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首页> 外文期刊>Journal of Iron and Steel Research International >Gas Flow Distribution in Pelletizing Shaft Furnace
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Gas Flow Distribution in Pelletizing Shaft Furnace

机译：球团炉的气流分布

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摘要

Through thermal test, cold state experiment, analysis and simulation of thermal process, the gas flow distribution in pelletizing shaft furnace (PSF) was discussed. The results show that there are five flowing trends; a-mong them, the downward roasting gas and the upward cooling gas are the most unsteady, which influence flow distribution greatly. Among the operating parameters, the ratio of inflow is a key factor affecting the flow distribution. The roasting and cooling gases will entirely flow into the roasting zone and internal vertical air channels (IVAC) , respectively, if the ratio of inflow is critical. From such a critical operating condition increasing roasting gas flow or decreasing cooling gas flow, the roasting gas starts flowing downwards so as to enter the inside of IVAC; the greater the ratio of inflow, the larger the downward flowrate. Among constructional parameters, the width of roasting zone b_1 , width of IVAC b_2 and width of cooling zone b_3 , and the height of roasting zone h_1 , height of soaking zone h_2 and height of cooling zone h_3 are the main factors affecting flow distribution. In case the ratio of b_2/b_1, or h_3/h_2, or h_1/h_2 is increased, the upward cooling gas tends to decrease while the downward roasting gas tends to increase with a gradual decrease in the ratio of inflow.
机译：通过热试验，冷态实验，热过程分析和模拟，对造粒竖炉（PSF）中的气流分布进行了讨论。结果表明，存在五种流动趋势。其中，向下的焙烧气和向上的冷却气最不稳定，极大地影响了气流的分布。在运行参数中，流入比例是影响流量分布的关键因素。如果流入比例很关键，则烘烤气体和冷却气体将分别完全流入烘烤区域和内部垂直空气通道（IVAC）。在这样的临界运行条件下，由于增加了烘烤气体的流量或减少了冷却气体的流量，烘烤气体开始向下流动，从而进入IVAC内部。流入比率越大，向下流量越大。在结构参数中，烘烤区b_1的宽度，IVAC b_2的宽度和冷却区b_3的宽度以及烘烤区h_1的高度，均热区h_2的高度和冷却区h_3的高度是影响流动分布的主要因素。在b_2 / b_1或h_3 / h_2或h_1 / h_2的比率增加的情况下，随着流入比率的逐渐减小，向上的冷却气体倾向于减少而向下的烘烤气体倾向于增加。

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