理化检验-物理分册2017，Vol.53Issue(8)：603-606,4.DOI:10.11973/lhjy-wl201708015
锅炉水冷壁内螺纹管泄漏原因分析
Reason Analysis on Leakage of the Internally Ribbed Tube in a Boiler Water Wall
刘广兴 1龚巍 2王兆民1
作者信息
- 1. 哈尔滨锅炉厂有限责任公司 材料研究所,哈尔滨 150046
- 2. 高效清洁燃煤电站锅炉国家重点实验室 (哈尔滨锅炉厂有限责任公司),哈尔滨 150046
- 折叠
摘要
Abstract
The leakage reasons of the internally ribbed tube in a boiler water wall during operation were analyzed by methods of macroscopic examination,chemical composition analysis,mechanical property test,metallographic examination, scanning electron microscope and energy spectrum analysis and so on.The results show that during the period of start-up, shutdown or load change of the boiler unit,due to the large temperature fluctuation,the internally ribbed tube wall on the fire-facing side would withstand a large alternating thermal stress,which resulted in transversal fatigue cracks appearing in the tube wall.At the same time,the corrosive ash containing sulfur which attached to the tube wall promoted the expansion of the cracks.The above two factors co-acted and caused the leakage of the internally ribbed tube in the water wall.关键词
水冷壁/内螺纹管/泄漏/交变热应力/热疲劳裂纹Key words
water wall/internally ribbed tube/leakage/alternating thermal stress/thermal fatigue crack分类
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刘广兴,龚巍,王兆民..锅炉水冷壁内螺纹管泄漏原因分析[J].理化检验-物理分册,2017,53(8):603-606,4.
