锅炉炉膛出口烟气温度的在线测量与温度场重构

3011201011动力工程学报JournalofChineseSocietyofPowerEngineeringVol.30No.11Nov.2010:20100624:20100713:(1984),,,,:.(Tel.):13401121165;Email:[e-mail].:16747607(2010)11081505:TK311:A:510.40王毅,芮晓明,马志勇(,102206):设计了一种基于红外测温技术的炉膛出口烟气温度在线检测系统,研究了适用于电站锅炉炉膛出口截面温度场的重构方法.通过在炉膛出口处的测量截面合理安装具有扫描功能的红外测温装置,获得实时烟气平均温度;利用所测在线数据,借助傅里叶正则化算法,实现对测量截面烟气温度场的准确重构.结果表明:由测温装置扫描形成的测温路径在20~30条之间傅里叶展开项为九项时,重构温度场效果最佳;重建温度场最大误差为42.2K,重构时间在2s左右,满足在线检测要求.:炉膛;出口烟气;红外测温仪;傅里叶正则化;二维温度场;在线检测OnlineMeasurementforFurnaceExitGasTemperatureofBoilersandTemperatureFieldReconstructionWANGYi,RUIXiaoming,MAZhiyong(SchoolofEnergy,PowerandMechanicalEngineering,NorthChinaElectricPowerUniversity,Beijing102206,China)Abstract:Anonlinedetectingsystembasedoninfraredtemperaturemeasurementtechnologywasdesignedforfurnaceexitgastemperature,andthemethodwhichwasapplicabletotemperaturefieldreconstructioninthecrosssectionoffurnaceexitofutilityboilerwasstudied.Therealtimeaveragetemperatureoffluegascanbeachievedbyreasonableinstallationoftheinfraredtemperaturemeasurementdevicewithscanningfunctioninthecrosssectionoffurnaceexit.ByuseofthemeasuredonlinedataandwiththehelpofFourierregularizationalgorithm,accuratecrosssectionfluegastempraturefieldreconstructioncanbeachieved.Resultsshowthatwhenthenumberofthetemperturescanningpathformedbythetemperaturemeasuringdeviceisbetween20to30andtheFourierexpansiontermsisequaltonine,theeffectoftemperturefieldreconstructionisthebest.Themaximumerrorofthereconstructedtemperaturefieldis42.2K.Itwillcostabouttwosecondsfortemperarurefieldreconstruction,whichmeetstherequirementsofonlinedetection.Keywords:furnace;outletfluegas;infraredthermometer;Fourierregularization;twodimensionaltemperaturefield;onlinedetection,..,,,[1].,,.,,,.,[2].,.1,.,,,[3].1000,,,[4];,.1.1,.,,:Pb(T)=c1-5/(expc2/T-1)(1):Pb(T);;T;c1c2.,Pb(T)T:Pb(T)=T4(2):;T..():P(T)=Pb(T)=T4(3),:T=[P(T)/()]1/4(4)(4)[5].,,CO2,,[5]..,,(CO2H2O).[6]:=1-exp(-kgrnps)(5)s=3.6V1/F1(6)kg=[(0.78+1.6rH2O)/(10prns-0.1)]!1-0.37T1000!10-5rn(7):kg,1/(m∀MPa);p,0.1MPa;rn;rH2O;rnrH2O;s,,m;V1,m3;F1,m2;T,.,0.93.2.7~3.0!m,2.7~3.0!m[6].1.2.,.,.∀#,;,;T,..,8.29m!13.66m,3(1),S1S2S3S4S5S66.,.(1)1.,1,,.