Regenerator combustion efficiency
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The regenerator has a high reserve capacity; during the desulfurization process, the bed temperature of the regenerator rises, as does the temperature of the dilute phase. How can this phenomenon be explained?
I remember that when we unloaded the regenerator, there was no significant change in the bed temperature. Are there other factors affecting the phenomenon of tail burning? It’s still like this every time the agent is removed
The amount stored is too high, which affects the burning process; the limited space makes proper combustion difficult. By removing some of the material, the burning area increases, allowing better contact with air, which in turn improves the burning process. Reduce the amount stored
This post was last edited by dqkwb on 2017-7-14 at 17:16; it’s possible that the regenerator did not burn properly, resulting in incomplete combustion of some of the coke. The charring effect improved after discharging part of the agent. This phenomenon generally occurs easily during oxygen-deficient regeneration. I’ve never heard of oxygen-enriched regeneration. It is also possible that after some of the catalyst is removed, the catalyst circulation speed increases, leading to incomplete combustion; as a result, heat cannot be dissipated in time, which also causes the temperature to rise.
You are likely experiencing oxygen-deficient regeneration; it is probably at the moment of agent removal that the main air flow rate is low, resulting in excessive carbon deposition. Once the agent removal is complete, the degree of oxygen deficiency decreases, allowing the carbon deposits to burn more effectively. This raises the bed temperature, and the lower the amount of carbon deposit, the higher the dilute-phase temperature generally is
It will be fine once most of it has been unloaded; as the storage amount increases, the carbon content also increases. With no change in air volume, such problems are bound to occur
You’re increasing the burning intensity and the residence time, but I can’t say what’s causing the high level of residue; I hope there’s no oil or gas present. There are too many factors such as adjustments to the stripping effect or the atomization effect at low temperatures
This phenomenon may be caused by an excessively low reserve volume, which results in the main airflow staying in the bed for a short time; as a result, some of the carbon monoxide cannot burn within the bed and is carried directly by the main airflow to the dilute-phase combustion zone. Another possibility is bed drift, which leads to an accumulation of large amounts of catalyst that has not been properly regenerated in certain areas of the regenerator.
After you remove the agent, the space increases, the relative oxygen content rises, the charring effect improves, and the temperature naturally goes up!