中国电力 ›› 2013, Vol. 46 ›› Issue (3): 78-81.DOI: 10.11930/j.issn.1004-9649.2013.3.78.3

• 发电 • 上一篇    下一篇

火电厂过热器化学清洗配方及工艺研究

邓宇强, 曹杰玉, 张祥金, 龙国军, 倪瑞涛   

  1. 西安热工研究院有限公司,陕西 西安 710032
  • 收稿日期:2012-10-08 出版日期:2013-03-05 发布日期:2015-12-10
  • 作者简介:邓宇强(1974—),男,四川雅安人,硕士,高级工程师,从事火力发电厂防腐防垢研究工作。E-mail: dengyuqiang@tpri.com.cn
  • 基金资助:
    华能集团重点科技资助项目(HNKJ10-H08)

Study on Superheater Chemical Cleaning with Different Agents

DENG Yu-qiang, CAO Jie-yu, ZHANG Xiang-jin, LONG Guo-jun, NI Rui-tao   

  1. Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710032, China
  • Received:2012-10-08 Online:2013-03-05 Published:2015-12-10

摘要: 清洗锅炉过热器时若出现氧化皮大量剥落,会造成堵管风险;若清洗介质选择不当会造成材料性能下降。因此,必须充分考虑清洗介质对各种过热器管材表面氧化皮的剥离作用,以及对剥落氧化皮的溶解效果和对所有材料的腐蚀情况。选择EDTA铵盐、EDTA钠盐、柠檬酸、羟基乙酸+甲酸、自制复合有机酸A和自制复合有机酸B等清洗介质进行了氧化皮剥离量、管样除垢率、剥落氧化皮的溶解率试验,并采用上述清洗介质对T22、12Cr1MoV、T91、TP347等4种过热器金属材料进行了腐蚀试验。研究结果表明,同时满足氧化皮剥离量小、管样除垢率高、氧化皮溶解效果好、腐蚀风险小的清洗介质为复合有机酸B。

关键词: 火电厂, 过热器, 化学清洗, 氧化皮, 清洗介质

Abstract: During the chemical cleaning of superheater, flaking, dissolution and corrosion of the cleaning agents must be taken into account in case of tube blockage caused by mass oxide flakes. Moreover, material performance may deteriorate as a result of improper cleaning agents. Therefore, tests on oxide flake volume and solubility as well as the descaling rate for superheater tubes adopting the cleaning agents such as NH4-EDTA, Na-EDTA, citric acid, hydroxyl acetic acid + formic acid, complex-organic-acid-A and complex-organic-acid-B, are carried out. And corrosion tests on four kinds of superheater materials, i.e., T22, 12Cr1MoV, T91 and TP347 adopting these cleaning agents are also conducted. The test results indicate that complex-organic-acid-B is the right one with small flaking oxide volume, high oxide dissolution rate and low corrosion rate.

Key words: thermal power plant, superheater, chemical cleaning, oxide, cleaning agent

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