# Study on the Influence of Dust Removal Fan Structure Parameters on Dust Removal Performance
## 5 Discussion  
In this paper, the CFD method was used to analyze the influence of structural parameters of wet dust removal fans for mining on dust removal performance, leading to the following conclusions:  
1. After the airflow passes through the swirl guide vane of the dust removal fan, there will be obvious swirling flow in the exit section of the dust removal fan. Due to the action of centrifugal force, a large amount of dust is collected on the side wall of the exit section.
2. With the increase in the number of driving impeller blades, the total pressure efficiency, static pressure efficiency, and dust removal efficiency of the dust removal fan will decrease.
3. When the driving impeller blade adopts C-4 airfoil, the total pressure efficiency and static pressure efficiency of the dust removal fan are higher but the dust removal efficiency is lower than that of the same thickness circular plate airfoil.
4. With the increase in the number of driven impeller blades of the dust removal fan, the driven impeller speed, total pressure efficiency, static pressure efficiency, and dust removal efficiency gradually decrease.
5. Adding the rear guide vane structure can improve the total pressure efficiency and static pressure efficiency of the dust removal fan but will reduce the dust removal efficiency of the dust removal fan. The total pressure efficiency and static pressure  
Figure 19: Influence of lengthening outlet section of dust removal fan on dust removal performance. (**a**) Outlet section lengthening—total pressure efficiency; (**b**) outlet section lengthening—total pressure efficiency; (**c**) outlet section lengthening—dust removal efficiency.  
efficiency of the dust removal fan will be reduced by adding the swirl guide vane structure, but the dust removal efficiency will be significantly improved.
* The extension of the outlet section of the dust removal fan will reduce the total pressure efficiency and static pressure efficiency of the dust removal fan but the dust removal efficiency will increase.  
Conceptualization, [PERSON]; methodology, [PERSON]; validation, J.Z.; formal analysis, G.G.; investigation, J.Z.; resources, G.G.; writing--original draft preparation, J.Z.; writing--review and editing, G.G. and X.G.; funding acquisition, G.G. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the Shanxi Province Key Research and Development Project, grant number 202102100401004 (Project title: Research on Inspection Robot under Complex Conditions of Underground Mine based on Domestic Loongson Control), and the Shanxi Province Science and Technology Cooperation and Exchange Project, grant number 202104041101005 (Project title: Research on Key Technology of Automatic Silting Robot for Underground Water Silo).  
Not applicable.  
The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.  
The author would like to thank [PERSON] of Shanxi Anrui Fan Electric Co., Ltd. for providing the physical objects and drawings of the wet dust removal fan for mining and [PERSON] of China Coal Technology and Engineering Group Taiyuan Research Institute Co., Ltd. for providing the performance test device of the dust removal fan for his help in the test process.  
The authors declare no conflicts of interest.