对苏制TⅡ-82型锅炉过热器再热器寿命损耗率计算

Calculation of the Life Loss Rate of the Superheater and Reheater of a Soviet-Union-made TⅡ-82 Type Boiler

电厂中由于锅炉的壁温及使用寿命监测手段比较落后,锅炉四管爆裂问题经常发生,尤其是锅炉过热器和再热器,而过热器和再热器超温爆管直接影响到机组的安全运行和经济性,因此电厂中对锅炉过热器再热器壁温和寿命损耗率的计算显得很重要。对苏制TII-82型锅炉过热器再热器的寿命损耗率的计算进行了研究,根据文中提出的锅炉过热器再热器寿命损耗率计算的模型,以某电厂的1号炉为例,最后计算出寿命损耗率=0.22141,为以后能够开发一套能准确计算锅炉过热器再热器壁温及寿命预测的在线监测与故障诊断系统提供了基础。

Because of the measures for monitoring the wall surface temperature and service life of a boiler in power plants falling behind relatively,rupture problems of four types of boiler tubes often take place,especially boiler superheaters and reheaters.The tube rupture due to an overtemperature of a superheater and reheater directly affects the safe operation and cost-effectiveness of their unit.Hence,calculation of wall surface temperature and life loss rate of a boiler superheater and reheater in a power plant is very important.The authors have performed a study of the calculation of the life loss rate of the superheater and reheater of a Soviet-Union-made TII-82 type boiler.According to the model for calculating the life loss rate of superheaters and reheaters of boilers presented by the authors,with No.1 boiler of a power plant serving as an example,the life loss rate of the boiler superhearer and reheater was calculated as ф=0.22141.Therefore,the foregoing can provide a basis for developing an on-line monitoring and fault diagnosis system in the future,which can accurately predict wall surface temperature and service life of a boiler superheater and reheater.