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1、第33卷第35期中国电机工程学报Vol.33No.35Dec.15,20132013年12月15日ProceedingsoftheCSEE©2013Chin.Soc.forElec.Eng.15文章编号：0258-8013(2013)35-0015-06中图分类号：TK224文献标志码：A学科分类号：470·20中国动力煤特性对绝热燃烧温度的影响王世昌，胡刚刚(华北电力大学能源与动力工程学院，北京市昌平区102206)ImpactofChinesePowerCoalPropertiesonAdiaba
2、ticCombustionTemperaturesWANGShichang,HUGanggang(SchoolofEnergy,PowerandMechanicalEngineering,NorthChinaElectricPowerUniversity,ChangpingDistrict,Beijing102206,China)ABSTRACT:Theadiabaticcombustiontemperatureof中国动力煤而言，w(Car)是影响Qnet,ar的最重要正面参数，steamingco
3、als,denotedasta,isoneofthemostimportantw(Mar)是影响Qnet,ar的最重要负面参数。此外，由煤的w(Vdaf)parametersforthermalcalculationofpulverizedcoalfired决定的过量空气系数α对ta具有非线性的负面影响。boilers.Thedifferenceoftaandthefluegastemperatureatthe关键词：中国动力煤；特性参数；绝热燃烧温度；煤粉锅炉；exitofthefurnace(ta
4、−t'f')determinestheheatingpowerof热力计算furnacesurfaces,suchaswaterwallsandplatensuperheaters.Thispapercalculatestheadiabaticcombustiontemperaturesof0INTRODUCTION158kindsofChinesesteamingcoalsanddiscussestheimpactofcoalpropertiesonta.Calculationresultsreve
5、aledthatwithWhen1.0kgcoalisburnedinthefurnaceofatheincreaseofthelowheatingvalue(Qnet,ar=pulverizedcoalfiredboiler(PCB)oracirculating10.84~29.49MJ/kg),theadiabaticcombustiontemperatureoffluidizedbedboiler(CFBB),theheatingvalueisChinesesteamingcoals(ta)ri
6、sesfrom1458℃to1959℃,andreleasedandpartoftheheatingvalueisabsorbedby0thetheoreticaladiabaticcombustiontemperature(ta)isaboutthesurfacesinthefurnace,suchasthewaterwalls,254~352℃higherthanta.Thelowheatingvalue(Qnet,ar)hasanapproximatelylinearpositiveimpact
7、onta.ForChinesetheplatensuperheaters,etc.Thefluegastemperaturesteamingcoals,w(Car)isthemostimportantparameteratthefurnaceexit(t'',℃)isdeterminedbythesoftenpositivelyaffectingQnet,ar,andw(Mar)isthemostimportanttemperatureoftheflyash(ST,℃),thehighestfluep
8、arameternegativelyaffectingQnet,ar.Besides,theexcessiveairgastemperatureofthefluegas(ta,℃)inthefurnacecoefficient,denotedasα,whichisdeterminedbyw(Vdaf)ofisrelativetopowercoalproperties,suchasthelowcoal,hasanonlinearlynegativeimpa
