O2CO2气氛下混煤氮氧化物释放特性研究

华中科技大学硕士学位论文O2/CO2气氛下混煤氮氧化物释放特性研究姓名：刘毅申请学位级别：硕士专业：热能工程指导教师：陈刚2011-01-09INOxNOxO2/CO2CO2NOxSOxNOxNOxHCNNH3NOx,HCNNH3O2/CO2TGDTGNOO2/CO2NONOO2/CO2NOxNOxIIAbstractEnergyproductionandconsumptionishugeinourChina,nationalconditionsdecidethecoal-dominatedenergystructure.ButtheNOxemissionsfromcoal-firedpowerplantscausegreatharmtoatmosphericenvironment,socontrollingCoal-firedpowerplantNOxpollutionandothergasemissionshasbecomeanimportanteconomicdevelopmentgoaloftheprocess.O2/CO2cyclecombustiontechnologyisanefficient,economicandenvironmentallyfriendlynext-generationcombustiontechnology,itcansignificantlyreducethecombustionprocessinCO2,NOx,SOxandothergasemissions,reducetheharmtotheenvironment.ThispaperstudiestheefficacyofthistechnologyincontrollingthereleaseNOxfromcoalcombustion.Firstofall,inthetubefurnacedevices,byusinganinfraredgaseousanalyser,releasecharacteristicsofNOxprecursorsHCN,NH3andNOxfromtwosinglecoalsIndonesiaCoalandShanxi-youhunCoalunderdifferentcombustionatmospherewereinvestigated,andgottheirtotalreleaseratecurveandtheirtotalreleaseamount.Bycomparingthecharacteristicsofthesecurves,thereleasingcharacteristicsofHCN,NH3andothergasesformcoalatdifferentatmosphereduringpyrolysiswereinvestigated,andthenanalysedtheefficacythefactorssuchascoalcharacteristics,theatmosphere,andtheoxygenconcentrationinO2/CO2atmospheredotothereleasefromthem.Secondly,thecoalelementcompositionwasmeasuredandmadetheTGAexperimentofthetwosinglecoalsanditsblendedcoals,analysisofcoalpropertiesandashcontentofcoal.TheTG,DTGcurveofthemixedcoalcombustioncharacteristicswereobtained,andthecombustioncharacteristicsofblendedcoalswereinvestigated,theignitioncharacteristics,burnoutcharacteristicsofIndonesiaCoalandShanxi-youhunCoalandchemicalkineticparametersincombustionwereanalysed,sothattheefficiencyaftermixingthecoaltotheburningcombustioncharacteristicswasobtained.Finally,onthisbasis,inthetubefurnaceequipment,theNOreleaseingfromblendedIIIcoalsunderdifferentatmospherewasinvestigated,especiallytheeffectofcarbondioxide,oxygenconcentrationinO2/CO2atmosphereonNOreleaseing.Throughtestanalysis,theeffectofthemixedcoalcombustiontotheemissionsofpollutantssuchasNOwasobtained.Keywords:O2/CO2combustiontechnologyNOxprecursorsNOxBlendedcoalsCombustioncharacteristics111.110.4%[1]95%[2]1-170%28.6%1-1[3]19806027572.220.73.14.019857668275.817.12.24.919909870376.216.62.15.1199513117674.617.51.86.1200013855367.823.22.46.7200522468269.121.02.87.1200624627069.420.43.07.2200726558369.519.73.57.3200828500068.718.