Burner nozzle field comprising integrated heat exchangers

Abstract

The invention relates to a novel burner nozzle field consisting of nozzle field modules which work with an intensive air pre-heating system and which produce gas impact spots on the material which is to be warmed, which have an average distance of, preferably, less than 150 mm and, in the best case, less than 100 mm. The burners work with a deignited gas outlet and an individual air pre-heating system. The individual nozzle field modules can work in any particular spatial orientation. Burner nozzle fields can be arranged behind each other in order to increase efficiency.

1 . A burner nozzle field, particularly for heating moving goods to be heated, comprising: 
 A number of nozzle bodies ( 27 ), each including an individual air pre-heating structure ( 22 ,  45 ) and each of said nozzle bodies ( 27 ) having at least one nozzle opening for generating fuel air jets ( 32 ) which are directed toward the goods to be heated, but are not ignited at the point of discharge from the respective nozzle opening so as to form an un-ignited fuel-air jet ( 32 ), said nozzle bodies ( 27 ) are arranged in spaced relationship that the distance between the centers of the impact spots on the good to be heated is less than 200 mm, and wherein the nozzle openings of the nozzle bodies ( 27 ) are disposed at a distance from the combustion chamber wall ( 5 ) so as to provide for a recirculation volume between the nozzle opening and the combustion chamber wall ( 5 ), wherein the air pre-heating arrangement ( 22 ,  45 ) is so designed that it heats the air supplied to the nozzle bodies to above 500° C., and wherein the discharge speed of the fuel air jet ( 32 ) which leaves the nozzle opening in an un-ignited state is at least 50 m/s.    
   
   
       2 . A burner nozzle field according to  claim 1 , wherein in each case, air nozzle body ( 27 ) is combined with one air preheating arrangement ( 22 ,  45 ) to form a burner ( 15 ) which forms a design unit and wherein several such burners ( 11  to  15 ) are combined to form a nozzle field module ( 42 ).  
   
   
       3 . A burner nozzle field according to  claim 2 , wherein each nozzle field module ( 42 ) includes an exhaust gas collection box ( 26 ) an air supply line ( 25 ) and a fuel supply line ( 36 ).  
   
   
       4 . A burner nozzle field according to  claim 3 , wherein the individual burners ( 11  to  15 ) of the nozzle field module ( 42 ) extend from the exhaust gas collection box ( 26 ) and from the air supply line ( 25 ) at a right angle.  
   
   
       5 . A burner nozzle field according to  claim 1 , wherein the discharge speed of the still unburned fuel/air jet ( 32 ) out of the nozzle opening is at least 100 m/s.  
   
   
       6 . A burner nozzle field according to  claim 1 , wherein the nozzle openings of the nozzle body ( 27 ) for forming the recirculation space are disposed at a distance of at least 50 mm from the combustion chamber wall ( 5 ) and preferably at least 100 mm.  
   
   
       7 . A burner nozzle field according to  claim 1 , wherein each nozzle body ( 27 ) has several nozzle openings whose discharge directions define a cone.  
   
   
       8 . A burner nozzle field according to  claim 1 , wherein the nozzle body ( 27 ) consists of a ceramic material.  
   
   
       9 . A burner nozzle field according to  claim 1 , wherein a fuel/air mixture with excess air is supplied to said at least one nozzle opening.  
   
   
       10 . A burner nozzle field according to  claim 1 , wherein exhaust gas is supplied which is admixed to the air and/or the fuel to said at least one nozzle opening.  
   
   
       11 . A burner nozzle field according to  claim 1 , wherein a stoichiometric fuel/air mixture is supplied to said at least one nozzle opening.  
   
   
       12 . A burner nozzle field according to  claim 1 , wherein the burner nozzle field includes a heat-up burner ( 43 ).  
   
   
       13 . A burner nozzle field according to  claim 1 , wherein the distance between the nozzle opening and the good to be heated is less than 200 mm.  
   
   
       14 . A burner nozzle field according to  claim 1 , wherein the burner nozzle field is provided with a removal arrangement for the removal of the heated good ( 2 ).  
   
   
       15 . A burner nozzle field according to  claim 1 , wherein the burner nozzle field is arranged below the good ( 2 ) to be heated.  
   
   
       16 . A burner nozzle field according to  claim 1 , wherein the good ( 2 ) to be heated is supported by the gas cushion formed by the fuel/air jet discharged from the nozzle openings.  
   
   
       17 . A burner nozzle field according to  claim 1 , wherein the nozzle bodies ( 27 ) are arranged in rows which are inclined with respect to the transport direction of the good to be heated.  
   
   
       18 . A burner nozzle field according to  claim 1 , wherein two burner nozzle field modules ( 42 ) are arranged opposite each other.  
   
   
       19 . A burner nozzle field according to  claim 2 , wherein nozzle field module ( 42 ) includes a plurality of pairs of burners ( 11   a ,  11   b  to  15   a ,  15   b ), said pairs of burners are in air communication with said air distribution frame ( 25 ), said air distribution frame ( 25 ) includes two half sections ( 25   a ), ( 25   b ), half section ( 25   a ) is in communication with said burners ( 11   a  to  15   a ) indexed with ‘a’ and half section ( 25   b ) is in communication with burners ( 11   b  to  15   b ) indexed with ‘b’.  
   
   
       20 . A burner nozzle field according to  claim 19 , further including a switch over device ( 51 ) connected to said half sections ( 25   a ), ( 25   b ), said switch over device ( 51 ) for alternately providing air exhaust or air feed to said half sections ( 25   a ), ( 25   b ), whereby said burners indexed with ‘a’ and said burners indexed with ‘b’ alternate between actuated burner and recuperative regenerative heat transfer by operation of switchover device ( 51 ).