简介：Thisstudycomparestheregenerativeradiant-tubeheaterwiththetraditionalradiant-tubeheater,showingtheregenerativeradiant-tubeheatershavemanyadvantagesinfuelconsumption.Basedontheexperienceofchangingaheatingsystemwithtraditionalradiant-tubeburnerstoaheatingsystemwithregenerativecombustion,propositionsaregivenforthecombustioncontrolsystem,pilotburner,flamedetectionandfortroublepreventioninrebuildingthecontinuousannealingproductionline(CAPL)andthecontinuousgalvanizingline(CGL).

简介：Athree-dimensionalmathematicalmodelofthecombustionofpulverizedcoalandcokehasbeendeveloped.Themodelisappliedtotheblowpipe-tuyere-raceway-cokebedregioninanironmakingblastfurnaceinonecomputationaldomain,whichincludestwoparts:pulverizedcoalcombustionmodelintheblowpipe-tuyere-racewaycavityandthecoal/cokecombustionmodelinthesurroundingcokebed.Theeffectsofcoalpropertiesareexaminedcomprehensively,intermsofcoalburnoutandgasspeciesdistributions.TheresultsindicatethatusingacoaloffineparticlesizeorhighVMcontentcouldimproveburnoutandwouldaffectthegascompositionconsiderably.Theburnoutisexaminedintwoways:comparedwithburnoutalongtuyereaxis,burnoutovertheracewaysurfaceisamoresensitiveandsensibleparametertodescribetheamountofunburntcharenteringthecokebed.Themodelisusefulforexaminingtheflow-thermo-chemicalcharacteristicsofthepulverizedcoalinjection(PCI)processundervariousconditionsinablastfurnace.