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重介质旋流器是一种使用广泛的高效选煤设备,旋流器内部空气柱的大小对旋流器分选效率及能耗影响显著。利用FLUENT研究了重介质旋流器的结构和工艺参数对空气柱的影响。结果表明,在入料速度超过临界速度后,旋流器内部形成完整的空气柱,其大小与入料速度没有关系;空气柱直径在溢流口附近最大,在溢流管插入位置最小;重介质悬浮液的黏度越大,空气柱越小,能耗越小;溢流管插入深度越大,空气柱越大,能量耗散越大。
Heavy medium cyclone is a widely used and efficient coal preparation equipment. The size of the air column inside the cyclone has a significant impact on the efficiency and energy consumption of the cyclone. FLUENT was used to study the structure and process parameters of the HM cyclone on the air column. The results show that after the feed rate exceeds the critical speed, a complete air column is formed inside the cyclone. The size of the air column has no relation with the feeding speed. The diameter of the air column is the maximum near the overflow port and the minimum in the overflow pipe. The weight The greater the viscosity of the medium suspension, the smaller the air column, the smaller the energy consumption; the greater the insertion depth of the overflow tube, the larger the air column, the greater the energy dissipation.