简介：Thespecialdesignforthefurnaceandburnerofboilersburningligniteisanalyzedandthetypeselectionofthepulverizingsystemisdiscussedbytakingaccountofthelignite’scharacteristicsofhighmoisture,lowheatingvalueandlowashfusiontemperature.Theimpactofsuchcharacteristicsonthetypeselectionofburningequipmentandpulverizingsystemsfortheligniteboilerisstudied.Thevaluerangesofthefurnacecharacteristicparametersfortheligniteboilerarerecommended.Fortheoldlignite,thepremixperiodintheburnershouldnotbetoolonginordertoavoidslaggingandthevelocityoftheprimaryairissuggestedtobebetween17m/sand22m/s.Thedirect-flowburnerwithtangentialfiringispreferredforlignitewiththemoisturehigherthan35%.Themedium-speedmillisbettertobeusedforlignitewiththemoisturelessthan35%,whileforlignitewiththemoisturehigherthan40%thefanmillshouldbethefirstchoice.

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简介：Thetypeselectionofburningequipmentforboilersisaffectedsignificantlybytheslaggingcharacteristicsofcoal.Basedontheengineeringstatisticsmethod,thedesignedfurnaceparametersareobtainedfromthe600-MWand1000-MWboilerswithtangentialfiringandwallfiring.Thepowerandarrangementoftheburnersareanalyzed.Theirimpactsonslaggingonheatingsurfacesandthecarboncontentsintheashandcindersarealsodiscussed.Thermalparametersoffurnacearerecommendedforboilersof600MWand1000MWfiringslaggingcoalinthedesign.Thestaticorrotaryclassifiershouldbethefirstchoiceforthepulverizingsystem.

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简介：Ⅰ.PrefaceStartingisoneoftheimportanttopicsofasynchronousmo-tors.Variedmethodsoveralongperiodoftimeforimprovingthestartingcharacteristicsoftheasynchronousmotorshadbeenadoptedbydomesticandforeignelectricalengineers.Themethodswhichinnovateontheinternalstructureoftheelectricalmotorssoastoimprovethestartingcharacteristicsfallintotwokinds.Thefirstoneistochangethestructureofthestatorwindingofthemotors,forinstance,the"star-delta"starting,the"prolongedsidetriangle"

简介：Basedonthesuccessfuloperationof1200kWturbo-typemodelgeneratorwithseparatedevaporativecoolingofbothstatorandrotor,a50MVAturbo-typesynchronouscondenserwithevaporativecoolingstatorwasconstructedandputintoopera-tiononMarch8,1991atXijiaoSubstationofShanghaiPowerBu-reau.Thisisthefirstoneintheworldthatappliedtheevaporativecoolingtechniqueonturbo-generatorinindustrialscale.