CAJ | 학술논문

为分析转炉煤气显热回收过程中被高温颗粒引燃危险性,自行设计了激光辐射加热氧化铁颗粒引燃转炉煤气实验平台.以转炉煤气/空气混合物压力及温度变化为引燃判据,研究不同初始温度及粒径颗粒引燃混合物的规律.结果表明,转炉煤气/空气混合物存在引燃敏感浓度,当受辐射颗粒粒径相同、初始温度为100℃时混合物敏感浓度比35℃时上升了5%；初始温度为35,100,200℃时,粒径1.5 mm 的颗粒引燃温度比0.5 mm 的分别下降137.6,145及134.5℃；颗粒粒径为0.5,1.0及1.5 mm 时,初始温度为200℃时的引燃温度比35℃时分别下降了19.8,11.6及16.7℃.研究结果对高温转炉煤气进入换热器前设置除尘粒径限制具有参考意义.
위분석전로매기현열회수과정중피고온과립인연위험성,자행설계료격광복사가열양화철과립인연전로매기실험평태.이전로매기/공기혼합물압력급온도변화위인연판거,연구불동초시온도급립경과립인연혼합물적규률.결과표명,전로매기/공기혼합물존재인연민감농도,당수복사과립립경상동、초시온도위100℃시혼합물민감농도비35℃시상승료5%；초시온도위35,100,200℃시,립경1.5 mm 적과립인연온도비0.5 mm 적분별하강137.6,145급134.5℃；과립립경위0.5,1.0급1.5 mm 시,초시온도위200℃시적인연온도비35℃시분별하강료19.8,11.6급16.7℃.연구결과대고온전로매기진입환열기전설치제진립경한제구유삼고의의.
In order to analyze the explosion risk of converter gases in the process of reclaiming,a set of test devices for converter gas ignition by iron oxide particles heated radiatively was set up. The rules of mixture ignition at varied initial temperatures and with particle diameters were investigated,based on the explosion pressure and temperature changes of converter gases /air mixtures.The results showed that when the particle diameters are constant,the sensitive concentrations of converter gases /air mixtures increase by 5% if the initial temperature changes from 100 ℃ to 35 ℃.The ignition temperatures of 1.5 mm-diameter particles drop by 137.6,145 and 134.5 ℃ compared to the 0.5 mm-diamete particles when the initial temperature is 35,100 and 200 ℃ respectively.When the particle diameters are 0.5 mm,1.0 mm and 1.5 mm separately,the ignition temperatures decrease by 19.8,1 1.6 and 16.7 ℃ with the initial temperature changing from 200 ℃ to 35 ℃.The research findings can provide a reference for limiting hot particle diameters before high temperature converter gases enter heat exchangers.