A fume-filtration system having a moving bed of stone chippings

B - Operations – Transporting – 01 – D

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B01D 46/34 (2006.01) B01D 53/08 (2006.01) B01D 53/50 (2006.01)

Patent

CA 2233638

A fume-filtration system comprises a plurality of filter modules (1, 2, 3, 4, 5) connected in parallel and aligned in a battery, in which a flow of fumes introduced into the modules passes through a filter column of stone chippings housed in the modules and forming a first free surface (23, 24) for the inlet of the fumes and a second free surface (25, 26) for the outlet of fumes, the column being renewed in counter-current to the fume flow either with continuous or intermittent renewal, the intermittent renewal being performed on a module temporarily excluded from the set of modules in parallel.

Ce système de filtration de fumées comprend une pluralité de modules (1, 2, 3, 4, 5) de filtre reliés en parallèle et alignés en batterie, et il est caractérisé en ce qu'un flux de fumées, introduit dans ces modules, passe à travers une colonne filtrante de gravillons logés dans les modules et formant une première surface (23, 24) libre destinée à l'entrée des fumées, ainsi qu'une seconde surface (25, 26) libre destinée à la sortie des fumées, la colonne étant renouvelée à contre courant du flux de fumées, par renouvellement soit en continu, soit par intermittence, le renouvellement intermittent s'effectuant sur un module exclu temporairement de l'ensemble des modules reliés en parallèle.

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