Jeff, I am not familiar with this mill but I'll bet we can make it work! Truly, keep everything in the milling and collection system at less than atmospheric pressure. Post a sketch of the guts of this mill: (it's seems like the discharge is under pressure; the blower should be the last component in the stream to maintain keeping the micronized charcoal IN the milling system. Trust me on this!
Good luck ( I just finished a project with 30-micron particles! Best, Mark -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Davis Sent: Friday, August 26, 2011 8:22 PM To: Discussion of biomass pyrolysis and gasification Subject: Re: [Gasification] Charcoal Reduction Mill Thanks Mark, I was looking at this JD hammer mill: <http://www.ebay.com/itm/JOHN-DEERE-HAMMERMILL-CASE-BAGGER-ATTACHMENT-/11073 2088998?pt=LH_DefaultDomain_0&hash=item19c82596a6> Jeff On Thu, 2011-08-25 at 21:14 -0700, Mark E. Ludlow wrote: > A small hammer mill would be fine, but you need to run it under > negative pressure to keep from making a mess. Start at the back end > with a small blower good for 12" suction. Then a fake baghouse (three > old Shopvacs in parallel would be fine.) Then, a tall skinny, cyclone > (high-efficiency) with a downleg terminated with a couple butterfly > valves operating 90deg out of phase as an airlock. This dumps into > your collection bag/drum. > > Of course, any kind of feed auger makes things more fun. Get a fine > screen for the mill and don't push things to prevent a conflagration > which would ruin anyone's day. The cyclone is about 99% efficient by > weight, so it takes the load off your "baghouse". > > An even simpler solution is a homebrew ball or rod mill. > > Mark _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenerg ylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/ _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
