Experimental Research On The Dust Hopper Structure Of Cyclone Separator

In this paper, there are two methods used to improve the dust hopper structure of cyclone separator. The first one is to attaches a slotted vertical tube on the dust outlet, and the second one is to change the diameter and height of the dust hopper so as to find out their best matching value. The experimental results proved that the first method can not improve the performance of the cyclone separator. The dimensional optimization experiment was carried on a standard PV type cyclone separator and a PV type cyclone separator with gas outlet structure optimized. The results showed that the optimal dust hopper diameter was 0.7～0.75 times the cyclone diameter, and the optimal dust hopper length was 1.2～1.5 times the height of the dust hopper. These optimal dimensions have no effect on the pressure drop of cyclone separator.Compared with the standard PV type cyclone separator, the cyclone separator with dust hopper structure optimized can improve the comprehensive efficiency factor by 14%～18% . Also the performance of the optimized structure cyclone is more stable, not influenced by the change of the operating condition and other parts of configuration size of the cyclone separator.Through the observation of the flow field in the dust hopper, the upper dust ring and secondary flow were found in the dust hopper, which were harmful to the separate efficiency. The height of the upper dust ring was approximately 50mm～70mm. According to the former research of the flow field, the generating mechanism of the optimal bin structure was preliminarily analyzed as well in this dissertation.