Catalytic reaction temperature control?
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The current reaction temperature of this unit is controlled at 508–511 degrees. The amount of terminator (coker gasoline) used is 4 tons per hour, while the fresh feed amount is 55 tons per hour (of which 20 tons per hour are heavy residue and 35 tons per hour are wax oil). The amount of slurry fed back for reprocessing is 10 tons per hour. Could the current reaction temperature be too high, resulting in the spent catalyst containing oil? (The reserve in the stripping section has experienced slight fluctuations recently).
It is necessary to check the visual signs of charring of the regenerant recently, as well as whether its carbon content has increased.
It will not cause the slurry to become oily; this problem only occurs when the reaction temperature is below 480 degrees
Whether to use oil or not should be determined by taking an overall view of the entire situation
Other influencing factors should be considered.
Throw it that high? Did your light receive 70? The reaction depth isn’t very great! It is recommended to increase the reaction depth and raise the reagent-to-oil ratio to observe the coking effect of the regenerant
Throw it that high? Did your light receive 70? The reaction depth isn’t very great! It is recommended to increase the reaction depth and raise the reagent-to-oil ratio to observe the coking effect of the regenerant
If the reaction temperature is below 430 degrees, the catalyst will exhibit capillary oiling. Also, a low stripping temperature results in incomplete stripping, which should also be considered as oil contamination.
The original poster is referring to the amount of recycled oil slurry, not the amount of oil slurry discharged externally! Don’t you do catalyst sampling? Under normal conditions, the raw catalyst is only slightly gray in color and may have a slight odor of oil and gas! If it’s severe, the catalyst will glow – this is an obvious sign! If oil is present during the operation, you will find that the regeneration temperature rises, while the oxygen content decreases; once the conditions for burning off the oil are no longer met, the regeneration temperature drops!