Burner device with a porous body

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

Patent

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Details

F23C 99/00 (2006.01) F23G 7/06 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2584193

The invention relates to burner device comprising a burner chamber (26) filled at least partially by a porous body (28), an evaporation zone (12) upstream of the burner chamber (26) for evaporating liquid fuel supplied via a fuel inlet line (16), an igniter (30) for igniting a combustion mixture of evaporated liquid fuel and combustion air supplied via a combustion air inlet line (18) to the evaporation zone (12) as well as an exhaust discharge (38) downstream of the combustion chamber (26). The invention is characterized in that between the evaporation zone (14) and the combustion chamber (26) a mixing zone (20) is disposed in which fuel gas introduced via a fuel gas inlet line (22, 24) is mixed with the combustion air and/or the combustion mixture. The invention also relates to use of the burner device as an after-burner in a fuel cell stack, as well as it relating to a corresponding fuel cell stack.

L'invention concerne un dispositif brûleur présentant une chambre de combustion (26) au moins partiellement remplie d'un corps poreux (28), une zone d'évaporation (12) placée en amont de la chambre de combustion (26) et permettant l'évaporation du fluide combustible amené par une conduite d'alimentation en combustible (16), un dispositif d'allumage (30) destiné à allumer un mélange de combustion, constitué de fluide combustible évaporé et d'air de combustion amené par une conduite d'alimentation en air de combustion (18) de la zone d'évaporation (12), ainsi qu'une conduite d'évacuation de gaz brûlés (38) placée en aval de la chambre de combustion (26). Cette invention se caractérise en ce qu'une zone de mélange (20) est placée entre la zone d'évaporation (14) et la chambre de combustion (26), zone de mélange dans laquelle le gaz de combustion amené par une conduite d'alimentation en gaz de combustion (22, 24) de la zone de mélange (20) peut être mélangé avec l'air de combustion et/ou le mélange de combustion. Ladite invention concerne également l'utilisation du dispositif brûleur comme postbrûleur dans un système de pile à combustible ainsi qu'un système de pile à combustible correspondant.

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