Abstract The three-dimensional (3-D) comprehensive mathematical model was developed to simulate the coal gasification process in an entrained flow gasifier with a swirl burner. The models employed or developed includes the coal devolatilization model, the char combustion and gasification model, the gas homogeneous reaction model, the random-trajectory model, gas turbulence model, and the P-1 radiation model. The solution of models was executed based on the computational fluid dynamics (CFD). By qualitatively comparing the results at different swirl number, the significant influences of swirl on characteristics of coal gasification such as flow distributions, gas temperature and product composition including hydrogen (H2), carbon monoxide (CO), etc., and on the performance of coal gasification such as averaged exit product composition, carbon conversion rate and cold gas efficiency, were in detail discussed. Especially, a proper swirl number (S ≤ 0.65) in favor of gasification was found for the investigated gasifier in this paper.

中文翻译：

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旋流对气流床煤气化炉气化特性的影响

摘要 建立了三维（3-D）综合数学模型来模拟带有旋流燃烧器的气流气化炉中的煤气化过程。使用或开发的模型包括煤脱挥发分模型、焦炭燃烧和气化模型、气体均相反应模型、随机轨迹模型、气体湍流模型和 P-1 辐射模型。模型的求解是基于计算流体动力学 (CFD) 执行的。通过对不同旋流数下的结果进行定性比较，发现旋流对煤气化过程中的流量分布、气体温度、氢气（H2）、一氧化碳（CO）等产物组成等特性以及对煤气化性能的显着影响。煤气化，例如平均出口产品组成，详细讨论了碳转化率和冷气效率。特别是，本文研究的气化炉发现了有利于气化的适当涡流数（S ≤ 0.65）。