| 摘要 |
This invention relates to a device for filtering a moving gaseous atmosphere in an installation for unloading pulverulent products in bulk, the installation being of the type constituted by a supply sleeve connecting the base of a silo or hopper to the circular filling orifice of a mobile container, wherein it is constituted by a discharge bushing extending the base of the sleeve, this bushing being engaged in the filling orifice of the container, and this bushing is associated with an outer cone concentric to said bushing and adapted to rest with self-centering on the edges of the orifice thus obturated, the cone being closed at its summit by a horizontal wall comprising an evacuation opening, and the annular space defined between the central tubular bushing and the outer cone constitutes a volume for decantation of the gaseous phase, particularly the air laden with solid particles in suspension and driven from the inner atmosphere of the container, this decantation volume communicating with the volume of the container being filled, and where the dust is developed, by a lower annular passage between the base of the outer cone and the base of the central bushing, and this decantation volume internally comprises a plurality of walls forming baffles, defining a path of the laden air between the lower inlet passage and said upper evacuation opening, comprising a plurality of changes of direction, and the inner bushing comprises openings for communication with said decantation volume, these openings cooperating with said walls forming baffles in order to allow the particles decanted in the volume and recycled with the poured materials, to be recovered.
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