纯燃高炉煤气高温高压锅炉过热器超温研究

上海交通大学硕士学位论文纯燃高炉煤气高温高压锅炉过热器超温研究姓名：秦小东申请学位级别：硕士专业：动力工程指导教师：王恩禄;王乃义20081001I220T/H,IIStudyofsuperheateroverheatingofpurefiringBlasterFurnaceGashightemperaturehighpressureboilerABSTRACTSuperheaterisoneimportantpartofboilersetting.Asaresultofitsbadcondition,accidentsofoverheatingandburstingoftubesoftenoccur.Itisanemphasistostudysuperheateratalltimes.Notonlythespecialitiesofstructureandcharactersofmaterial,butalsothefeaturesofoperationandcharactersofabsorbingheatarerelatedandanalyzedonthesuperheaterintheelectricpowerstation.Theusualtypesofdamageonthesuperheaterarealsodiscussed.Thethesisanalyzethecharacteristicspropertyofburningoftheblast-furnacegas,buildthemodelofabsorptionofheataccordingwiththetheoryofheattransfer,findoutblast-furnacegasheatvalueandamountofgasrelation,calculatestransmitquantityofheatandmetalwalltemperatureofboiler’smainheatingsurface,anddeterminethecauseforentireoverheatingofsuperheater.Finalsuggestedthatgivefirstplacetoadjustingtheparametercontrollingoperationandreformmainheatingsurface,getfairlygoodeffectinactualoperation.Keywordshightemperaturesuperheater,entireoverheating,heatvalue,amountofgas20081152008115200811511.120%70%294012338220t/hNG220/9.8Q15KW74425mm10262012Cr1MoV58074384.5mm20G48021999,20010.1mm20040.5mm,.38.0mm-38.1mm200538.5mm39.2mm1.2122628T1(C+lg1)=T2(C+lg2)1-1T1T212C102031.31.3160MW12345641.3219571973CE461.CE400t/hCECE300MW600MW2.CECECE51.33:1.2.3.4.1.4NG220/9.8Q161.2.220T/H220T/H3.4.72.12.1.1:1.2.463.4.2-15.51425mm5.5mm6.100200mm7.821Fig.2-1Thestructureofhightemperatureheatertubes2.1.290010005055401.2.()9()T0.3-0.4TMTMK10GrMo91012Gr1MoVG10212Gr2MoWVTiBT91T92TP304HTP347H2412Gr1MoV540560560580G10212Gr2MoWVTiB6006005806006202.1.3:20302-2102-2Fig2-2TempspecialpropertyofHTSH:232-3Fig2-3WalltempspecialpropertyofHTSH:112.1.4731.21.25iipj1*2i/ipj2=(r*jg)/l1ηrqiqpjηjgl2.22.2.11.:12242-4Fig2-4Representativecreepprocesscurve262-5Fig2-5Strain,thetemperatureandtherelationdestroyingtime2.133.15GrMo12Gr1MoVTP304HTP347H.122628141122(lg)(lg)TCTCττ+=+T1T212C10202.2.22.2.2.1(1973),,4041:max211()1btttqδβµλβα=+∆++++,btttmaxq2αtbwtb152.2.2.2q2αjgjgmax211()1btttqδβµλβα=+∆++++q2αDITTUSBOELTER0.80.023RePrnNu=n0.460ld〉2α0.820.2()0.023Bdρωα=0.40.6pcBλµ=2α0.20.816B1.BBCpµλCpµλPT2-6BFig2-6ImpactofthepressuretemperatureoverBvalueB2αB2α2.2α2α1172α2αPTBB2α2α2αBB2183.q11.q2α2.2α2α3.q4.192.32α213.1NG220/9.8Q1BFG220T/H,,1231223-1Fig3-1Asketchmapofboiler’sheatingsurface3.1.11.1379-2.9212.BFGBFG3BFGBFG456233.201904.65%1.553-2220T/HFig3-2220T/HBoiler’ssuperheatertypicalsystem241234567891011123-16()M2C425mm(12)12Cr2MoWVTiB369600425mm(74)12Cr1MoV659.8580384.5mm(74)20G593470515.5mm75+32420G130.74701233%G10212Gr2MoWVTiB5806006203.2α253.1.23.1.2.1BFG3-23-2BFG6%%CO23.22125CO222.41925H23.114N251.350573268kJ/Nm330003600kJ/Nm3=50mg/Nm310g/Nm33.1.2.23-3NG-220/9.8-Q1220T/H5409.81MPa11.28MPa22032020263.23214DL612-1966GB922288,20010.1mm20040.5mm,.,550,,,,(3050)3058012Cr1MoV58056658038.0mm-38.1mm200538.5mm39.2mm3223-427kJ/Nm33268290011.31601759.35T/H13.91936.62900kJ/Nm33268kJ/Nm311.3%BFG,1759.35%3-5AB81180745745704483480337636882272234177173441641603543551475474143543504914921283.3220T/H([1]15)*3.3.1660045%31.6-39.3%15.9-23.6%34.4-463-6m2MW756.91995102795.2877.4134798157.8*9361418992.665.13.3.2NG-220/9.8-Q15%73-7m2m/sMW299728708.78.721.0113.9266451513.114.418.2714.79*659.8661.813.915.515.815.1350MW50%50%28-34%3.3.388%55.6-60%25%50MW2.3-2.61.55-2.0283-8m2m/skwm2/MW18908.060.05112.8381912.40.08646.2*2934.613.30.06842.683.3.4220T/H93-930m2m2m2756.918421890877.411793819*9361321.62934.633411.,,,(),,,2.33421QQ=ϕVgQL-IϕVgQLI2QSQS=KSFt3131.2.VgQL-I+KSFt=CVgKS23%1.2.3.3.4,324.14.1.1COH2BFG1113BFG12CO+O2=2CO222H2+O2=2H2O4.1.21Nm3kJ/Nm3BFGBFGCOH2,COH2213Hl=HH2rH2+HCOrcoHlHH2HCOBFGH2COrH2rcoBFGH2CO4-1COH233COH2kJ/Nm3126441079432684.1.3BFGBFGBFG4-25BFG4-2BFGCO%CO2%H2%N2%kJ/Nm3123.222.43.151.33268.02222322.92.751.43199.558322.523.42.451.73103.956421.923.92.2523006.504521.324.21.952.62898.2584.1.41111337BFGV0=1/21[0.5H2+0.5CO+(m+n/4)CMHn+1.5H2S-O2]V0Nm3/Nm3H2COBFGV0=0.626Nm3/Nm3234VV=V0111.051.1V=1.051.1V04.1.51=1CO2SO2N2H2O1Nm3111337VRO2=VCO2+VSO2=0.01CO2+CO+mCMHn+H2SVRO2VCO2VSO2CO2SO2VRO2=0.456Nm3/Nm3VH2O0=0.01[H2+H2S+∑n/2CMHn+120(dg+V0da)]VH2O0daVH2O0=0.031Nm3/Nm3VN20=0.79V0+0.01N2VN20VN20=1.00835Vf0=VRO2+VH2O0+VN20Vf0=1.495Nm3/Nm321CO2SO2N2H2OH2CO+-1V0=1.495+0.050.1*0.6264-34-3(=1.1)kJ/Nm3V0Nm3/Nm3VRO2Nm3/Nm3VH2O0Nm3/Nm3VN20Nm3/Nm3Vf0Nm3/Nm3VfNm3/Nm332680.6260.4560.0391.0081.5021.56531990.6120.4590.0340.9971.4911.55231030.5930.4590.0310.9851.4751.53530060.5740.4580.0290.9731.461.5184-44-4(=1.1)kJ/Nm3CO2%N2%O2%H2O%326829.167.60.82.5319929.667.40.92.1310329.967.20.92300630.267.10.81.9289830.467.10.81.7Cp1KJ/m3·4-5Cp36kJ/Nm3Cp300Cp400Cp500Cp600Cp700Cp80032681.4816571.5069981.5327741.5583281.5812631.60231831991.4834821.5092241.5351791.5608991.5839551.60510831031.4849171.5108581.5369371.5627711.5859141.60714430061.4863051.5124341.5386321.5645761.5878021.60910928981.4869111.5132061.5394681.5654721.588741.610081kJ/Nm3Cp900Cp1000Cp1100