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通过对传统浓密机进料井结构进行研究,提出了一种结构简单、便于改造的新型浓密机进料井结构。采用计算流体力学的方法对新型进料井结构的内部流场进行了数值模拟,研究了进料井内的迹线分布、出口平面固相体积分数分布和速度分布。结果表明,新型浓密机进料井结构在不同的进料速度下,能够有效耗散进料悬浮液的动能,均匀分布物料。该结构可使物料从进料井的各个方向与径向呈一定角度流出,延长了物料到达溢流堰的时间,溢流液澄清度高,提高了分离效果。新型进料井结构不需要提高任何外动力,节约能耗,在工业上有较大的应用价值。
Through the research on the structure of the traditional thickener feed well, a new thickener feed well structure with simple structure and easy modification is proposed. The internal flow field of a new type of feed well was numerically simulated by computational fluid dynamics (CFD). The trace distribution in the feed well and the volume fraction distribution and velocity distribution in the outlet plane were studied. The results show that the new thickener feed well structure can effectively dissipate the kinetic energy of the feed suspension and distribute the material evenly at different feed rates. The structure can make the material flow out from the direction of the feed well at an angle with the radial direction, prolonging the time that the material reaches the weir, and the overflowing liquid has a high degree of clarity and improves the separation effect. New feed well structure does not need to improve any external power, saving energy consumption, in the industry has greater application value.