W火焰双拱燃烧锅炉燃用无烟煤燃尽率低的原因分析

:,,,1961,W,(,430070)[]20300MWW,,,,[];W;;;;;[]TK229.63+[]A[]10023364(2003)04002103,,,,,W20300MWW,Vdaf10%1300MW2001,20300MWW(),11,:(1)W,,,(Vdaf=8%12%),[1](2)W,,Vdaf=10%15%[2]1.1362MW362MW12W,1[3]11212Qnetar/MJkg-124.4826.72Vdaf/%14.127.9/%3.6018.76q4/%0.876.25,Vdaf=7.9%,18.76%,1.2300MW300MWW2003(4)21©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(2)[4],Vdaf,,IT,CbW2,,2Vdaf/%Qnetar/MJkg-1RI/CbIT/10.6724.1531910.4382013.4824.7639513.268101421.313259.8880011.9918.1442516.098251.3300MW2300MWFWW,Vdaf10%,Aar=25%30%[5],,30%40%,30%,()1%3.1%,20%13%,9%10%,30%15%,1.4350MWFW350MWW,33Vdaf/%7.027.2511.0111.4111.077.977.48.28Aar/%17.9918.3415.9618.2917.2616.0217.9215.91Qnet,ar/MJkg-125.5324.1826.7825.5726.0626.3925.9226.18HGI5538697170484848Cfh/%40.5515.2824.09(Vdaf=9.78%)Clz/%27.68.14HGI38,HGI55,,;,2.88%Vdaf9.78%,2%,,,24.09%,1.5300MWW,,,2(1)WVdaf10%,,,,;;(2),20%,25%,8%10%(3)300M(3.5m),[7],W222003(4)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3,,,(Vdaf7.0%)125MW,R9010%15%4%6%,20%5%6%,125MW(Vdaf=11%)3%6%[8],(Vdaf=7.75%),9.68%[9]W,125MW300MW,,,,,4(1)W,,:1);2);3)(2),,,2(3)W,,(),W,[][1],.[J].,2001,(6).[2],.[C].W,2001.[3],.W[C].W,2001.[4].W[C].W,2001.[5],.W[C].W,2001.[6],.W[C].W,2001.[7],.W[C].,1999.[8],,.[C].W,2001.[9].[C].W,2001.,,:1.200(,),2.,,;3.()4.38,,2003(4)23©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.THERMALPOWERGENERATIONVol.32No.4Mar.2003Contents&AbstractsAPPLICATIONOFRELIABILITY-CENTEREDMAINTENANCETECHNOLOGYONSTEAMTURBINEANDITSAUXILIARYE2QUIPMENTSYSTEMCAOZhong-zhongetal(2)Thereliability-centeredmaintenance(RCM)technologyhasbeenpresented,andthesaidtechnologyusedonsteamturbineanditsauxiliaryequipmentsystembeinganalysed.Theresultsshow,statusmonitoringandmaintenanceaccordingtorealconditionsaresuitableforalotofequipmentfailures.Comparingwiththemodeoffullyregularpreventivemaintenanceusedatpresent,comparativelylargeeconomicbenefitscanbeexpectedtoobtainfromimplementationofRCM.APRIMARYSTUDYONTHEBEHAVIOROFPAHCONTENTINRAWCOALSOFCHINAYAOYanetal(5)InordertoknowwellfivecoalsortswhichhaverepresentativenessinChina,twentysamplesofthemwerepretreatedthroughstepsofSohxletextraction,rotateconcentration,andcolumnpurificationetc.,andgaschromatographanalysisandmeasurementwerecarriedoutforseventeenkindsofpolycyclicaromatichydrocarbon(PAH).Resultsshowthatthemax.totalcontentofPAHappearedintheregion80%85%ofdryandash2freecarboncontent.Alongwithupgradingthedegreeofcoalification,thePAHcontenthastendencytobeincreased,andacertainrelationshipexistsbetweencoalparameters,suchascarboncontent,volatilecontent,O/Cmolarratio,H/Cmolarratioetc.intherawcoal,andthetotalcontentofseventeenPAHs.OPTIMIZINGDESIGNOFLONG-DISTANCEPOWERSTEAMPIPELINEBYCONSIDERINGVARIATIONOFSTEAMDENSITYLIUJin-pingetal(9)Onthebasisofconsideringsteamdensityvariation,amodelofoptimalsteamvelocityandthicknessofthermalinsulationlayerhasbeenestablished.Thetargetfunctionofthemodelistheannualoverallcostofthepipeline,includingpressurereductionduetofriction,temperaturedropduetoheatdissipation,depreciationchargeofthepipelineproperandthermalinsulationmaterials,aswellasexpensesofmainlenanceetc.Atthesametime,correspondingsolution-findingsoftwarehasbeendevelopedbyconsideringvariationofsteamdensity.Thepracticalcalculationresultsshow,thereisanoptimalsteamvelocity,whichisdecreasingalongwithpressure-anddensity-increasing.UnderPresenteco2nomicconditions,theoptimalflowvelocityofmedium-pressuresteamisonly1020m/s.Ifthepipelineismuchlonger,itisnecessarytoconsiderthevariationofsteamden2sityduringthetimeofdesignandcalculation.TESTANDRESEARCHOFFUSIONPROPERTYFORASHMIXTURESFROMCOAL-WATERSLURRYLANZe-quanetal(13)TheFusiontemperatureanddynamicbehaviorofthefusionprocessforashmixturesbeingcomposedofrepresentativeashsampletakenfromtwocoal-waterslurryfiredboilershavebeendeeplystudied.Itwasdiscoveredthatthefusiontemperatureofashmixturemadeupfromtwosingleashsampleswithsimilarfusionbehaviorandhigherfusionpointsisstillhigher,butthefusiontemperatureofashmixturemadeupfromtwoashsampleswithverylowandveryhighfusionpointsisgraduallyheightenedalongwithincreasingthemixedratioofashsamplewithhigherfusionpoint.ASTUDYONCOMBUSTIONPERFORMANCEOFXISHANBITUMINOUSCOAL,YANGQUANANTHRACITICCOAL,ANDTHEIRBLENDEDCOALGONGBai-yunetal(17)Testandanalysisstudyonbehaviorofignition,combustion,burn-out,andslaggingpropertyforsinglecoalsortsandtheirblendedcoalhadbeencarriedoutbyusingthermalbalanceandunidimensionalflameoven.Theinfluenceofvolatilecontentandadmixratiouponcombustionperformanceofblendedcoalhasbeenpreliminarilyanalysed,itissug2gustedthattheequivalentvolatilecontentvaluecanbeusedasimportantbasisfordeterminingoperationalparametersduringthetimeofburningblendedcoal.Basedontestre2sults,theoptimaladmixratioofblendedcoalisdeterminedbymeansoffuzzymathematicmethodtocarryoutcomprehensivejudgment,providingscientificbasisforresonablecombustionofblendedcoal.CAUSEANALYSISOFLOWERBURN-UPRATIOINANTHRACITEFIRINGBOILERSWITHW-SHAPEDFLAMEANDTWIN-ARCHCOMBUSTIONSHANFENG-lingetal(21)Throughanalysisandstudyo