Diffuser for coal nozzle burner

Details Diffuser for coal nozzle burner Diffuser for coal nozzle burner

F - Mech Eng,Light,Heat,Weapons

23

D

F23D 1/00 (2006.01)

Patent

CA 2177117

A diffuser for a coal burner has a coal nozzle with an axis and an inner surface. The diffuser comprises a reducing area cone which has tapering upstream and downstream ends, for positioning in a coal nozzle at the coal nozzle axis. A frusto-conical shroud has a small diameter upstream end and a large diameter downstream end, positioned around the reducing area cone. A plurality of support legs is connected to the reducing area cone and extends radially outwardly through the shroud for connecting to the coal nozzle. Each of the support legs is inclined at an acute angle to the axis of the coal nozzle for evenly spreading pulverized coal supplied through the coal nozzle and past the diffuser.

Le diffuseur d'un brûleur au charbon est doté d'une busette à charbon possédant un axe et une surface interne. Le diffuseur comporte des extrémités coniques amont et aval destinées au positionnement à l'intérieur de la busette à charbon et dans l'axe de celle-ci. Une enveloppe frusto-conique présentant un faible diamètre amont et un grand diamètre aval est positionnée autour du cône de restriction. Une pluralité de pattes de support sont reliées au cône de restriction et se prolongent radialement vers l'extérieur et à travers l'enveloppe aux fins de fixation à la busette. Chacune des pattes de support définit un angle aigu par rapport à l'axe de la busette, pour assurer une distribution uniforme du charbon pulvérisé par la busette à charbon au-delà du diffuseur.

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