煤的加压热解试验研究

970018X(),(N2),(101kPa1317kPa),,,,,:,,,TheExperimentalResearchofPressurizedCoalPyrolysisXiongYuanquanLiuQianxinZhangMingyaoXuYuenian(SoutheastUniversity)AbstractAtpresent,thethermalanalysisapparatusisusedinstudyingthepropertiesandkineticsofthesolidpyrolysisextensively.Thispaper,bymeansofpressurizedthermogravimetricanalyzerdesignedandproducedbyourselves,studiestheeffectsofpressures(101kPa1317kPa)onthecoalpyrolysisprocessunderinertialatomosphere(N2),surveystheprocessofcoalparticlede2volatilizationindifferentpressuresandtheeffectsofcoalparticlesizesontheprocessofcoalpy2rolysisdevolatilization.Inthemeantime,basingontheexperimentalfiguresandintegratingwithpredecessorsexperiences,thispaperproposeskineticsequationofpressurizedcoalpyrolysis,andpresentsamathematicalmodelofpressurizedcoalpyrolysisbasedonthekineticsequation.Bythismodel,analyzingandcalculatingresultsaccordwithexperimentalresultsverywell.Keywords:Pyrolysis,Coalparticle,Volatimatter,Volatileyield3(1997)2JOURNALOFCOMBUSTIONSCIENCEANDTECHNOLOGYVol.3(1997)No.2X210096T,K;at;Tmax,K;E,kJömol;k0,1ös;F,m2;h;Dõ;ch,kJökg;VS;Tp,K;Vp,m3;Qc,kgöm3;cpc,kJökg;E;Tw,K;qv,kJökg;Gv;cr,kJökg;V,%,,,,PFBC,,,Anthony[4,5]0.0001MPa10MPa,StephenNiksa[6]13.3Pa10MPa[8]90,80,,,,,11.1:1:(1)(12501),1600,550mmö40mm200mm63132(2)8mVöLm,0.5%,0.05%öK,400mg,0.2mg(3),12AöD,30ös(4)1,,,,,,231,,2()3()1$möm123ö%ö%ö%ö%ö%ö%28.817.3231.9628.132.366.767.6530.46.0128.351.517.786.2931.272.1673119975:1.24()[7],2,20ömin,900,10min101kPa507kPa912kPa1317kPa,0.4mm0.56mm1.25mm1.6mm2.0mm3.0mm2:%VfCfWfAf29.8447.08122.088.1672.840.4918.5122.1451.25mm1.6mm33(1.25mm1.6mm)Vö%101kPa507kPa912kPa1317kPa28.9427.7726.5425.168.277.456.856.334(d=1.25mm1.6mm)5(d=1.25mm1.6mm)45,,,560,680,,,,83132,,3,,,,,,,,,,,,,,,,,,,2.2,3,67,(),,,,,,,,,6()7()2.3,[13],,,f(a)f(a)=1223a-1.9[1-(1-a)1ö3](1-a)-2ö3-1.9a-2.9[1-(1-a)1ö3]2-1TTmax{[(1-a)-2ö3-1]+23a(1-a)-5ö3}-1TTmax(1)Tmax(daödt)max93119975:,,(TTmax),,;(TTmax),,,,,,,,3Ek0;,;:(1)daödt=k0exp(-EöRT)f(a)(2)dVödt=Vdaödt(3)V55t(VpQccpcTp)=Fh(T-Tp)+FED(T4w-T4p)-qvGv(4)dQcödt=-Qc0dVödt(5)(1)(5)V(t),,Nu2.0h;Tm=0.7Tp+0.3T,Tp,Tcpc:cr=0.20+910-6(13+Vr)(130+tp)ch=0.17+1.210-4tpcg=0.01[chAg+cr(100-Ag)]cpc=0.01[cg(100-Wy)+Wy](6)[7]4,,89478,041328(d=1.25mm1.6mm)9(d=1.25mm1.6mm)14119975:4(d=1.251.6mm)kPa1015079121317E1kJökmol701128773996091103389k011ös0.19551080.59581090.314210100.11421011E2kJökmol86926102836110175120634k021ös0.43241090.962410100.604510110.41371012kPa1015079121317E1kJökmol112231127182139483151587k011ös0.24141090.243710100.163510110.10141012E2kJökmol134237151834165240179303k021ös0.965410100.974810110.928510120.901410135(1),,,,,,(2),,(3),Ek0111:,19872,11:,19853SestakJ.Thermochim.Acta,1971,(7):4704AnthonyDB,HowardJB,HoffelHC,etal.RapidRevolatilizationofPulverizedCoal15thSymp(int)onCombustionöCombustionInstitute,Puttsburgh,1975.13035AnthonyDB.RapidDevdatilizationHydrogasificationofPulverizedCoalScDThesis,DeptofChemicalEngi2neeringMassachusetts,19766StephenNiksa,etal.Time2ResolvedWeightLossKineticsfortheRapidDevolatilizationofBituminousCoal.19thSymp(int)onCombustionötheCombustionInstitute,1982.1151115771:[].:,199518,11,199124132