Recombiner element

G - Physics – 21 – C

Patent

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Details

G21C 19/317 (2006.01) G21C 9/06 (2006.01)

Patent

CA 2709226

The invention relates to a recombiner element (4) comprising a plurality of catalyst elements (8) that are arranged in a common housing (6) and that trigger a recombination reaction with oxygen when hydrogen is carried along in a feed gas flow, the housing (6) surrounding the catalyst elements (8), which are arranged therein, in a funnel-type way in such a manner that the heat released by the recombination reaction supports the gas flow inside the housing (6) by a convection effect, which recombiner element safeguards a reliable removal of the hydrogen from the gas mixture with an especially high degree of operational safety even under comparatively extreme conditions or scenarios of said type. According to the invention, at least one of the catalyst elements (8) arranged inside the housing (6) has a predetermined ignition zone (20) in which a surface temperature of more than 560°C is produced in the convective operation at ambient conditions of approximately 1 bar and 100°C at a hydrogen concentration in the feed gas flow of more than 5% by volume.

L'invention concerne un élément recombineur (4) comportant une pluralité d'éléments catalyseurs (8) disposés dans un boîtier commun (6), déclenchant une réaction de recombinaison avec l'oxygène sur de l'hydrogène entraîné dans un flux de gaz entrant. Le boîtier (6) entoure les éléments catalyseurs (8) qu'il contient à la manière d'une cheminée, de telle façon que la chaleur libérée lors de la réaction de recombinaison assiste le flux de gaz dans le boîtier (6) par convection. L'invention vise à mettre en oeuvre un tel élément recombineur permettant une élimination efficace de l'hydrogène dans le mélange gazeux avec une grande sécurité de fonctionnement, même dans des conditions extrêmes. A cet effet, au moins un des éléments catalyseurs (8) disposés dans le boîtier (6) présente une zone d'allumage de consigne (20) dans laquelle la température de surface atteint plus de 560 °C en mode de convection, pour des conditions ambiantes d'environ 1 bar et 100 °C, et une concentration d'hydrogène de plus de 5 % en volume dans le flux de gaz entrant.

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