Plant for manufacturing cement clinker

Details Plant for manufacturing cement clinker Plant for manufacturing cement clinker

C - Chemistry, Metallurgy

04

B

C04B 7/43 (2006.01) F27B 7/20 (2006.01)

Patent

CA 2422102

Described is a plant for manufacturing cement clinker comprising a preheater (1) which comprises at least one last cyclone (1d) and at least one next-to- last cyclone (1c) which is connected in series via a gas duct (2c) to and fed with gas from the last cyclone (1d), a calciner (3) which comprises at least one inlet opening (9) for introducing preheated raw meal from the last cyclone (1d), and which is connected to a subsequent separating cyclone (4), a gas duct (2d) which connects the separating cyclone (4) to the last cyclone (1d), and which comprises at least one inlet opening (11) for introducing preheated raw meal from the next-to-last cyclone (1c). The plant is peculiar in that the inlet opening (11) for introducing preheated raw meal from the next-to-last cyclone (1c) into the gas duct (2d) which connects the separating cyclone (4) to the last cyclone (1d) in a vertical plane is located under at least one inlet opening (9) for introducing preheated raw meal from the last cyclone (1d) into the calciner. Hence, without affecting the installation height of the preheater, it will be possible to locate the last cyclone (1d) of the preheater (1) at an arbitrary height relative to the calciner (3), and preheated raw meal from the last cyclone (1d) can therefore be introduced at any point into the calciner (3) without any use of lifting equipment.

L'invention concerne une installation de fabrication de clinker de ciment comprenant un préchauffeur (1) présentant au moins un dernier cyclone (1d) et au moins un avant-dernier cyclone (1c) qui est connecté en série au dernier, via un conduit de gaz (2c) et alimenté en gaz provenant du dernier cyclone (1d), un four à calciner (3) présentant au moins une ouverture d'entrée (9) pour l'introduction de farine brute préchauffée provenant du dernier cyclone (1d) et qui est connectée à un cyclone de séparation subséquent (4), un conduit de gaz (2d) connectant le cyclone de séparation (4) au dernier cyclone (1d) et qui comprend au moins une ouverture d'entrée (11) pour l'introduction de farine brute préchauffée provenant de l'avant-dernier cyclone (1c). L'installation est caractérisée en ce que l'ouverture d'entrée (11) pour l'introduction de farine brute préchauffée provenant de l'avant-dernier cyclone (1c) dans le conduit de gaz (2d) connectant le cyclone de séparation (4) au dernier cyclone (1d) dans un plan vertical est positionnée au-dessous d'au moins une ouverture d'entrée (9) pour l'introduction de farine brute préchauffée provenant du dernier cyclone (1d) dans le four à calciner. Ainsi, sans affecter la hauteur d'installation du préchaufeur, il est possible de disposer le dernier cyclone (1d) du préchauffeur (1) à une hauteur arbitraire par rapport au four à calciner (3), et la farine brute préchauffée provenant du dernier cyclone (1d) peut donc être introduite en tout point dans le four à calciner (3) sana recourir à un matériel de levage.

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