KR-20260064560-A - AMMONIA COMBUTSTION BURNER

KR20260064560AKR 20260064560 AKR20260064560 AKR 20260064560AKR-20260064560-A

Abstract

An ammonia combustion burner according to one embodiment of the present invention comprises: an auxiliary fuel supply pipe for supplying auxiliary fuel to a combustion furnace; an ammonia supply pipe disposed on the outside of the auxiliary fuel supply pipe and supplying ammonia to the combustion furnace; and an air supply unit for supplying air to the combustion furnace; wherein the ammonia supply pipe includes a plurality of ammonia nozzle holes, and some of the plurality of ammonia nozzle holes may have their centerlines intersecting on the radially outer side of the ammonia supply pipe.

Inventors

김규종
이경래
김범종
김동원
이규화
박지훈
박경일
이종민

Assignees

현대중공업파워시스템 주식회사
한국전력공사

Dates

Publication Date: 20260507
Application Date: 20251024
Priority Date: 20241031

Claims (12)

An auxiliary fuel supply pipe that supplies auxiliary fuel to the combustion furnace; An ammonia supply pipe disposed on the outside of the above auxiliary fuel supply pipe and supplying ammonia to the combustion furnace; and It includes an air supply unit that supplies air to the combustion furnace; and The above ammonia supply pipe includes a plurality of ammonia nozzle holes, and some of the plurality of ammonia nozzle holes have centerlines that intersect at the radial outer side of the ammonia supply pipe. Ammonia combustion burner.
In Article 1, The above ammonia supply pipe is, Ammonia supply pipe member into which ammonia is introduced; and an ammonia supply nozzle provided at one end of the ammonia supply pipe member and having the ammonia nozzle hole; comprising Ammonia combustion burner.
In Article 2, The above ammonia nozzle hole is, A first nozzle hole having a first centerline; A second nozzle hole having a second centerline inclined axially outward from the first nozzle hole; A third nozzle hole positioned axially outward from the second nozzle hole and having a third centerline inclined axially outward; and It includes a fourth nozzle hole having a fourth centerline positioned axially outward from the third nozzle hole and inclined axially outward; At least two of the first centerline, the second centerline, the third centerline, and the fourth centerline are provided to intersect at the radially outer side of the ammonia supply nozzle, ammonia combustion burner
In Paragraph 3, The above first centerline is provided parallel to the radial direction of the ammonia supply nozzle, Ammonia combustion burner.
In Paragraph 3, The above-mentioned fourth centerline is provided such that the spacing between the above-mentioned second centerline and the above-mentioned third centerline increases as it extends radially outward from the ammonia supply pipe member. ammonia combustion burner
In Paragraph 3, The above ammonia nozzle hole is, A fifth nozzle hole having a fifth centerline positioned axially outward from the fourth nozzle hole and inclined axially outward; and A sixth nozzle hole branching from the fifth nozzle hole and having a sixth centerline parallel to the axial direction of the ammonia supply nozzle; further comprising Ammonia combustion burner.
In Article 1, At one end of the air supply unit, a first swirler is provided to form a vortex in the air supplied to the combustion furnace, and The interior of the air supply unit is equipped with a booster swirler that forms a vortex in the air introduced into the air supply unit. Ammonia combustion burner.
In Article 7, The above-mentioned ammonia supply pipe further includes a pilot burner on the outside thereof for supplying and burning mixed fuel inside the combustion chamber. Ammonia combustion burner.
In Article 8, The above pilot burner is provided to overlap circumferentially with the first swirler and the booster swirler, Ammonia combustion burner.
In Article 8, The above pilot burner is The pilot burner is provided on the radially outer side of the first swirler and the booster swirler. Ammonia combustion burner.
In Article 1, It further includes a pre-mixing pipe disposed on the outside of the ammonia supply pipe and connected to the ammonia supply pipe, through which a portion of the ammonia introduced into the ammonia supply pipe is introduced. The above air supply unit supplies air to the above pre-mixing pipe, and the ammonia and air introduced into the above pre-mixing pipe are mixed and supplied to the above combustion furnace. Ammonia combustion burner.
In Article 11, The above ammonia supply pipe is provided with a communication hole that connects the internal space of the above ammonia supply pipe with the internal space of the above premixing pipe, Ammonia combustion burner.

