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Influence of secondary air blade angle and oxygen-rich combustion characteristics of an improved Babcock swirl burner

文献类型：期刊论文

作者Huang, Chunchao1; Li, Zhengqi1,5; Wang, Yufei1; Fang, Fan2; Liu, Huacai3; Chen, Zhichao1; Liu, Yujie4
刊名APPLIED THERMAL ENGINEERING
出版日期2024-03-15
卷号241页码:12
关键词Low-load stabilized combustion Swirl burner Flow characteristics Oxygen-enriched combustion
ISSN号1359-4311
DOI10.1016/j.applthermaleng.2024.122383
通讯作者Li, Zhengqi(green@hit.edu.cn)
英文摘要Innovations in research methods and stable combustion technologies were urgent to enhance flexibility in faulty coal-fired boiler. Focusing boiler start-stop processes was vital for effective peak shaving in power plants. The integration of enriched oxygen stable combustion with swirling techniques showed promise in improving low-load performance. In the cold single-phase experiment, the influence of secondary blade angle on the flow field of an improved Babcock burner was observed. Industrial experiments were conducted on a 700 MW boiler, exclusively implementing the improved burners in the lower layer of the boiler front wall. Stable annular recirculation zones were observed at the burner outlet with blade angles of 30 degrees, 45 degrees, 60 degrees, and 75 degrees for the secondary air. Increasing the blade angle expanded the recirculation zone length and decreased the gas net flow ratio. The angle, between 45 degrees and 60 degrees, facilitated air mixing and protected against outlet slagging and high-temperature corrosion. During cold start-up process of the boiler, supplying 0 kgs(-1) of pure oxygen to a single improved burner increased the flue gas temperature by about 50 degrees C within 0.4 m of the primary air duct outlet. Increasing the oxygen flow rate to 0.2456 kgs(-1) steadily raised the flue gas temperature at 405 MW. The gas temperature in the burner central region was generally lower than the secondary air zone, resulting in a longer ignition distance for the pulverized coal. Higher oxygen levels intensified the heating rate and reduced the ignition distance in the central region.
WOS关键词NOX EMISSIONS ; COAL ; FLOW ; TEMPERATURE ; CHINA ; FLAME
资助项目Heilongjiang Touyan Innovation Team Program
WOS研究方向Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
语种英语
WOS记录号WOS:001161812000001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Heilongjiang Touyan Innovation Team Program
源URL[http://ir.giec.ac.cn/handle/344007/40961]  
专题中国科学院广州能源研究所
通讯作者Li, Zhengqi
作者单位1.Harbin Inst Technol, Sch Energy Sci & Engn, 92 West Dazhi St, Harbin 150001, Peoples R China
2.Xian Thermal Power Res Inst Co Ltd, 99 Yan Xiang St, Xian 710054, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Energy St, Guangzhou 510630, Peoples R China
4.Shandong Dezhou Elect Power Co Ltd, Dezhou 253000, Peoples R China
5.92 West Dazhi St, Harbin 150001, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Chunchao,Li, Zhengqi,Wang, Yufei,et al. Influence of secondary air blade angle and oxygen-rich combustion characteristics of an improved Babcock swirl burner[J]. APPLIED THERMAL ENGINEERING,2024,241:12.
APA Huang, Chunchao.,Li, Zhengqi.,Wang, Yufei.,Fang, Fan.,Liu, Huacai.,...&Liu, Yujie.(2024).Influence of secondary air blade angle and oxygen-rich combustion characteristics of an improved Babcock swirl burner.APPLIED THERMAL ENGINEERING,241,12.
MLA Huang, Chunchao,et al."Influence of secondary air blade angle and oxygen-rich combustion characteristics of an improved Babcock swirl burner".APPLIED THERMAL ENGINEERING 241(2024):12.

入库方式： OAI收割

来源：广州能源研究所

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