(2)2.2S2S5,∀816∀动力工程学报301Fig.1Layoutoftemperaturemeasurementdevice.,S1S6(1),2,11,212,5#.50#,11,22.1.3.,2[7].2Fig.2Principleofinfraredthermometer,(2.7~3.0!m),,,.3...A,0.7MPa;B1C1.,.B2;C2D1.B1B21-;2-;3-;4-;5-;6-;7-;8-;9-;10-;11-;12-;13-;14-;15-;16-;17-;18-;19-.3Fig.3SchematicofinfraredtemperaturemeasurementdeviceC1C2D1D2.A,.B2C2,,D2,...,,.2.Tk,k.f(x,y),M,:Tk=1Lk∃kf(x,y)dlk,k=1,2,3,%,M(8)f(x,y)xy2Lx2Ly,f(x,y),[8]:f(x,y)=&Ndi=1&Npj=1ai,jcos(i∃x/Lx)cos(j∃y/Ly)i=1,2,3,%,Nd;j=1,2,3,%,Np(9):NdNpf(x,y)xy,(8):∀817∀11王毅,等:锅炉炉膛出口烟气温度的在线测量与温度场重构Tk=1/Lk∃lk&Ndi=1&Npj=1ai,jcos(i∃x/Lx)cos(j∃y/Ly)dlki=1,2,3,%,Nd;j=1,2,3,%,Np(10)bk,ij=1/Lk∃lkcos(i∃x/Lx)cos(j∃y/Ly)dlk(11)(10):Tk=&Ndi=1&Npj=1ai,jbk,ij=&Nm=1ambm(12)i=1,2,3,%,Nd;j=1,2,3,%,Np;m=1,2,3,%,N:N=Nd+Np;bmbk,ijm.a1b11+a2b12+%+aNb1N=T1a1b21+a2b22+%+aNb2N=T2%%%%%%a1bM1+a2bM2+%+aNbMN=TM(13),:B∀a=T(14):BM!N;T=[T1,T2,T3,%,TM]T,M!1;M;N,Nd+Np∋N.B∀a=T,[9].Tikhonov.[10]:a=(BTB+I)-1BT∀T(15)a(9)f(x,y),.3:Tk;,.[11]:T(x,y)=a+b∀sin(k1∃x)∀sin(k2∃y)(16):ab,a=800,b=400;k1k2,8.29m!13.66m,k1=1/8.29,k2=1/13.66.30!30,Matlab4.(a)(b)4Fig.4Threedimensionaldisplaymapandisothermmapofthetheoreticgastemperaturefieldatfurnaceexit,0.059,f(x,y)30!30,Matlab(5).(a)(b)5Fig.5Threedimensionaldisplaymapandisothermmapofthereconstructedgastemperaturefieldatfurnaceexitdre[12],1.1Tab.1Erroranalysisofthereconstructedtemperaturefield%d3.150r4.135e4.8001,.,Tk,2.∀818∀动力工程学报302Tab.2Agroupofonlinedataobtainedbymeasurementdeviceundercertaincondition121(12)864.3825.52(13)882.5838.03(14)893.9853.64(15)943.3879.85(16)974.4916.86(17)1021.8996.47(18)1035.81009.28(19)1036.91027.29(20)1020.31026.710(21)995.31006.011(22)1018.21001.72,T(T1,T2,%,T22);(11)B,i+j=9,9.(14)a;a(9)f(x,y).f(x,y)30!30,Matlab(6).4,2m4m6m,,3.(a)(b)6Fig.6Threedimensionaldisplaymapandisothermmapofgastemperaturefieldatfurnaceexitbasedonmeasureddata3Tab.3Erroranalysisofthereconstructedtemperaturefield2m/2m/K4m/4m/K6m/6m/KS2973.21)/1003.72)30.5993.5/1008.515.01044.2/1057.613.4S3901.2/943.242.2965.6/982.116.5989.0/1001.112.1S4920.5/945.825.3986.5/1003.717.21044.7/1056.111.4S5950.1/986.336.21077.2/1086.719.51176.4/1190.113.7:1)/;2)/.:42.2K,2m;.4.,20~309.,2s,,,.:[1]CHANDOKJS.Estimationoffurnaceexitgastemperature(FEGT)usingoptimizedradialbasisandbackpropagationneuralnetworks[J].EnergyConversionandManagement,2008,49(8):19891998.[2],,,.[J].,2007,23(2):2325.ANLiansuo,SHENGuoqing,WUZhiquan.Experimentstudyonacousticpyrometryinpowerplantboiler[J].PowerSystemEngineering,2007,23(2):2325.[3],,.[J].,2009,31(6):315318.HANGQingbiao,CHENLe,LIURuixiang.Newresearchonthemethodofthermalmeasurementwithtemperaturereference[J].InfraredTechnology,2009,31(6):315318.[4],,,.[J].,2010,30(3):206209.(下转第843页)∀819∀11王毅,等:锅炉炉膛出口烟气温度的在线测量与温度场重构:[1],,.[J].,2008,30(2):159162.YAOXingjia,WENHexu,DENGYing.Adjustablepitchintelligentcontrolofvariablespeedconstantfrequencywindgenerationsystem[J].JournalofShenyangUnivers