中国电力 ›› 2013, Vol. 46 ›› Issue (1): 46-49.DOI: 10.11930/j.issn.1004-9649.2013.1.46.3

• 发电 • 上一篇    下一篇

超超临界锅炉酸洗技术研究与应用

吴来贵, 申军锋, 范红照, 何振坤, 李玉杰, 曹韵, 李媛媛   

  1. 深能合和电力(河源)有限公司,广东 河源 517000
  • 收稿日期:2012-08-07 出版日期:2013-01-05 发布日期:2015-12-09
  • 作者简介:吴来贵(1969—),男,江西九江人,高级工程师,从事电力环保研究工作。E-mail: laigui@163.com

Research and Application of Chemical Cleaning Technology for Ultra-Supercritical Boilers

WU Lai-gui, SHEN Jun-feng, FAN Hong-zhao, HE Zhen-kun, LI Yu-jie, CAO Yun, LI Yuan-yuan   

  1. SEC&HOPEWELLPOWER (Heyuan) Co., Ltd., Heyuan 517000, China
  • Received:2012-08-07 Online:2013-01-05 Published:2015-12-09

摘要: 超超临界参数下水分子本身具有很强的氧化性,能使锅炉水冷壁管形成致密坚固的垢。以某电厂2×600 MW超超临界机组化学清洗为例,根据锅炉垢样特性,选用了3种复合有机酸,进行静态、动态酸洗模拟试验,测定了不同配方下水冷壁的腐蚀速率,并按动态试验的结果确定了酸洗方案。最终选定了由2%羟基乙酸与0.5%氟化钠组成并添加缓蚀剂的复合有机酸进行化学清洗,腐蚀速率及腐蚀量皆符合标准,清洗效果良好。

关键词: 超超临界机组, 锅炉, 化学清洗, 复合有机酸

Abstract: Water molecules under ultra-supercritical conditions have strong oxidizing nature, which makes boiler water wall tubes form dense scale. Based on the analysis of the scale composition for the two 600-MW ultra-supercritical units at one power plant, the static and dynamic simulation tests are conducted with three sorts of organic acids. And the corrosion rate and corrosion quantity of the metal piece are determined respectively. Following the dynamic simulation test result, 2% glycolic acid and 0.5% sodium fluoride with a certain amount of inhibitor is chosen as the cleaning agent for the two units. After cleaning, both the corrosion rate and corrosion quantity meet the related standard, which indicates that the cleaning effect is satisfactory.

Key words: ultra-supercritical unit, boiler, chemical cleaning, composite organic acid

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