小管径焊口水溶纸封堵方式影响及应对  

Influences and Countermeasures of Weld Sealing Method with Water-soluble Paper for Small-diameter Tube

作　　者：马世城 祁青福 聂名清 MA Shicheng;QI Qingfu;NIE Mingqing(Hongsheng Electricity and Heating Co.,Ltd.,Jiuquan Iron and Steel Group,Jiayuguan,Gansu 735100,China)

机构地区：[1]酒钢集团宏晟电热公司,甘肃嘉峪关735100

出　　处：《冶金动力》2023年第5期32-35,共4页Metallurgical Power

摘　　要：某电厂超临界机组锅炉垂直水冷壁管短期内连续两次发生爆管泄漏,且两次泄漏均发生在同一根管的同一位置,在锅炉受热面泄漏事故中较为少见。针对两次泄漏的原因进行了分析,并通过试验的方法,证实由于换管时焊口封堵塞纸不规范可能造成管子堵塞而过热爆管,并提出了预控措施。A power plant supercritical unit boiler vertical water-cooled wall tubes had two tube bursting leakages within a short period of time,and the two leaks occurred in the same location on tube,which is relatively rare in the boiler heating surface leakage accidents.The reasons for the two leakages were analyzed,and the test confirmed that it was caused by the irregularity of the weld sealing paper during the replacement of the tube,which may cause the tube to be clogged and overheat,resulting tube bursting.Finally,the pre-control measures were proposed.

关 键 词：小管径水冷壁管 过热爆管 水溶纸 焊口封堵 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]