循环流化床锅炉水冷壁热应力影响因素分析

高义斌; 左琪; 张浩; 樊尊硕; 李勇; 徐婧

doi:10.21656/1000-0887.460177

循环流化床锅炉水冷壁热应力影响因素分析

doi: 10.21656/1000-0887.460177

高义斌¹,
左琪¹,
张浩¹,
樊尊硕²,
李勇²,
徐婧^2, ,

1. 国网山西省电力有限公司电力科学研究院，太原 030001;
2. 太原理工大学电气与动力工程学院，太原 030024

基金项目:

国网山西省电力公司科技项目（520530250004）

详细信息

作者简介:
高义斌（1979—），男，正高级工程师，硕士(E-mail: gaoyibin2004@126.com);徐婧（1989—），女，副教授，博士(通信作者. E-mail: xujing@tyut.edu.cn).

通讯作者:
徐婧（1989—），女，副教授，博士(通信作者. E-mail: xujing@tyut.edu.cn).

中图分类号: O351
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- 文章访问数: 20
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- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2025-09-24
- 修回日期: 2025-12-17
- 网络出版日期: 2026-07-30
- 刊出日期: 2026-08-01

Influencing Factors on the Water-Cooled Wall Thermal Stress in CFB Boilers

Gao Yibin¹,
Zuo Qi¹,
Zhang Hao¹,
Fan Zunshuo²,
Li Yong²,
Xu Jing^{2
, ,}

1. State Grid Shanxi Electric Power Company Electric Power Research Institute Taiyuan, Taiyuan 030001, P.R. China;
2.College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, P.R. China

摘要

摘要: 本文以某在役超临界循环流化床（circulating fluidized bed, CFB）锅炉为研究对象，结合实际运行数据，构建其温度场与应力场的仿真模型，探讨了管壁外热流密度、对流传热系数等边界条件对水冷壁管最高温度与最大热应力的影响规律，分析了鳍片厚度、管间节距等结构参数对相邻水冷壁管最大温差与最大热应力的影响.仿真结果表明：当对流换热系数一定时，水冷壁管的最高壁温与最大热应力随着管外壁热流密度的增大而增大；当管外壁热流密度一定时，水冷壁管的最高温度与最大热应力随着管壁与工质间对流换热系数的增大而减小；当换热系数降低至0.5 kW/(m²·K) 时，最大热应力迅速增大，相邻水冷壁管的最大温差及最大热应力会随着鳍片厚度的减小而增大，但会随着管间节距的增大而增大.当鳍片厚度减少2 mm时，相邻水冷壁管的最大温差可升高约5 ℃，对应的最大热应力由213 MPa升高至219 MPa；当管间节距增加2 mm时，相邻水冷壁管的最大温差可升高7 ℃，对应的最大热应力由213.8 MPa升高至215.1 MPa.
- 循环流化床锅炉 /
- 水冷壁 /
- 数值模拟 /
- 壁温 /
- 热应力
Abstract: The in-service supercritical circulating fluidized bed boiler was investigated. Based on actual operational data, a numerical simulation model for the temperature field and the stress field was established. The effects of boundary conditions, including the external heat flux density of the tube wall and the convective heat transfer coefficient, on the maximum wall temperature and maximum thermal stress of the water-wall tube, were discussed. In addition, the influences of structural parameters, such as the fin thickness and the tube pitch, on the maximum temperature difference and maximum thermal stress between adjacent water-wall tubes, were analyzed. The simulation results indicate that, under a constant convective heat transfer coefficient, both the maximum wall temperature and the maximum thermal stress of the water-wall tube will increase with the external heat flux density. Conversely, when the external heat flux density is kept constant, the maximum wall temperature and maximum thermal stress will decrease as the convective heat transfer coefficient between the tube wall and the working medium increases. Notably, when the convective heat transfer coefficient decreases to 0.5 kW/((m²·K), the maximum thermal stress will increase sharply. Furthermore, the maximum temperature difference and maximum thermal stress between adjacent water-wall tubes will increase with the decrease of the fin thickness, but increase with the tube pitch. Specifically, when the fin thickness is reduced by 2 mm, the maximum temperature difference between adjacent water-wall tubes will increase by approximately 5℃, accompanied by an increase in the maximum thermal stress from 213 MPa to 219 MPa. When the tube pitch increases by 2 mm, the maximum temperature difference will rise by about 7 ℃, and the corresponding maximum thermal stress will rise from 213.8 MPa to 215.1 MPa.
- circulating fluidized bed boiler /
- watercooled wall /
- numerical simulation /
- wall temperature /
- thermal stress

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