How much catalyst should be removed from the system?
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My unit has a processing capacity of 6,500 tons per day, with a storage capacity of around 480 tons. What is the optimal amount to unload at one time?
The system inventory should not be too low; it must be sufficient to ensure that the inventory in the regenerator prevents the material from returning to the first stage of the cyclone, thus avoiding loss of material. It is also necessary to ensure that the catalyst can flow and be fluidized properly.
The amount of desizing agent depends on the level of activator activity and production requirements; there is no fixed amount.
In fact, there is no fixed amount; it is generally determined based on the specific conditions of one’s own device (such as catalyst activity, fine powder content, heavy metal contamination, etc.)
At our facility, we have unloaded up to 30 percent at most; the issue with the sealing legs isn’t serious. However, the catalysts used for processing heavy oil become severely contaminated and deactivated, requiring frequent replacement, which is time-consuming and costly – not worth it
There shouldn’t be any specific requirements. As long as the device performs at its best after unloading, that’s considered satisfactory
Depending on the operating conditions of the device, specific values may not be available; these should be determined based on the amount of catalyst present, the level of heavy metal contamination, the degree of catalyst wear, and its activity level. If the deactivation is severe and frequent replacement is necessary, could it be that the raw material is of very poor quality or there is an issue with the addition of the metal passivator?
The device is descaled depending on the operating conditions. When the catalyst level rises to a certain extent, due to the large capacity of the system, the amount of catalyst carried in the flue gas increases. The main air demand of the Flowhua system also increases. To reduce this load, it is necessary to remove a certain amount of catalyst; however, too much catalyst cannot be removed, as this would affect the pushing force of the regeneration slide valve and could even lead to leakage of the material. When the metal content is high and activity declines, it is necessary to remove the catalyst and replenish it with fresh catalyst. This post was last edited by mxtao123 on 2009-2-21 06:14.]