喷吹方式对煤粉燃尽率的影响  

Influence of pulverized coal injection pattern on burnout

作　　者：李永清[1,2] 张小辉[3] 张家元[1] 闫红杰[1] 周孑民[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]湖南工业大学冶金工程学院,湖南株洲412007 [3]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《中南大学学报（自然科学版）》2014年第7期2432-2439,共8页Journal of Central South University:Science and Technology

基　　金：国家重大产业技术开发专项基金资助项目([2009]1717)

摘　　要：为研究高炉喷煤采用不同喷吹方式对煤粉燃烧效率、煤焦置换比以及高炉生产的经济效益的影响,以某企业3号高炉为对象,建立回旋区煤粉燃烧过程的计算模型,并基于该计算模型研究不同煤种、喷枪形式和富氧率对煤粉燃尽率的影响。研究结果表明:烟煤的燃尽率高于无烟煤和混煤的燃尽率,双煤枪的燃尽率高于单煤枪和氧煤枪的燃尽率;当喷煤比不超过150 kg/t时,该高炉的最佳富氧率为5%。To research the influence of different pulverized coal injection ways on combustion efficiency, coal tar replacement ratio and economic benefit in blast furnace, the mathematical model of pulverized coal combustion process in the raceway was established based on the No.3 blast furnace in an iron and steel company. The influences of different types of coal, spray gun and oxygen enrichment rate on pulverized coal burnout were studied based on this mathematical model. The results show that the burnout of bituminous coal and double coal spray gun are the highest in different types of coal and spray gun, and the best oxygen enrichment rate is 5% when the coal injection rate is less than 150 kg/t.

关 键 词：回旋区 燃尽率 喷吹方式 数值仿真 

分 类 号：TF536.1[冶金工程—钢铁冶金]