# US 2014/0193570 A1 · Jet Spouted Bed Type Reactor Device Having A Specific Profile For CVD > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193570 A1 - Document ID: US20140193570A1 - Status: Published application - Kind: A1 - Application number: 14/129,916 - Filed: 2012-06-28 - Published: 2014-07-10 - Earliest claimed: 2011-06-28 - Assignees: Commissariat A L'energie Atomique Et Aux Energies Alternatives - Inventors: Meryl Brothier; Dominique Moulinier; Philippe Rodriguez; Carine Ablitzer - Web page: https://patentgrep.com/patent/US20140193570A1 ## CPC - G21C 3/20: with coating on fuel or on inside of casing; with non-active interlayer between casing and active material {with multiple casings or multiple active layers} - C23C 16/4417: {Methods specially adapted for coating powder} - C23C 16/442: using fluidised bed process - C23C 16/455: characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber - G21C 3/623: {Oxide fuels} - G21C 21/02: Manufacture of fuel elements or breeder elements contained in non-active casings - Y02E 30/10: Nuclear fusion reactors - Y02E 30/30: Nuclear fission reactors - G21C: NUCLEAR REACTORS (fusion reactors, hybrid fission-fusion reactors G21B; nuclear explosives G21J) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The invention relates to a jet spouted bed reactor, comprising a cylindrical area, a gas injection pipe at the base of the cylindrical area, and a transition area, connecting the upper end of the pipe to the base of the cylindrical area, this transition area having a convex profile in a plane extending through the axis (YY′) of flow of a fluid in the pipe. ## Claims ### Claim 1 Jet spouted bed reactor, comprising a cylindrical area, a gas injection pipe at the base of the cylindrical area, and a transition area, connecting the upper end of the pipe to the base of the cylindrical area, this transition area having a convex, or predominantly convex, profile in a plane extending through the axis (YY′) of flow of a fluid in the pipe. ### Claim 2 (depends on 1) Jet spouted bed reactor according to claim 1, in which the angle β between the axis of flow of a fluid in the pipe and the tangent to the convex, or predominantly convex, profile at the point where it joins the pipe is at least equal to 5°, and, preferably, less than 45°. ### Claim 3 Jet spouted bed reactor according to the preceding claim, the angle β being at least equal to 10°, and, preferably, less than 35°. ### Claim 4 (depends on 1) Jet spouted bed reactor according to claim 1, the convex or predominantly convex profile having a point of inflexion, and the angle θ1 between, on the one hand, an axis perpendicular to the direction of flow of a fluid and extending through the base of the cylindrical part and, on the other hand, the tangent to the point of inflexion I of the convex profile, being greater than 10°. ### Claim 5 (depends on 1) Jet spouted bed reactor according to claim 1, wherein the angle θ2 between, on the one hand, an axis perpendicular to the direction of flow of a fluid and extending through the base of the cylindrical part and, on the other hand, a straight line extending through the end of the gas injection pipe and through the base of the cylindrical part, is less than 90°. ### Claim 6 (depends on 1) Jet spouted bed reactor according to claim 1, wherein the distance (h1) between the end of the gas injection pipe and the base of the cylindrical section of the reactor is greater than 1/10 of the radius of the bed in this cylindrical section. ### Claim 7 (depends on 1) Jet spouted bed reactor according to claim 1, wherein the convex or predominantly convex profile is defined by a succession of N (N≧2) straight line segments. ### Claim 8 (depends on 1) Method of deposition on particles, comprising: the introduction of said particles into a jet spouted bed reactor according to claim 1, the introduction, via the gas injection pipe, of a gas transporting a precursor of the deposition to be carried out on said particles. ### Claim 9 (depends on 8) Method according to claim 8, wherein r1, the radius of the injection pipe, is comprised between 5 D (D=diameter of the particles) and ⅕ r2, where r2 is the radius of the bed in the cylindrical section. ### Claim 10 (depends on 8) Method according to claim 8, the convex profile having a point of inflexion, and the angle θ1 between, on the one hand, an axis perpendicular to the direction of flow of a fluid and extending through the base of the cylindrical part and, on the other hand, the tangent to the point of inflexion I of the convex, or predominantly convex, profile being greater than the angle of spontaneous flow of the powder constituting the bed to be mixed on an inclined plane. ### Claim 11 (depends on 8) Method according to claim 8, the angle θ2 between, on the one hand, an axis perpendicular to the direction of flow of a fluid and extending through the base of the cylindrical part and, on the other hand, a straight line extending through the end of the gas injection pipe and through the base of the cylindrical part, being greater than the angle of spontaneous flow of the powder constituting the bed to be mixed on an inclined plane. ### Claim 12 (depends on 8) Method according to claim 8, at least a part of the particles having a diameter of the order of 500 μm and/or the difference in specific mass between the fluidisation gas and the powder to be fluidised being greater than or equal to 5 g/cm3. ### Claim 13 (depends on 8) Method according to claim 8, wherein a plurality of successive depositions are carried out on said particles. ### Claim 14 (depends on 8) Method according to claim 8, the particles being fuel particles used in HTR type nuclear reactors.