Burner and combustion device comprising said burner

Abstract

The burner ( 1 ) according to the invention comprises a main body ( 10 ) provided with an operating cavity ( 11 ) open at least on a first side. The burner also comprises first feed means ( 20 ) arranged to introduce a flow of a first reagent (for example combustion air) into said cavity and second feed means ( 31 ) are arranged to introduce a flow of a second reagent (for example fuel) into the same operating cavity. The first means are configured so as to introduce the first reagent according to a tangential direction, while the second means are configured to introduce the second reagent according to a direction parallel to the direction in which the cavity extends. According to the invention the operating cavity comprises a first portion between the intake position of the first reagent and the intake position of the second reagent. This first portion defines a stabilization chamber of the flow of the first reagent. The operating cavity also comprises a second portion defining a combustion chamber downstream of the intake position of the second reagent.

1 . A burner for producing a combustion device, said burner comprising:
 a main body comprising a substantially cylindrically shaped operating cavity which extends along an axial direction, said operating cavity being open at least on a first side,   first feed means to introduce a flow of a first reagent into said operating cavity in an intake position of said first reagent, said first feed means configuring a tangential intake of said first reagent in said operating cavity;   second feed means to introduce a flow of a second reagent into said operating cavity in an intake position of said second flow, said second feed means introducing said flow of second reagent according to a direction substantially parallel to said axial direction along which said operating cavity extends,   wherein said operating cavity comprises a first portion between said intake position of said first reagent and said intake position of said second reagent, said first portion defining a stabilization chamber of the motion of said first reagent, said operating cavity comprising a second portion defining a combustion chamber downstream of said intake position of said second reagent.   
     
     
         2 . The burner according to  claim 1 , wherein said burner comprises combustion ignition means positioned inside said operating cavity. 
     
     
         3 . The burner according to  claim 1 , wherein said first reagent is an oxidizer and wherein said second reagent is a fuel. 
     
     
         4 . The burner according to  claim 3 , wherein said first reagent is combustion air and wherein said second reagent is liquid or gaseous fuel. 
     
     
         5 . The burner according to  claim 1 , wherein said first reagent is a fuel and wherein said second reagent is an oxidizer. 
     
     
         6 . The burner according to  claim 1 , wherein said first portion and said second operating portion have the same diametric dimension. 
     
     
         7 . The burner according to  claim 1 , wherein said intake position of combustible air is substantially adjacent to said housing wall which delimits said operating cavity. 
     
     
         8 . The burner according to  claim 1 , wherein the ratio between the length of said first portion and the length of said second portion falls within an interval between 0.1 and 2. 
     
     
         9 . The burner according to  claims 2 , wherein said first feed means comprise a feed duct connected to said main body, said feed duct being in communication on one side with a source of combustion air and on the other with said operating cavity. 
     
     
         10 . The burner according to  claim 1 , wherein said second feed means comprise a lance for fuel intake which extends through said housing wall of said main body, said lance comprising a portion outside said main body and in communication with a source of fuel and a portion inside said main body and coaxial with said operating cavity. 
     
     
         11 . The burner according to  claim 10 , wherein said fuel ignition means are arranged inside said lance for fuel intake. 
     
     
         12 . The burner according to  claims 1 , wherein said main body is formed by a tubular element made of metal material. 
     
     
         13 . A combustion device, comprising a burner, said burner comprising:
 a main body comprising a substantially cylindrically shaped operating cavity which extends along an axial direction, said operating cavity being open at least on a first side,   first feed means to introduce a flow of a first reagent into said operating cavity in an intake position of said first reagent, said first feed means configuring a tangential intake of said first reagent in said operating cavity; and   second feed means to introduce a flow of a second reagent into said operating cavity in an intake position of said second flow, said second feed means introducing said flow of second reagent according to a direction substantially parallel to said axial direction along which said operating cavity extends,   
       wherein said operating cavity comprises a first portion between said intake position of said first reagent and said intake position of said second reagent, said first portion defining a stabilization chamber of the motion of said first reagent, said operating cavity comprising a second portion defining a combustion chamber downstream of said intake position of said second reagent. 
     
     
         14 . The combustion device according to  claim 13 , wherein said device comprises a first combustion stage produced through said burner and a second combustion stage defined by a further combustion chamber into which the combustion products produced by said burner flow, said device comprising further feed means to introduce combustion air into said further combustion chamber. 
     
     
         15 . The combustion device according to  claim 14  wherein said further combustion chamber is defined by a housing liner, inside which at least part of said main body of said burner is positioned, said housing liner having a substantially cylindrical shape and extending longitudinally between a first wall and a second wall opposite the first, said burner being positioned, through said first wall, so that said operating cavity of said main body is substantially coaxial with said housing liner. 
     
     
         16 . The combustion device according to  claim 15 , wherein said first wall of said housing liner comprises a discharge opening to discharge the products deriving from said second combustion. 
     
     
         17 . The combustion device according to  claim 16 , wherein said discharge opening is coaxial with said housing liner, said device comprising a conveying element to convey the combustion products delivered through said discharge opening.