Re: Type A Materials
dear rahul,
Wooddust :
- particle size between 30-50 micron
- particle density < 1400 kg/sec
(Although not so safe)
Why using the expensive nitrogen?
Air is 79% nitrogen. Use air instead and correct later for the different properties.
Air is cheaper than nitrogen.
take care
teus ■
Teus
Re: Type A Materials
Dear Teus,
Thank you for your reply. Currently, i am using coal in an experiment. I couldn't fluidize coal due to channel formation and spouting. Therefore, i started looking for other materials which can be fludized/transported easily.
I am using Nitrogen to avoid reactions/explosions in the glass tank.
You suggested wood powder and also mentioned that it is not safe to use. Is it also not safe to use with Nitrogen? Is there a place where i can order around 25 kgs of wood powder (Type A, ie, around 50 um and 1400 kg/m3)?
Thanks in advance.
With best regards,
Rahul ■
Re: Type A Materials
Dear Rahul,
Using nitrogen is harmless.
Coal has a particle density of approx 2800 kg/m3 (> 1400 kg/m).
Wood powder will be lighter than 1400 kg/m3
In that case you can also try fly ash or cement or gypsum or calciumcarbonate, etc., ground to the desired size.
Woodpowder or dust can be obtained from a timber workshop (saw dust) or a powerplant burning waste wood.
The other products from an aggregate supplier ?
BR teus ■
Teus
Gr-A Material
power station fly ash (especially, taken from the last rows of ESPs), cement should be good.. calcium carbonate can also be conveyed as a Gr-A material, but sometimes it could get "sticky" (cohesive) ■
Re: Type A Materials
Dear Teus and ssm672,
Thanks a lot for the information. I already tried milk powder with Nitrogen. It went well. So far so good.
With best regards,
Rahul ■
Re: Type A Materials
no worries Rahul..
if you dont mind sharing, could you please able to share what solids loading ratio you could achieve, the inlet velocity of air at feed point (& pipe length etc), any information on blockage boundary??
Many thanks ■
Re: Type A Materials
Hi SSM672,
i didn't try pneumatic transport yet. I am only trying to fluidize the stuff.
Regards,
Rahul ■
Type A materials
Does any one know about materials which fall under Type "A" of Geldart classification. I am searching for cheaper, safe to use materials which fall under this category to do lab scale experiments. I am using Nitrogen as a carrier gas to test these materials for pneumatic conveying.
Thanks in advance.
Regards,
Rahul ■