Analysis of the Failure Causes of the Tube Bulge and Cracking in the Radiation Section of the Tew Ethane Cracking Furnace
The ethane cracking furnace of an ethylene plant is HQF-G Ⅳ type cracking furnace designed by China Huanqiu Contracting & Engineering Co.,Ltd..The design service life of the furnace tube in the radiating section is 10.0 years.In the actual operation of 3.5 years,10 bulge and 2 of which have cracke d and failed,which seriously affected the safe operation of the ethylene plant.In view of the situation that the service life of the furnace tube in the radiation section of the ethane cracking furnace is seriously lower than the design value,the failure causes of the furnace tube are analyzed through macro analysis,chemical composition analysis,stress analysis,hardness detection,CFD simulation analysis,energy spectrum analysis and scanning electron microscope analysis.The results show that the furnace tube failure due to the long-term service in the uneven temperature field,the high temperature causes the deterioration of the metal material structure,and at the same time,the joint action of thermal stress and distortion stress leads to the deformation of the local area of the furnace tube,resulting in high temperature creep.
万方数据
维普
