高温再热器管变形原因分析及处理

Reason analysis and treatment of deformation of high temperature reheater tube

国电民权发电有限公司#1炉试运行期间,高温再热器管发生S形变形,对变形管进行了宏观检查及相关数据测量。经过分析,得出再热器管排变形的原因为管材膨胀系数不一致及管材内应力,针对性采取了更换管段、跟踪监督、综合治理等措施,确保了高温再热器管排安全稳定运行。

The S-shaped deformation of high temperature reheater tube in No.1 boiler of Minquan Power Generation Corporation Limited of China Guodian Corporation was occurred during trial operation. The macroscopic detection and related data measurement were carried out for the deformed tubes. The analysis showed that the deformation reason of reheater tubes bundle is the expansion coefficient difference of tubes materials and the inner stress of the tubes material. Some measures were adopted such as replace certain tubes sections,tracing and supervisory,comprehensive treatment,etc. so the safety and stable operation of the high temperature reheater tubes bundle had been ensured.