摘要：

采用离子交换微碱化技术处理发电机内冷水,将内冷水中微量溶解的中性盐Cu(HCO₃)₂转化为NaOH,调节溶液成微碱性,从而有效地抑制了铜导线的腐蚀。现场旁路模拟试验结果表明:在小交换柱内填装等工作交换容量的钠型、氢氧型离子交换树脂后,能将Cu²⁺平均质量浓度为371.0μg/L的微酸性内冷水转变成几乎不含Cu²⁺的微碱性水,出水pH的变化范围为7.60～8.95。离子交换柱之前和之后的铜试片试验结果显示:交换柱前的内冷水具有腐蚀性,而经交换柱处理后的内冷水具有抑制铜导线腐蚀的功效。

关键词: 离子交换, 微碱化, 腐蚀, 发电机, 内冷水

Abstract:

A process named ion exchange micro-basification is put forward in the treatment of turbo-generator inner cooling water. The process translates the minim soluble Cu(HCO₃)₂ into NaOH, regulating solution alkalescent and restraining copper corrosion effectively. Field bypass simulated experimental results show that the small exchange column, which is composed of cation exchanger resin of Na-type and anion exchanger resin of OH-type by equal proportion of exchange capacity, is able to change the light acidic inner cooling water with an average Cu²⁺ content of 371.0 μg/L into light basic water nearly without Cu²⁺. The pH of the effluent from the ion exchange mixed bed is in the range of 7.60 to 8.95. The copper tested before and after the small exchange column shows that the cooling water treated by resin has an obvious effect on restraining copper corrosion.

Key words: ion exchange, micro-basification, corrosion, turbo-generator, inner cooling water

中图分类号: 

• TQ085+.411