This paper proposes a new type of gas cyclone separator, which nests an inner cyclone with a double-spiral inlet in an outer cyclone. Experiments were conducted to compare the separation performance of the new cyclone to that of the traditional Lapple cyclone. In addition, the flow fields and the particle collection in the two cyclones were simulated by the computational fluid dynamics (CFD) and compared. Compared with the traditional Lapple cyclone, the new double cyclone can present significantly improved collection efficiency, resulting from the two-stage separation and better symmetry of the flow field. On the other hand, the pressure drop of the new cyclone was only slightly elevated because of the low velocity in the outer cyclone. Moreover, this new double-stage cyclone separator can be further developed for particle classification, as the particles collected in the three outlets of the cyclone are in different size ranges.

本文提出了一种新型的气体旋风分离器，该气体旋风分离器将一个内部旋风分离器与一个双螺旋进气口嵌套在一个外部旋风分离器中。进行了实验以比较新型旋风分离器与传统Lapple旋风分离器的分离性能。此外，通过计算流体动力学（CFD）对两个旋风分离器中的流场和颗粒收集进行了模拟，并进行了比较。与传统的Lapple旋风分离器相比，新型双旋风分离器具有两级分离和更好的流场对称性，可以显着提高收集效率。另一方面，新的旋风分离器的压降由于外部旋风分离器的低速而仅略微升高。此外，这种新型双级旋风分离器可以进一步开发用于颗粒分类，