KR-20260064564-A - AMMONIA COMBUTSTION BURNER

KR20260064564AKR 20260064564 AKR20260064564 AKR 20260064564AKR-20260064564-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 intermediate pipe disposed outside the auxiliary fuel supply pipe and supplying a first mixed fuel to the combustion furnace; an ammonia supply pipe disposed outside the intermediate pipe and supplying ammonia to the combustion furnace; and a pilot burner provided outside the ammonia supply pipe and combusting a second mixed fuel, wherein a portion of the ammonia supplied from the ammonia supply pipe to the combustion furnace may be supplied toward the pilot burner.

Inventors

김규종
이경래
김범종
김동원
이규화
박지훈
박경일
이종민

Assignees

현대중공업파워시스템 주식회사
한국전력공사

Dates

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

Claims (8)

An auxiliary fuel supply pipe that supplies auxiliary fuel to the combustion furnace; An intermediate pipe positioned on the outside of the above auxiliary fuel supply pipe and supplying a first mixed fuel to the combustion furnace; An ammonia supply pipe disposed on the outer side of the above intermediate pipe and supplying ammonia to the combustion furnace; and A pilot burner provided on the outer side of the ammonia supply pipe and burning a second mixed fuel; comprising A portion of the ammonia supplied from the ammonia supply pipe to the combustion furnace is supplied toward the pilot burner. Ammonia combustion burner.
In Article 1, The above ammonia supply pipe Ammonia supply pipe member receiving ammonia; and an ammonia supply nozzle provided on one side of the ammonia supply pipe member and supplying ammonia supplied to the ammonia supply pipe member to the combustion furnace; comprising Ammonia combustion burner.
In Article 2, The above ammonia supply nozzle includes a plurality of ammonia nozzle holes, and some of the plurality of ammonia nozzle holes are formed such that their centerlines are inclined toward the radial inner side of the ammonia supply pipe. Ammonia combustion burner.
In Article 1, The above intermediate pipe is equipped with an intermediate swirler that forms a vortex in the air and first mixed fuel supplied to the combustion furnace through the above intermediate pipe, Ammonia combustion burner.
In Article 1, A first mixer that supplies the first mixed fuel to the intermediate pipe; and A second mixer that supplies the second mixed fuel to the pilot burner; further comprising Ammonia combustion burner.
In Article 5, An ammonia storage tank that supplies ammonia to the ammonia supply pipe and the first mixer; An auxiliary fuel storage tank that supplies auxiliary fuel to the auxiliary fuel supply pipe and the second mixer; An air supply unit that supplies air to the first mixer and the combustion furnace; and A pilot air supply unit that supplies air to the second mixer; further comprising Ammonia combustion burner.
In Article 6, The first mixed fuel is formed by mixing ammonia supplied from the ammonia storage tank and air supplied from the air supply unit, and The second mixed fuel is formed by mixing the auxiliary fuel supplied from the auxiliary fuel storage tank and the air supplied from the pilot air supply unit. Ammonia combustion burner.
In Article 6, The above air supply unit is provided on the outside of the ammonia supply pipe and includes a first swirler that forms a vortex in the air supplied to the combustion furnace. 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 the problem of 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 existing LNG burners, 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 e