电站锅炉炉膛爆炸事故原因及预防

40120091BOILERTECHNOLOGYVol.40,No.1Jan.,2009:2008209216:(19632),,,,,:CN3121508(2009)01200582051,2(1.,450004;2.,450004):;;;:,,:TK223.21:B1,,,,,,-50-120Pa,3.92kPa,,,,,,,,,500MW,,MFT,(),2:;;2.1(1/100s),,,3:;,;()3,,p2:p2=p11+VrVQrCVT1:p2,Pa;p1,Pa;T1,;1,:Vr,m3;V,m3;Qr,kJ/m3;CV,kJ/m3K,:(1)V,Vr,Vr/V,p2,,;(2)Qr,p2,,,(),;(3)T1,p2,,,,;T1,p2,,,,650,750,,,(),,,,,,,3;,;,,,,,,,,,;,,,,;,,,,,,,,,,2.2,,2.2.1,,,,,:(1),,,;(2),,,;(3),,,,;(4),;(5),,,,;(6);(7),,,,,,,,,2.2.2,9540()(),:(1),,,,,;(2),,,,;(3),;(4);(5),(200),;(6),,;(7),;(8),,;(9),,,,,2.3,:FeO+C15002000Fe+CO,,:3Fe+4H2OFe3O4+4H2,,,,,,3,;;:;;:(1),;(2),;(3),,;(4),33.1,(1),;(2);(3),,90%,:(1),,,30%,5min;(2),,,;(3),,,;(4),,,;(5),30%,,;(6),,,,,061,:,,FSSS,3.23.2.1,,,:(1),,;(2),,;(3),;(4)NOx,,;(5);(6),;(7),,;(8),,,3.2.2,,,(1),;(2),;(3),;(4),;(5),;(6);(7),;(8),,,,,3.3,,,,:(1),,,;(2),;(3),;(4),;(5),;(6),4,,,,,,,,:[1].[M].:,2006.[2][R].,2003.1640[3].[M].:,2005.[4].()[M].:,2007.[5],,.[J]..2005,(4).[6].[J].,2005,(11).[7].[J].,2008,(3).[8],.[J].SAFETY,2005,(5).[9].[M].:,2007.ExplosionAccidentsReasonsandTheirPreventionofBoilerFurnaceforPowerPlantLIWen2guang1,GUOChao2ling2(1.HenanInstituteofBoilerandPressureVesselSafetyInspectionandTesting,Zhengzhou450004,China;2.ZhengzhouElectricPowerCollege,Zhengzhou450004,China)Keywords:boilerfurnaceofpowerplant;explosion;accidentsreason;preventingmeasuresAbstract:Explosionaccidentsofboilerfurnaceoccurfrequentlyinthermalpowerplant.Thispaperanalyzesthereasonsthatresultinexplosioninthefurnacebecauseofcoalpowdersdeflagrationandthedestructionofthefurnacebecauseofwater2walltubesbursting,andthedecrepitatingofseparatedironshydrogen.Preventingmeasuresarerespectivelyproposedtoavoidingboilerfurnaceexplosionaccordingtothesereasons.(57)TheEffectofWeldingThermalSimulationandHeatTreatmentonPropertiesofHAZofSA302CSteelCUIJin2peng1,YANGZhi2wen2,JIAn2fang2,WULu2hai1,HEGuo1(1.WeldingEngineeringInstituteofShanghaiJiaotongUniversity,Shanghai200240,China;2.ShanghaiBoilerWorks,Ltd.,Shanghai200245,China)Keywords:SA302C;coarsegrainheat2affectedzone;weldingheatinput;thermalsim2ulation;stressrelieveannealingAbstract:TheHAZmicrostructureandpropertiesofSA302Csteelwerestudiedwiththerangeof16200J/cmand34650J/cmbyweldingthermalsimulation.TheeffectofdifferentheattreatmentprocessesonthepropertiesofCGHAZwereespeciallycompared.There2sultsshowthatthehardnessofCGHAZismuchhigherthanbasematerialsintherangeofheatinputsabove.ThemaincompositephaseofCGHAZwasmartensite.ThegrainsizeofCGHAZwasincreasedbytheimprovementofheatinput.Thehardnessofthesamplesde2creasesafterheattreatmentandthetoughnessincreasessignificantly.However,theholdingtimeofheattreatmenthassmallimpactonthehardnessandtoughnessofthesamples.26