Oxygen-poor process in catalytic cracking
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There was a refinery that originally used oxygen-enriched regeneration at a capacity of 600,000 tons per year; it was upgraded to an oxygen-depleted regeneration process with a capacity of 1 million tons per year, which reduced operating costs. But as far as I know, in refineries where oxygen levels are low, a make-up burner is usually installed before the flue gas exhaust system to ensure an adequate oxygen level; however, this refinery does not have such a make-up burner. As a result, there is almost no oxygen in the flue gas, along with high levels of carbon monoxide! Could everyone please tell me if making such a change is considered a violation?
Such modifications involve adding a CO burner in front of the waste heat boiler to ensure that flue gas emissions meet the standards.
The situation you mentioned is oxygen-enriched regeneration; it’s not the same as the oxygen-depleted regeneration you described, right?
The left and right sides of the CO incinerator are used not only to ensure that flue gas emissions meet the standards but also to recover the heat of combustion of CO
If a carbon monoxide incinerator functions properly, it can significantly reduce the energy consumption of the facility! The key is to ensure stable operation; otherwise, large fluctuations can cause serious damage to the equipment!
It is sufficient to ensure that there is no CO before the flue gas is discharged. As for the lack of a replenishment machine, just use the incinerator. Direct discharge is definitely non-compliant
These are the two typical methods of catalytic regeneration. Generally, an CO burner is used following oxygen-deficient regeneration, while a preheating boiler is used after oxygen-enriched regeneration； They are all combinations that can recover thermal energy.
This post was last edited by Refiner on 2020-2-17 09:13. But they won’t install it……they think there’s too much steam, so it’s useless, and the cost of incineration is too high!
How to deal with the remaining carbon monoxide without a afterburner?
Let me tell you straight: they simply don’t have incinerators! Such companies also lack credibility entirely! ! ! !