Why does the flue gas volume increase after reducing the load in catalytic cracking?
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In the flue gas desulfurization unit, why does the amount of flue gas undergoing regeneration increase after the plant’s load is reduced?
Is it that when oxygen reacts with carbon, the high original load results in the formation of carbon dioxide; now, due to a decrease in volume and pressure, a large amount of carbon monoxide is produced, resulting in an overall increase in the amount of gas generated
This post was last edited by dqkwb on 2017-5-19 at 10:21. c+O2=cO2, 2c+O2=2CO – these are formulas; such equations apply only in situations where there are significant changes in the oxygen content and carbon monoxide levels.
That’s what I think: the amount of smoke is related to the main air flow rate; when the main air flow rate is high, there is more smoke, and it has nothing to do with whether the load is reduced or not.
Another possibility is that a decrease in flue gas density and an increase in flue gas volume are caused by an increase in regeneration temperature, despite no change in the main air flow rate after load reduction
It’s difficult to answer this question since there are no particularly specific operational data available. The following are possible. 1. Although the load is reduced, if the reaction depth increases, the amount of coke formed increases, as does the total amount of coke; meanwhile, the consumption of main air increases and the volume of flue gas also increases. 2. The regeneration mode is oxygen-enriched operation; after the load was reduced, the operation parameters were not adjusted in a timely manner, resulting in an oxygen-deficient operation and an increase in flue gas volume.
Now, flue gas desulfurization is carried out online, and the data on flue gas emissions can be monitored through this online system
I think if the main air flow remains unchanged after reducing the load, then it is related to charring