How to estimate the main catalytic air volume
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How to estimate the main air flow rate of a catalytic unit? Is it closely related to the amount of char formed? (We know the amount of coking that occurs in our unit, but when we calculate the main air flow by multiplying this value by 12, the result still differs significantly from the actual value. The theoretically calculated value is 120,000 cubic meters, while the actual value is 155,000 cubic meters.) The unit uses a coaxial oxygen-enriched system (with an oxygen content in the flue gas of around 5%). Could any expert give some guidance on how to estimate the required main air flow for this unit? (What determines the main air flow rate of your equipment?) I hope the teachers can provide some guidance. Thank you!
You calculate the main air volume based on the amount of char formed, but you forget that another very important function of the main air is to help fluidize the catalyst!
Teacher, what determines the main air volume setting for you?
Why estimate the main air volume? Is it for calculating values in new installations? In actual operation, adjustments are made based on the operation of the regenerator
In practice, the oxygen content is still used to determine whether the main air volume is appropriate, but the calculation cannot be based solely on the amount of coke produced; as I mentioned, there is also the factor of fluidization that needs to be taken into account!
Just check the oxygen content; it should be 1.5
To determine whether it is complete regeneration or incomplete regeneration, the air consumption index varies; the air consumption index for incomplete regeneration is slightly lower. It is generally 11.5–12.0 m3/kg of coke. The air consumption index for complete regeneration is related to the oxygen content in the regenerated flue gas; the higher the oxygen content, the greater the air consumption index, although the increase is limited. It is generally 12–12.5 m3/kg of coke.