Patent ID: 7700055

Claim:
A hydrogen combustion system comprising: an external cylinder ( 1 ) constituting the exterior of a double tube construction; an internal cylinder ( 2 ) formed by a porous metal plate constituting the interior of said double tube construction; a hydrogen combustion catalyst ( 4 ) supported by precious metals on a spherical ceramic support surface, being formed in a pellet state and loaded in said internal cylinder ( 2 ); an insert pipe ( 3 ) formed by a porous metal plate inserted in the center of said internal cylinder ( 2 ); a lid ( 10 ) of a non-porous metal plate provided at the top of said insert pipe ( 3 ) and the same kind of catalyst ( 11 ) as said hydrogen combustion catalyst ( 4 ) being packed up to the part corresponding to 10-54% of the pipe length of said insert pipe ( 3 ) from the top of said insert pipe ( 3 ); a pre-heating heater ( 5 ) located between said insert pipe ( 3 ) and said internal cylinder ( 2 ) to preheat said hydrogen combustion catalyst ( 4 ) to an ambient atmosphere of over catalytic reaction temperatures; a hydrogen gas introducing port ( 8 ) connected to said insert pipe ( 3 ); and an air introducing port ( 9 ) provided at a bottom of said external cylinder ( 1 ) and located between said external cylinder ( 1 ) and said internal cylinder ( 2 ); characterized in that hydrogen gas supplied to said internal cylinder ( 2 ) from said hydrogen gas introducing port ( 8 ) via said insert pipe ( 3 ) is combusted with air introduced into said internal cylinder ( 2 ) from said air introducing port ( 9 ) through the gap between said external cylinder ( 1 ) and said internal cylinder ( 2 ), by catalytic action of the hydrogen combustion catalyst ( 4 ) pre-heated to an ambient atmosphere of over catalytic reaction temperatures by said preheating heater ( 5 ) so as to be discharged as safe water vapor.