What is the cause of overheating in the back route after complete catalytic regeneration? Is there any way to solve it?
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What is the cause of overheating in the back route after complete catalytic regeneration? Is there any way to solve it?
Was an oxidizer added? The temperature of the regenerative bed must be at an appropriate level; it cannot be too low or too high. The oxygen content in the flue gas, as well as whether the amount of primary air supplied is sufficient, determine whether CO can burn completely within the bed layer. The cones and the lines in the pre-heating section are loose; check whether there are any breaks in the instrument pipelines. If there are breaks, adjust the differential pressure between the two devices appropriately while ensuring proper fluidization. Uneven distribution of the main wind and the bed layer can also cause this phenomenon
Tail combustion. Add an oxidizer regularly to keep the temperature difference between the dilute and dense phases within 5°C. Raise the dense-phase temperature of the regenerator to above 680°C. Control the high inventory in the regenerator. Increase the temperature of the external heat exchanger return to the regenerator, etc
An oxidizer is added, but the temperature rises when a catalyst is used, with the oxygen content in the flue gas at 4–5%.
The temperature of the completely regenerated bed is around 700°C; a CO combustion aid is also added. The temperature in the dilute phase ranges from 710 to 720 degrees, sometimes higher, while the oxygen content in the flue gas is 4–5%.
I don’t know if the low flue gas temperature issue has been resolved； Generally, the main air volume is reduced while the bed temperature is increased ； Increase the preheating temperature of crude oil ； Add an appropriate amount of combustion accelerator’
With the bed temperature controlled at such a high level, should we use two regeneration stages?
Add the fresh catalyst in small amounts multiple times
Please confirm the effectiveness of the oxidizer you have added. I’ve encountered a similar situation before: by switching to another oxidizer, without making any other adjustments, the bed temperature dropped by more than ten degrees.
We are undergoing complete regeneration; what is the appropriate temperature for preheating the raw materials? We are around 260, and we also add an oxidizer