| WNS型锅炉烟管管端热应力裂纹原因分析 |
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| 引用本文： | 胡林明.WNS型锅炉烟管管端热应力裂纹原因分析[J].中国特种设备安全,2021(1). |
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| 作者姓名： | 胡林明 |
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| 作者单位： | 湖南省特种设备检验检测研究院娄底分院 |
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| 摘 要： | 热应力破坏是锅炉烟管管端产生裂纹的主要原因。本文通过对一起WNS型锅炉因烟管管端伸出长度过长及受热面结垢导致烟管管端长期处于过热而产生裂纹泄漏的案例进行分析,模拟计算了水垢厚度对金属壁温的影响,并提出相关预防措施。
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| 关 键 词： | WNS型锅炉 管端 热应力裂纹 |
Analysis and Treatment of Thermal Stress Cracks at the End of the Exhaust Pipe of WNS-type Boiler |
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| Authors: | Hu Linming |
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| Institution: | (Hunan Special Equipment Inspection&Testing Research Institute LouDi Branch,Loudi 41700) |
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| Abstract: | Thermal stress failure was the main reason of cracking at the end of the exhaust pipe of the boiler.It was too long that the length of the exhaust pipe sticking out of the tube sheet and scaling on heating surface of the WNS-Type Boiler,because of these reasons,the exhaust pipe was overheated for a long time and cracks occurred.This case was analyzed in this paper,and calculated the change of metal temperature under the effect of scale thickness on metal wall.At last,corresponding measures were put forward to deal with it. |
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| Keywords: | WNS-type boiler The end of the exhaust pipe Thermal stress cracks |
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