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在对高炉局部富氧喷煤直吹管内气固两相流流场研究的基础上 ,对直吹管内氧和煤粉的浓度场进行了数值研究 ,包括氧 -煤喷枪的插入角度和枪位、局部富氧射流的漩流数以及煤粉粒度的影响。结果表明 ,氧 -煤喷枪的插入角度和枪位对氧 ,特别是对煤粉的浓度场分布有较大的影响 ;合适的富氧率下氧气的旋流作用能够促进氧气与煤粉的混合 ,增强氧 -煤喷枪出口附近区域的动量传输和质量传输 ;利用氧 -煤喷枪可以形成一个局部富氧区域 ,显著提高煤粉周围的氧浓度 ,促进煤粉的快速燃烧
Based on the study of the gas-solid two-phase flow field in the blast furnace partially oxygen-enriched direct injection pipe, the numerical study of oxygen and pulverized coal concentration in the blast furnace was carried out, including the insertion angle and gun position , The number of swirling flow of local oxygen-rich jet and the influence of coal particle size. The results show that the insertion angle and gun position of oxygen-coal spray gun have a great influence on the distribution of oxygen concentration, especially on the concentration field of pulverized coal. The swirling effect of oxygen can promote the mixing of oxygen and pulverized coal , To enhance the momentum transfer and mass transfer in the vicinity of the outlet of the oxy-coal spray gun. By using the oxygen-coal spray gun, a local oxygen-rich region can be formed, which significantly increases the oxygen concentration around the pulverized coal and accelerates the rapid combustion of the pulverized coal