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通过基于有限体积法的竖炉内煤气流分布的混合两相流模型,对COREX竖炉安装AGD管道后的煤气流分布变化进行了三维数值模拟。模拟结果显示,安装AGD管道能降低竖炉的整体压差,提高竖炉的操作压力;增加竖炉下部煤气死区的体积,且并未改变竖炉上部中心1.0m半径范围内的煤气流速,仅提高了1/2半径处的煤气流速;AGD管道对煤气反窜有抑制效果,通过AGD管道进入竖炉的煤气约占56.88%;由围管导气孔进入的煤气主要集中在竖炉边缘及竖炉中心,AGD管道引入的煤气主要分布在其所在的垂直高度上,反窜煤气亦是通过竖炉中心上行。
By means of the mixed two-phase flow model based on the finite volume method and the gas flow distribution in the shaft furnace, the gas flow distribution changes after the installation of the AGD pipe in the COREX shaft furnace were simulated by three-dimensional numerical simulation. The simulation results show that the installation of AGD pipeline can reduce the overall pressure of the shaft furnace, increase the operating pressure of the shaft furnace, increase the volume of the dead zone in the lower shaft of the shaft furnace, and not change the gas flow rate in the radius of 1.0m above the center of the shaft furnace, Only increased the flow rate of gas at 1/2 radius; AGD pipeline has the effect of anti-channeling of gas, which accounts for 56.88% of the gas entering the shaft furnace through AGD pipeline; Shaft furnace center, AGD pipeline gas is mainly distributed in the vertical height where it is located, anti-channeling gas is also up through the center of the shaft furnace.