PG9171E燃气轮机余热锅炉高压过热器爆管原因分析  

Tube Burst Analysis for High-pressure Superheater in HRSG of PG9171E Gas Turbines

作　　者：任强[1] 姬抱平[1] 

机构地区：[1]河北钢铁集团邯钢公司能源中心,河北邯郸056015

出　　处：《发电设备》2015年第2期125-128,共4页Power Equipment

摘　　要：针对PG9171E燃气轮机配套的余热锅炉在运行初期高压过热器高温段多次发生爆管泄漏问题,严重影响机组的安全运行,从焊接、减温水、结构等方面对爆管原因进行详细分析,认为焊接质量、减温水量、管束结构是影响过热器爆管的主要原因。实践证明:采取补偿弯管和加强焊接质量控制的方式进行改进,改造效果良好,达到机组安全运行的目的。During early operation stage of the heat recovery steam generator（HRSG）matching PG9171 E gas turbines,tube burst failures were frequently encountered in the high-temperature section of its high-pressure superheater,which seriously affected the safety of unit operation.Detail analysis was conducted to the causes of tube burst from the aspects of welding,attemperating water and structure,etc.,after which the failures were found to be caused by poor welding quality,inappropriate attemperating water flow and unreasonable structure of the tube banks.Improvement measures were taken to the unit,such as adding reinforcement elbow and strengthening the control of welding quality.Retrofit results prove above measures to be effective,by which safety operation of the unit is achieved.

关 键 词：余热锅炉 高压过热器 爆管 焊接 

分 类 号：TK229.929[动力工程及工程热物理—动力机械及工程]