Hi, I have a design problem that i am really struggling with. My maths isn't perfect but i am trying. Basically i need to design a cyclone system to recover dust with flow rate 1.5m3/s loading 250g/m3. the recovery to be achieved is 0.1g/m3

I have been looking at the stairmand high efficiency design (but dont know how to apply it to the data i have)

The gas is at 600 degree C and the dust density is 2600kg/m3
I have a dust particle size distribution between 1 and 12.5um with 50% below 2.25um (again not sure how to use this)

I'm assuming dust is in normal air so (nitrogen and oxygen).

I have been looking at this for a while and so tink i have the equations but just cant work out what to do. I also am not confident in making assumptions to put inot the equations. Any help would be really appreciated

Thanks Dave

OK.. Talking about scaling factors for cyclone design (I think)

This calculation was taken from a text book that works though an example but this doesnt make sense to me.

Flow rate = 4000/3600 = 1.11m3/s

Area of inlet duct at 15m/s = 1.11m3/s / 15 = 0.07m2

(the area = 0.5Dc x 0.2Dc (Dc relates to the scaling factor for the cyclone design but not sure how it was calculated from the information given))

how does Dc=0.84

So confused