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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2023.11
- 수록면
- 206 - 209 (4page)
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이 논문의 연구 히스토리 (3)
2023
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In coal fired power generation, cofiring ammonia replacing coal has emerged as a potential solution to mitigate carbon dioxide. For ammonia cofiring, it is important to minimize NOx emissions while maintaining boiler performance in terms of flame stability, combustion efficiency, and heat distribution. In this study, ammonia cofiring methods varying its inlet, speed, and direction were evaluated using CFD in 500 MWe tangential-firing pulverized coal boiler. To suppress fuel NO formation, secondary air supply around the ammonia inlet was moved to SOFA, resulting in burner zone stoichiometric ratio of 0.8, while the overall excess air ratio was fixed at 15%. When ammonia is injected from the lower part of the boiler where fireball begins to form, endothermic ammonia decomposition delays ignition/combustion of coal, leading to significant decrease in boiler performance. When ammonia is injected from the upper part of the burner zone, ammonia flow moves along the outside of the fireball where is oxygen-rich resulting in increase of ammonia oxidation. By increasing speed of ammonia, it can penetrate fuel-rich fireball leading to decrease in NO emissions. Furthermore, Injecting ammonia with opposite direction promotes the 연료 농후 and reactions of O₂ with unburned gases, while NO emission remains almost the same.
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