This study presents a comprehensive numerical modeling approach to analyze and evaluate the performance of a throat biomass updraft fixed bed gasification reactor through computational fluid dynamic simulations. The numerical model uses detailed kinetics to capture the complex thermochemical processes within the gasifier. The influence of key parameters such as reactor design on the gasification efficiency and producer gas composition are systematically investigated. Also, performance metrics, including cold gas efficiency, hydrogen-carbon monoxide ratio, and producer gas heating value, are employed to quantitatively quantify the effectiveness of the throat updraft fixed bed gasification reactor to assess the reactors performance under varying configurations. The hydrogen and carbon monoxide concentrations increased by 6.5 % and 5.2 % by changing the throat diameter ratio from 0.14 to 0.33, respectively. Increased gasification efficiency is also observed, from 65.5 % to 77.84 %, within the same ratio range increase. Similarly, a 2.6 % increase is observed in the lower heating valve between the models with throat-to-diameter ratio of 0.14 and 0.33. The findings contribute to a deeper understanding of the gasification process in throat reactors, offering insights into optimization opportunities for enhanced producer gas quality and overall efficiency.

中文翻译：

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生物质气化上升式固定床反应器喉道尺寸数值模拟及性能评价


本研究提出了一种综合数值建模方法，通过计算流体动力学模拟来分析和评估喉部生物质上升气流固定床气化反应器的性能。数值模型使用详细的动力学来捕获气化器内复杂的热化学过程。系统研究了反应器设计等关键参数对气化效率和发生炉煤气成分的影响。此外，还采用包括冷煤气效率、氢-一氧化碳比和发生炉煤气热值在内的性能指标来定量量化喉部上升气流固定床气化反应器的有效性，以评估不同配置下的反应器性能。通过将喉部直径比从 0.14 更改为 0.33，氢气和一氧化碳浓度分别增加了 6.5% 和 5.2%。还观察到气化效率增加，在相同比率范围内增加，从 65.5% 增加到 77.84%。同样，喉部直径比为 0.14 和 0.33 的型号之间的下加热阀增加了 2.6%。这些发现有助于更深入地了解喉式反应器中的气化过程，为提高发生炉煤气质量和整体效率的优化机会提供见解。