Seeking expert help: issues with regeneration in a catalytic unit with two counter-current regeneration stages
Thread Content
Experts, please help answer this: In a two-stage counter-current regeneration process, the design calls for oxygen deficiency in the first stage and oxygen enrichment in the second stage. What differences will arise if, in actual operation, oxygen enrichment occurs in the first stage and oxygen deficiency in the second stage?
It has been oxygenated repeatedly; how can it become oxygen-poor again? This kind of thing cannot happen in your case
Our main air supply is provided separately in stages one, two, and three
You don’t understand the difference between oxygen-enriched regeneration and oxygen-depleted regeneration; oxygen-enriched regeneration is a complete regeneration. Carbon is completely burned into carbon dioxide. There’s no more carbon left; how can there be low oxygen levels?
There are also many forms of regeneration. In your area, is it series-parallel or parallel connection, or a combination of both?
One, two, and then three are connected in series: the catalyst enters first, followed by one more stage, and then it passes through the semi-regulating valve, the external regulating valve, and the distribution plate before reaching two and then three
Repeated oxygen depletion and repeated oxygen enrichment are mainly considerations based on operational needs! If you are enriching with oxygen repeatedly, the first thing to consider is whether the volume in question is sufficient to carry out the oxygen-enrichment process If it’s possible, is there any need to go back again? Secondly, by repeatedly reducing the oxygen level, it is possible to adjust the coking intensity according to production requirements, thereby indirectly controlling the catalyst’s activity!