热力发电2024，Vol.53Issue(3)：99-109,11.DOI:10.19666/j.rlfd.202310160
W火焰锅炉SCR脱硝超低排放技术及应用
Ultra low emission technology of SCR flue gas denitration in W-flame boiler and the application
摘要
Abstract
By the end of 2021,over 95%of coal-fired thermal power units in China have achieved ultra-low emission of nitrogen oxides,with the remaining being W-flame boilers that burn anthracite.Due to the high mass concentration of nitrogen oxides generated,which often reaches 750～1 200 mg/m3,achieving ultra-low emissions is difficult,making it the"last mile"for China to achieve ultra-low emission policies.At present,selective catalyst reduction(SCR)denitration flow field technology mainly includes"SCR partition hybrid dynamic leveling technology","full flue section mixing flow field technology",and"conventional accurate ammonia injection technology",etc.Taking a W-flame boiler of which the design denitration efficiency needs to be up to 95%as an example,this paper compares the performance indicators of various technologies through CFD simulation,and the indicators of the"SCR partition hybrid dynamic leveling technology"are significantly superior to other technologies.After the project transformation,when the mass concentration of nitrogen oxides at the denitration system inlet is 1 000 mg/m3 and that at the system outlet is lower than 50 mg/m3,the ammonia escape can be kept less than 3 μL/L,far exceeding the maximum design efficiency of the conventional SCR denitration system.The research provides a new technical route for ultra-low NOx emission of W-flame boilers.关键词
W火焰锅炉/脱硝/SCR/流场技术/氨逃逸/分区混合Key words
W-flame boiler/denitration/SCR/flow field optimization/ammonia escape/zone mixing引用本文复制引用
罗志,兰永胜,杨小金,杨晓刚,李淑宏,王晓冰,潘栋,何育东,晋中华,尚桐,范玮,邓彪,任建永..W火焰锅炉SCR脱硝超低排放技术及应用[J].热力发电,2024,53(3):99-109,11.基金项目
中国华能集团有限公司总部科技项目(HNKJ21-H46,HNKJ22-HF48) （HNKJ21-H46,HNKJ22-HF48）
陕西省重点研发计划项目资助(2023-YBGY-289)Science and Technology Project of China Huaneng Group Co.,Ltd.(HNKJ21-H46,HNKJ22-HF48) （2023-YBGY-289）
Key Research and Development Program of Shaanxi(2023-YBGY-289) （2023-YBGY-289）
