Research On Optimization Of Cyclone Separator Performance

Predecessors have done a lot of research work on optimization of cyclone Separator performance, and gotten a lot of experiences and conclusions. Research of this subject is based on the conclusions which predecessors got from previous studies as the theoretical basis. The research model is single and tangential import cyclone separator with a plus direct tube at the bottom of cone structure, and the object of research is the diameter (Dd) of the tube. The thesis simulates three-dimensional flow fields of three different models in CFD software. For the gas and particle flow field, the respective simulation methods are Reynolds Stress Model (RSM) and Discrete Phase Model (DPM).The research results indicate:The flow field distribution of single and tangential import cyclone separator is asymmetrical. The trail of the vortex flow drifts in straight tube space, and the drifting amplitude reduces with the Dd increases. The flow rate at hopper inlet is not zero, and it increases with the Dd increases. But Too much gas flow into the hopper will cause that the collected particles are re-rolled back to the flow field, reducing the separation efficiency. Additional straight tube will make trailing vortex introduced to the straight tube section, which can provide a chance of secondary separation for particles, enhancing the separation efficiency. In this research the role of secondary separation on the separation occupies a dominant position, and as Dd increasing, the separation efficiency increase, rather than reducing with the tangential velocity decreasing slightly in the spatial separation. Separation efficiency doesn't increases all the time with Dd increasing, but exist a best Dd which makes the separation efficiency of cyclone separator highest.