Combustion apparatus

Abstract

There is provided a combustion apparatus for reducing generation of NOx by securing more time for mixing fuel and air and uniformly mixing fuel and air. The combustion apparatus includes: a modifying part configured in the center to modify supplied hydrocarbon-based fuel and air and discharge high temperature modified gas including hydrogen to an outlet; and a supply part configured at an outer side of the outlet to jet fuel and air to one side of the modified gas discharged from the modifying part to form a flame at a position spaced apart by a pre-set distance from the outlet.

What is claimed is: 
     
         1 . A combustion apparatus comprising:
 a modifying part configured in the center to modify supplied hydrocarbon-based fuel and air and discharge high temperature modified gas including hydrogen to an outlet; and   a supply part configured at an outer side of the outlet to jet fuel and air to one side of the modified gas discharged from the modifying part to form a flame at a position spaced apart by a pre-set distance from the outlet.   
     
     
         2 . The combustion apparatus of  claim 1 , wherein an equivalence ratio of hydrocarbon-based fuel in the mixture of fuel and air supplied to the modifying part ranges from a stoichiometric ratio of partial oxidation to a stoichiometric ratio of combustion. 
     
     
         3 . The combustion apparatus of  claim 1 , wherein the modifying part comprises:
 a first housing electrically earthed; and   an electrode separately installed in the center within the first housing and receiving a voltage applied thereto.   
     
     
         4 . The combustion apparatus of  claim 3 , wherein the first housing comprises:
 a discharge region forming a discharge gap with the electrode therebetween to allow fuel and air to react under a partial oxidation condition; and   an expanded region expanded from the discharge region to stabilize gas discharged after being reacted in the discharge region.   
     
     
         5 . The combustion apparatus of  claim 3 , wherein the supply part is formed to jet fuel and air to an outer side of the modified gas discharged from the modifying part. 
     
     
         6 . The combustion apparatus of  claim 5 , wherein the supply part comprises
 a second housing separately disposed on an outer circumference of the first housing; and   a third housing separately disposed on an outer circumference of the second housing, and   further comprises:   a fuel passage formed between the first housing and the second housing; and   an air passage formed between the second housing and the third housing.   
     
     
         7 . The combustion apparatus of  claim 6 , wherein the air passage is connected to the discharge region across the fuel passage by a passage connection member connecting the second housing and the first housing. 
     
     
         8 . The combustion apparatus of  claim 6 , wherein the second housing has a side wall formed at one side of the fuel passage, and the first housing is connected to the side wall through a method such as screw-connection or welding. 
     
     
         9 . The combustion apparatus of  claim 8 , wherein the first housing further comprises a coupling portion protruded toward the side wall of the second housing,
 the fuel passage comprises   an inflow side formed at the center of one side of the first housing and   a supply side connected to the outer circumference of the first housing, and   the coupling portion comprises a through hole connecting the inflow side and the supply side.   
     
     
         10 . The combustion apparatus of  claim 9 , wherein an end portion of the first housing includes a flange formed to be protruded to an outer side in a diameter direction of the second housing such that a space is formed with an end portion of the second housing in a length direction of the second housing in the opposite side of the side wall of the second housing, and
 the space set between the flange and the end portion of the second housing allows the supply side of the fuel passage to open to the outside in the diameter direction of the second housing.   
     
     
         11 . The combustion apparatus of  claim 10 , wherein the end portion of the second housing and an end portion of the third housing are disposed in the same line in the diameter direction. 
     
     
         12 . The combustion apparatus of  claim 3 , wherein the first housing comprises:
 an inner member forming an air nozzle jetting air toward the electrode; and   an outer member coupled to an outer circumference of the inner member and accommodating air to be jetted through the air nozzle upon receiving it.   
     
     
         13 . The combustion apparatus of  claim 12 , wherein a plurality of air nozzles are disposed to be spaced apart from each other in a circumferential direction in the inner member, and have an angle sloped with respect to a diameter direction of the inner member. 
     
     
         14 . The combustion apparatus of  claim 3 , wherein the supply part is formed to jet fuel and air in a direction parallel to the direction in which the modified gas is discharged from an outer side of the modified gas discharged from the modifying part. 
     
     
         15 . The combustion apparatus of  claim 12 , wherein the supply part comprises:
 a second housing separately disposed on an outer circumference of the first housing and   a third housing separately disposed on an outer circumference of the second housing, and   further comprises:   a fuel passage formed between the first housing and the second housing and   an air passage formed between the second housing and the third housing, and   an end portion of the first housing includes a flange disposed at an inner side of an end portion of the second housing and protruded inwardly in a diameter direction of the first housing.   
     
     
         16 . The combustion apparatus of  claim 15 , wherein
 the end portion of the first housing and the end portion of the second housing are formed to be parallel to each other, and   a first swirler is installed between the end portion of the first housing and the end portion of the second housing and   a second swirler is installed between the end portion of the second housing and the end portion of the third housing.