Wastage of Water Wall Tubes in a Circulating Fluidized Bed Combustor with Two Gas Exits

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The tube wastage profiles of water walls are discussed in a commercial CFB furnace with two gas exits. The lateral profile of wear rate confirms that tube wastage is influenced mainly by secondary flow, stronger toward the center than in the corners, and somewhat by the wing walls and gas exits. The effect of two superposed secondary flows of the second kind, one caused by the shape of the entire freeboard cross-section and the other by sections between the wing walls, could also be confirmed in lateral profiles of tube erosion rate on the wall connected with wing walls. Appreciable tube erosion rate was confirmed near the center of the rear wall at lower heights and near the center of both sidewalls at heights above the gas exit level. Wastage or wing walls increased with distance into the interior of the furnace.
Publisher
SOC CHEMICAL ENG JAPAN
Issue Date
2008-08
Language
English
Article Type
Article
Keywords

EROSION

Citation

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, v.41, no.8, pp.809 - 816

ISSN
0021-9592
DOI
10.1252/jcej.07we295
URI
http://hdl.handle.net/10203/90373
Appears in Collection
CBE-Journal Papers(저널논문)
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