Regular deviation analysis and treatment of tube explosions caused by oxide scale clogging at final superheater of boilers

Abstract

Abstract:

After the operation of the #2 boiler in a power plant, tube explosion caused by oxide scale clogging at final superheater has occurred many times. The explosion part of tube is analyzed and found to have regular deviation. Through investigation, the main reason for the deviation is improper pouring of thermal insulation castable material. It will lead to a change in the smoke flow field and the formation of flue gas corridor caused by central ash. By modifying the structure of the thermal insulation castable, the problem of ash accumulation and flue gas corridor in the central part is solved, and the hidden danger of the explosion tube can be eliminated.

Key words:

boiler, final superheater, oxide scale, blockage, tube explosion, deviation, smoke corridor

CHEN Yongsheng.

Regular deviation analysis and treatment of tube explosions caused by oxide scale clogging at final superheater of boilers

[J]. Huadian Technology, 2018, 40(6): 23-25.

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Regular deviation analysis and treatment of tube explosions caused by oxide scale clogging at final superheater of boilers

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