基于镜面回波估计的热壁加氢反应器堆焊层缺陷多模式全聚焦成像

Multi-mode total focusing imaging for cladding layer defect in hot wall hydrogenation reactors based on specular echo estimation

热壁加氢反应器长期在高温、高压和氢腐蚀等恶劣工况下运行,其内壁堆焊层的缺陷检测对设备安全至关重要。针对加氢反应器堆焊层的外侧超声检测技术难点,提出了一种基于镜面回波估计的多模式全聚焦成像检测方法。首先,使用镜面回波估计器进行仿真分析得到多模式全聚焦成像区域灵敏度,确定对缺陷敏感的超声路径;然后,获得不同路径下裂纹缺陷的全聚焦成像特征;最后,使用多模式全聚焦成像方法对试块堆焊层表面裂纹缺陷进行检测与定位。仿真及试验结果验证了该方法在内壁裂纹检测及缺陷定位精度上的可靠性,为行业提供了一种更经济高效的检测方案。

The hot wall hydrogenation reactor operates under harsh conditions such as high temperature,high pressure,and hydrogen corrosion for a long time,and defect detection of the inner wall cladding layer is crucial for equipment safety.A multimode fully focused imaging detection method based on mirror echo estimation is proposed to address the technical difficulties of ultrasonic testing on the outer side of the hydrogenation reactor weld layer.Firstly,a mirror echo estimator is used for simulation analysis to obtain the sensitivity of the multi-mode fully focused imaging area,and to determine the ultrasonic path sensitive to defects in the weld overlay;Then,obtain the fully focused imaging features of crack defects under different paths;Finally,the multi-mode fully focused imaging method is used to detect and locate crack defects of different sizes on the surface of the test block weld layer.The simulation and experimental results have verified the reliability of this method in detecting inner wall cracks and locating defects accurately,providing a more economical and efficient detection solution for the industry.