Effect of cone radius on the pulse-jet cleaning performance of double-layer filter cartridges (DL-FC)

Abstract

Recently, double-layer filter cartridges (DL-FCs) have been proposed to reduce incomplete cleaning. In this study, with the help of numerical simulation, the effect of cone radius (R) on the cleaning performance of DL-FCs was investigated by varying the radius. The results indicate that reducing the radius of the cone will expand the zones on the upper part of the DL-FC that have been under low-pressure for a long time. During the pulse-jet cleaning process, five vortexes are mainly generated on one side of the DL-FC. Vortex 1 has the most significant impact on the DL-FC. Vortex 1 not only causes the pressure in the area of the DL-FC near the baffle to be too small and in a low-pressure state for an extended period, but also makes the pressure curve of the measured points on the surface of the FC have a V-shape depression. The increase of the cone radius can improve the negative impact caused by Vortex 1 on the FC. In addition, the comprehensive pressure (PC) was introduced as an evaluation index for the pulse-jet cleaning performance of the FC. As the radius of the cone decreases from 100 mm to 20 mm, the comprehensive pressure of the DL-FC first increases and then decreases. In this study, when the distance of the top of the inner cone from the baffle H = 0 mm and cone radius R = 80 mm, the comprehensive pressure of the DL-FC is the highest. The overall comprehensive pressure of the outer filter cartridge (O-FC) and the DL-FC were improved by 92.3 % and 90.0 %, respectively.