燃料气与空气的混合物在燃烧焰面法线方向的速度分量大于该混合物的火焰传播速度，则火焰被推出火孔，开始离焰，直到火焰被吹跑造成火焰熄火——脱火。燃烧器发生脱火是不允许的。Thevelocitycomponentofthemixtureoffuelgasandairinthenormaldirectionofcombustionflameislargerthanthatofthemixture,andtheflameispushedoutofthefireholeandstartstole***etheflameuntiltheflameisblownaway,causingtheflametogoout.Itisnotallowedtoremovefirefromtheburner.连续加热炉通常使用气体燃料、重油或粉煤，有的烧块煤。为了有效地利用废气热量，在烟道内安装预热空气和煤气的换热器，或安装余热锅炉。Continuousheatingfurnaceusuallyusegasfuel,he***yoilorcoal,andsomecoalburning.Inordertoeffectivelyutilizeexhaustheat,apreheatairandgasheatexchangerisinstalledintheflue,oraHRSGisinstalled.靠炉底或水冷金属梁的上升、前进、下降、后退的动作把料坯一步一步地移送前进的连续加热炉。炉子有固定炉底和步进炉底，或者有固定梁和步进梁。Dependingontheactionofrising,advancing,fallingandbackingofthefurnacebottomorthewater-cooledmetalbeam,thematerialistransferredtothecontinuousreheatingfurnacestepbystep.Thefurnacehasfixedfurnacebottomandwalkingfurnacebottom,ortherearefixedbeamandwalkingbeam.紧迫停炉时，制止只用外表风封闭控制阀，一定要封闭炉前手阀。如遇被加热介质中止，应当即救活，炉膛通入蒸汽。炉出人员及过热蒸汽压力计；调理风门及烟道挡板；紧迫放空设备；防爆门；炉膛及回弯头箱救活蒸汽线。Whenthefurnaceisshutdown,theouterclosedvalvemustbestopped.Thehandvalvemustbeclosed.Iftheheatingmediumisdiscontinued,itshouldbes***ed,andthefurnaceisconnectedwithsteam.Furnacepersonnelandsuperheatedsteampressuregauge;conditioningairvalveandfluebaffle;urgentemptyingequipment;explosion-proofdoor;furnaceandelbowboxtos***esteamline.)