针对沿海电厂凝汽器泄漏这一重大安全隐患，总结了不同情况海水泄漏对水汽品质造成的影响，分析了海水污染水汽品质对热力系统造成的危害，同时对国内多起火力发电机组凝汽器海水泄漏典型案例进行了分析和研究。结果表明：如果发生凝汽器海水泄漏时处理措施不当，易导致锅炉水冷壁发生大面积酸性腐蚀、垢下腐蚀、过热器及再热器积盐、汽轮机通流部件氯化钠沉积、低压缸相变区严重溃疡腐蚀等危害。

In view of the major safety hazard on condenser leakage in coastal power plants，the influence of seawater leakage on water vapor quality under different conditions was summarized，and the danger of polluted seawater vapor quality to different thermal equipments was analyzed in the paper. Meanwhile，a large number of typical cases about seawater leakage of condenser of thermal power generator set in China were analyzed and studied. The results show that if the treatment measures are not correct when condenser seawater leakage occurs，the different degrees of hazards are easy to occur，such as underdeposited acid corrosion in large area of boiler water wall，salt accumulation in the superheater and reheater，sodium chloride deposition in the steam turbine flow part and severe ulcerative corrosion in the phase transition zone of low pressure steam turbine and so on.

TK268