Effects of Clean-air Injection on Particle-separation Performance of Novel Cyclone with Sintered Metal Cone and its Application

对一种新型的多孔烧结金属锥体旋风分离器与传统的丙烯酸树脂锥体旋风分离器的性能进行了比较。提出了一种通过多孔锥体控制喷射清洁空气来控制切割尺寸和减少粉末沉积的新方法，实验中，当不通过多孔锥体喷射清洁空气时，多孔锥体的切割尺寸和粉末沉积量大于丙烯酸树脂锥体。然而，通过多孔圆锥体引入足够的清洁空气，同时减少了切割尺寸和粉末沉积到小于传统圆锥体。修正后的水平流模型表明，这是因为注入的清洁空气通过降低表面的表观摩擦系数提高了锥体表面附近流体的切向速度。

The performance of a novel cyclone separator with a cone made of porous sintered metal was compared with that of a conventional design with a cone made of acrylic resin. Controlled injection of clean air through the porous cone is proposed as a new method to control the cut size and reduce powder deposition on the cone.In the experiments, when clean air was not injected through the porous cone, the cut size and the amount of powder deposited on the porous cone were greater than for the acrylic resin cone. However, the introduction of adequate clean air through the porous cone simultaneously reduced the cut size and the powder deposition to less than those with the conventional cone. The revised horizontal-flow model revealed that this occurred because the injected clean air enhanced the tangential velocity of the fluid near the cone surface by reducing the surface's apparent friction factor.