| 摘要 |
The present invention relates to a low nitrogen oxide combustion device, capable of reducing nitrogen oxide by reacting to fuel at multiple stages and recirculating generated combustion gas, and moreover, miniaturizing the combustion device by forming a multistage reaction with a relatively simple composition. According to an embodiment of the present invention, the low nitrogen oxide combustion device includes: a primary fuel spray body spraying and supplying primary fuel into a combustion furnace; and a secondary fuel spray body placed inside the first fuel spray body, and spraying and supplying secondary fuel into the combustion furnace. The spray speed of the secondary fuel is faster than the spray speed of the primary fuel. Therefore, low NOx performance is kept by keeping advantages of the existing low NOx combustor such as the internal recirculation of combustion gas and the division of fuel thickness/thinness areas, the low NOx is possibly formed without an extra re-combustion system, and operation in a small and medium industrial boiler with a compact combustion chamber is possible without any problem. Moreover, a relatively simple structure, as compared to other low NOx combustors, secures economic feasibility for manufacture, therefore, operation in the small and medium industrial boiler with the compact combustion chamber is possible without any problem. |
