Art, this sounds very close to what I want to do and I cannot find it done!
I want to make pellets without having to pelletize. After my very good experience with almond shells ( m/l 30 x 20 mm) passing readily through 3 and 3.5 " (75 and 90 mm) spiral augers and around bends, I want to stamp wood chips on a rotating cilindrical die into " coins" of some 15 -20 mm diam. I imagine some kind of hollow cylinder with holes and a matching, synchronized cylinder with short hardened steel punches stamping the chips thru those holes . The stamped chips fall out of the hollow die and what has not been stamped runs around for another chance... Why does this machine not exist ? Rolf Am Samstag, 4. Juni 2011 21:19:26 schrieb Art Krenzel: > Pete, > > Have you looked into gear compression pelletizer? Several years ago at the > Port of the Tri Cities in Oregon, I saw a sawdust pelletizer made of two > large gear wheels (about 18 inches in diameter) which were heavily spring > loaded together and driven by a highly geared down electric motor. I > believe only one gear wheel was driven with the other acting as an idler. > They acted as a "nip roller" in the real world. They formed a semi solid > pellet about two inches long and about 5/8 inch in diameter. > > Sawdust was augured to a hopper above where the gear wheels meshed and self > fed into the gears. The gear faces measured approximately two inches > wide. > > The pellets were not of the same high density as the extruder pelletizers > make but if your purpose is only to use the straw on site, this might work > for you. They were handling the pellets with a bucket loader and auger. > Some of the pellets broke down in handling but the bulk of them remained > in good shape. > > It was simple, quiet and did not have a very large electric motor driving > it. > > Art Krenzel > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of Pete > > & Sheri > > Sent: Friday, June 03, 2011 9:01 AM > > To: 'Discussion of biomass pyrolysis and gasification'; 'Thomas Reed' > > Cc: 'Hugh McLaughlin' > > Subject: Re: [Gasification] Sawdust in Fan TLUD > > > > Could one possibly semi-pelletize the sawdust directly at the input to > > the gasifier? I see pellet makers that use a screw extrusion method. If > > one could get enough compaction to loosely hold the particles together, > > right at the input point, then there wouldn't be the "spouting" discussed > > previously. There also wouldn't be all that pressurized air to deal with. > > The compacted material would also create a "seal" between the gasifier > > and the outside world, if needed. > > > > Pete Stanaitis > > -------------- > > > > > > > > > > > > _______________________________________________ > > 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.bioen > >erg 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.bioen > >ergylists.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/
