高炉氧煤枪技术理论研究

THE THEORETICAL RESEARCH OF OXYGEN-COAL INJECTION IN BLAST FURNACE

氧煤枪及氧煤燃烧器的开发近年来备受人们的关注,并伴随着富氧大喷煤技术的发展而不断完善。通过模拟研究氧煤枪对煤粉燃烧的影响,结果表明采用氧煤枪可以缩短燃烧反应延伸长度,起到减少未燃煤粉作用;通过模拟研究氧煤枪富氧对风口燃烧区氧浓度的影响,结果表明在风口燃烧区的风口中心线方向氧浓度升高,为风口区含碳物质(煤粉和焦炭等)的快速燃烧创造了必要动力学条件;通过模拟研究风口燃烧区煤粉燃烧的效果,结果表明随着氧气浓度的增加,燃料颗粒存留时间缩短。氧浓度为21%时,燃料颗粒存留时间约为0.205 s;而氧浓度达到30%时,燃料颗粒存留时间减小到0.17 s。

The development of oxygen-coal injection and oxygen-coal burner draw attention recently, and it graduallyperfect along with the development of oxygen enriched pulverized coal injection technology. Through simulating the influenceof oxygen-coal injection on coal burning, it conclude that the oxygen-coal injection can shorten the combustion zone, re？duce the unburned coal. Through simulating the influence of oxygen-coal injection on the oxygen concentration in tuyerecombustion zone, it conclude that oxygen concentration rise along with the tuyere center line, and it created necessary con？dition for the quick burning of coal and coke. Through simulating the combustion effect of coal in the tuyere combustionzone, it conclude that along with the risen of oxygen concentration, the retention time of carbon grain became short. Whenthe oxygen concentration was 21%, the retention time of carbon grain was 0.205 s. When the oxygen concentration was30%, the retention time of carbon grain was 0.17 s.