## 2 Materials and Methods
### Place and Conditions of Conditioned of Filter Materials
#### 2.2.1 Production Lines  
A Line for Processing Narrow Surfaces of Furniture Panels  
The processing of narrow surfaces is used for formatting and veneering furniture panels with rectilinear shapes. The processing takes place on two lines (main and auxiliary), where the machines performing processing operations related to the formation of fine dust waste are connected to one filtering installation. Chipboard, fibreboard and solid wood are processed on the main line. The diagram of the line with the dust extraction pipeline is shown in Figure 1. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Parameter**} & \multirow{2}{*}{**Unit**} & \multicolumn{4}{c}{**Parameter Value**} \\ \cline{3-5}  & & \multicolumn{2}{c}{**Dust Extraction Installation in the**} & \multicolumn{2}{c}{**Dust Extraction Installation in the**} \\  & & \multicolumn{2}{c}{**Processing Line of Narrow Surfaces**} & \multicolumn{2}{c}{**Line of Drilling Centers**} \\ \hline Factory installation identification & & Main pipeline & Auxiliary pipeline & Main pipeline & Auxiliary pipeline \\ Factory labeling of the filter & & Filter No. 1—SBF-140-5.05-1A & Filter No. 2—SBF-160-5.05-1A \\ Pipeline length & m & 144.3 & 34.4 & 120 & 99 \\ Air velocity in the pipeline & m\(\cdot\)s\({}^{-1}\) & 24 & 2.5 & 26 & 24 \\ Air demand & m\({}^{3}\cdot\)h\({}^{-1}\) & & 55,450 & & 26,600 & 33,250 \\ Fan type & & & JK-90 MT (1 pcs) & & \\ Fan efficiency & m\({}^{3}\cdot\)h\({}^{-1}\) & & & 60,000 & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Basic technical parameters of filtration installations. The stages of processing panels on the main narrow surface processing line are as follows:  
1. Longitudinal cutting of the block--a four-element block is cut into two two-element ones, cutting with the use of the FL module (longitudinal saw). Feed 35 m\(\cdot\)min\({}^{-1}\);
2. Formatting from the width--cutting with a circular saw with the simultaneous alignment of longitudinal, narrow surfaces and veneering. Feed 35 m\(\cdot\)min\({}^{-1}\);
3. Formatting panels from length and processing short, narrow surfaces. Alignment and veneer. Feed 15 m\(\cdot\)min\({}^{-1}\);
4. Multi-spindle through-feed drilling machines--drilling holes in wide surfaces of panels;
5. Longitudinal cut--a two-piece block is cut into two ready-made panels. Cutting with a rip saw. Feed 35 m\(\cdot\)min\({}^{-1}\). Narrow panels of furniture joints are processed in an auxiliary, one-sided narrow surface processing line. This line is used for processing narrow panels for which the double-sided line is not suitable due to design constraints. The technological process of furniture panels on this line is as follows:  
1. Manual loading of panels. 2. Processing the first narrow longitudinal surface and veneering. Feed 20 m\(\cdot\)min\({}^{-1}\). \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Parameter**} & \multirow{2}{*}{**Unit**} & \multicolumn{2}{c}{**Parameter Value**} \\ \cline{3-4}  & & **Filter No.** & **Filter No.** \\  & & **1—SBF-140-5,05-1A** & **2—SBF-160-5,05-1A** \\ \hline Number of bags & pcs & 140 & 162 \\ Bag length & m & & 4.68 \\ Bag diameter & m & & 0.15 \\ The area of the working surface of the bag & m\({}^{2}\) & & 2.205 \\ Total working surface area of the bags in the filter & m\({}^{2}\) & & 313.166 \\ Air demand in the installation & m\({}^{3}\).h\({}^{-1}\) & 55,450 & 59,850 \\ Filtration velocity & cm\(\cdot\)s\({}^{-1}\) & 4.918 & 4.653 \\ The amount of waste generated during processing (wood dust) & kg\(\cdot\)h\({}^{-1}\) & 250 & 100 \\ Average particle size & \(\mu\)m & 140.88 & 168.64 \\ Dust load & g\(\cdot\)m\({}^{-3}\) & 4.509 & 1.671 \\ The interval between the regeneration pulses for one bag & s & 606 & 690 \\ The number of changes in the work of the bag during the day & changes & 3 & 3 \\ Estimated number of regenerative impulses per day & pcs & 143 & 125 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Basic technical parameters of the filter baghouses.