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HELP! About CFB

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Old   May 8, 2001, 13:09
Default HELP! About CFB
  #1
l.xie
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Hi,

I am designing a circulating fluidized bed(CFB) at laboratory scale. I found many large CFBs use two gas inlets: a vertical primary gas inlet, where gas is blown from the bottom of the bed(air distributor),and a horizotal secondary gas inlet, which is very near the gas distributor.

Is there anyone who can tell me what is the use of the secondary gas inlet?

Thanks.
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