电厂锅炉复合有机酸化学清洗探析  

Research on boiler chemical cleaning of complex organic acid in power plant

作　　者：姜波[1] 王冬梅[2] 张洪博[2] 王岩[1] 

机构地区：[1]华北电力科学研究院(西安)公司,陕西西安710065 [2]西安热工研究院有限公司,宁夏银川750032

出　　处：《清洗世界》2014年第2期4-7,36,共5页Cleaning World

摘　　要：根据某电厂运行锅炉的特点和对其管样进行的小型清洗试验结果，确定了本次化学清洗工艺为复合有机酸酸洗，柠檬酸漂洗，双氧水钝化。复合酸质量分数：4％～6％，柠檬酸质量分数：0．2％～0．5％，双氧水质量分数：0．1％--0．2％。化学清洗结束后，汽包、水冷壁管均已清洗干净；根据清洗管样和腐蚀指示片的测定结果，除垢率为98．1％，腐蚀速率为1．01g/（m2·h），腐蚀总量为16．2g／m2，各项指标均达到了《火力发电厂锅炉化学清洗导则》（DIMT794—2001）中规定的优良标准。金属表面形成完整的、呈均匀深灰色的钝化膜。According to the characteristics of a power plant boiler and the tube like small cleaning re- sults, it determines the chemical cleaning process for composite organic acid washed, citric acid rinse, peroxide passivation. Composite acid concentration is 4% ~ 6%, citric acid concentration is 0. 2% O. 5%, hydrogen peroxide concentration is 0. 1% - 0.2%. When chemical cleaning is finished ,drum and water wall tube is clean. The descaling rate is 98.1%, the corrosion rate of the test piece in the monitoring tube is 1.01 g/（ m2 · h） and the total corrosion amount is 16.2 g/m2 after the determined results of cleaning pipe, either has reached the related standards in guideline for chemical cleaning of fossil plant. Metallic surface formed complete, uniformly dark grey passivation film.

关 键 词：化学清洗 腐蚀速率 腐蚀总量 复合有机酸 

分 类 号：TM621.8[电气工程—电力系统及自动化]