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为了弄清炉型对冲天炉内气流分布的影响,拟订了三种测试散料层内气流速度分布的方法,即(1)富尔纳斯—舒曼法,(2)给热系数直接测定法与(3)流网法。本文讨论了各种方法的优缺点并列出了各种方法对三种炉型(直筒型、高炉型与灯罩型)的试验结果.试验结果说明从各截面上气流分布来看高炉型最为均匀,从整个料层内流速平均值来看,由于上下部分料层的衬偿作用,以灯罩型为最佳.直筒型内,由于边缘气流不断发展,气流分布最不均匀。这三种方法虽然各自皆可得到稳定可重复的数据,因理论上皆有一定缺陷,结论尚不十分统一,工作尚待进一步深化。
In order to understand the influence of furnace type on the airflow distribution in the cupola, three methods for testing the velocity distribution of the air in the bulk layer have been developed: (1) Furnas-Schumann method, (2) direct measurement of the heat transfer coefficient Law and (3) flow network method. In this paper, the advantages and disadvantages of each method are discussed and the results of the tests on three types of furnaces (Straight, Blast Furnace and Lampshade) are listed. The results show that the blast furnace is the most uniform From the average velocity of the material in the entire material layer, due to the upper and lower part of the material lining compensation effect, the lamp shade type is the best straight type, due to the continuous development of the edge of the air flow, the most uneven distribution of air. Although each of the three methods can obtain stable and repeatable data, there are some defects in theory, and the conclusions are not yet very unified. The work needs to be further deepened.