转炉汽化冷却烟道数值模拟  

Numerical simulation of converter vaporization cooling flue

作　　者：王彦刚 王洪利 梁精龙 张振迎 WANG Yan-gang;WANG Hong-li;LIANG Jing-long;ZHANG Zhen-ying(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei Province,China;College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063210,Hebei Province,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]华北理工大学建筑工程学院,河北唐山063210

出　　处：《化学工程》2022年第10期69-73,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(51774143);河北省自然科学基金资助项目(E2020209121);唐山市科技创新团队培养计划项目资助项目(21130207D)。

摘　　要：为了改善由于冶炼制度或汽化冷却烟道设计不尽合理导致的冷却水管磨损或过烧、爆管等状况,运用数值模拟的方法并借助现场运行数据,对转炉汽化冷却烟道内的烟气流动及传热特性进行了深入分析。结果表明:从烟道入口到出口,烟气温度有明显降低的趋势。烟气的流速在烟道的弯头处外侧流速较大,弯头外侧各段的连接处有较为严重的冲蚀,冲蚀最严重的区域位于活动烟罩与炉口段的连接处。在转炉汽化冷却烟道内烟气和壁面之间,辐射换热是主要的换热方式。烟道入口速度由10 m/s增加到35 m/s,对流换热量占比由9.13%增加到16.29%,辐射换热量达到83.71%;烟气入口温度由1515℃增加到2015℃,对流换热量占比减少约35.10%。The flue gas flow and heat transfer characteristics of the converter vaporization cooling flue were analyzed in depth using numerical simulation method and operational data to improve the wear,over-burn,and tube burst of cooling water pipe caused by unreasonable smelting system or vaporization cooling flue design.The results show that the temperature of flue gas decreases obviously from inlet to outlet.The flow velocity of flue gas is greater outside the elbow of flue,and there is a serious erosion at the junction of each section outside the elbow,the most serious erosion area is located at the junction of the movable fume hood and the furnace mouth section.Radiation heat transfer is the main heat transfer mode between the flue gas and the flue wall in converter vaporization cooling flue.The inlet velocity of flue increases from 10 m/s to 35 m/s,the proportion of convective heat transfer increases from 9.13%to 16.29%,and the proportion of radiation heat transfer can reach 83.71%.The inlet temperature of flue gas increases from 1515℃to 2015℃,and the proportion of convective heat transfer decreases by about 35.10%.

关 键 词：转炉汽化冷却烟道 烟气流动 传热特性 冲蚀 

分 类 号：TF341.1[冶金工程—冶金机械及自动化]