A biomass pellet rotary burner was chosen as the research object, in order to study the influence of excess air coefficient on the combustion phenomenon of biomass rotary burner, the finite element simulation model of a biomass rotary burner was established, and simulation results of a biomass rotary burner were verified by the experiment. The computational fluid dynamics software was applied to simulate the combustion characteristics of biomass rotary burner in a steady-state condition, and the effect of excess air coefficient on temperature field and component concentration field in biomass rotary burner was analyzed. The results show that the flue gas flow rate inside the burner gradually increases with the increase of air velocity, the area with large temperature is mainly concentrated in the middle region of the rotary burner, and the maximum combustion temperature also appeared in the middle region of the combustion chamber, and the formation area of CO decreases with the increase of excess air coefficient. CO2 is mainly concentrated in the middle region of the burner, and the CO2 generating region decreases with the increase of excess air coefficient. The experimental value of the combustion temperature of the biomass rotary burner is in good agreement with the simulation results.

中文翻译：

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生物质颗粒燃料旋转燃烧器燃烧及排放特性的影响分析

以生物质颗粒回转燃烧器为研究对象，为研究过量空气系数对生物质回转燃烧器燃烧现象的影响，建立了生物质回转燃烧器有限元仿真模型，得到了生物质回转燃烧器的模拟结果。通过实验验证了旋转燃烧器。应用计算流体动力学软件模拟生物质旋转燃烧器稳态燃烧特性，分析了过量空气系数对生物质旋转燃烧器温度场和组分浓度场的影响。结果表明，燃烧器内的烟气流量随着风速的增加而逐渐增大，温度较大的区域主要集中在旋转燃烧器的中部区域，最高燃烧温度也出现在燃烧室中部区域，CO的形成面积随着过量空气系数的增加而减小。CO2 主要集中在燃烧器中部区域，CO2 产生区域随着过量空气系数的增加而减小。生物质旋转燃烧器燃烧温度的实验值与模拟结果吻合较好。