Burner comprising a pre-combustion chamber

Abstract

A gas burner for use in low-oxygen environments in which the oxygen concentration is insufficient to ensure complete combustion. The burner includes a central air supply that is annularly surrounded by a gas supply, thereby preventing the fuel from burning out with a delay in places where burn-out is detrimental to a system or plant.

1 . A gas burner for use in an oxygen-impoverished environment, the oxygen concentration of which is insufficient for supporting a complete combustion, wherein the burner has a central air supply pipe which is annularly encompassed by a gas supply pipe. 
     
     
         2 . The gas burner as claimed in  claim 1 , wherein provision is made for a control device in the form of a throttle valve, which, by an adjustment of the supplied air flow and fuel flow, sets an air/fuel ratio λ to a value of 0.05 to 0.3, wherein the control device, by means of a closed-loop control device with a control loop, sets the desired λ value via at least one of a measured temperature in the combustion chamber or a spectrometrically measured gas concentration. 
     
     
         3 . The gas burner as claimed in  claim 1 , wherein, in the region of the mixing of fuel and air as oxidation means, an annularly disposed group of nozzles, forming a spiral vortex or a laminar flow, is arranged, via which the fuel is mixed with the centrally injected air. 
     
     
         4 . The gas burner as claimed in  claim 1 , wherein provision is made for at least one additional pilot burner which, in the region of the combustion chamber, reliably ignites the mixture of injected fuel and oxidation means. 
     
     
         5 . The gas burner as claimed in  claim 1 , wherein the inner walls of the burner have at least one air suction nozzle, by means of which, sucked-in ambient air flows into the burner in the region of the walls of said burner and, as a result, cools the inner walls of the burner.