一台DZL6.0-1.25蒸汽锅炉水冷壁管爆管事故的分析与改进  

Analysis and Improvement of Design Defect in a Blowdown System of Sidewall Header

作　　者：陈开潮[1] 宋建彪[1] 缪正清[1] 田子平 勇继军 何华 顾金良 陆永德 

机构地区：[1]上海交通大学,上海200030 [2]江苏省张家港市劳动局,张家港215600 [3]江苏省张家港市羊毛衫厂,张家港215600

出　　处：《工业锅炉》2001年第5期43-46,共4页Industrial Boilers

摘　　要：从对一台ＤＺＬ６．０－１.２５蒸汽锅炉近前炉门附近两侧炉膛水冷壁管多次发生局部爆管事故的调查出发，对该锅炉侧集箱排污系统存在的设计缺陷进行了流动分析、计算。计算表明，排污时前段集箱内流速过低是造成该段集箱区水渣大量沉积致使该区水冷壁管因水渣堵塞而引发局部爆管的根本原因。对侧集箱不同部位增开排污口方案进行的计算表明，在集箱前端增开排污口可有效地改善排污时该处集箱内水的流动性，从而消除泥渣沉积隐患。改造方案实施后，经多年的锅炉安全运行实践也证明了该方案的有效性。Based on the investigation of local tube rupture, occurred several times in sidewall tube near front furnace door, the hydrodynamic analysis and calculation have been done to a blowdown system of sidewall header in a DZL6.0-l.25 steam boiler. It may be seen from the calculation that the essential reason is much lower velocity in the front section to re-sult in local tube rupture of watewall tubes connected to that section of header. The retrofit project has been proved from the calculation of the retrofit project that the lowdown hole in the front of header could effectively improve the water fluidi-ty in that aver of header during blowdown, removing the hidden danger of incrust ant deposition. After carrying out the retrofit project. the boiler has been operated several years safely. It has proved that the project is effective and successful.

关 键 词：蒸汽锅炉 事故分析 侧集箱 排污 水冷壁管 爆管 DZL6.0-1.25型 

分 类 号：TK288[动力工程及工程热物理—动力机械及工程] TK223.32