循环流化床锅炉旋风分离器中心筒失效分析  

Failure Analysis of Central Barrel of Cyclone Separator in Circulating Fluidized Bed Boiler

作　　者：谭雄健 覃健彬 吴榉洋 韦炳聪 李志刚 Tan Xiongjian;Qin Jianbin;Wu Juyang;Wei Bingcong;Li Zhigang(Guangxi Zhuang Autonomous Region Special Equipment Inspection and Research Institute,Nanning 530029)

机构地区：[1]广西壮族自治区特种设备检验研究院,南宁530029

出　　处：《设备监理》2023年第1期43-47,共5页Plant Engineering Consultants

基　　金：广西市场监管局科技项目“高温高压蒸汽管系应力分析与支吊架优化调整方法研究”(GXSJKJ2021-13);“锅炉异种钢接头电解腐蚀技术研究”(GXTJ-20211105)。

摘　　要：文章采用宏观检查、化学元素分析、金相分析、硬度检测、力学性能分析、断口分析方法,对某循环流化床锅炉的旋风分离器中心筒奥氏体不锈钢母材及筒节环形对接焊缝裂纹进行失效分析。分析结果表明,其失效的原因为焊接工艺达不到要求,且材料长期高温运行后导致脆性过大、塑性下降。最后,根据失效原因提出相应措施和建议。For the central barrel of cyclone separator in the circulating fluidized bed boiler,the failure analysis was carried out to the base metal used austenitic stainless steel and the crack in girth welds,by means of macro inspection,chemical element analysis,metallographic analysis,hardness testing,mechanical property analysis and fracture analysis.The analysis results show that the failure reasons are that the welding process can not meet the requirements,the brittleness increased and plasticity decreased of the material after long-term and high-temperature operation.According to that,the measures and suggestions are put forward.

关 键 词：旋风分离器 中心筒 失效分析 奥氏体不锈钢 

分 类 号：TB496[一般工业技术]