高炉浓相喷煤合理输送速度的实验研究
Experimental Study on Reasonable Gas Velocity of Dense Phase Coal Injection in Blast Furnace
何海熙 1尹晓莹 2邓廷婷1
作者信息
- 1. 中冶赛迪信息技术(重庆)有限公司智能炼铁部,重庆 401147
- 2. 中冶赛迪工程技术股份有限公司炼铁事业部,重庆 401147
- 折叠
摘要
通过数值模拟和中试实验对高炉煤粉喷吹过程进行了相关研究,包括不同管径内气流速度与煤粉流型、管道内阻损的关系研究以及管道长度对该关系的影响等.研究结果表明:随着气流速度从10m/s左右开始下降,煤粉流型将从均匀流逐步发展为脉冲流、部分流直至堵塞.对于直径为DN=65 mm的管道,气流流速小于5 m/s后,煤粉开始沉降;对于直径DN=100 mm的管道,气流流速小于5 m/s后,煤粉开始沉降,此时管道单位长度阻损为0.6～1.1 kPa/m.当管道长度从100 m增加至1 400 m后,煤粉速度建议控制在5 m/s以上,表明管道长度对煤粉喷吹系统气流速度的选择影响相对较小.该研究结果可为高炉煤粉输送和喷吹过程的气流参数选择提供参考.
Abstract
This paper conducts relevant research on the coal injection process in blast furnace through numerical simulation and pilot experiments,including the study of the relationship between airflow velocity and coal flow pattern,pipeline resistance in different pipe diameters,and the influence of pipeline length on this relationship.The research results show that as the airflow velocity decreases from about 10 m/s,the coal flow pattern will gradually develop from uniform flow to pulse flow,partial flow,and eventually blockage.For a pipe diameter of DN=65 mm,coal begins to settle down when the airflow velocity is less than 4m/s;for a pipe diameter of DN=100 mm,coal begins to settle down when the airflow velocity is less than 5 m/s,at which time the unit length pipeline resistance is 0.6～1.1 kPa/m.When the pipeline length increases from 100 m to 1 400 m,the critical airflow velocity for coal settling remains above 5 m/s,indicating that the pipeline length has a relatively small impact on the airflow velocity selection in the coal injection system.The research results of this paper can provide reference for the selection of airflow parameters in the coal transport and injection process in blast furnace.
关键词
浓相喷煤/气流速度/煤粉流型/堵塞Key words
dense phase coal injection/gas velocity/pulverized coal flow pattern/plugging引用本文复制引用
出版年
2024
NETL
NSTL
万方数据