搜索
:2005-12-28;:2006-02-27:(1976-),,,.:1001-2060(2006)04-0391-03,,(,071003):3,,154m90154m4590m45m4,DR,,,,,,,:;;;:TK22916:A1,,,,,,,1m(,)2ABC3Fe2O3Fe3O4,[1],,,Fe3O4Fe2O323,Fe3O4,,,,,Fe3O4Fe2O3,,90012001h,1%154m90154m4590m45m4,,44,3DR[2],,,,10gPcm2,(ASME)28DR4;3,12[3]1,(1kV)1kV10-1010-3A0300,1kV21420067JOURNALOFENGINEERINGFORTHERMALENERGYANDPOWERVol.21,No.4July,200612,,,4,,,,,,,,,2411(1010cm)Pm15490154459045ABCABCABCABC200.270.160.30.250.140.280.270.220.230.210.200.12500.070.050.120.070.040.310.050.030.110.040.030.081008.80.388.63.50.4936.02.82.17.66.05.918.01205.11.449.015.03.010027.05.297.029.016.096.01307.02.667.021.04.216038.07.221049.023.03301405.21.752514.03.614036.05.818044.018.03101601.60.6328.04.71.56916.02.813034.09.22801800.460.299.61.60.5835.08.41.585.026.04.82102000.120.125.80.450.2616.03.30.6162.021.02.7180135,200:4050;130160,,,,,,,,,,130160,,,,,1,,,,P,,,,,,100,,,,29320063A-4B-5C-,,,,,,,P,,,,,,,,,,,,154m45m,,,,P,,,[4],Al2O3CaOMgO,5,:,,,,,154m45m,,,,,100,,,,,,,,,,,,::[1],,.Fe3O4Fe2O3[J].,1996,16(4):297-301.[2],,,.DR[J].,1998,18(4):368-370.[3],,,.[J].,2005,25(17):105-109.[4],,.[J].,2003,26(2):87-90.3934,:rousmediaundertheconditionofreciprocalflows.Thesolutionunderdiscussioncomprisestwoconstantdifferentialequations,inwhichallcontrolparametershavebeenincluded,thuscontributingtoanin2depthunderstandingoftheef2fectofthesecontrolparametersonthecharacteristicsofburners.Comparedwiththeresultsofanumericalsimulation,thetemperaturecurvesofporous2mediumsolidscanbepredictedexceedinglywellbyuseofsectionedlinearfunctionsofthesimplifiedsolution.Themaximaltemperaturesinsidetheburnersobtainedbymakinguseofthesimplifiedtheoreticalso2lutionexhibitanidenticaltendencyasthatoftheexperimentalvalues.However,theabovemaximaltemperaturesareusu2allygreaterthantheexperimentaloneswiththeerrorbetweenthembeingassessedatabout20%.Keywords:theoreti2calsolution,super2adiabaticcombustion,porousmedium,reciprocating=AnExperimentalStudyontheCombustionCharacteristicsofaKindofNat2uralCoke[,]PDONGYong,WANGChun2bing,WANGWen2long,etal(EnergySourceandEnvironmentRe2searchInstituteAffiliatedtoEnergySourceandPowerEngineeringCollegeundertheShandongUniversity,Jinan,China,PostCode:250061)PPJournalofEngineeringforThermalEnergy&Power.-2006,21(4).-387390Naturalcokeisakindofsolidresidueproducedaftercoalhasbeenheatedanddecomposedfollowingitscontactwithmagmaticrocks.Ithasbeenformedbydestructivedistillationaftercoallayersaresubjectedtoheatingandbakedwhenmagmaticrockshaveintrudedintocoallayersorthereabouts.Naturalcokeisusuallyregardedasakindofenergysourcedifficulttobeutilized.Withaviewtoexploringnewwaysofcomprehensiveutilizationofnaturalcoke,anexperimentalstudyhasbeenperformedofsuchcombustioncharacteristicsasignitionandburn2upetc.ofthenaturalcokeandJining2originatedcoalaswellasamixtureofthetwowiththehelpofathermogravimetryanalyticmethod.Thethermogravimetrictestresultsshowthattheignitiontemperatureofnaturalcokeis876.3K,regardedasthehighestignitiontemperaturefol2lowedbyasecondhighestspecifictoblendedcoals.Jining2originatedcoalischaracterizedbythelowestignitiontempera2ture.Thenaturalcoke,however,hastheshortestburn2uptime,Jining2originatedcoalanintermediateoneandtheblendedcoalsrequirethelongestburn2uptime.Summinguptheexperimentalstudyandtheoreticalanalysis,theauthorsconcludethatnaturalcoke2blendedcoalfuelcanbeusedinpower2plantboilers.Thepresentresearchfindingscanpro2videabasisforemployingnaturalcokeaspowerplantfuels.Keywords:naturalcoke,thermogravimetry,combustioncharacteristics,ignition,burn2up=AnExperimentalStudyoftheMechanismGoverningtheIm2pactoftheSizeofCoal2firedFlyAshParticleonSpecificResistance[,]PQILi2qiang,YANWei2ping,YUANYong2tao(EnvironmentScienceandEngineeringCollegeundertheNorthChinaUniversityofElectricPower,Baoding,China,PostCode:071003)PPJournalofEngineeringforThermalEnergy&Power.-2006,21(4).-391394Aftertheashsampleshavebeencollectedfromthreedomesticpowerplantsandfullyincineratedinahightemperaturefurnace,theyweresiftedbyemployingamechanicalsiftingmethodintofourcategoriesofparticlediameters,i.e.145m,90154m,4590mand45m.Onaself2developedDRtypehigh2pressuredustspecific2resistancetestrig,thespecificresistanceofflyashofvariousparticlediametersweredetermined.Thetestresultsshowthatsuperficialandvolumetricelectricconductionwilljointlyaffectthespecificresistanceofflyashand,furthermore,fineparticleshaveahigherporosity.Asaresult,theflyashwithrelativelysmallparticlediametershasahigherpeakvalueofspecificre2sistanceMoreover,beforethelatterreachesitspeakvalue,themorecoarsetheashsamples,thehighertheirspecificre2sistance.Afterthespecificresistancehasreacheditspeakvalue,however,thegoverningrulewillevolveinanexactlyoppositeway.Keywords:flyash,ashincineration,particlediameter,specificresistanceHCNNH3=AnAnalysisofHCNandNH3ReleaseCharacteristicsofCoal2waterSlurryinitsPyrolysisProcess[,]PMENGDe2run,ZHAOXiang,ZHOUJun2hu,etal(EducationMinistryKeyLaboratoryontheCleanUtilizationofEnergyResourcesandEnvironmentalEngineeringundertheZhejiangUniversity,Hangzhou,Zhejiang,C