Hydrogen combustion burner

Abstract

A hydrogen combustion burner utilizing hydrogen gas as a fuel gas includes a burner body with an air-fuel mixture chamber into which an air-fuel mixture of hydrogen gas and primary air is supplied and a combustion plate portion covering an opening surface, which faces the air-fuel mixture chamber, of the burner body. In the hydrogen combustion burner, the air-fuel mixture ejects from the combustion plate portion and undergoes combustion. The hydrogen combustion burner is configured to effectively suppress backfire. The combustion plate portion includes a sintered sheet by sintering an aggregate of metallic fibers, and the aggregate is not formed by weaving or knitting the metallic fibers.

What is claimed is: 
     
         1 . A hydrogen combustion burner utilizing hydrogen gas as a fuel gas, comprising,
 a burner body with an air-fuel mixture chamber into which an air-fuel mixture of the hydrogen gas and primary air is supplied; and   a combustion plate portion covering an opening surface, which faces the air-fuel mixture chamber, of the burner body,   wherein the air-fuel mixture ejects from the combustion plate portion and undergoes combustion, and   wherein the combustion plate portion comprises a sintered sheet by sintering an aggregate of metallic fibers and the aggregate is not made by weaving or knitting the metallic fibers.   
     
     
         2 . The hydrogen combustion burner as claimed in  claim 1 , wherein the metallic fibers are composed of Fe (iron) and at least one element selected from the group consisting of Al (aluminum), Cr (chromium), Mn (manganese), and Si (silicon), or a carbide(s) thereof, and weight per unit area during sintering the sintered sheet is set within a range of 1,200 g/m 2  to 1,800 g/m 2 . 
     
     
         3 . The hydrogen combustion burner as claimed in  claim 2 , wherein a diameter of each metallic fiber ranges from 50 μm to 100 μm. 
     
     
         4 . The hydrogen combustion burner as claimed in  claim 1 , wherein porosity of the sintered sheet ranges from 60% to 80%. 
     
     
         5 . The hydrogen combustion burner as claimed in  claim 1 , wherein the sintered sheet is formed into a convex bending shape towards a downstream side in a flow direction of the air-fuel mixture.