Dear Panniselvam I'm glad to hear that Toplit updraft pyramids are used in your part of the world. It is new here.
Tom Reed Dr Thomas B Reed President, The Biomass Energy Foundation www.Woodgas.com On Jun 5, 2011, at 9:30 PM, "Pannirselvam P.V" <[email protected]> wrote: > Helo Tom reed > > In thailand , India the pile of such sticks from fast growing bush into > a dense pyramid and light a fire on the top layer, it behaves like the Toplit > Updraft stove and burns down, pyrolysing the wood in each layer to make > 15-20% charcoal .This is what you correcly named and call this pile a > "Pyromid" ( but this term has been used also for another product , i wish to > call pyropyramid reactor; some are covered with saw dust or sand > > The Dalit , the poor people ,survive from semi arid tropical in south > India perfected this natural Top lift reactor well as moisture content > even after drying is problems, they used some combination of recycle of > charcoal sticks in this pile as feed stocks; > thus reducing the pyrolysis time , increasing the overall charcoal yield > and reducing the time , space liitle de they have , > Thus realy this simple pyropromids are futher well done to recycle urban > solid waste into charcoal in many cities > > Yet these technolgy can be as altrenate to energy intensive pellets , or > chip making > > yet all pyrogas are wasted in this practicall easy pyro reactors, but can > be recoverded too by simple tecnology > > Yours truely > > Panniselvam P.V > Brazil > > > > > > On Sun, Jun 5, 2011 at 5:47 PM, Thomas Reed <[email protected]> wrote: > There is almost as much energy or even more, in the brush of deciduous trees > as in the main trunk. And every time you cut down a tree you get a big pile > of brush which needs to be burned or hauled to the dump. > > I have developed an attachment for chainsaws that will reduce a 5 foot tall > pile of brush to a 1 foot pile of worth sticks in 15 minutes. See it in > action at > > http://www.woodgas.com/brushsaw.htm > > <><><> > > When laying up a pile of brush for further cutting, put ratchet straps on the > ground first, and use them to compress the pile by a factor of 2-3 and make > the sticks and branches more parallel for cutting. It's easy to cut a pile > into 1-3 foot long pieces to be used for burning or charcoal. > > <><><> > > If you pile these sticks into a dense pyramid and light a fire on the top > layer, it behaves like the Toplit Updraft stove and burns down, pyrolysing > the wood in each layer to make 15-20% charcoal. I call this pile a "Pyromid" > ( but this term has been used also for another product). > > Onward > > Tom Reed, Pyrologist > > > > Dr Thomas B Reed > President, The Biomass Energy Foundation > www.Woodgas.com > > On Jun 4, 2011, at 7:14 PM, Rolf Uhle <[email protected]> wrote: > > > I have pelletized and i know how it works. > > It is o.k. as long as you have good clean sawdust at a reasonable price. > > > > The thing is most people don't ! > > > > I make chips from brushwood and treetops at a reasonable price. > > The chip quality is a bit mediocre, though and I want to refine it so as to > > keep it from bridging. Cut the long bits short and make it look more round > > or > > square, then it will flow ! > > I am happy with a density of 400 kg/m³ instead of 650 for pellets as long > > as i > > don't have to ship them far away. > > > > > > If torrefaction wasn't so expensive at small scale, it would be a good > > solution. > > > > Rolf > > > > > > > > > > > > > > Am Samstag, 4. Juni 2011 23:39:42 schrieb Art Krenzel: > >> Rolf, > >> > >> I do not know why other machines like it were never made. That was the > >> only machine of that design I have ever seen. I think the quality of the > >> end product pellets did not make it through the long distance, multiple > >> handling systems sufficiently well to meet the needs of the end user. > >> They were sort of "heavily squished" rather than extruded with a melted > >> lignin total outer coat. This left the pellet much more susceptible to > >> handling damage. The process was operated in full recycle mode until the > >> gears heated up before any product was made to facilitate the heat > >> pressing of the sawdust. > >> > >> I would seriously review using a hollow cylinder with a piston to compress > >> the sawdust. It does not do well in the "rock in the sawdust" test. > >> Most, if not all, pelletizing processes need alot of cleanup of the floor > >> area with brooms and shovels used by minimum wage help. This swept up > >> material is normally added to the feed side of the system and could cause > >> serious maintenance difficulties. The gears were spring loaded and just > >> bounced open sufficiently to pass any incompressible foreign matter. > >> > >> The gear pelletizer system was incredibly quiet. The loudest noise came > >> from the auger and the loader (when it was running). > >> > >> Art > >> > >>> From: [email protected] > >>> To: [email protected] > >>> Date: Sun, 5 Jun 2011 00:16:15 +0200 > >>> Subject: Re: [Gasification] Sawdust in Fan TLUD > >>> > >>> 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.b > >>>>> ioen 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.b > >>>>> ioen 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.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/ > > _______________________________________________ > 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/ > > > > -- > ************************************************ > P.V.PANNIRSELVAM > ASSOCIATE . PROF. > Research Group ,GPEC, Coordinator > Computer aided Cost engineering > > DEQ – Departamento de Engenharia Química > CT – Centro de Tecnologia / UFRN, Lagoa Nova – Natal/RN > Campus Universitário. CEP: 59.072-970 > North East,Brazil > ******************************************* > https://sites.google.com/a/biomassa.eq.ufrn.br/sites/ > and > http://ecosyseng.wetpaint.com/ > > > Fone ;Office > 84 3215-3769 , Ramal 210 > Home : 84 3217-1557 > > Mobile :558488145083 > > Email: > [email protected] > [email protected] > [email protected] > [email protected] > > > > _______________________________________________ > 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/
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