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以COREX熔化气化炉物理模型为基础,对高速摄影仪记录的回旋区颗粒运动情况进行分析得到模型观察面上回旋区的颗粒速度场,运用分形方法对回旋区内不规则边界的表面积进行研究。结果表明:不同条件下,回旋区内表面边界的分维数变化不大;回旋区内表面积随着风量的增大而增大,当吹气量由106 m3/h变为122 m3/h时,回旋区表面积突增;回旋区内表面积随着床层高度的增大而减小,床层高度从200 mm变为250 mm,回旋区表面积变化较小,床层高度到达350 mm后,回旋区内表面积变化不大;回旋区内表面积随着排料速度的增加而增大。
Based on the COREX melting gasifier physical model, the particle velocity field in the convolution zone recorded by the high-speed camera was analyzed. The fractal method was used to study the surface area of the irregular boundary in the convolution zone . The results show that under different conditions, the fractal dimension of the inner surface of the convolution region has little change. The inner surface area of the convolution region increases with the increase of the air volume. When the air volume changes from 106 m3 / h to 122 m3 / h, The surface area of the convolution area suddenly increased; the inner surface area of the convolution area decreased with the increase of the bed height; the height of the bed changed from 200 mm to 250 mm; the surface area of the convolution area changed little; when the height of the bed reached 350 mm, The internal surface area changes little; the inner surface area of the rotating area increases with the increase of discharge speed.