KR-20260064561-A - AMMONIA COMBUTSTION BURNER

KR20260064561AKR 20260064561 AKR20260064561 AKR 20260064561AKR-20260064561-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 for supplying ammonia to the combustion furnace; and an air supply unit for supplying air to the combustion furnace and the auxiliary fuel supply pipe; wherein the auxiliary fuel supply pipe may be provided with an auxiliary fuel communication hole that communicates the internal space of the auxiliary fuel supply pipe with the internal space 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 (8)

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 auxiliary fuel supply pipe; The above auxiliary fuel supply pipe is provided with an auxiliary fuel communication hole that connects the internal space of the above auxiliary fuel supply pipe with the internal space of the above ammonia supply pipe. Ammonia combustion burner.
In Article 1, Ammonia storage tank for supplying ammonia to the ammonia supply pipe; further comprising, A portion of the ammonia supplied from the ammonia storage tank to the ammonia supply pipe is supplied to the auxiliary fuel supply pipe through the auxiliary fuel flue hole. Ammonia combustion burner.
In Article 1, The above auxiliary fuel supply pipe is, An auxiliary fuel supply pipe member connected to the above air supply unit and equipped with the above auxiliary fuel communication hole; and An auxiliary fuel supply nozzle connected to one end of the auxiliary fuel supply pipe member and having a nozzle hole; comprising Ammonia combustion burner.
In Article 1, The above auxiliary fuel is formed by mixing air supplied from the air supply unit and ammonia supplied from 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 an ammonia nozzle hole; comprising Ammonia combustion burner.
In Article 1, A pilot burner provided on the outer side of the above ammonia supply pipe and for burning mixed fuel; and A mixer that supplies the mixed fuel to the pilot burner; further comprising Ammonia combustion burner.
In Article 6, An ammonia storage tank that supplies ammonia to the above mixer; and It further includes a pilot air supply unit that supplies air to the above-mentioned mixer, and The above mixed fuel is formed by mixing ammonia supplied from the ammonia storage tank with air supplied through the pilot air supply unit. ammonia combustion burner
In Article 1, The above air supply unit 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