Method and device for the combustion of fuel

Abstract

A method and device for the combustion of fuel in a fuel chamber resulting in combustion which is particularly low in nitrogen, wherein fuel and combustion air are mixed before entering the combustion chamber avoiding self-ignition; a first part of the mixture is introduced into the combustion chamber such that it circulates inside the combustion chamber; other fuel is added to the circulatory flow of the first part of the mixture until it is heated up to ignition conditions; and at least one second part of the mixture is introduced into the combustion chamber in such a way that is mixed with hot combustion gas from the circulatory flow, heated up and combusted until it leaves the combustion chamber.

1 - 21 . (canceled)  
     
     
         22 . A method for a combustion of a fuel in a combustion chamber, comprising: 
 mixing the fuel and a combustion air before entry into the combustion chamber;    discharging a first portion of the mixture into the combustion chamber such that the first portion circulates in the combustion chamber;    adding a further fuel to the circulating mixture until the circulating mixture ignites; and    injecting a second portion of the mixture into the combustion chamber generally perpendicular to a direction of a hot combustion gas flowing away from the circulating mixture such that the second portion mixes with the hot combustion gas and combusts prior to exiting from the combustion chamber.    
     
     
         23 . The method as claimed in  claim 22 , wherein a ratio of the combustion air to the fuel mixed before entry into the combustion chamber is higher than a ratio of the combustion air to the fuel after adding the further fuel in the combustion chamber.  
     
     
         24 . The method as claimed in  claim 22 , wherein the first and second portions are discharged into the combustion chamber via a body arranged centrally in the combustion chamber.  
     
     
         25 . The method as claimed in  claim 22 , wherein the fuel is a gas or liquid fuel.  
     
     
         26 . The method as claimed in  claim 22 , wherein the circulating mixture circulates in a peripheral region of the combustion chamber.  
     
     
         27 . The method as claimed in  claim 22 , wherein the combustion chamber is cylindrical or annular in shape.  
     
     
         28 . The method as claimed in  claim 22 , wherein the first and second portions are discharged into the combustion chamber in an radial manner via physically separated nozzles and as a common stream which is divided within the combustion chamber.  
     
     
         29 . The method as claimed in  claim 22 , wherein the further fuel is discharged into the combustion chamber in an axial manner.  
     
     
         30 . The method as claimed in  claim 22 , wherein between 5% to 25% of a total gas mass of the combined fuel and combustion air is supplied to circulating mixture at a time.  
     
     
         31 . The method as claimed in  claim 22 , wherein between 10% to 20% of a total gas mass of the combined fuel and combustion air is supplied to circulating mixture at a time.  
     
     
         32 . A device for a combustion of a fuel in a combustion chamber, comprising: 
 a mixer that mixes the fuel and a combustion air before entry into the combustion chamber;    a first discharger that discharges a first portion of the mixture into the combustion chamber such that the first portion circulates in the combustion chamber;    a passageway that supplies a further fuel into the circulating mixture of the first portion until the circulating mixture ignites; and    a second discharger that discharges a second portion of the mixture into the combustion chamber generally perpendicular to a direction of a hot combustion gas flowing away from the circulating mixture such that the second portion mixes with the hot combustion gas and combusts prior to exiting from the combustion chamber.    
     
     
         33 . The device as claimed in  claim 32 , wherein the first and second portions are discharged into the combustion chamber via a body arranged centrally in the combustion chamber.  
     
     
         34 . The device as claimed in  claim 32 , wherein the fuel is a gas or liquid fuel.  
     
     
         35 . The device as claimed in  claim 32 , wherein the circulating mixture circulates in a peripheral region of the combustion chamber.  
     
     
         36 . The device as claimed in  claim 32 , wherein the combustion chamber is cylindrical or annular in shape.  
     
     
         37 . The device as claimed in  claim 32 , wherein the first and second portions are discharged into the combustion chamber in an radial manner via physically separated nozzles and as a common stream which is divided within the combustion chamber.  
     
     
         38 . The device as claimed in  claim 32 , wherein the further fuel is discharged into the combustion chamber in an axial manner.  
     
     
         39 . The device as claimed in  claim 32 , wherein between 5% to 25% of a total gas mass of the combined fuel and combustion air is supplied to circulating mixture at a time.  
     
     
         40 . The device as claimed in  claim 32 , wherein between 10% to 20% of a total gas mass of the combined fuel and combustion air is supplied to circulating mixture at a time.