摘要
针对大型生活垃圾焚烧炉燃烧运行过程中存在炉内温度分布性差、气流扰动性不足及污染物排放不达标等问题,运用计算流体力学对焚烧炉进行数值模拟分析,研究了800 t/d炉排式垃圾焚烧炉燃烧运行过程中床层及炉膛内气体温度、速度及各组分质量分数等分布情况。结果表明:炉内温度分布良好,可燃物燃烧较为充分;炉膛出口烟气平均温度达到1 146 K(873℃),满足国家垃圾焚烧烟气污染物排放的规定;二次风入口处速度值最大,二次风的喷入可在炉膛内形成湍流,促使炉膛内各组分混合均匀,有效遏制二噁英类有机物的生成。通过研究可为提高垃圾燃烧效率、烟气污染物排放达到国家排放标准提供一定的理论依据,也为焚烧炉的结构优化设计提供可靠保证。
According to the problems of temperature distribution ununiformity in the combustion of large living garbage incinerator,insufficient airflow disturbance,and pollutants below standard,the computational fluid dynamics(CFD)simulation analysis was carried out on the 800t/d municiple solid waste(MSW)incinerator to investigate gas temperature distribution,velocity and every component concentration.The results show that the temperature distribution in the furnace is favourable,and the combustibles burn adequately.The average temperature of flue gas at the outlet of the furnace reaches 1146K(873℃),which meets the regulations of waste incineration flue gas emission in China.The velocity of the secondary air inlet is the largest,and the spray of the secondary air forms turbulence in the furnace,which can promote the uniform mixing of components in the furnace and effectively curb the generation of dioxins.The research can provide a theoretical basis on improving the efficiency of garbage combustion and meeting the national emission standards for the emission of flue gas pollutants,and also provide a reliable guarantee for the optimization design of incinerator structure.
作者
曹卫
刘晓
何志刚
CAO Wei;LIU Xiao;HE Zhigang(College of Mechanical Engineering,Yancheng Institute of Technology,Yancheng 224000,China;Jiangsu Tianying Environmental Energy Equipment Co.,Ltd,Nantong 226600,China)
出处
《热科学与技术》
CSCD
北大核心
2024年第6期578-586,共9页
Journal of Thermal Science and Technology
基金
盐城工学院研究生科研与实践创新计划资助项目(SJCX21_XY006)
关键词
焚烧炉
燃烧运行
计算流体力学
数值模拟
incinerator
combustion operation
computational fluid dynamics
numerical simulation
