【摘要】 在含铬废物的燃烧处理中,Cr2O3是最主要的燃烧产物,且呈颗粒状态。本文采用氢氧扩散火焰模拟工业燃烧过程。在燃烧火焰中铬和氧反应生成Cr2O3,通过成核和凝并形成Cr2O3颗粒。实验研究运用动态光散射技术,并由Cr（CO）6在室温下快速分解产生铬,跟随燃料氢一起进入燃烧室。数值研究采用离散分区模型,数值模拟的结果和实验测量结果是一致的,都表明试验条件下火焰顶端的 Cr2O3颗粒的尺寸大约是 70nm。更多还原

【Abstract】 Cr2O3 is considered as the dominant incineration product during the combustion disposal of chromium waste. A hydrogen/air diffusion flame was employed to simulate the process of an industrial incineration. Cr2O3 aerosols were generated inside the flame by the gas phase reaction of chromium and oxygen. Aerosol and clusters can then be easily formed in the flame by nucleation and coagulation. An axisymmetric Discrete-Sectional model was adopted to calculate the Cr2O3 aerosol behavior. The experimental measurement method was Dynamic Light Scattering. Chromium came from the rapid decomposition of chromium hexacarbonyl (Cr(CO)6) in room temperature and was carried into the combustion chamber by hydrogen. The numerical predicted results agreed well with those of the experimental measurement. Both results show that the Cr2O3 aerosol size reached about 70 nanometer at the flame top.更多还原