首页|Numerical simulation of the effect of coaxial and cross-axis injection modes on pulverized coal combustion in the raceway of blast furnace tuyere

Numerical simulation of the effect of coaxial and cross-axis injection modes on pulverized coal combustion in the raceway of blast furnace tuyere

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The aim of this study is to investigate the influence of the angle of the pulverized coal(PC)injection lance on the combustion characteristics of fuel in the raceway of blast furnace tuyeres.Using FLUENT software,a Euler-Lagrange three-dimensional numerical model was constructed to analyze the influence of different positions of blast furnace tuyere coal powder injection lance(coaxial and cross-axis)on key parameters such as temperature distribution,gas flow,and combustion efficiency.The results demon-strate that adjusting the angle of the injection lance significantly modifies the average and peak tem-peratures in the raceway,while the composition of gas components remains relatively stable.When the injection lance angle is 10°,the average temperature and peak temperature in the raceway are 2294 K and 2747 K,respectively.When the injection lance angle is 12°,the combustion efficiency of the PC reaches 80.8％ .This study reveals the significant impact of the injection lance angle on the combustion process.Especially at an angle of 12°,the combustion efficiency of the blast furnace significantly im-proves.With coaxial injection,the combustion rate increases as the distance between the injection lance tip and the tuyere increases.This paper is instructive for the optimization of the blast furnace com-bustion system,which improve fuel utilization efficiency and reduce environmental emissions.This paper provides practical recommendations for adjusting blast furnace operational parameters,offering insights for achieving more efficient and environmentally friendly industrial production.

Pulverized coal combustionTuyere racewayBlast furnaceCFD simulation

Yunpeng Wang、Lei Gao、Xiaolei Zhou

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Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China

Yunnan Provincial Department of Science,Technology Fund ProjectYunnan Provincial Department of Science,Technology Fund ProjectNational Natural Science Foundation of ChinaYunnan Fundamental Research ProjectsYunnan Fundamental Research ProjectsYunnan Province Xingdian Talent Support Plan Project

KKS0202152010202101AT07008352104351202301AT070795202101AU070088

2024

10.1016/j.partic.2024.06.010

颗粒学报(英文版)
中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD
影响因子：0.632
ISSN：1674-2001
年,卷(期)：2024.93(10)