空气消耗系数对转炉汽化冷却烟道运行的影响  

Influence of excess air coefficient on operation of converter waste heat boiler

作　　者：杨森 秦勤[1] 于庆波[1] YANG Sen;QIN Qin;YU Qingbo(School of Metallurgy,Northeastern University,Shenyang 110004,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110004

出　　处：《炼钢》2022年第2期75-82,共8页Steelmaking

基　　金：重庆市科技计划项目(CSTC2018JSZX-CYZDX0100)。

摘　　要：转炉汽化冷却烟道的安全运行受吹炼时间、空气消耗系数、烟气流速等因素的影响,其中空气消耗系数与实践生产联系最为紧密。依据转炉汽化冷却烟道的热力计算过程编制了热力计算程序,当空气消耗系数发生变化时,通过热力计算程序研究了炉气的理论燃烧温度、汽化冷却烟道的传热量及排烟温度的变化规律。结果表明,180 t转炉在炉气温度1600℃,初始炉气成分φ(CO)=90%,φ(CO_(2))=10%的情况下,当空气消耗系数从0.08增长至0.30时,炉气的理论燃烧温度提高了286.1℃,烟气中φ(CO)从72.468%下降到41.052%,换热量大幅增加,烟道出口排烟温度提高了139.12℃。The safe operation of the converter waste heat boiler is affected by factors such as blowing time,excess air coefficient,flue gas velocity,etc.Among them,the excess air coefficient is most closely related to practical production.Based on the thermal calculation process of the converter waste heat boiler,a thermal calculation program was compiled,and change rules of theoretical combustion temperature,heat transfer and exhaust gas temperature were obtained based on the program when the excess air coefficient changed.To the 180 t converter waste heat boiler,under the conditions that the primary furnace gas temperature is 1600℃and gas volume composition is 90%CO and 10%CO_(2),the result shows the theoretical combustion temperature increases by 286.1℃,the proportion of CO in flue gas decreases from 72.468%to 41.052%,the heat transfer increases significantly,and the exhaust gas temperature increases by 139.12℃as the excess air coefficient increases from 0.08 to 0.3.

关 键 词：转炉汽化冷却烟道 空气消耗系数 理论燃烧温度 传热量 排烟温度 

分 类 号：X757[环境科学与工程—环境工程]