Cyclones with Expansion Chambers

Posted in: , on 4. Mar. 2009 - 18:55

Hello,

I have seen high-efficiency cyclones out there with and without expansion chambers included on the bottom of the cyclone. Not being fimilar with expansion chambers on cyclones, what advantages and disadvantages are there with the high-efficiency cyclones that have these chambers?

Thanks in advance. ■

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Cyclones With Expansion Chambers

Erstellt am 5. Mar. 2009 - 10:40

An expansion chamber would be used where the cyclone feeds a rotary feeder, to allow the collected material to settle and stabilise the feed.

If the cyclone is feeding a silo, an expansion chamber would not be needed.

Michael Reid. ■

Re: Cyclones With Expansion Chambers

Erstellt am 5. Mar. 2009 - 12:11

Thanks for that. I'd wondered as well but had never bothered to ask the question. ■

Re: Cyclones With Expansion Chambers

Erstellt am 9. Mar. 2009 - 06:47

How about in a vaccum system. A rotary airlock is always needed after a cyclone so air does not get pulled from the bottom of the cyclone to re entrain solids in the exit vortex of the cyclone, correct? ■

Re: Cyclones With Expansion Chambers

Erstellt am 9. Mar. 2009 - 11:33

Correct. But also, the R.V needs a steady feed, somewhere for the material to settle, away from the exit vortex, to allow the pockets to fill evenly.

The exit vortex extends beyond the cyclone discharge flange. This is seen clearly in positive pressure systems. ■