Sawdust size <6 mm to 8 mm Sawdust moisture 10-20% MC Tom Miles
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Paul S. Anderson Sent: Friday, June 03, 2011 6:46 AM To: Discussion of biomass pyrolysis and gasification; Thomas Reed Cc: Hugh McLaughlin Subject: Re: [Gasification] Sawdust in Fan TLUD Dear All, I totally agree with Tom Reed's comments (below). Particle size is subjective, and some people call sawdust what I would call small shavings. If you can see the curl in the cut of the wood, that material can probably be used in a Fan Assisted (FA) TLUD. I and others have done that on experimental basis. I know of nobody focused on "sawdust" in TLUDs. Too much air could create channels or what Tom R. called "spouted." At Chip Energy, Paul Wever and I have successfully used some mixtures of sawdust with other larger-sized fuels, but not successfully with 100% sawdust even when we used compressed air to be sure to be able to blow through the fuel pile. To date, the only consistently successful "small particle" fuel in a TLUD-FA is rice husks. That work is credited to Alexis Belonio in the Philippines, and much further work by Paul Olivier in Vietnam. So, I suspect that wood particles as small as rice husks could be successfully used in a TLUD-FA. But sawdust does not come in such nicely uniform particles of that size. Somebody is asking. I hope we hear of their interests and experiences. I say frequently: We only know about 20% of what is available to be learned about TLUD pyrolytic gasifier devices. There is so much yet to do and learn. All are encouraged to join in these efforts. Paul -- Paul S. Anderson, PhD Known to some as: Dr. TLUD Doc Professor Phone (USA): 309-452-7072 SKYPE: paultlud Email: [email protected] www.gtz.de/de/dokumente/giz2011-en-micro-gasification.pdf (Best ref.) Quoting Thomas Reed <[email protected]>: > TM > > Depends greatly on the sawdust particle size and moisture content. > With very coarse sawdust should work ok. > > With a small fan you may get no penetration. With a larger fan you > are likely to get a spouted of fluidized bed. > > Tom Reed > > Dr Thomas B Reed > President, The Biomass Energy Foundation > www.Woodgas.com > > On Jun 3, 2011, at 8:55 AM, "Tom Miles" <[email protected]> wrote: > >> TLUD-ites, >> >> >> >> Does anyone have experience gasifying sawdust in a fan powered >> TLUD? Continuous feed? >> >> >> >> Tom Miles >> >> >> >> _______________________________________________ >> 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/ > ---------------------------------------------------------------- This message was sent using Illinois State University RedbirdMail _______________________________________________ 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/
