火电厂锅炉内壁结垢与腐蚀酸洗技术应用浅析  

Application of Pickling Technology in Fouling and Corrosion of Boiler Inwall of Thermal Power Plant

作　　者：钱焕云[1] QIAN Huan-yun(Nantong Tianshenggang Power Station Co., Ltd. Nantong 226003, China)

机构地区：[1]南通天生港发电有限公司,江苏南通226003

出　　处：《全面腐蚀控制》2017年第11期5-9,64,共6页Total Corrosion Control

摘　　要：本文简述了针对火电厂锅炉内壁结垢及腐蚀的酸洗方案初选、确定、实施及效果验证,最后指出:锅炉内壁结垢不均匀会导致磷酸盐隐藏,引发电偶腐蚀;电偶腐蚀可酸洗消除;不含奥氏体钢的系统,采用"盐酸+助溶剂+硫脲+缓蚀剂"循环清洗、除盐水冲洗、柠檬酸漂洗和二甲基酮肟钝化工艺,效果较好。In this paper,the author describes the primary selection,determination,implementation and validation of pickling scheme for fouling and corrosion of boilers in thermal power plants briefly,finally point out:Boiler inwall uneven fouling will lead to phosphate hiding,cause galvanic corrosion.Galvanic corrosion can be eliminated by pickling.In the system without austenite steel,the process of cycle cleaning with hydrochloric acid+solvent+thiourea+inhibitor,demineralized water washing,rinsing with citric acid and DMKO passivation process,has a better effect.

关 键 词：酸洗 结垢 腐蚀 锅炉 火电厂 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]