73.88.92[4]~[6]CO2CO2CO2CO225%CO2CO2[7]~[8]1(IGCC)(PFBC)23CO2(CCS)CO2CO2(NOx)[9]600~1200mg/Nm3()850~2150mg/Nm3()100kWh3.9~8.8NOx70070%56NOxNONO2N2ON2O3NOxNOx[10]NO(Hb)CONOxSO2NO100ppm31~2ppmNOxHNO3NOxNOxCH(N2O)1.2O2/CO279%NOxO2/CO2[11]~[12]O2/CO2CCSCO2O2CO2CO2O2/CO2CO290%CO2CCSO2/CO21-1[13]O2/CO241/5[14]O2/CO24~6NOx1/3O2/CO2SO2NOxCCS1-1O2/CO2O2/CO2[15]1N2CO290%CO22O2/CO2N2NOx34556O2/CO271.31.3.1O2/CO2O2/CO2Wolsky[16]1986Argonne(ANL)[12]1991CO2O2/CO2CO2CO2O2Argonne2.94MW[17]WangCSBerry[18]O2/CO22134mm600mm1DO2/CO2CO2O22.23-3.621992MakayamaS.[19]O2/CO2O2O297.3%PayneR,ChenSL,WolskyAM[20]O2/CO26CO2O22.7NOx70%CO2+H2OO23.2NOx80%1997NKimura[21]O2/CO2O2/CO2O2ToshiyukiSudaA,KatsumiMasukoetal[22]O2/CO2O2/CO2CCSSinghDCroisetE[23]O2/CO2CO2CO2O2/CO22005YewenTan[24]O2/CO235%KlasAnderssonFilipJohnsson[25]CH4O2/CO2O227%20%-30%O2/CO219940.3MWO2/CO2O2/CO2100MWO2/CO270%90%71.3.2O2/CO2NOxO2/CO2NOxNOx70%O2/CO2WaterlooCroisetE.ThambimuthuK.V.[15][26]CANMETCETC0.21MWO2/CO2NOxNON2O2NOxNOxNOx40%-50%CO2N2O2/CO2OkazakiKAndoT[27]O2/CO2CH4O2/CO2NOx1/3O2/CO2NOxN2NOxNOxNOxNNOxOkazakiKO2/CO2CO2CONOxNOxNOxNN2NOxHuYQ[28]-[30]O2/CO2CO2NOxNOxO2/CO21123-1573KO2/CO2NOx0.8NOxO2NOxO2/CO20.5NOx10%1.460%2003Liu[31]O2/CO28O2/CO240%15%NO6/7KimuraN,OmataK[11]O2/CO2CO2CONOO2/CO2NNOxN2O2/CO2NOxCO2NOO2/CO2NOx1999(973)O2/CO2TGA-FTIRO2/CO2[32][33]-[36]EFRO2/CO2NOxO2O2/CO2[37]FluentO2/CO2[38][39]O2/CO2O2/ArNOxNOx/NOx1.4O2/CO29SO2NOX1.4.1NOXO2/CO2O2/CO2O2/N2O2/ArNOxO2/CO2O2/CO2NOxCO2NOxSOxNOXNOxHCNNH3O2/CO2N2ONONO2CONOxNON2ONO2COO2/CO2NOTGDTG10O2/CO2NO1.4.2NOXNOxO2/CO2NOx1122.12.2AB90µm4:13:21:12:3l2-1(a)GB/T211-1996GB/T212-2002LasNavasTGA2000l2-1(b)SO/TS129022001(E)GB/T476-2001GB/214-1996ElementarVarioELl2-1(c)GB/T213-2003Parr630012l2-1(d)GB/T14506-93Axios-AdvancedX(a)(b)(c)(d)X2-12-12-22-1/(%)CadHadOadSadNadVadFCadAadMadA64.694.477.330.870.9525.4552.8616.615.08B60.746.1715.660.100.9041.9941.584.7311.70A:B=4:163.985.119.000.720.8628.9450.7314.106.23A:B=3:262.405.6711.700.560.8732.3848.8211.177.63A:B=1:163.115.7011.540.480.8733.9347.7710.038.27A:B=2:362.316.0312.840.410.9235.5446.978.638.86132-2/(%)A:BAB4:13:21:12:3SiO252.1561.6851.5451.3050.7450.05Al2O332.3213.0431.6430.4129.8028.96Fe2O35.388.716.066.457.347.84MgO0.602.450.740.941.071.26CaO3.395.403.583.954.124.49Na2O0.350.120.340.340.330.30K2O0.840.760.800.800.810.79TiO21.241.221.241.241.221.21MnO0.040.070.040.040.050.05P2O50.400.140.390.360.350.342.32.3.1CO2O2N2ArGASMETFTIRDx40003L/min650mm18mm100mm142-2lO2CO2lµml20K/min1373K30minl3L/minlll2-3AN2/O2=80:20Ar/O2=80:2