Rotary kiln burner

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

Patent

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Details

F23C 7/00 (2006.01) F23D 1/00 (2006.01) F23L 15/00 (2006.01) F27B 7/34 (2006.01) F27D 99/00 (2010.01)

Patent

CA 2397869

A direct coal fired burner system (22) for a rotary kiln (20) in which the burner (36) has a multi-barrel construction through which primary air for conveying coal is heated with tertiary air sourced from the rotary kiln (20), and the shape of the emerging flame is controlled by a first annulus of swirling tertiary air adjacent the primary airstream and by a second annulus of laminar tertiary air defining an outer envelope for the flame. The volume and relative velocities of air in the tertiary air supplies are all controllable through the use of respective dampers provided in tertiary air supply conduits.

Cette invention se rapporte à un système de brûleur à combustion directe par charbon (22) pour un four rotatif (20), dans lequel le brûleur (36) possède une structure multicylindre à travers laquelle l'air primaire d'acheminement du charbon est chauffé avec de l'air tertiaire provenant du four rotatif (20), et la forme de la flamme sortante est régulée par une première couronne d'air tertiaire tourbillonnant adjacente au flux d'air primaire et par une seconde couronne d'air tertiaire laminaire définissant une enveloppe externe pour la flamme. Le volume et les vitesses relatives de l'air dans les sources d'air tertiaire sont également régulables grâce à l'utilisation de registres respectifs placés dans les conduits d'amenés de l'air tertiaire.

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