基于双旋流形式的烧结燃烧器结构优化

纯烧高炉煤气烧结燃烧器存在燃烧不稳定和脱火现象,降低了高炉煤气的燃烧效率。为了解决上述问题,提出一种新型双旋流燃烧器,模拟了该燃烧器内部的燃烧流动规律,并分析了双旋流形式对燃烧性能的强化效果。结果表明,模型可准确预测烧结料面处的温度分布,与现场实测数据的平均误差为5.3%;双旋流燃烧器可有效提升高炉煤气的燃烧效率,相比同工况下的单旋流燃烧器,其料面温度提高140 ℃,CO未燃率降低15.9%。研究结果可为现有烧结设备的性能提升和节能改造提供一种有效途径。

Structure optimization of sinter burner based on twin-swirl form

The combustion instability and deflagration of pure blast furnace gas sintering burner would reduce the combustion efficiency of blast furnace gas. In order to solve above problems, a new type of twin-swirl burner was proposed. The combustion flow law inside the burner was simulated, and the enhancement effect of the double-swirl burner on the combustion performance was analyzed. The results showed that the model can accurately predict the temperature distribution at the sintering surface, and the average error between the model and the field measured data was only 5.3%. The twin-swirl burner can effectively improve the combustion efficiency of blast furnace gas. Compared with the single swirl burner under the same working condition, the feed surface temperature was increased by 140 ℃ and the CO non-combustion rate was decreased by 15.9%. The results can provide an effective way for the performance improvement and energy-saving transformation of sintering equipment.