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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Pulverized coal char combustion: the effect of particle size on burner performance
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Pulverized coal char combustion: the effect of particle size on burner performance

机译：煤焦粉燃烧：粒度对燃烧器性能的影响

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摘要

A two-dimensional, two-phase combustion model of pulverized coal char is presented in this paper. It is of particular importance to reveal the controlling mechanisms, through prediction of the diffusion and reaction rates and to evaluate the effect of initial coal-particle size on the performance of the burner. The partial differential equations of conservation of mass, momentum, energy and chemical species are solved taking into consideration turbulent flow, interphase mass and heat transfer, radiative heat transfer and operational conditions such as coal feed and primary and secondary air. The equations are integrated with the finite volume methods and are solved for the flow field, temperature field of gaseous and solid phases and the concentration of reactants and products. The results are compared with experimental data from the literature and the comparison is satisfactory.
机译：本文提出了煤粉的二维，两相燃烧模型。通过预测扩散和反应速率揭示控制机理，并评估初始煤颗粒尺寸对燃烧器性能的影响尤为重要。考虑湍流，相间质量和热传递，辐射热传递以及运行条件（如煤进料，一次和二次空气），求解了质量，动量，能量和化学物质守恒的偏微分方程。这些方程与有限体积方法结合在一起，并求解了气相和固相的流场，温度场以及反应物和产物的浓度。将结果与文献中的实验数据进行比较，并且比较令人满意。

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