论文部分内容阅读
1 产生镀铜的原因和危害目前我国中高压锅炉发电机组的凝汽器管大多由铜管制成,而锅炉给水的pH值通常采用加氨处理来调整。氨是一种挥发性物质,进入锅炉后随着锅水蒸发而进入热力系统。由于氨对铜部件有一定的腐蚀作用,其腐蚀产物溶入凝结水返回至给水后,在锅炉高温受热面尤其是水冷壁上易随同其它金属氧化物沉积成垢。当锅炉酸洗时,随着沉积物的溶解,具有氧化性的铜离子就会与
1, the reasons for the occurrence of copper and the hazards At present, China’s high-pressure boiler generator sets of condenser tubes are mostly made of copper, and the boiler feed water pH is usually adjusted with ammonia treatment. Ammonia is a volatile material that, as it enters the boiler, evaporates into the heat system as it evaporates. Since ammonia has a certain corrosive effect on the copper parts, the corrosion products dissolve in the condensed water and return to the feed water, which easily deposits on the heated surface of the boiler, especially the water-cooled wall, along with other metal oxides. When the boiler pickling, with the dissolution of the sediment, with the oxidation of copper ions will be