Analysis and Countermeasure of Internal Leakage of Bottom of Stabilizer in Catalytic Unit
The 1 million tons/year catalytic cracking unit of Yan'an Refinery has been corroded and leaked in pipelines and equipment since May 2017.Among them,the reboiler at the bottom of the stable tower has been leaking twice since December 2017.After consulting a lot of data and combining with the actual analysis,it is believed that the internal leakage of the stabilizer bottom reboiler is due to the formation of S-H2S-RSH high temperature corrosion environment.After determining the cause of internal leakage,analyzing and evaluating the internal composition of sulfur,high temperature and reboiling materials,the company decided to adopt the method of upgrading the material of E-303 tube bundle to solve this problem.Through a series of measures such as replacing the reboiler,the normal production of the device is realized and the long cycle operation is facilitated.
万方数据
维普
