Computational Fluid Dynamics Study of Biomass Combustion in a Simulated Ironmaking Blast Furnace: Effect of the Particle Shape
Computational Fluid Dynamics Study of Biomass Combustion in a Simulated Ironmaking Blast Furnace: Effect of the Particle Shape
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DOI：
10.1021/acs.energyfuels.7b03150
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发表时间：
2017-12
期刊：
影响因子：
5.3
通讯作者：
Yiran Liu;Yansong Shen
中科院分区：
文献类型：
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作者：
Yiran Liu;Yansong Shen
生物质是一种碳中性燃料，具有应用于高炉喷煤技术的潜力。与煤粉颗粒相比，生物质颗粒的形状变化较大，长径比的变化会影响生物质颗粒的运动和转化。在这项研究中，计算流体动力学（CFD）模型的开发，以模拟生物质喷入高炉的流动和热化学行为。该模型具有非球形颗粒形状和改进的脱挥发分模型。然后，该模型被应用到中试规模的木炭喷射试验中，使用中试规模的PCI试验台在模拟高炉条件下进行模型验证。模拟结果与测量结果的比较表明，与球形粒子相比，非球形粒子由于在燃烧室中的传播时间较短，因而其燃耗较小;此外，模型预测的燃耗与实验结果吻合较好。
Biomass is a carbon-neutral fuel and has a potential to be used in pulverized coal injection (PCI) technology in ironmaking blast furnaces (BFs). Compared with pulverized coal particles, biomass particles vary considerably in particle shape, and thus the change of aspect ratio of biomass particles may affect the motion and conversion of biomass particles. In this study, a computational fluid dynamics (CFD) model is developed to simulate the flow and thermo-chemical behaviors related to biomass injection into BFs. The model features non-spherical particle shapes and an improved devolatilization model. The model is then applied to a pilot-scale test of charcoal injection using a pilot-scale PCI test rig under simulated BF conditions for model validation. The burnout comparisons between simulation and measurement indicate that compared to spherical particles, the non-spherical particles show smaller burnouts due to the shorter travelling time in the chamber; moreover, the burnouts predicted by the model cons...