关键词: 催化裂化装置, 再生器, 旋分系统, 布置方案, 壳体变形, 焊缝开裂, 衬里脱落, 衬里磨损

Abstract:

By using the design parameters of the cyclone system of the regenerator of a domestic 4.2 MM TPY RFCC unit, the schemes of different cyclone group number and cyclone distribution number are completed. It is found that when the flue gas volume is the same, the more cyclone group number, the larger the dilute phase diameter of the regenerator. When the number of cyclone groups is the same, the three-circle arrangement is more compact than the two-circle arrangement, and the dilute phase diameter of the regenerator is smaller. Therefore, it is suggested that the internal cyclone distribution of regenerator in large catalytic plant should be prioritized to choose the three-circle arrangement scheme. At the same time, the corresponding design optimization measures are provided to solve the problems such as deformation of the cyclone shell, weld cracking, inner lining shedding and wear, serious wear of the end device of the dip leg and unreasonable arrangement of the tensioning device in the practical application of the cyclone system of the regenerator. The optimization schemes and measures can effectively reduce the diameter of the dilute phase of the regenerator, save the investment of the unit, extend the service life of the cyclone system, ensure the long-term safe operation of the unit.

Key words: FCC unit, regenerator, cyclone system, arrangement scheme, shell deformation, weld cracking, lining peeling, lining wear