不同一次风系数下热解气扩散燃烧及NO排放特性数值模拟  

Numerical Simulation of Ammonia/Methane Non-premixed Combustion Characteristics and NO Emission

作　　者：张胡日查 齐娜娜[1] 颜龙 Zhang Huricha;Qi Nana;Yan Long(Beijing Key Laboratory of Monitoring and Control of Pollutants in Thermoelectric Processes,School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing,102206)

机构地区：[1]华北电力大学热电生产过程污染物监测与控制北京市重点实验室,北京102206

出　　处：《当代化工研究》2024年第20期57-60,共4页Modern Chemical Research

基　　金：2020年国家重点研发计划项目“多段流化床芳构化反应器的设计和优化”(项目编号:2020YFB0606402);2021年山西省重点研发计划项目“饱和无机盐溶液气液固三相喷射闪蒸过程数值模拟”(项目编号:202102090301023)。

摘　　要：利用数值模拟方法,在质量、动量、热量传递及化学反应相耦合的综合CFD模型上,以带有旋流一次风喷嘴的燃烧器为研究对象,得到了不同一次风系数下塑料热解气-空气非预混湍流燃烧的燃烧温度、效率和NO排放数据,并进行了一次风系数的优选。研究结果表明一次风系数对NO排放的影响不只体现在燃烧器最高温度上,同时会通过改变燃烧器内的局部温度和流场分布影响NO排放。在本研究参数范围内,一次风系数保持在0.8~0.9时可满足一定的燃烧效率和较高出口温度下的低NO排放要求。Based on the mass,momentum,heat transfer and chemical reaction coupled CFD model,the combustion temperature,efficiency and NO emission data of plastic pyrolysis gas-air turbulent diffusion combustion with different primary air coefficients were obtained,and the optimized primary air coefficient was selected.The results indicate that when the primary wind coefficient changes,the maximum temperature cannot fully reflect the amount of NO emission,while the local temperature and flow field should be comprehensively considered.Within the range of parameters in this study,the primary air coefficient maintain at 0.8~0.9 can meet the high efficiency,outlet temperature and low NO emission.

关 键 词：热解气 扩散燃烧 一次风系数 NO排放 数值模拟 

分 类 号：TQ517.5[化学工程]