摘要
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 。
Based on the study of gas solid flow field in blowpipe of BF with oygen enriched PCI, the oxygen and coal concentration distribution inside the blowpipe were simulated and discussed, including the influence of position and inserting angle of the oxygen coal lance, the pattern of the oxygen enriched jet, as well as grain size of the coal. It is shown that the oxygen concentration around the particles of coal can be improved by adopting suitable oxygen coal lance, thereby both of the utilization efficiency of oxygen and the coal combustion rate can be improved. The rotational jet of local enriched oxygen can improve the mixing of oxygen and pulverized coal, but the effect of jet from oxygen coal lance is much weaker than that of the blast flow in blowpipe.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2000年第B09期6-9,共4页
Journal of Iron and Steel Research
关键词
高炉
喷煤
直吹管
氧浓度场
煤粉浓度场
blast furnace
pulverized coal injection
blowpipe
mathematical model
oxygen concentration field
pulverized coal concentration field
