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Device for fluidizing and distributing powder
| Details |
Inventors: Aubin, Gerard; Braguier, Michel Arsene; Naturel, Christian; Poulin, Etienne M.; Wattre, Joseph A.;
Assignee: Letat Francais represente par le Ministre des Postes et (Moulineaux, FR); Desmarquest et C.E.C. S.A. (Montrouge, FR)
Primary Examiner: Blunk; Evon C.
Assistant Examiner: Rowland; James L.
Attorney, Agent or Firm: McNenny, Pearne, Gordon, Gail, Dickinson & Schiller
A device for fluidizing and distributing a powder in suspension in a carrier gas, characterized in that it comprises, between an inlet conduit fed with said powder and an outlet conduit adapted to distribute the powder once fluidized, a separating means dividing said inlet conduit into two pipes which open and converge into a chamber communicating with said outlet conduit. |
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DETAILED DESCRIPTION What is claimed is: 1.
A device for fluidizing and distributing a powder in suspension in a carrier gas comprising: an enclosed cornerless chamber having an inner wall and a center; inlet conduit means for feeding a powder to be fluidized into said chamber; separating means dividing said inlet conduit into two pipes communicating with said chamber, said pipes having axes which converge to a point in the vicinity of said wall; and outlet conduit means for distributing said powder once fluidized, said outlet conduit means having an opening communicating with said chamber, and said opening being located in the vicinity of said center of said chamber.
2.
A device according to claim 1 wherein said outlet conduit means includes two tubes with conical end portions nested one inside the other to form said opening, said tubes being adapted to carry a flow of gas similar to the carrier gas, and said end portions and said opening constituting a suction device of the venturi-type.
3.
A device according to claim 2, wherein one of said tubes is mounted on means for adjusting its position with respect to the other of said tubes.
Description:
The present invention relates to a device for fluidizing and distributing a powder in suspension in a gas.
It can be applied with advantage to powder-projecting devices, e.
g.
to projection installations comprising a plasma torch.
In quite a number of applications, when use is made of a powder in suspension in a gas, it is desirable to achieve a thorough and homogeneous fluidization of said powder, followed by an even distribution of the thus-fluidized powder.
The devices in present use sometimes fail to be satisfactory in this connection, since they leave heaps of particles or agglomerates, on the one hand, and insufficiently lend themselves to an even distribution of the powder up to the apparatus adapted to use said powder, on the other hand, in view of their bulkiness and of their weight which remove them from said apparatus by distributing conduits in which new agglomerates are unavoidably formed again
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Liquid Purification 
