Study on filtering characteristics of aerosol particulates in a powder-grain dual-layer granular bed

A New Approach of Dedusting for IGCC by a Two-Stage Moving Granular Bed Filter

“…Based on the vertical configuration of dual-layer GBFs, the collection efficiency was 1.3 times better than that of single-layer GBFs with particulate diameters of 1-10 μm [20]. These studies [14][15][16][17][18][19][20] showed that two-stage or multi-stage filters improve collection efficiency, increase dust loading, and offer acceptable pressure drops. However, these filters cause operational problems in long-term industrial applications [10] because prior studies have focused on the fixed-bed mode; limited studies have been dedicated to developing moving beds.…”

“…In addition, the collection efficiency was improved, and pressure drops were reduced [18]. With the powder-grain level, the combined dual-layer GBF demonstrated better collection efficiency (99.835%) than those of individual layers (96.240% and 89.905%) [19]. Based on the vertical configuration of dual-layer GBFs, the collection efficiency was 1.3 times better than that of single-layer GBFs with particulate diameters of 1-10 μm [20].…”

Effects of Temperature on the Filtration Characteristics of a Dual‐Layer Granular Bed Filter

“…A dual-layer granular bed filter thus achieves fine and coarse filtrations within a single system. In the experiments performed by Tian et al [20,21], the duallayer granular bed filter achieved a stable average outlet dust concentration of 3-7.5 mg m -3 and pressure drop of 2010-2040 Pa, based on an initial filtration velocity of 0.25 m s -1 and inlet dust concentration of 3.89-23.34 g m -3 . This shows that a dual-layer granular bed filter is capable of simultaneously achieving a high filtration efficiency and low pressure drop.…”