KR-20260064559-A - AMMONIA COMBUTSTION BURNER

KR20260064559AKR 20260064559 AKR20260064559 AKR 20260064559AKR-20260064559-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; a pre-mixing pipe disposed on the outside of the ammonia supply pipe and connected to the ammonia supply pipe to receive a portion of the ammonia introduced into the ammonia supply pipe; and an air supply unit equipped with a first swirler that supplies air to the combustion furnace and the pre-mixing pipe and forms a vortex in the air supplied to the combustion furnace; wherein the ammonia and air introduced into the pre-mixing pipe can be mixed and supplied to the combustion furnace.

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; A pre-mixing pipe disposed on the outside of the ammonia supply pipe and connected to the ammonia supply pipe, into which a portion of the ammonia introduced into the ammonia supply pipe is introduced; and Air supply unit comprising a first swirler that supplies air to the combustion furnace and the pre-mixing pipe and forms a vortex in the air supplied to the combustion furnace; 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 1, 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.
In Article 1, The air from the air supply unit is introduced into one end of the pre-mixing pipe and discharged through the other end of the pre-mixing pipe, and One end of the above-mentioned pre-mixing tube is equipped with a second swirler that forms a vortex in the incoming air, Ammonia combustion burner.
In Article 1, The air from the air supply unit is introduced into one end of the pre-mixing pipe and discharged through the other end of the pre-mixing pipe, and At one end of the above-mentioned pre-mixing tube, at least one air inlet hole is provided in the circumferential direction of the pre-mixing tube to change the flow rate of the incoming air, Ammonia combustion burner.
In Article 1, The air from the air supply unit is introduced into one end of the pre-mixing pipe and discharged through the other end of the pre-mixing pipe, and The other end of the above-mentioned pre-mixing pipe is equipped with a third swirler that forms a vortex in the discharged air, Ammonia combustion burner.
In Article 1, A pilot burner including an igniter is provided on the outer side of the above ammonia supply pipe, and A mixed fuel is supplied to and burned in the pilot burner above, Ammonia combustion burner,
In Article 6, A mixer connected to the pilot burner and supplying mixed fuel to the pilot burner; An ammonia storage tank that supplies ammonia to the above ammonia supply pipe and the above mixer; An auxiliary fuel storage tank that supplies auxiliary fuel to the auxiliary fuel supply pipe and the mixer; and A pilot air supply unit that supplies air to the above-mentioned mixer; further comprising Ammonia combustion burner.
In Article 7, It further includes a control unit that controls the operation of the ammonia tank, the auxiliary fuel storage tank, and the air supply unit. The control unit supplies auxiliary fuel, ammonia, and air to the mixture during the initial combustion phase, and cuts off the supply of auxiliary fuel to the mixture after a predetermined time has elapsed. 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