华电技术 ›› 2019, Vol. 41 ›› Issue (7): 46-49.

• 技术交流 • 上一篇    下一篇

NG-M701F-R型余热锅炉高压过热器爆管原因分析及解决办法

  

  1. 深圳市广前电力有限公司,广东深圳〓518054

  • 出版日期:2019-07-25 发布日期:2019-08-08

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

  1. Shenzhen Guangqian Electric Power Company LimitedShenzhen 518054China

  • Online:2019-07-25 Published:2019-08-08

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。

关键词:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">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

Abstract:

There were several tube bursts in the highpressure 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 modedesuperheating waterweldingstructure and  exhaust gas of the unit.It is convinced that periodic thermal stressoverrange desuperheating water flowpoor welding qualityunreasonable structure of tube bundles and rotating exhaust gas flow are the main reasons. By optimizing operation mode of the unitstrengthening management of highpressure superheater maintenanceadding compensation bendreinforcing the antivibration bracket and installing antivibration beam, tube in the highpressure can be protected from burst.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">NG-M701F-R, heat recovery boiler, highfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">pressure superheater, tube burst, desuperheating water flow, welding quality, structure of tube bundles, rotating exhaust gas flow