摘要
对CO_2再生塔入口处导流筒频繁损坏的原因进行了研究。采用SEM技术分析失效件的微观形貌特征;用能谱仪检测失效件表面的腐蚀产物;运用Ansys Workbench软件对入口处流体的流动特性进行数值模拟,分析了不同流量条件下的流体压力、流速、湍动能及耗散率。综合数值模拟与实物检测结果表明:腐蚀产物中未发现304L不锈钢应力腐蚀的敏感元素且未发现腐蚀导致的壁面减薄现象;断口微观形貌特征表现为疲劳辉纹;流体在再生塔入口处出现较大的力及能量损失,流体流量的波动使流体冲击到导流筒表面的作用力随时间变化,从而导致导流筒疲劳损坏。
The causes of the frequent failure of the guide tube at the inlet of a carbon dioxide regeneration tower was studied. The microstructure characteristics of the failure parts were analyzed by means of SEM and the surface corrosion products of the failure parts were detected by means of energy dispersive spectrometry. The fluid flow characteristics, namely fluid pressure, flowrate, turbulent kinetic energy and dissipation rate, at the inlet were simulated by means of the Ansys Workbench software. The results of the simulation and sample detection showed that, there were relatively strong force and energy loss at the inlet of the regeneration tower in the process of fluid flow, and the acting force on the guide tube surface due to the fluctuation of the fluid flowrate varied with time, which leaded to the fatigue damage of the guide tube.
出处
《石油化工》
CAS
CSCD
北大核心
2016年第12期1533-1538,共6页
Petrochemical Technology
基金
中国石油天然气股份有限公司资助项目(DQSH-2015-JS-95)
中国石油和化学工业联合会科技项目(2016-01-02)
关键词
CO2再生塔
导流筒
流场
疲劳
失效
CO2 regeneration tower
guide tube
flow field
fatigue
failure
