# Study on the Influence of Dust Removal Fan Structure Parameters on Dust Removal Performance
## 4 Numerical Simulation Results and Analysis  
### Simulation Cloud Image Analysis  
Without altering the structural parameters of the dust removal fan, the numerical simulation cloud image of the original dust removal fan model was analyzed. Initially, an axial section was established in the YZ plane of the model, and the position of the axial section is illustrated in Figure 9.  
The velocity flow diagram of the dust removal fan model obtained by numerical simulation is shown in Figure 10.  
From the flow diagram of the dust removal fan, it is evident that the air velocity inside the dust removal fan accelerates noticeably after passing through the driving impeller, with the maximum velocity point near the tip of the driving impeller. As the air proceeds through the swirl guide vane, an evident swirling flow is generated in the exit section of the dust removal fan. This swirling flow increases the likelihood of the dust and liquid drop mixture colliding with the side wall of the dust removal fan, thereby aiding in improving the dust removal effect. The static pressure cloud image of the entire dust removal fan model and the axial section of each impeller region obtained by numerical simulation are shown in Figure 11.  
From the static pressure cloud image of the axial section of the dust removal fan, it is evident that the static pressure value increases significantly after the airflow passes through the driving impeller blade. The point of maximum static pressure value is located on the lee side of the driving impeller blade, indicating that the blade structure of the driving impeller has the greatest influence on the internal flow field of the dust removal fan. Additionally, when the airflow passes through the rear guide vane and the swirl guide vane, there are also points with large static pressure values on the axial section static pressure cloud image, indicating that the rear guide vane and the swirl guide vane also have a significant influence on the flow field inside the dust removal fan. The dust concentration cloud image of the entire dust removal fan model and the axial section of each impeller region obtained by numerical simulation are shown in Figure 12.  
Figure 10: Velocity flow diagram of dust removal fan model. Figure 9: Axial section position diagram. Figure 11: Static pressure cloud image of axial section of dust removal fan model. (**a**) Dust removal fan overall area; (**b**) driven impeller area; (**c**) driving impeller area; (**d**) outlet section area. Figure 12: _Cont._  
From the dust concentration cloud image of the axial section of the dust removal fan, it can be observed that the point with the highest dust concentration is located near the hub of the driving impeller. Additionally, there is a point with a higher dust concentration near the hub of the driven impeller. This indicates that the dust particles are unevenly distributed before passing through the driving impeller blade, and the distribution begins to become uniform after passing through the driving impeller blade. As the centrifugal force acting on the dust particles increases, their collision with the side wall of the outlet section of the dust removal fan intensifies, leading to a decrease in dust concentration. Figure 13 depicts the cloud image of dust concentration on the side wall of the entire dust removal fan model and each impeller region obtained through numerical simulation. Figure 12: Dust concentration cloud image of axial section of dust removal fan model. (**a**) Dust removal fan overall area; (**b**) driven impeller area; (**c**) driving impeller area; (**d**) outlet section area. Figure 13: Dust concentration cloud image on the side wall of dust removal fan model. (**a**) Dust removal fan overall area; (**b**) driven impeller area; (**c**) driving impeller area; (**d**) outlet section area. As evident from the cloud image of dust concentration on the side wall of the dust removal fan, the distribution of dust concentration on the side wall of the driven impeller region is highly uneven.