Storage and extraction device for powdered products
AssigneeSociete Colmant Cuvelier Dodge
InventorMichel G. Bonnel
Life of this patent
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Abstract
Apparatus for feeding finely powdered material from a silo to a device illustratively a burner, in which the material in the silo is fluidized and extracted through a proportioning device, such as a screw or a distributor having alveoles. The material from the proportioning device, which is discharged intermittently, is supplied to a regulating tunnel where it is further fluidized and then discharged to the downstream side of a venturi whose upstream side is supplied with pressurized air. The fluidizing air in the silo and the regulating tunnel are preferably at the same pressure.
Claims8
Apparatus for the storage and feeding of finely powdered material comprising:
- a silo for containing said material, means for fluidizing said material in the silo,
- proportioning means for extracting said material from said silo,
- an elongated tunnel having a porous partition defining first and second chambers, said partition selectively allowing passage of gas within said first chamber to fluidize said material received in said second chamber from an outlet of said proportioning means, said tunnel extending at a downward incline from the horizontal so that said received material fluidizes and flows down said incline substantially as a fluid, the slope and length of said incline such that said material exits said tunnel as a substantially uniform composition, and
- venturi means at the outlet of said tunnel including
- a hopper for receiving material from said tunnel,
- a venturi receiving material from said hopper, said hopper obliquely intersecting and discharging into the downstream portion of said venturi at an incline corresponding to the direction of flow in said venturi, said incline substantially eliminating depression turbulence, and
- means supplying gas to said venturi.
Apparatus for the storage and feeding of finely powdered material comprising:
- a cylindrical silo for containing said material, said silo having a conical bottom,
- means for fluidizing said material in the silo including means for dividing the conical bottom into a plurality of sectors, means in each of said sectors forming a fluidized bed for the material, and distributor means for independently supplying a fluidizing gas to each of said sectors one sector at a time to prevent the formation of bridges which would otherwise cause the outflow of material to be irregular,
- proportioning means for extracting said material from said silo,
- an elongated tunnel having a porous partition defining first and second chambers, said partition selectively allowing passage of gas within said first chamber to fluidize said material received in said second chamber from an outlet of said proportioning means, said tunnel extending at a downward incline from the horizontal so that said received material fluidizes and flows down said incline substantially as a fluid, the slope and length of said incline such that said material exits said tunnel as a substantially uniform composition, and
- venturi means at the outlet of said tunnel for receiving said material from said tunnel.
Dependencies are inferred from the claim text.