# Study on the Influence of Dust Removal Fan Structure Parameters on Dust Removal Performance
## 3 Numerical Simulation Scheme of Dust Removal Fan
### Comparison of Simulated and Experimental Values  
To verify whether the numerical simulation results can reflect the actual working condition of the dust removal fan, we used the test system of the C-shaped conical inlet pipe intake fan to test the dust removal fan. The schematic diagram, test apparatus, and test bench of the C-type pipeline intake test device are illustrated in Figure 6. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Number of Grid** & \begin{tabular}{c} **Minimum Cell** \\ **Quality** \\ \end{tabular} & \begin{tabular}{c} **Maximum Aspect** \\ **Ratio** \\ \end{tabular} & \
\begin{tabular}{c} **Minimum** \\ **Orthogonal Mass** \\ \end{tabular} &
\begin{tabular}{c} **Maximum Skew** \\ **Tetrahedral Fold** \\ \end{tabular} \\ \hline (Error limit) & \(5\times 10^{-4}\) & 1000 & \(5\times 10^{-3}\) & 0.999 & \(1\times 10^{-3}\) \\
1,894,317 & 0.104 & 18.799 & 0.067 & 0.933 & 0.085 \\
2,027,718 & 0.163 & 11.195 & 0.075 & 0.925 & 0.128 \\
2,225,859 & 0.163 & 11.118 & 0.115 & 0.885 & 0.128 \\
2,536,249 & 0.163 & 10.854 & 0.075 & 0.925 & 0.128 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Comparison of mesh quality of four sets of mesh models. Figure 5: The relationship between the number of grids and the simulation value of total pressure. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Number of** & \begin{tabular}{c} **Volume Flow** \\ **Rate/(m\({}^{3}\)/min)** \\ \end{tabular} & \begin{tabular}{c} **Total** \\ **Pressure/Pa** \\ \end{tabular} & \begin{tabular}{c} **Static Pressure** \\ **/Pa** \\ \end{tabular} & \begin{tabular}{c} **Driving** \\ **Impeller Shaft** \\ **Power/kW** \\ \end{tabular} & \
\begin{tabular}{c} **Total Pressure** \\ **Efficiency/\%** \\ \end{tabular} &
\begin{tabular}{c} **Static Pressure** \\ **Efficiency/\%** \\ \end{tabular} \\ \hline
1,894,317 & 395.853 & 1525.37 & 1205.95 & 20.445 & 49.22 & 38.91 \\
2,027,718 & 395.853 & 1530.77 & 1210.96 & 20.459 & 49.36 & 39.05 \\
2,225,859 & 395.853 & 1534.19 & 1214.31 & 20.463 & 49.46 & 39.15 \\
2,536,249 & 395.853 & 1535.56 & 1215.13 & 20.466 & 49.49 & 39.17 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Comparison of simulation results of dust removal fan models with four grid numbers. Firstly, the dust removal performance of the dust removal fan was tested. The chosen test material was standard dust with particle sizes ranging from 3 to 20 \(\upmu\)m. The dust concentration at the inlet and outlet was measured using a handheld dust concentration tester to calculate the dust removal efficiency. Following the test, the dust removal efficiency of the dust removal fan was found to be 85.44% when the air volume was 396.309 m\({}^{3}\)/min. The test process is illustrated in Figure 7.  
Figure 6: Dust removal fan test device. (**a**) Diagram of C-type pipeline intake test device; (**b**) installed test device; (**c**) test bench. Figure 7: Dust removal performance test. Then, parameters of different working conditions were obtained by adjusting the air volume at the cone inlet of the dust removal fan. The test results under four groups of different inlet air volumes were obtained from the data collected during multiple working conditions measured by the test system. The corresponding air volume of each group was converted into the inlet speed of the dust removal fan, and the dust removal fan model was set to the inlet speed for numerical simulation. Four groups of numerical simulation results under different inlet speeds were obtained.