基于表面红外热像的运行中脱硫塔壁厚定量检测研究

刘宏林; 韩玉军; 史勇; 孔松涛; 王堃

基于表面红外热像的运行中脱硫塔壁厚定量检测研究

刘宏林^1,,
韩玉军²,
史勇³,
孔松涛³,
王堃^3, ,

1.
中国核电工程有限公司郑州分公司，河南郑州 450000
2.
东方希望重庆水泥有限公司，重庆 408200
3.
重庆科技学院，重庆 401331

详细信息

作者简介:
刘宏林（1981-），男，高级工程师，主要从事核电站，火电项目的设计研究工作。E-mail：airo0424@163.com

通讯作者:
王堃（1980-），男，副教授，主要研究方向为流体传热及传热学反问题。E-mail：3938630@qq.com

中图分类号: TB21
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- 被引次数: 0
出版历程
- 收稿日期: 2021-04-08
- 修回日期: 2021-10-05
- 刊出日期: 2021-11-20

Wall Thickness Quantitative Detection of Desulfurization Tower in Operation Based on Surface Infrared Thermal Image

1.
Zhengzhou Branch of China Nuclear Power Engineering Corporation Ltd, Zhengzhou 450000, China
2.
Oriental Hope Chongqing Cement Co. Ltd, Chongqing 408200, China
3.
Chongqing University of Science & Technology, Chongqing 401331, China

摘要

摘要: 本文采用共轭梯度方法，根据脱硫塔表面的红外热像对运行中的脱硫塔壁厚进行了检测。由于脱硫塔内部检测环境恶劣，壁厚检测所需要的脱硫塔内壁面热流亦采用共轭梯度法反演得到。首先通过数值实验，验证了本方法的可行性。然后，依据红外热像进行反演，发现脱硫塔存在筒体腐蚀，防腐涂层脱落和减薄等问题。利用后续的停机检修，对问题区域进行了复核，亦证实了以上部位的异常，表明了本文所提出的基于表面红外热像的脱硫塔壁厚定量检测方法的有效性和准确性。
- 红外热像 /
- 脱硫塔 /
- 壁厚 /
- 定量检测
Abstract: In this study, the wall thickness of the desulfurization tower during operation was measured using the conjugate gradient method according to the infrared thermogram of the tower surface. Because of the harsh detection environment inside the desulfurization tower, the inner-wall heat flow, which was needed for wall thickness detection, was also obtained by inversion of the conjugate gradient method. First, the feasibility of the proposed method was verified using numerical experiments. Subsequently, based on the infrared thermal image inversion, it was found that the desulfurization tower had some problems, such as the corrosion of the cylinder, the falling off of the anticorrosive coating, and the thinning. In the subsequent downtime maintenance, the problem area was rechecked, and the anomalies mentioned above were confirmed, which indicated the effectiveness and accuracy of the quantitative detection method for the wall thickness of the desulfurization tower based on the surface infrared thermal image proposed in this study.
- infrared thermal image /
- desulfurization tower /
- wall thickness /
- quantitative detection

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图 1 某厂工作中的脱硫塔

Figure 1. Desulfurization tower in work

下载: 全尺寸图片幻灯片

图 2 脱硫塔浆液区

Figure 2. Desulfurization tora tap

下载: 全尺寸图片幻灯片

图 3 高温区域1对应的红外热像图

Figure 3. Infrared image of the high temperature region 1

(a) Infrared image of the tower (b) Local enlargement picture

下载: 全尺寸图片幻灯片

图 4 高温区域2对应的红外热像图

Figure 4. Infrared image of the high temperature region 2

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图 5 高温区域3对应的红外热像图

Figure 5. Infrared image of the high temperature region 3

下载: 全尺寸图片幻灯片

表 1 脱硫塔几何参数及热物性参数

Table 1. Geometric parameters and thermophysical parameters ofdesulfurization tower

Material Thickness /
mm Diameter/
mm Thermal conductivity/
[W/(m·K)]

Anticorrosive
coating 4 5520 0.35

The tower wall 14 5528 48.85

下载: 导出CSV

表 2 不同测量误差时的检测结果

Table 2. The detection results of the different measurementerrors

Measurement
error σ Detect wall
thickness d/mm Relative
error/ %

0.055 15.92 0.50

0.1 16.35 2.19

0.2 17.14 7.13

下载: 导出CSV

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