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为了系统评价导向叶片结构对输气站场用旋风管分离性能的影响,计算模拟了叶片数量为3~15、叶片厚度为2~12 mm的弧形、梭形、楔形3种不同叶片形状下旋风管的分离效率和压降。结果表明:旋风管的压力和切向速度均沿轴线对称分布,中心涡核处的压力最低,而叶片出口处的切向速度最大为18 m/s;随叶片数量的增加,旋风管的分离效率和压降增大,当叶片数量大于4时分离效率的增长较缓慢,但均能除尽粒径大于4μm的颗粒,而增加一个叶片导致压降增加2 000 Pa;叶片厚度增加,分离效率和压降增大,尤其是对粒径为1.5μm的颗粒,旋风管的分离效率从2 mm的44.18%增加到12 mm的96.17%;楔形叶片旋风管的分离效率最大,可除尽粒径大于3μm的颗粒,压降也最大,比弧形叶片约增加4 500 Pa。
In order to systematically evaluate the effect of the guide vane structure on the separation performance of the cyclone tube used in the gas station, three kinds of blade shapes, arc, fusiform and wedge, with the blade number of 3-15 and the blade thickness of 2-12 mm were simulated. Cyclone separation efficiency and pressure drop. The results show that both the pressure and the tangential velocity of the cyclone pipe are symmetrically distributed along the axis, and the pressure at the center of the vortex core is the lowest, while the tangential velocity at the exit of the blade is 18 m / s. With the increase of the blade number, the separation of the cyclone pipe The efficiency and pressure drop increase. When the number of leaves is more than 4, the separation efficiency increases more slowly, but all the particles with diameters larger than 4 μm can be removed. However, the increase of pressure drop by 2 000 Pa due to one additional blade increases the leaf thickness and separation efficiency And the pressure drop increases, especially for the particles with the diameter of 1.5μm, the separation efficiency of the cyclone tube increases from 44.18% of 2 mm to 96.17% of 12 mm; the separation efficiency of the wedge-shaped blade cyclone tube is the maximum, Particles larger than 3 μm also have the largest pressure drop, about 4 500 Pa more than the curved blade.