How to address secondary combustion or afterburning
Thread Content
How to address secondary combustion or afterburning?
1. Reduce main air volume 2. Increase processing capacity 3. Add CO as an oxidizing agent
First, determine whether it is oxygen-poor regeneration or oxygen-rich regeneration. Add an oxidizer, carry out oxygen-enriched regeneration, increase the regeneration temperature, raise the main air volume, and reduce recycle. Oxygen-deficient regeneration reduces the main air volume
By reducing the main air volume and increasing the processing volume, shouldn’t the amount of coke produced be greater? Won’t the charring effect be worse and the afterburning more severe?
Why does oxygen-deficient regeneration reduce the main air volume?
By reducing the oxygen content, secondary combustion cannot occur, allowing carbon monoxide to burn in the furnace
Both secondary combustion and afterburning are caused by a lack of sufficient residence time, or insufficient temperature! This is the root cause; to address it, it’s essential to find the reasons based on the characteristics of one’s own device – that’s the real solution!
What I mean is incomplete regeneration; excessive afterburner treatment results in carbon buildup, so it’s essential to pay close attention to the changes in various parameters during the processing
Our system features pre-coking for oxygen-enriched combustion; the simplest method is to use carbon monoxide as a combustion aid to enhance the coking intensity. Additionally, within a controllable range, appropriately reduce the amount of fresh catalyst added, increase the amount and temperature of coking, raise the main air flow rate, and enhance the coking process. If the temperature in the dilute phase is too high, it is necessary to reduce the processing volume and increase the main air flow; if required, the feed should be stopped to keep the temperature within the designed range.
Stopping the feed processing is a serious situation indeed; try not to stop the feed supply if possible