Function of the catalyst collector (below the reactor)
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Is the lift between Reactor 2 and Reactor 3 of UOP’s 3rd-generation moving bed achieved using L-valve banks? Is there a collector below the reactor, and why is this collector necessary in the PDH process?
#Here, a quick reply: #Inter-unit lifting is also achieved using L-valve assemblies； There is also a catalyst collector at the bottom of the reactor. The design includes the passage of purge gas (normal H2) through this collector, which comes into contact with the catalyst in the opposite direction. The purpose of this is, firstly, to blow away any oil and gas that may be present on the catalyst, and secondly, to cool the catalyst in order to meet the requirements of the L-valve assembly (around 150 degrees).
Thank you for the reply from above. In other words, the temperature increase caused by catalyst L valve assembly cannot be too high? A collector is necessary. Is the purge gas discharged by mixing with the reaction material and entering the downstream reactor, or is it sent directly to the outlet of Reactor 4?
In Jinan’s catalytic reforming process, valveless conveying is used, and the catalyst collector has been eliminated; could it have been unnecessary from the very beginning?