Granular bed filters

Seville, Jonathan; Clift, Roland

doi:10.1007/978-94-009-1451-3_9

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Such filters were already in the experimental study for collecting micron- and submicron-sized dust particulates from syngas in the integrated gasification combined cycle. According to the movement of the collector particles, the granular bed was divided into two different modes of operation; the fixed bed and the moving bed . The fixed bed granular filter has been widely researched, and it was found that its performance was affected by the gas velocity, the inlet dust concentration, the collector particles size, the thickness of the filter layer, and so on.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Swirl Space Ratio on the Performance of a Coupling Cyclone with a Built-In Granular Bed Filter: An Experimental Examination

Chang

Dao-ming

Gao

et al. 2020

Ind. Eng. Chem. Res.

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The gas–solid separator of coupling cyclone with a built-in granular bed filter (GBF) was proposed to capture dust emitted from the industrial source. The coarse dust was separated by the rotatory motion, and the fine dust entrained by the swirl was collected by the GBF. A new geometrical parameter, named as the swirl space ratio, was introduced to characterize the mutual impacts on the coupled separator. Experimental results showed that the pressure drop decreased 10% when the swirl space ratio increased from 0.37 to 0.43, while the collection efficiency was enhanced significantly. The coupled separator with a large swirl space ratio exhibited excellent separation characteristics according to the separation quality factor. Furthermore, the contribution ratio of the cyclone shell was strengthened by increasing the swirl space ratio. The variation in the bed voidage and the pressure drop was completely opposite. The breakage phenomenon was observed in the circulation of the collector particles.

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Section: Introductionmentioning

confidence: 99%

Effects of the Swirl Space Ratio on the Performance of a Coupling Cyclone with a Built-In Granular Bed Filter: An Experimental Examination

Chang

Dao-ming

Gao

et al. 2020

Ind. Eng. Chem. Res.

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The Flow Patterns and Wall Stresses in a Louvered‐Wall Moving Granular Filter Bed of Quartz Sand

Chou

Chen

2004

Part & Part Syst Charact

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The flow patterns and wall stresses in a two‐dimensional louvered moving granular filter bed of quartz sand were investigated. The flow pattern histories of granular solids in the filter bed were recorded using a digital camcorder and a pressure gauge for simultaneously measuring the normal stresses as well as shear stresses of the granular solids. The static wall stress distributions produced by the granular solids were measured, and agreed with a theoretical prediction formed using the differential slice and Runge‐Kutta (order four) methods. The variations in the dynamic wall stresses with time in a moving granular filter bed were obtained and the effect of the louver angle upon the flow patterns and wall stresses was also investigated. Employing the results obtained by stress measurements and image processing, the wall pressure pulsation phenomena in a moving granular filter bed may be further understood. The results reported here provide fundamental information for the design of moving granular filter beds to act as high‐temperature flue gas cleanup filters.

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