NG-M701F-R型余热锅炉高压过热器爆管原因分析及解决办法  

Cause analysis and solution for tube burst in high-pressure superheater of NG-M701F-R heat recovery boiler

作　　者：张俊伟 ZHANG Junwei(Shenzhen Guangqian Electric Power Company Limited,Shenzhen 518054,China)

机构地区：[1]深圳市广前电力有限公司

出　　处：《华电技术》2019年第7期46-49,共4页HUADIAN TECHNOLOGY

摘　　要：NG-M701F-R型余热锅炉高压过热器在运行初期多次发生爆管,严重影响了机组的安全运行。从机组运行方式、减温水、焊接、结构、烟气5个方面对爆管原因进行了分析,认为周期性热应力、减温水流量超量程、焊接质量不合格、管束结构不合理、旋转烟气流是导致高压过热器爆管的主要原因。通过优化机组运行方式、加强高压过热器检修工作的管理、增加补偿弯管、加固余热锅炉模块的防振支架并装设防振梁,达到了防止高压过热器爆管的目的。There were several tube bursts in the high-pressure superheater of NG-M701F-R heat recovery boiler during its initial operation,which seriously affected the safety of the unit.Cause analysis is conducted from operation mode,desuperheating water,welding,structure and exhaust gas of the unit.It is convinced that periodic thermal stress,over-range desuperheating water flow,poor welding quality,unreasonable structure of tube bundles and rotating exhaust gas flow are the main reasons. By optimizing operation mode of the unit,strengthening management of high-pressure superheater maintenance,adding compensation bend,reinforcing the anti-vibration bracket and installing anti-vibration beam,tube in the high-pressure can be protected from burst.

关 键 词：NG-M701F-R 余热锅炉 高压过热器 爆管 减温水流量 焊接质量 管束结构 旋转烟气流 

分 类 号：TK223.32[动力工程及工程热物理—动力机械及工程]