随着社会经济发展，我国各类垃圾产量显著增加，新型热解法处理的垃圾热解 气高效清洁利用研究相继开展。本研究采用 FLUENT 软件对垃圾热解气在燃烧器中的低 氧稀释混合 ( MILD) 燃烧状况进行数值模拟，研究了燃料喷管孔径、空气喷管孔径、 燃料喷管和空气喷管间距、空气喷管分布以及热值波动对燃烧室内燃烧及 NO 排放的影 响。结果表明: 空气喷管管径改变导致的空气射流速度改变对燃烧状况的影响最为显 著，射流速度增加引起的湍流以及卷吸作用可使 MILD 燃烧达到更好的效果，空气喷管 孔径存在较优值，以 8 mm 为宜。燃料射流速度的增加对燃烧效果影响较小，高速有利 于燃料射流刚性以及燃烧区域延长，燃料喷管孔径也存在较优值，以 8 mm 为宜。空气 与燃料喷管间距影响了扩散过程以及回流区域大小，可与孔径匹配出最优值，喷管间距 以 15 mm 为宜。空气射流的周向分布均匀程度影响燃烧效果，但对 NO 排放量影响不 大，以 4 个空气喷管为宜; 此燃烧器可满足热解气热值波动在 ± 20% 的 MILD 燃烧。

With the development of social economy，the production of all kinds of garbage is increasing rapidly， and the research on efficient and clean utilization of pyrolysis gas of garbage is gradually carried out． This study used FLUENT software to simulate the MILD combustion of MSW pyrolysis gas in the burner，and the effects of fuel nozzle diameter，air nozzle diameter，distance between fuel nozzle and air nozzle，air nozzle distribution and thermal value fluctuation on the combustion and NO emission in the burner were explored． The results show that the change of jet velocity indicated by the change of air nozzle diameter has the most significant effect on combustion， and the increase of jet velocity can achieve better MILD combustion effect by turbulence and entrainment． And there is an optimal value of 8mm of air nozzle diameter in this study． The increase of fuel jet velocity has less effect on combustion effect，the high speed of fuel jet is conducive to fuel jet rigidity and combustion zone extension，and there is an optimal value of 8 mm of fuel nozzle diameter in this study． The diffusion process and the size of return area can be influenced by the distance between air and fuel nozzle，which can be matched with the aperture to obtain an optimal value when the nozzle spacing is 15mm． The uniformity of the air jet distribution affects the combustion effect，but has little effect on NO emission，so 4 air nozzles are suitable． The burner can satisfy the MILD combustion with the calorific value of the pyrolysis gas fluctuating at 20% ．