Study On Performance Of Multi-effect Cyclone Separator

Multi-Effect Cyclone Separator is a brand-new cyclone separator. By means of two stages of helical pipe, helical top cover, stabilizing cone and suction tube system, it increases the collection efficiecy of micron and sub-micron particles.In this paper, large-scale commercial CFD software FLUENT6.2 was used in the numerical simulation of its flow field and particle trajectory. RSM model was used in the simulation of continuous phase and stochastic trajectory model was used in the simulation of particle trajectory. The results of simulation of continuous phase showed that flow field distribution was symmetry. Tangential velocity distribution was bilateral symmetry. Its distribution map was like M. Central gas did not flap, which was not like Lapple cyclone separator. The results of simulation of particle trajectory showed that large particles quickly fell into the lower part of separator and were separated. A part of the small particles followed the airflow in the separator until flew out and escaped.Separation performance and drag performance were studied by experiment. The results of studying on separation performance showed that the collection efficiency of particles 0.1～3μm was more than 90%, and collection efficiency of particles more than 5μm was more than 97%, and the pressure drop was 500～1100 Pa while inlet gas velocity was 10～14 m/s for the test equipment with diameter of 0.25 m. When inlet gas velocity was over 16m/s, the collection efficiency is more than 75% for particles 0.1～1μm. Multi-Effect Cyclone Separator was separated into three parts to study its drag performance. The results showed that within 5～30 m/s inlet gas velocity the drag coefficient was 7.29 for Multi-Effect Cyclone Separator with diameter of 0.25 m, 1.04 for the first stage of helical pipe, 1.73 for the second stage, and 4.52 for the cylinder. The drag coefficient of Lapple cyclone with diameter of 0.25 m was 7.21.