采用离散相模型对新OG系统高效喷淋塔入口段及主体段喷嘴的布置方式进行数值模拟，考察了喷嘴喷射方向和喷淋层数对雾化场气流分布和降温效果的影响。结果表明，喷嘴的喷射方向和塔内的喷淋层数对雾化场的气流分布和降温效果影响较大；喷淋塔入口段采用逆流喷射时，出口截面的速度分布最均匀且降温效果最好；高效喷淋塔的主体段的喷淋层数为5时，塔内烟气的速度流场较均匀，且中心区域的气流速度为2~4 m/s，有助于延长气体与液滴的作用时间；随喷淋层数增加，塔内温度梯度变化增大，水蒸气质量分数分布与温度分布对应，塔内的平均湍动能逐渐增高。
The nozzle layout of the high efficient spray tower in OG (Oxygen Converter Gas Recovery) system of the primary dedusting for the converter has an important role on the cooling effect and operating reliability of the spraying system. The discrete phase model was used to simulate the nozzle layout of the high efficiency spray tower. The nozzle layouts of the inlet and main section of the high efficiency spray tower were discussed, and the influence of the nozzle direction and the number of spray layers on the air distribution and cooling effect in the atomizing field were also analyzed. The results showed that the spraying direction of the nozzle and the number of spray layers in the tower had great influence on the air distribution and cooling effect of the atomization field. When the inlet section of the spray tower adopted countercurrent injection, the velocity distribution of the outlet cross section was the most uniform and the cooling effect was the best. When the number of spray layers in the main section of the high efficiency spray tower was five, the flow field of the flue gas in the tower was relatively uniform, and the velocity in the center area was in the range of 2~4 m/s, which helped to increase the time of interaction between gas and droplets. With the increase of the number of spray layers, the temperature gradient in the tower also increased and the distributions of water vapor mass fraction and temperature correspond to each other, and then the average turbulent energy in the tower also gradually increased. Through the above research, the reasonable arrangement of nozzle in the high efficiency spray tower was obtained. The results can provide a theoretical basis for the optimization and improvement of the high efficiency spray tower in the new OG system.
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