发电机内冷却水系统高含量单质铜垢的化学清洗

doi:10.11930/j.issn.1004-9649.201711006

中国电力 ›› 2018, Vol. 51 ›› Issue (11): 15-19,184.DOI: 10.11930/j.issn.1004-9649.201711006

发电机内冷却水系统高含量单质铜垢的化学清洗

吴俊杰^1,3, 刘凯^2,3, 周舟^1,3, 查方林^2,3, 冯兵^1,3, 万涛^1,3, 徐松^1,3, 龚尚昆^1,3

1. 国网湖南省电力有限公司电力科学研究院湖南长沙 410007;
2. 湖南省湘电试验研究院有限公司湖南长沙 410004;
3. 高效清洁火力发电技术湖南省重点实验室, 湖南长沙 410007

收稿日期:2017-10-29 修回日期:2017-12-06 出版日期:2018-11-05 发布日期:2018-11-16
作者简介:吴俊杰(1984-),男,博士,高级工程师,从事电力装备高效冷却技术与电工新材料研究,E-mail:wujunjie@iccas.ac.cn;刘凯(1981-),男,硕士,高级工程师,从事发电厂水处理研究,E-mail:lkbb0734@126.com
基金资助:
国网湖南省电力有限公司科技资助项目（5216A516002Z）；湖南省湘电试验研究院有限公司科技资助项目（XDKY-2015-001）；湖南省科技创新平台与人才计划（2016TP1027）。

Chemical Cleaning for Inner Cooling System in Generator with High Content Copper Deposition

WU Junjie^1,3, LIU Kai^2,3, ZHOU Zhou^1,3, ZHA Fanglin^2,3, FENG Bing^1,3, WAN Tao^1,3, XU Song^1,3, GONG Shangkun^1,3

1. State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410007, China;
2. Hunan Xiangdian Test Research Institute Co., Ltd., Changsha 410004, China;
3. Hunan Province Key Laboratory of High Efficient & Clean Thermal Power Technology, Changsha 410007, China

Received:2017-10-29 Revised:2017-12-06 Online:2018-11-05 Published:2018-11-16
Supported by:
This work is supported by Science and Technology Project of State Grid Hunan Electric Power Co., Ltd. (No.5216A516002Z); Science and Technology Project of Hunan Xiangdian Test Research Institute Co., Ltd. (No.XDKY-2015-001); Science-Technology Innovation Platform and Talents Program of Hunan Province (No.2016TP1027).

摘要/Abstract

摘要： 发电机内冷却水（内冷水）系统腐蚀及腐蚀产物沉积所引起的绝缘性能与通流冷却能力下降，是发电机运行的重要安全隐患。某发电厂发电机内冷水系统出现堵塞、超温异常，其腐蚀产物中单质铜含量高。为消除隐患，首次采用以氨基磺酸为主的复合酸并添加双氧水作为清洗介质，辅以分步去除氧化铜和单质铜的工艺，对该发电机内冷水系统实施了化学清洗。结果表明，所采用的清洗工艺技术有效去除了线棒内的腐蚀产物，且对线棒本体损伤较小；与清洗前相比，清洗后定子线棒最高温度下降了9.9 ℃，线棒间最大温差下降了10 ℃，不同线棒间出水最大温差下降了11 ℃，确保了发电机安全经济运行。

关键词: 发电机, 内冷却水, 腐蚀, 单质铜, 氧化铜, 化学清洗, 氨基磺酸

Abstract: Insulation deterioration and cooling capacity decrease due to corrosion and deposition of corrosion products in inner cooling water system are potential threats to generator operation. At a power plant of Hunan Province, abnormal temperature and blockage are observed in the generator inner cooling water system with high content copper in the corrosion products. To address the potential issues, chemical cleaning is carried out for the first time by using amino sulfonic acid based composite acid with the addition of hydrogen peroxide in combination with multi-step rinse process to eliminate copper oxides and copper. The results indicate that, by taking advantage of this technology the inner corrosion products are effectively cleared with very few damages to the stator bar. The before and after comparison shows that the temperature of stator winding during operation was reduced up to 9.9℃. The maximum temperature difference between stator coil bars is reduced by 10℃, while the maximum temperature difference between the water outlets from stator coil bars dropped by 11℃, respectively. In this way the secure and economical operation of generator can be ensured.

Key words: generator, stator cooling, corrosion, copper, copper oxides, chemical cleaning, amino sulfonic acid

中图分类号:

TM621.8

吴俊杰, 刘凯, 周舟, 查方林, 冯兵, 万涛, 徐松, 龚尚昆. 发电机内冷却水系统高含量单质铜垢的化学清洗[J]. 中国电力, 2018, 51(11): 15-19,184.

WU Junjie, LIU Kai, ZHOU Zhou, ZHA Fanglin, FENG Bing, WAN Tao, XU Song, GONG Shangkun. Chemical Cleaning for Inner Cooling System in Generator with High Content Copper Deposition[J]. Electric Power, 2018, 51(11): 15-19,184.

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https://www.electricpower.com.cn/CN/Y2018/V51/I11/15

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发电机内冷却水系统高含量单质铜垢的化学清洗

Chemical Cleaning for Inner Cooling System in Generator with High Content Copper Deposition

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Chemical Cleaning for Inner Cooling System in Generator with High Content Copper Deposition

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