摘要
焙烧工艺是预焙阳极产品生产的关键环节,在焙烧炉中利用掺氨燃烧的方式可以减少天然气的消耗量,能够提升能源利用效率,降低其碳氧化物排放。本研究使用数值模拟的方法,研究了阳极焙烧炉内燃料在不同质量分数(0、10%、30%、50%)的掺氨比例下的燃烧和排放特性。研究结果表明,随着掺氨比例的增加,焙烧炉中高温区域面积不断减小,排烟中CO和CO_(2)含量也不断减少,燃烧过程中的氮氧化物排放呈现先升高后降低的变化趋势,其中掺氨比例为50%时,氮氧化物排放下降最为显著;综合考虑工艺要求温度和污染物排放两方面因素,本研究建议在实际应用中掺氨比例控制在30%左右,以实现焙烧效果和环保排放的平衡。
The baking process is a key link in the production of prebaked anode products,and the utilization of ammonia-doped combustion in the baking furnace can reduce the consumption of natural gas,which can enhance the efficiency of energy utilization and reduce the carbon oxide emission.In this study,the combustion and emission characteristics of fuels in anode baking furnace with different mass fractions of ammonia doping ratios(0,10%,30%,and 50%)were investigated using numerical simulations.The results show that,with the increase of ammonia blending ratio,the area of high temperature region in the baking furnace decreases,the CO and CO_(2),content in the exhaust smoke also decrease,and the nitrogen oxide emission in the combustion process shows the trend of firstly increasing and then decreasing,in which the nitrogen oxide emission decreases most significantly when the proportion of ammonia blending is 50%;Considering the process requirements of temperature and pollutant emission factors,it is suggested that the proportion of ammonia blending in practical applications should be controlled at about 30%,in order to realize the balance between baking effect and environmental protection emission.
作者
刘立军
王志国
张寅森
刘吉营
毛煜东
杨开敏
Liu Lijun;Wang Zhi-guo;Zhang Yin-sen;Liu Ji-ying;Mao Yu-dong;Yang Kai-min(School of Thermal Energy Engineering,Shandong Jianzhu University,Shandong Jinan 250101,China;Sunstone Development Co.,Ltd.,Shandong Dezhou 25150,China)
出处
《炭素技术》
北大核心
2025年第3期24-30,共7页
Carbon Techniques
基金
山东省高等学校“青创人才引育计划”项目(鲁教[2021]51号)。
关键词
预焙阳极焙烧炉
掺氨燃烧特性
排放特性
数值模拟
Prebaked anode baking furnace
ammonia-mixed combustion characteristics
emission characteristics
numerical simulation
