Failure analysis and design optimization of non metallic expansion joint at inlet duct of denitrification device

Huadian Technology ›› 2016, Vol. 38 ›› Issue (1): 64-67.

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Failure analysis and design optimization of non metallic expansion joint at inlet duct of denitrification device

1.Shenghua Guohua(Beijing)Electric Power Research Institute Company Limited,Beijing 100025,China;2.Shenhua Guangdong GuohuaYuedian Taishan Power Generation Company Limited,Taishan 529228,China

Online:2016-01-25 Published:2016-03-15

Abstract

Abstract:

Abstract:Some faults are existed in the non metallic expansion joint at inlet duct of denitrification device for a certain 1000MW power unit,such as the lower skin cracking and serious deformation of flange etc.Through the analysis,the failure reason is considered as the unreasonable structure design of double wave type middle flange hinge of expansion joint.In this paper,the original expansion joint was replaced by single wave structural non metallic expansion joint,and some structural optimizations of expansion joint frame,thermal protective coating and skin were also conducted.More than two years of operation shows that the expansion joint works well and the surface temperature is less than 50℃ under full load condition.

Key words: Keywords:denitrification device, inlet duct, non metallic expansion joint, skin, flange, thermal protective coating

WANG Sen1,AN Hong2,ZHU Bin2,WANG Shushan2. Failure analysis and design optimization of non metallic expansion joint at inlet duct of denitrification device[J]. Huadian Technology, 2016, 38(1): 64-67.

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Failure analysis and design optimization of non metallic expansion joint at inlet duct of denitrification device

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