Non-rotational stabilization of the flame of a premixing burner

Abstract

A method for stabilizing the flame of a premixing burner, comprising a reaction chamber containing a fluid is provided. The method includes injecting an air-fuel mixture into the reaction chamber at a speed that is different from that of the fluid present in the reaction chamber, adjusting the speed such that vortices form at the boundary between the air-fuel mixture and the surrounding fluid. A premixing burner including a reaction chamber and at least one premixing spray nozzle opening into the reaction chamber is also provided. The premixing burner injects an air-fuel mixture into the reaction chamber at a speed that is different from that of the surrounding fluid, the speed being adjusted such that vortices from at the boundary between the air-fuel mixture and the surrounding fluid.

1 .- 23 . (canceled) 
   
   
       24 . A method for stabilizing the flame of a premixing burner including a reaction chamber containing a fluid, comprising:
 injecting an air/fuel mixture into the reaction chamber at a first speed that is different from a second speed of the fluid present in the reaction chamber wherein the air/fuel mixture injected into the reaction chamber is in a form of an unswirled spray;   setting the first speed such that a plurality of vortices form at an interface forming between the air/fuel mixture and the fluid surrounding the air/fuel mixture, the plurality of vortices faun due to a set speed difference between a mixture present in the reaction chamber and the air/fuel mixture; and   injecting a fuel or the air/fuel mixture into the reaction chamber as a pilot fuel using a pilot burner, the pilot fuel is injected into the reaction chamber with a parallel or an anti-parallel offset from the air/fuel mixture.   
   
   
       25 . The method as claimed in  claim 24 , wherein a plurality of axes of the plurality of forming vortices are perpendicular to a propagation direction of the air/fuel mixture. 
   
   
       26 . The method as claimed in  claim 24 , wherein the air/fuel mixture is formed by injecting the fuel into an oxidation means in a premixing spray nozzle at a third speed that is higher than a fourth speed of the oxidation means. 
   
   
       27 . The method as claimed in  claim 26 , wherein the fuel is injected into the oxidation means parallel to a flow direction of the oxidation means. 
   
   
       28 . The method as claimed in  claim 24 , wherein a side of the reaction chamber where the pilot burner is located is cooled using the oxidation means which is then fed to the pilot fuel during injection into the reaction chamber. 
   
   
       29 . The method as claimed in  claim 26 , wherein the oxidation means is air. 
   
   
       30 . A premixing burner, comprising:
 a reaction chamber;   a premixing spray nozzle opening into the reaction chamber; and   a pilot burner,   wherein an air/fuel mixture may be injected into the reaction chamber at a first speed that is different from a second speed of a fluid surrounding the air/fuel mixture,   wherein the first speed is set such that a plurality of vortices form at an interface forming between the air/fuel mixture and the fluid,   wherein the plurality of vortices form due to a set speed difference between a mixture present in the reaction chamber and the injected air/fuel mixture, and   wherein the pilot burner injects a fuel or the air-fuel mixture into the reaction chamber with a parallel or an anti-parallel offset from the air/fuel mixture.   
   
   
       31 . The premixing burner as claimed in  claim 30 , wherein the premixing spray nozzle includes a fuel nozzle. 
   
   
       32 . The premixing burner as claimed in  claim 31 , wherein the premixing spray nozzle injects the fuel into an oxidation means through the fuel nozzle parallel to a flow direction of the oxidation means located in the premixing spray nozzle. 
   
   
       33 . The premixing burner as claimed in  claim 31 , wherein the fuel nozzle includes a first inlet opening, which allows injection of the fuel at a first angle between 0° and 90° to the flow direction of the oxidation means located in the premixing spray nozzle. 
   
   
       34 . The premixing burner as claimed in  claim 30 , wherein a second inlet opening of the premixing spray nozzle opening into the reaction chamber is round, oval, rectangular, or square or is embodied as a slot, and/or an opening of the fuel nozzle opening into the premixing spray nozzle is round, oval, rectangular or square or is embodied as a slot. 
   
   
       35 . The premixing burner as claimed in  claim 30 , wherein the premixing spray nozzle includes an element for setting an entry speed of the oxidation means. 
   
   
       36 . The premixing burner as claimed in  claim 35 , wherein the element is a valve or a perforated sheet. 
   
   
       37 . The premixing burner as claimed in  claim 30 , wherein the pilot burner is a rotationally stabilized burner or a spray burner. 
   
   
       38 . The premixing burner as claimed in  claim 37 , wherein a plurality of premixing spray nozzles are disposed to form a ring or a plurality of concentric rings around the pilot burner. 
   
   
       39 . The premixing burner as claimed in  claim 38 ,
 wherein the plurality of premixing spray nozzles are disposed to form a plurality of concentric rings around the pilot burner, and   wherein the plurality of premixing spray nozzles of the various rings are disposed with an offset from one another.   
   
   
       40 . The premixing burner as claimed in  claim 30 , wherein the plurality of premixing spray nozzles are disposed in a row. 
   
   
       41 . The premixing burner as claimed in  claim 30 , wherein the incident spray directions of the plurality of premixing spray nozzles are at a second angle between 0° and 90° to one another in the reaction chamber. 
   
   
       42 . The premixing burner as claimed in  claim 30 , wherein a pilot burner is disposed between two premixing spray nozzles. 
   
   
       43 . The premixing burner as claimed in  claim 30 ,
 wherein the premixing spray nozzle is disposed opposite the pilot burner, and   wherein the premixing spray nozzle includes a radial offset from the pilot burner.   
   
   
       44 . The premixing burner as claimed in  claim 30 , wherein the premixing burner is surrounded by a fluid channel, the fluid channel is connected to a cooling fluid inlet. 
   
   
       45 . The premixing burner as claimed in  claim 44 , wherein the cooling fluid inlet is an air inlet.