Running catalyst issue
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Why is the total storage amount low during the normal production process of the catalytic device?
It is likely due to catalyst wear, or the reduced stability of the catalyst caused by an excess of steam; this leads to a decrease in the catalyst’s sieving capacity, and as a result the catalyst is lost along with the flue gas and oil gases. This is about catalyst loss; you might find what you need here: http://bbs.hcbbs.com/viewthread.php?tid=247038 http://bbs.hcbbs.com/viewthread.php?tid=131779
It might be a problem with the cyclone separator, which has caused severe wear of the catalyst and a reduction in its particle size.
The reasons for catalyst loss should be analyzed from multiple aspects, such as: 1. Poor quality of steam or the presence of water, which leads to hydrothermal deactivation and thermal decomposition of the catalyst. 2 Observe the pressure drop and density changes in the primary and secondary centrifuges. 3 Appropriate main air volume; is the density of the main air distribution pipes normal? The poster should also determine whether the catalyst loss comes from the settler or from the regenerator by testing the catalyst content in the flue gas and slurry. Then analyze the reasons for the running loss.
During normal operation, the catalyst is subjected to collisions and friction during fluidized coking and transportation, as well as friction with the equipment; as a result, part of the catalyst turns into fine powder. Additionally, some of it undergoes thermal decomposition due to contact with water vapor in the regenerator and reactor, which also produces fine powder. This fine powder is carried away with the flue gas and oil gases, thereby reducing its amount available. If the reserve level drops rapidly and there is significant loss through the chimney, it may be due to a problem with the cyclone or abnormal operation resulting in large fluctuations in air volume.
The catalyst has worn out. When the catalyst particles burn again, they get damaged; secondary combustion occurs in the dilute-phase bed, which carries the catalyst particles into the flue gas. Additionally, the oil and gas from the reactor also contain some catalyst, resulting in a decrease in the total amount of catalyst in the regeneration system.