Flow of filter granules in moving granular beds with louvers and sublouvers

Filtration of dust particulates using a new filter system with louvers and sublouvers

“…The filter bed had the following dimensions: 1070 mm high; 380 mm wide; and 500 mm deep. The modified granular bed filter design was adopted based on the quasi 2D design of Hsiau et al [25] and Smid et al [26]. The choice of a moving granular bed filter with louvers and sublouvers for this study was based on its advantages over other granular bed filters for the current application, one of which is its simplicity.…”

“…1). The sublouvers were used to diminish the occurrence of stagnant zones in the filter granules along the louvers [25]. The dust-laden gas passed horizontally through the granular layer.…”

“…In this study, we designed a louver-walled apparatus with a series of sublouvers which is very helpful for diminishing the stagnant zones among the filter granules [25,26]. This is an effective method for the removal of dust particulates from a dusty gas passing through the moving granular bed filter.…”

Filtration of dust particulates with a moving granular bed filter

“…Moreover, the particulate matters are attached to the filter granules moving in the filter which could be cleaned and regenerated for continuous operation purpose. In recent studies related to granular bed filter technology, the focus has been on the mode of the bed movement which allows the regeneration of the filter granules [5][6][7][8][9][10][11][12][13][14][15]. The depth and the surface filtration mechanisms are two main factors affecting filtration in moving granular bed filters.…”

Study of Flow Patterns in Two-Stage Mode of Moving Granular Bed Filter

“…These flow behaviors and velocity profiles were found not only during experimental tests but had also been simulated by . In further research, Hsiau et al (2008) and Smid et al (2009) successfully developed and optimized a moving granular bed with a louversublouver system to diminish most stagnant zones. However, only mono-sized coarse sands were focused as the filter granules in studies mentioned above.…”