Hydrogen combustion device having hydrogen pipe

Abstract

A hydrogen combustion device includes a casing 30 , a hydrogen source, a hydrogen pipe 39 to supply hydrogen gas from the hydrogen source into the casing 30 , a mixer 10 on the downstream side of the pipe 39 , for stirring a mixed gas and a combustion catalyst 20 . The hydrogen pipe 39 has a hydrogen pipe body 40 and a hydrogen ejecting part 41 with hydrogen ejecting orifices 42 . In the hydrogen combustion device, the hydrogen ejecting part 41 is positioned at a substantial center in the cross section of an air passage in the casing 30 , extending along the flowing direction of the airflow in the air passage. The hydrogen ejecting orifices 40 are arranged so that their axes extend in the radial direction of the hydrogen ejecting part 41 , substantially perpendicularly to the flowing direction of the airflow.

1 . A hydrogen combustion device comprising: 
 a casing defining a passage for airflow therein;    a hydrogen source arranged outside the casing;    a hydrogen pipe arranged so as to extend from the hydrogen source into the passage for airflow thereby to supply hydrogen gas from the hydrogen source into the airflow flowing in the casing, the hydrogen pipe having a hydrogen pipe body and a hydrogen ejecting part arranged at the leading end of the hydrogen pipe body and also provided with a plurality of hydrogen ejecting orifices;    a mixer arranged close to the hydrogen pipe, for stirring the mixed gas; and    a combustion catalyst arranged on the downstream side of the mixer in the flowing direction of the airflow to cause an oxidative reaction of the mixed gas thereby generating heat, wherein    the hydrogen ejecting part is positioned at a substantial center in the cross section of the passage defined in the casing and also arranged so as to extend along the flowing direction of the airflow, and    the hydrogen ejecting orifices are arranged so that their axes extend in the radial direction of the hydrogen ejecting part, substantially perpendicularly to the flowing direction of the airflow.    
     
     
         2 . The hydrogen combustion device of  claim 1 , wherein 
 the hydrogen ejecting part is arranged so as to face the upstream side of the airflow and is provided with a tapered leading end.    
     
     
         3 . The hydrogen combustion device of  claim 1 , wherein 
 the hydrogen ejecting part is formed to have the same diameter as that of the hydrogen pipe body and the hydrogen ejecting part is welded to the hydrogen pipe body perpendicularly.    
     
     
         4 . The front body structure of  claim 1 , wherein 
 the hydrogen pipe is arranged in a manner that the hydrogen ejecting part takes its position on the upstream side of the mixer in the flowing direction of the airflow, while the hydrogen pipe body takes its position inside the mixer.    
     
     
         5 . The front body structure of  claim 1 , wherein the hydrogen ejecting orifices have different diameters.  
     
     
         6 . The front body structure of  claim 5 , wherein the hydrogen ejecting orifice on the upstream side in the flowing direction of hydrogen gas flowing in a straight part of the hydrogen pipe body is formed to have a small diameter in comparison with the diameter of the hydrogen ejecting orifice on the downstream side in the flowing direction of hydrogen gas flowing in the straight part of the hydrogen pipe body.  
     
     
         7 . The front body structure of  claim 5 , wherein the hydrogen pipe body includes a curved portion, the hydrogen ejecting orifice on an outer circumferential side of the curved portion is formed to have a small diameter in comparison with the diameter of the hydrogen ejecting orifice on an inner circumferential side of the curved portion of the hydrogen pipe body.