Single-pipe cylindrical reformer and operation method therefor

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 3/38 (2006.01) B01B 1/00 (2006.01) B01J 8/02 (2006.01) B01J 8/04 (2006.01) B01J 8/06 (2006.01) C01B 3/48 (2006.01) C01B 3/58 (2006.01) H01M 8/06 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2335483

A single-pipe cylinder type reformer produces a hydrogen-rich reformed gas by performing steam reforming for a reformation material gas such as town gas. A circular inner cylinder (3 or 68) is concentrically located inside an upright circular outer cylinder (1 or 10) forming the jacket of the reformer at a distance in the radial direction. Circular intermediate cylinders (2 or 60) are concentrically located between the outer cylinder and the inner cylinder at distances in the radial direction, respectively. A circular radiation cylinder (4 or 14) is concentrically located inside the inner cylinder at a distance in the radial direction. A burner (8 or 18) fixed to one end portion of the reformer in the axial direction to be located in the center of the radiation cylinder in the radial direction and a steam generator (34) are disposed inside the outer cylinder. A plurality of annular paths communicating with each other are formed in laminar shapes between the inner cylinder, the intermediate cylinders, and the outer cylinder to form a reforming catalyst layer (5 or 13), CO converter catalyst layer (11) and/or CO selective oxidizing catalyst layer (12), and a cooling fluid path (48) for feeding a reformation material gas and reforming water, and air path (42). According to this reformer, buckling of each constituent member is prevented to prevent a decrease in operation performance, and a heat radiation loss is reduced, thus realizing a compact reformer with high start-up speed and high operation efficiency. Furthermore, since this reformer can produce a hydrogen-rich reformed gas having low CO concentration, the reformer is best suited for use in combination with a polymer electrolyte fuel cell.

L'invention concerne un reformeur cylindrique monotube comprenant un tube intérieur cylindrique (68), un groupe de tubes intermédiaires cylindriques (60), un tube radiant cylindrique (14), un brûleur (18) et un générateur de vapeur (34), tous logés à l'intérieur d'un tube extérieur cylindrique (10). Les extrémités axiales des tubes extérieurs et intérieurs, opposées à une position de fixation du brûleur, présentent des structures à double fond, et des passages tubulaires sont formés dans des couches situées entre le tube intérieur, le groupe de tubes intermédiaires et les tubes extérieurs de façon à servir respectivement de couche catalytique de reformage (13), de couche catalytique de modification de CO (11) et/ou de couche catalytique oxydante de sélection de CO (12), de passage de fluide de refroidissement (48) pour l'introduction d'un matériau de reformage, d'eau et de gaz, et de passage d'air (42). Lors du fonctionnement du reformeur, si une température interne atteint une température prédéterminée, une vapeur saturée ou surchauffée est acheminée au générateur de vapeur (34), et, si elle est supérieure à la température prédéterminée, une vapeur humide est acheminée. Etant donné que ce reformeur est de dimension réduite, qu'il est rapide à démarrer, présente un rendement élevé et peut produire un gaz reformé à faible concentration en CO, il peut être combiné de manière optimale à une pile à combustible à polymère solide.

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