Two-stage regeneration overlap and two-stage incomplete regeneration overlap techniques
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As the title suggests, domestic catalytic technologies use a two-stage regeneration process in which the two stages are not completely overlapping, while UOP’s catalytic technology employs a two-stage regeneration method with overlapping stages. I would like to ask those who are experts in catalysis: what are the similarities and differences between these two technologies?
You are referring to one type, namely two-stage regeneration of flue gas: incomplete in the first stage and complete in the second stage. The difference is that in UOP, heat steam is added in one section (in a backmixing manner), while the steam used to supply heat from one section to the next is equivalent to the heat steam used in the second section. UOP repeatedly uses the main air distribution plate to lift the flue gas to the secondary bed layer. Domestically, the main air distribution ring is used repeatedly, and the flue gas enters directly at the bottom of the secondary bed layer.