Process and equipment for the conveyance of powdered material

Details Process and equipment for the conveyance of powdered material Process and equipment for the conveyance of powdered material

B - Operations, Transporting

65

G

B65G 53/28 (2006.01) B05B 7/14 (2006.01) B65G 53/52 (2006.01)

Patent

CA 2491391

The invention relates to a method and a device (2) for pneumatically transporting pulverulent material (4). According to said method, a cylindrical chamber (10, 12), which can be connected to a storage container (6) by a sealable inlet (14, 16) and to a transport conduit (28) by a sealable outlet (18, 20), is alternately filled with and emptied of material from the storage container (6), when the outlet (18, 20) is closed and the inlet is open (14, 16), by a vacuum action in the chamber, achieved by means of a delimiting partition in the form of a gas-permeable filter element (50), in order to suck material out of the storage container (6) into said chamber (10, 12). When the inlet is closed (14, 16) and the outlet is open (18, 20), the chamber (10, 12) is supplied with a pressurised gas, in order to expel the material that has been sucked into the chamber (10, 12) into the transport conduit (28). To increase the service life of the filter element (50) and to prevent the contamination of the latter in a simple manner, said filter element (50) is configured as a hollow cylinder and surrounds at least part of the chamber (10, 12).

L'invention concerne un proc~d~ et un dispositif (2) permettant le transport pneumatique d'une mati­re pulv~rulente (4). Ce dispositif pr~sente une chambre cylindrique (10, 12) qui peut Útre reli~e ~ un r~servoir (6) par une entr~e (14, 16) obturable et ~ une conduite d'alimentation (28) par une sortie (18, 20) obturable. Cette chambre peut Útre alternativement se remplir d'une mati­re issue du r~servoir et se vider et, lorsque la sortie (18, 20) est ferm~e et l'entr~e (14, 16) ouverte, elle peut Útre mise sous vide par une paroi de d~limitation constitu~e d'un ~l~ment filtrant (50) perm~able au gaz pour que la mati­re issue du r~servoir (6) soit c~d~e ~ la chambre (10, 12) par aspiration. Et lorsque l'entr~e (14, 16) est ferm~e et la sortie (18, 20) ouverte, la chambre (10, 12) est aliment~e en gaz sous pression, la mati­re aspir~e dans la chambre (10, 12) ~tant ainsi pouss~e dans la conduite d'alimentation (28). Pour prolonger la dur~e de vie de l'~l~ment filtrant (50) et ~viter facilement son encrassement, l'~l~ment filtrant (50) est con×u sous la forme d'un cylindre creux et entoure au moins une partie de la chambre (10, 12).

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