Abstract: The increase of pressure drop of regenerator in continuous catalytic reforming unit will directly affect the normal production of the unit. In view of the high pressure drop caused by the internal strainer blockage of the regenerator in a continuous catalytic reforming unit in a domestic refinery, the reasons for the increase of pressure drop were analyzed from the aspects of the operating process of the regeneration system, structural features of the regenerator and manufacturing process. The results showed that excessive wear of catalyst and improper operation of production process were the direct causes of internal strainer blockage and pressure drop increase, while the inherent defects of axial screen structure and manufacturing process used in the internal strainer were the indirect causes. By cleaning the internal strainer, optimizing the operation of drying system and elutriating system, the hidden trouble of internal strainer blockage of the regenerator was eliminated.

Key words: continuous catalytic reforming, catalyst, regenerator, internal strainer