인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Because of increasing demand to utilize the coke oven gas (COG) for hydrogen production, there is a need to replace COG with natural gas (NG) in the steel making industry. In this study, ideal combustion condition and impact on NOx emission were evaluated in a burner to preheat a ladle used for transport of molten iron. Computational fluid dynamics (CFD) were employed to analyze the distribution of temperature and heat flux in the refractories of an existing ladle. Then, different combustion conditions were assessed for the burner introducing NG. It was found that the same thermal condition of the refractories with the reference case can be achieved for NG combustion by reducing the excess air ratio to match the adiabatic flame temperature. A major NOx reduction was expected by the fuel switching because of lower peak temperatures and reduced contribution of NNH mechanism, which agreed with the field data. Increasing the thermal input of the burner led to a linear increase in the wall temperature and decrease in the thermal efficiency while NOx emission remained steady. Further investigations are required to improve the thermal efficiency by utilizing the enthalpy of the hot flue gas.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.