中文摘要：

运用详细汞化学反应动力学机制和涡耗散概念（eddydissipation conception,EDC）模型对410 t/h四角切圆燃煤锅炉炉内汞释放及下游烟道内汞赋存方式变化进行了模拟,得出煤粉燃烧时炉内汞的析出释放和分布规律,以及下游烟道内汞赋存形态的转变迁移特性。结果表明：在燃煤烟气中,HCl是单质汞氧化的关键组分;温度高于1 000 K时,单质汞是汞的主要赋存形式,HOCl是氧化单质汞的重要组分;温度低于900 K时,氧化态汞是主要的存在状态,氯化物形态的汞化合物含量约为92.36%、HgO含量7.64%,Cl2是产生HgCl2的重要组分;汞的氧化反应主要发生在尾部下行烟道中,HgCl2浓度随温度下降均呈迅速上升趋势。

英文摘要：

The detailed mercury kinetic mechanism and the eddy dissipation conception（EDC） model were used to simulate the mercury emission in furnace and the transformation in flue gas path of 410 t/h tangentially coal-fired boiler.The characteristics of release,distribution and transition of mercury in furnace and downstream flue gas path were obtained.The simulation results show that HCl is crucial in the mercury oxidation process.When temperature of flue gas is above 1 000 K,elemental mercury is the dominant form and HOCl is the important species which oxidizes elemental mercury.By contrast,the oxidized mercury is the main form and the chlorine plays an important role in the generation process of mercury chloride when temperature is below 900 K.The concentration of mercury chloride is about 92.36% and mercuric oxide is 7.64%.Oxidation process occurred in the convection flue and the content of mercury chloride increases rapidly with the temperature falling.