Pulverized solid fuel nozzle assembly

F - Mech Eng,Light,Heat,Weapons – 23 – D

Patent

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Details

F23D 1/00 (2006.01)

Patent

CA 2644988

A pulverized solid fuel nozzle assembly (34) includes a fuel feed pipe (38) and a nozzle tip (36) pivotally secured relative to the fuel feed pipe (38). The fuel feed pipe (38) includes a generally cylindrical shell (99) having a round outlet end (102) and a bulbous protrusion (106) disposed around a perimeter of the round outlet end (102). The nozzle tip (36) includes an inner shell (40) having a round inlet end (108) arranged in concentric relationship with the round outlet end (102) of the generally cylindrical shell (99). The round inlet end (108) is disposed around the bulbous protrusion (106) for forming a seal between the inner shell (40) and the fuel feed pipe (38). The nozzle tip (36) also includes an outer shell (39) arranged in coaxial relationship with the inner shell (40), and an annular air channel (42) disposed between the inner and outer shells (40), (39). The nozzle tip (36) is pivotable about at least one axis (52), (250) for directing a stream of pulverized solid fuel from the inner shell (40).

La présente invention concerne un ensemble de buse de combustible solide pulvérisé (34) comportant un conduit d'amenée de combustible (38) et un embout de buse (36) fixé en pivotement par rapport au conduit d'amenée de combustible (38). Le conduit d'amenée de combustible (38) comporte une enveloppe de forme globalement cylindrique (99) présentant une extrémité de sortie arrondie (102) et une saillie bombée (106) disposée autour d'un périmètre de l'extrémité de sortie arrondie (102). L'embout de buse (36) comporte une enveloppe intérieure (40) comprenant une extrémité d'admission arrondie (108) disposée en relation concentrique avec l'extrémité de sortie arrondie (102) de l'enveloppe de forme globalement cylindrique (99). L'extrémité d'admission arrondie (108) est disposée autour de la saillie bombée (106) pour former un joint étanche entre l'enveloppe intérieure (40) et le conduit d'amenée de combustible (38). L'embout de buse (36) comporte également une enveloppe extérieure (39) disposée en relation coaxiale avec l'enveloppe intérieure (40), et un passage d'air annulaire entre les enveloppes intérieure et extérieure (40, 39). L'embout de buse (36) est apte à pivoter autour d'au moins un axe (52), (250) pour orienter un flux de combustible solide pulvérisé provenant de l'enveloppe intérieure (40).

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