A sacrificial refractory shield assembly for use on a boiler...

F - Mech Eng,Light,Heat,Weapons – 22 – B

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F22B 37/10 (2006.01) F16L 57/04 (2006.01) F23M 5/00 (2006.01)

Patent

CA 2490539

The refractory shield assembly comprises: a semi-circular, elongate, metal shield; a plurality of spaced apart anchors protruding from the front surface of the shield; a layer of abrasion-resistant refractory material overlying the surface and extending between and engaging the anchors, whereby the refractory material is held on the shield by the anchors; and means, such as clamps, for securing the shield on a boiler tube. The refractory shield assembly functions to protect the underlying boiler tube from erosion by a stream of hot combustion gas containing particulates.

L'assemblage de l'écran réfractaire comprend : un écran de métal semi-circulaire allongé; une pluralité d'ancrages non-jointifs en saillie de la surface avant de l'écran; une couche de matériau réfractaire anti-abrasion sus-jacente à la surface et s'étendant entre et reliant le système d'ancrage où le matériau réfractaire est fixé à l'écran avec les ancrages; et des moyens, tels que des colliers de serrage, pour fixer l'écran à un tube de chaudière. L'assemblage de l'écran réfractaire protège le tube de chaudière sous-jacent contre l'érosion causée par un débit de gaz de combustion chaud contenant des particules.

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