【摘要】 采用数值模型,研究了煤热解、燃烧过程中挥发分氮的析出、中间含氮产物HCN的生成以及转变为NO的过程。应用有限体积法对质量、化学组分、动量和热量守恒方程进行离散求解,并与试验结果进行了比较。研究结果揭示了炉膛温度、颗粒直径以及氧浓度等参数对煤中挥发分氮的析出和进一步转化为NO过程的影响。更多还原

【Abstract】 The particle model was employed to study the coal devolatilization, the release of volatile fuelnitrogen, formation of HCN and the subsequent conversion to NO during the devolatilization The finite volume numerical scheme was used to solve the equations of mass, chemical species, momentum and heat transfer conservation about the coal particle The two competing reactions model was used to describe the devolatilization process, the results from the numerical simulations were compared and also verified with the experimental data The simulating results show that the furnace temperature, particle diameter and the environmental oxygen concentration have influences on the release of volatile fuel nitrogen and the subsequent conversion to NO更多还原