Length of the catalyst cracking centrifugal discharge pipe
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In catalytic cracking, centrifuges are installed in both units. As can be seen from the diagram, the discharge pipe of the first-stage centrifuge is longer while that of the second-stage centrifuge is shorter. Logically, the particles in the first-stage centrifuge should be larger and those in the second-stage centrifuge smaller; therefore, the discharge pipe of the first stage should be shorter and that of the second stage longer. I’m not sure where the problem lies – please advise, experts.
I think it should be determined based on the solid content of the catalyst, as well as the large amount of catalyst that is separated by centrifugation; hence it needs to be longer so that it can quickly enter the dense-phase bed. There are relatively few bipolar particles, so it needs to be shorter