.Concerningthecombustionefficiencyandpollutionemissionofutilityboiler

4、s,theintegratedoptimizationofacombustionprocessisstudied.Inthispaper,alinearmodelissetuptorelatethefeaturesofthetemperaturedistributionswiththeinputofthecombustionprocesses,suchasthemassflowratesoffuelandairfedintothefurnacesthroughalltheburners.Afurnac

5、ecombustioncontrolstrategybasedonanadaptivegeneticalgorithm,usingagroupofnewcharacteristicparametersfeaturingthe3-Dtemperaturedistributioninsidethefurnaces,isstudiedbysimulation.Theresultsshowthatthecontrolmethodcouldprovidesuitablecontrolsignalsforthef

6、uelandairmassflowratestochangetheloadlevel,estimatethefailureofindividualburnerandgivecorrectcontrolsignalstodealwithit.Thetemperaturedistributionoptimalcontrolstrategybasedontheadaptivegeneticalgorithmcanbeappliedintothecombustionoftangentiallypc-fired

7、utilityboilers.Anexperimentalstudybasedoncombustionadjustmentwasconductedona300MWcoalfiredboiler,wherea3-Dtemperaturedistributionvisualizationmonitoringsystemwasinstalled.Theresultsshowthatthecorrectlyfurnacetemperaturedistributioncanbeobtainedbythesyst

8、em,andthecombustionadjustmenthasgreatinfluenceonthe3-DtemperaturedistributionNOxemission,furnaceradiantenergy,andunburnedcarboninflyash.Furthermore,NOxemissionhashighcorrelationwiththe3-Dtemperaturedistribution,especiallythetempe