关键词: 旋风分离器, 双螺旋导流片, 效率, 压力降, 流场

Abstract: In order to improve the separation performance of the separator, a new type of cyclone separator with double helix guide is designed on the basis of PV cyclone. The efficiency, pressure drop and flow field of the traditional cyclone and the novel separator are compared by experiment and numerical simulation. The results show that the pressure drop of numerical simulation is in good agreement with the experimental, which verifies the correctness of the model and numerical method. The symmetry of the flow field in the novel separator is better than that in the traditional cyclone due to the symmetrical design of the double helix guide vane. The phenomenon of vortex core swing and twist is basically eliminated, which is beneficial to weaken the backmixing phenomenon of particles in the cone and ash hopper. In the double helix guide cyclone separator,the height of the cylinder section of the separator is increased and the residence time of gas flow and particles is greatly increased, which is conducive to the separation of particles. At the same inlet gas velocity, the pressure drop of the double helix guide separator is more than 20% lower than that of the traditional cyclone, and the energy loss is reduced. The separation efficiency of the double helix guide separator is obviously higher than that of the traditional cyclone at higher treatment gas flow.

Key words: cyclone separator, double helix guide vane, efficiency, pressure drop, flow field