Rotary furnace with tubular central flow

Details Rotary furnace with tubular central flow Rotary furnace with tubular central flow

F - Mech Eng,Light,Heat,Weapons

27

B

F27B 13/02 (2006.01) F27B 13/06 (2006.01)

Patent

CA 2334994

The invention concerns a furnace for baking carbon bricks comprising, in the longitudinal direction X, a series of chambers, each of the chambers comprising, in the transverse direction Y, alternating hollow partitions (3) ensuring a gas flow for heating fuel gas or a cooling air gas flow, and cells containing the carbon bricks to be baked, each of said hollow partitions (3) of a chamber communicating with a partition upstream and/or downstream, so as to form a duct enabling the gas flow to circulate. Each of said partitions of a chamber comprises, in the plane X-Z, two vertical side walls (38), and, in the transverse direction Y, elements deflecting said gas flow and maintaining a constant spacing of said side walls (38). The invention is characterised in that each partition (3) comprises means for preserving, over at least one third of length L of said partition, a gas flow with flow rate D homogeneously distributed over said partition entire cross-section S, with homogeneity level of said flow rate distribution defined by: 2y.D-0.5y.D / y.S, where 2y.D-0.5 y.D represents the extent of the range of flow rate D corresponding to a fraction y of said cross-section S, and where y is not more than 0.25.

Image Le four pour la cuisson de blocs carbonés comprend, dans le sens long X, une succession de chambres, chacune des chambres comprenant, dans le sens travers Y, une alternance de cloisons creuses (3) assurant la circulation d'un flux gazeux de réchauffage de gaz de combustion ou un flux gazeux d'air de refroidissement, et d'alvéoles contenant les blocs carbonés à cuire, chacune desdites cloisons creuses (3) d'une chambre étant en communication avec une cloison en amont et/ou en aval, de manière à former un conduit assurant la circulation dudit flux gazeux, chacune desdites cloisons d'une chambre comprenant, dans le plan X-Z, deux parois latérales verticales (38), et, dans le sens travers Y, des éléments assurant la déflexion dudit flux gazeux et maintenant un écartement constant desdites parois latérales (38), et est caractérisé en ce que chaque cloison (3) comprend un moyen pour conserver, sur au moins un tiers de la longueur L de ladite cloison, un flux gazeux de débit D réparti de manière homogène sur la totalité de la section droite S de ladite cloison, avec un niveau d'homogénéité de ladite répartition du débit D défini par "2y.D-0,5y.D / y.S", où "2y.D- 0,5y.D" désigne l'étendue de la plage du débit D correspondant à une fraction y de ladite section droite S, et où y est au plus égal à 0,25.

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