Description

Ammonia Combustion Burner The present invention relates to an ammonia combustion burner, and more specifically, to an ammonia combustion burner capable of improving flame stability and reducing nitrogen oxide emissions. In response to intensifying global warming, countries and major corporations worldwide are actively pursuing ESG (Environmental, Social, and Governance) policies; consequently, decarbonization policies are expected to be intensively researched and put into practical use. However, given the domestic energy conditions characterized by a shortage of renewable energy sources, it is difficult to secure large quantities of green hydrogen domestically. Accordingly, importing and utilizing green hydrogen produced from overseas renewable energy sources is being considered as a key direction for energy policy. However, hydrogen has characteristics that make it unfavorable for long-distance mass transport due to its low density and low liquefaction temperature. To overcome these limitations, technologies are being proposed to transport produced hydrogen by converting it into stable carrier compounds. Among them, ammonia is advantageous for long-distance transportation due to its high hydrogen content and high liquefaction temperature, so technologies utilizing ammonia are being developed. However, ammonia has a problem with low combustibility due to its high latent heat and low flame propagation speed. For example, it has a flame propagation speed about one-fifth that of LNG; therefore, if ammonia is injected into an existing LNG burner, flame ignition does not occur or the flame easily blows away, making stable combustion impossible. Consequently, to use ammonia in existing power generation facilities, improvements to the burner structure are required to ensure flame stabilization and complete combustion. Meanwhile, since ammonia is composed of hydrogen and nitrogen, it tends to generate a large amount of NOx during combustion. Therefore, an ammonia combustion burner capable of maintaining low nitrogen oxide emissions is required. FIG. 1 is a schematic cross-sectional view of an ammonia combustion burner according to one embodiment of the present invention. FIG. 2 is a front view showing the combustion furnace side end of an ammonia combustion burner according to one embodiment of the present invention. Figure 3 is an enlarged view of section A of Figure 1. FIG. 4 is a cross-sectional view illustrating a first modified example of a pre-mixing tube according to one embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating a second modified example of a pre-mixing tube according to one embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating a third modified example of a pre-mixing tube according to one embodiment of the present invention. FIG. 7 is a schematic rear view showing the end of the pre-mixing tube shown in FIG. 6, equipped with an air inlet hole. FIG. 8 is a partial cross-sectional view illustrating a first modified example of an ammonia supply pipe in an ammonia combustion burner according to one embodiment of the present invention. FIG. 9 is a partial cross-sectional view illustrating a second modified example of an ammonia supply pipe in an ammonia combustion burner according to one embodiment of the present invention. FIG. 10 is a partial cross-sectional view illustrating a first modified example of an ammonia supply pipe and an air supply part in an ammonia combustion burner according to one embodiment of the present invention. FIG. 11 is a partial cross-sectional view illustrating a first modified example of an ammonia supply pipe, an air supply unit, and a pilot burner in an ammonia combustion burner according to one embodiment of the present invention. FIG. 12 is a partial cross-sectional view illustrating a second modified example of an ammonia supply pipe, an air supply unit, and a pilot burner in an ammonia combustion burner according to one embodiment of the present invention. FIG. 13 is a schematic cross-sectional view of an ammonia combustion burner according to another embodiment of the present invention. FIG. 14 is a schematic partial cross-sectional perspective view of an ammonia combustion burner according to another embodiment of the present invention. FIG. 15 is a schematic cross-sectional view of an ammonia combustion burner according to another embodiment of the present invention. FIG. 16 is a schematic cross-sectional view of an ammonia combustion burner according to another embodiment of the present invention. FIG. 17 is a schematic cross-sectional view of an ammonia combustion burner according to another embodiment of the present invention. FIG. 18 is a schematic cross-sectional view of an ammonia combustion burner according to another embodiment of the present invention. FIG. 19 is a schematic cross-sectional view of an ammonia combustion burner according to another embodiment of the present invention. The disclosed