Fine Particles Aeration / Feed System
markz,
From the information that you provided, it would seem that a uniform feed of fine particles to your analyzing equipment would be possible.
I assume the fine particles are not being mixed with another material in the bin and that aeration is necessary only for flow promotion and / or blending. Aeration can be accomplished with air pads mounted inside the bin, or with an attached blender cone that uses pulsed air to blend / aerate the material.
The take-away system could be a vacuum system, yes, but a pressure system delivering primary air to a solids (venturi) eductor would seem to be the right answer here.
If this fine material is combustible you may want to use nitrogen in the bin and in the conveying system.
My thoughts,
Dennis Hauch ■
Re: How Air Take-Away Work?
Dear Markz,
if dispersing of material really necessary I would recommend our high-pressure nozzle for this purpose (see attached pict.)
This nozzle dispers the fine matrial with a small amount of pressurized 6 barg air.
Normally we use it for dispersing sorbens into a duct or boiler to achieve higher efficiency of used sorbens.
In case of collecting and take away system we agree with Dennis to use an eductor.
If you have further questions please contact us:
schneider@enviro-engineering.de or visit our website: http://www.enviro-engineering.de
Regards Klaus Schneider
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Will This Work
Hi Dennis and Schneider,
Thank you so much for the help. The particles we are try to convey are very low volume, it could be as low as 0.5ml.
Do you think the concept in the attached figure will work.
The reason I chose it is that we want to keep a contant (or a controllable) powder consentration.
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Will This Work
Hi Dennis and Schneider,
Thank you so much for the help. The particles we are try to convey are very low volume, it could be as low as 0.5ml.
Do you think the concept in the attached figure will work.
The reason I chose it is that we want to keep a contant (or a controllable) powder consentration.
thank you!
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How Does The Air Take-Away System
We solved a similar problem painting a granular
bulk material by very fine powder ( dry painting ).
We used a small standard bunker with screw
discharge and a simple air nozzle installed on the
output of the screw.
Small amount of the compressed air dispersed the
powder.
So, you can get a regulated & constant fed mixture,
which can be taken away by a vacuum system.
Michael Rivkin ■
Re: How Air Take-Away Work?
For a constant solids feed rate it wil be better to use a feeding device such as a rotary valve. Since the solids loading is so low, the conveying line itself will function as a mixer. Vacuum type conveying system should be preferred. You can use a fan if the pressure drop in the system comes out to be about 1 psi.
Regards,
Amrit Agarwal (Tim)
Pneumatic Conveying Consultants
www.powderandbulk/pcc.com
polypcc@aol.com ■
How air take-away work?
Hi, we are trying to design a system which can disperse very low volume fine paricles inside of surge bin (silo) by aeration, then
use a vacuum conveying method to dilever those particles to an
analyzing equipment.
Is this idea possible? How does "air take-away" work? Can this
system maintain uniform feed rate of particles?
Please give some advise!
Thank you! ■