Dark radiator

Abstract

A dark radiator includes a first burner, a fan and a radiant tube. The first burner is connected to a fuel gas supply, the fan is designed to supply the first burner with combustion air and the first burner is designed to output a flame into the radiant tube. The fuel gas supply is connected to a hydrogen source as a fuel gas source and a secondary burner is connected downstream in the radiant tube spaced apart from the first burner functioning as the primary burner in the flame direction. The fuel gas supply thereof is connected to a hydrogen source as a fuel gas source and the exhaust gas flow of the upstream primary burner is supplied to the secondary burner as combustion air.

1 . A dark radiator having a first burner, a fan ( 2 ), and a radiant tube ( 3 ), wherein the first burner is connected to a fuel gas supply, wherein the fan ( 2 ) is set up for supplying combustion air to the first burner, wherein the first burner is set up for outputting a flame into the radiant tube ( 3 ), wherein the fuel gas supply is connected to a hydrogen source as the fuel gas source, and wherein a secondary burner ( 4 ) follows the first burner that serves as the primary burner ( 1 ), in the radiant tube ( 3 ), at a distance from the first in the flame direction, the fuel gas feed of which secondary burner is connected to a hydrogen source as the fuel gas source, wherein the exhaust gas stream of the upstream primary burner ( 1 ) is supplied to the secondary burner ( 4 ) as combustion air. 
     
     
         2 . The dark radiator according to  claim 1 , wherein the fan ( 2 ) is connected to an ejector having a suction connector connected to the hydrogen supply, wherein the combustion air drawn in by the fan ( 2 ) serves as a driving medium, so that a hydrogen/combustion air mixture is supplied to the burner ( 1 ) by the fan ( 2 ). 
     
     
         3 . The dark radiator according to  claim 1 , wherein an equalization element ( 31 ) is arranged between the primary burner ( 1 ) and the secondary burner ( 4 ), to equalize thermally related length changes within the radiant tube ( 3 ). 
     
     
         4 . The dark radiator according to  claim 1 , wherein the primary burner ( 1 ) comprises a gas jet, wherein the fan ( 2 ) is set up for flushing the gas jet ( 11 ) with combustion air, and whereby no fuel gas mixing chamber is provided for pre-mixing fuel gas and combustion air, and the gas jet is supplied exclusively with fuel gas. 
     
     
         5 . The dark radiator according to  claim 1 , wherein the primary burner ( 1 ) comprises a gas jet ( 11 ) and a mixing tube ( 14 ), which is supplied with hydrogen by the gas jet ( 11 ), wherein the mixing tube ( 14 ) is flushed with combustion air by the fan ( 2 ), wherein the gas jet ( 11 ) forms an ejector with the mixing tube ( 14 ), wherein the driving medium of the ejector is hydrogen introduced by the gas jet ( 11 ) and the medium drawn into the mixing tube ( 14 ) is combustion air situated in the radiant tube ( 3 ), and wherein an ignition apparatus ( 13 ) for igniting the hydrogen/combustion air mixture follows at a distance from the mixing tube ( 14 ), in the flame direction. 
     
     
         6 . The dark radiator according to  claim 1 , wherein a combustion air mixing chamber is arranged to precede the primary burner ( 1 ) in the flame direction, which chamber is connected to a combustion air source and to the exhaust gas discharge line. 
     
     
         7 . The dark radiator according to  claim 6 , wherein the fan ( 2 ) is arranged to precede the burner ( 1 ) in the flame direction, and the combustion air mixing chamber is arranged within the fan ( 2 ). 
     
     
         8 . The dark radiator according to  claim 6 , wherein the connection between the exhaust gas discharge line and the combustion air mixing chamber comprises a branching-off device ( 5 ) by means of which the ratio of the branched-off exhaust gas volume stream and the combustion air volume stream is determined. 
     
     
         9 . The dark radiator according to  claim 8 , wherein the branching-off device ( 5 ) comprises an adjustment device by means of which the ratio of the exhaust gas volume stream and the combustion air volume stream can be set.