Refractory tile system for boiler tube/heat exchanger...

F - Mech Eng,Light,Heat,Weapons – 23 – M

Patent

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F23M 5/04 (2006.01) F22B 37/10 (2006.01) F23G 5/44 (2006.01) F23M 5/08 (2006.01) F27D 1/14 (2006.01) F28F 19/02 (2006.01)

Patent

CA 2372168

A refractory tile system (60) includes a barrier layer coating (61) applied to the wall (16) of a boiler. Refractory tiles (66) are then fastened to the tube wall (16) utilizing a floating attachment mechanism (68) to provide a relatively high degree of freedom of movement relative to the tube wall to accommodate micro-scale bowing of the tile generated by the relatively large temperature gradient and mean temperature typically experienced by such tiles. Each tile (66) is also isolated from adjacent tiles by providing a predetermined gap (70) therebetween of sufficient size to effectively prevent macro-scale bowing. Moreover, a compressible fibrous mortar is disposed in the gap between each adjacent tile to prevent contaminants from passing therethrough.

Ce système de tuiles réfractaires (60) comprend un revêtement (61) du type couche barrière, appliqué sur la paroi (16) d'une chaudière. On a fixé ces tuiles réfractaires (66) sur la paroi (16) du tube, au moyen d'un mécanisme de fixation flottant (68), de manière à leur permettre un degré relativement élevé de possibilité de déplacement par rapport à la paroi du tube, afin qu'elle puissent subir une flexion à petite échelle, produite par le gradient de température relativement grand et la température moyenne, auxquels sont généralement soumises de telles tuiles. On a également isolé, de manière efficace, chaque tuile (66) des tuiles adjacentes, en ménageant entre elles un espace (70) déterminé dont la dimension est suffisante pour empêcher une flexion à grande échelle. En outre, on a disposé un mortier fibreux, compressible, dans l'espace situé entre des tuiles adjacentes, de manière à empêcher tout passage de contaminants entre les tuiles.

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