Effect of raw material changes on the dilute-phase density of the regenerator
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This post was last edited by Refiner on 2017-11-1 19:12. In our plant, when the amount of slag added increases or when the feed oil tank is changed, the dilute-phase density in the regenerator sometimes rises to varying degrees. Have you encountered this issue in your plant? What changes in the raw materials can affect the dilute-phase density of the regenerator? I hope to receive guidance from all the teachers. Thank you!
Personally, I think it’s still your main air distribution and the level of recycled material that have an impact. What affects regeneration due to raw materials is the large amount of green coke, as well as higher temperatures. It has little to do with the catalyst density
There are no changes in the main air distribution or the regenerator level; it’s mainly the change in raw material that causes a change in the dilute-phase density – this has been determined through long-term observation!
After the properties of the raw material change, does the main air flow rate also change? The phenomenon you’re referring to is likely that when the properties of the raw material become more severe, the amount of coke produced increases; accordingly, a higher main air flow rate is required, which leads to an increase in the dilute-phase density
As long as the temperature doesn’t rise too much and the catalyst doesn’t get damaged, it should be fine; the regenerator has plenty of space for sedimentation. The dilute phase density is the material level height, which is related to the main air flow rate. Are you performing oxygen-poor regeneration or oxygen-rich regeneration?
I’ve caught the essential key elements of the problem! :lol{:2_36:}
I’ve noticed recently that you ask quite a few questions, and they’re all quite in-depth, which is great. It’s clear that some of these observations are the result of your own careful observation and analysis! Actually, when I was first learning*, I went through a similar stage as you. My mentor told me to use the concept of the three balances on my own to figure out these problems and improve my ability to analyze and make judgments! For example, take this question: you mentioned that the raw materials become heavier, and in such a case it is necessary to use the concept of heat balance for analysis. The raw material weight is high; in order to ensure proper burning, the air supply is increased. With the same feed amount, the increase in air supply leads to an increase in the combustion rate. As a result, the dilute-phase density increases! So my rating for the refinery worker moderator is spot-on; it captures the key factors of the issue! This is just the accumulation of experience~!