Very good, Rolf. This is the way to go. Thanks so much.
On Sun, Sep 30, 2012 at 4:35 PM, Energies Naturals C.B. < [email protected]> wrote: > Hallo Paul, Ron and others, > > uniformizing low density fuels and uneven size fuels has always been a > problem. > I found a good solution in the Ecoworxx all-in one pelletizer. > This is a unique device which has a big hopper on top and a rasping drum > underneath it. > It will reduce virtually any feedstock less than 12 cm diam to particles > between 1 and 6 mm. > These fall into a mixing chamber below where the moisture content is > measured and -if too dry- water is added by an automatic pump. > A second moisture sensor at the entrance to the dosifying screw regulates > the addition of water. > The ground biomass is fed into the flat die press underneath and leaves it > as prime grade pellets. > You can change the die in 10 minutes and have the choice to produce 6 -8 > -12- 16 -20 -and 25 mm pellets on the same machine! > It doesn´t come from China, though because despite the price advantage, > all the units I saw never met the quality standard for trouble free use. > And you cannot move away from them because they have to be fed continuously. > Our machine is entirely designed and manufactured in Germany, meets the CE > requirements and really works! > > If you are interested, come to the Expobioenergia fair in Valladolid/Spain > on 23-25.Oct. this year where we shall expose two working units. > > We just pelletized whole canes of Arundo Donax in one go into wonderfull > hard 6 mm fuel pellets! > > Many more samples have been tested successfully. We would be happy to test > yours! > > No time to visit the fair? > Check www.ecoworxx.de and if you call or write in my name they will know > your problem ! > > Rolf Uhle > > Energies Naturals C.B. > > (sober again, Ron?) > > > > > Am 30.09.2012 05:39, schrieb Paul Olivier: > > Ron, > > You bring up a very good point here. If the biomass is uniform, granular > and dry, it becomes very easy to process in a TLUD. That is why it is so > appealing to work with biomass that is already uniform, granular and dry, > such as rice hulls and coffee husks. > > But if we have biomass that is not uniform, granular and dry (such as > straw, pine needles or sawdust), then we might think about drying and > pelletizing it. In this way we have a top-quality gasifier fuel. This > allows us to take full advantage of both the biochar and gas. In the case > of rice hulls and coffee husks, the gas has a much greater commercial value > than the biochar. In making biochar it is such a pity to waste the gas. > > Also when we pelletize biomass, the bulk density can reach as high as 600 > kgs/m3. This means that if we use a gasifier for purposes of household > cooking, the height of the reactor has to be only a fraction of the height > of a reactor utilizing undensified biomass such as rice hulls (of a bulk > density of less than 100 kgs/m3). If we do not change the height of the > reactor, then cooking times per batch can last three or four hours. When we > have thousands of households and small business using gasifiers, then we do > not have to think about making biochar as an independent activity. > > I really like small pellets of a diameter of about 6 mm. Of course there > is the cost of buying a pellet machine. But they are quite cheap out of > China. And there is the cost of electricity or fuel to make the pellets. > But this cost is easily offset by the value of the syngas produced. Even in > a poor country such as Vietnam, it is easy to buy pellets in local markets. > > Thanks. > Paul > > On Sun, Sep 30, 2012 at 9:48 AM, Ronald Hongsermeier <[email protected]>wrote: > > Dear Alex, > > I haven't carefully read the whole thread but haven't seen granularity of > fuel addressed. Isn't that what makes a lot of difference in the flame/gas > quality ( along with the moisture content, of course ) and determines the > necessity of either using or not using forced air? Regarding Dr. Karve's > drums I'm wondering how careful everyone is in emphasizing fuel moisture > and particularity/uniformity issues in using these tools. > > I think my first sentence above applies to both DD (Imberts or others) and > TLUD's. > > regards, > Ronald von der Oktoberfestnähe > > (mein heutiger Name wird nur dann getragen bei einer > Bierleichensichtungsrate von > 1 / Tag ;-) ) > > > > > On 29.09.2012 20:55, Alex English wrote: > > Tom, > I guess it may depend on what you consider a clean burn. My experiments > focused the gases through a smaller out let pipe and then added the > secondary air. So for a two foot diameter drum the pipe was three inches > in diameter. Air was introduced near the top having only half that > distance to penetrate, and combustion occurred in a six inch diameter > chimney , six feet tall above. > > Combustion was measurably good to very good nineteen times out of twenty. > > So, what indeed is the limit? > Alex > On 2012-09-29 11:47 AM, "Tom Miles" <[email protected]> wrote: > > AD, Paul, Kobus and others. Many thanks for the suggestions. > > > > What is the largest practical size (kg fuel/hr, kW) for a single TLUD with > a clean stack for heat recovery? There must be a limit to the air > penetration to get a clean gas burn form a natural draft stack or even a > fan driven TLUD. > > > > Tom > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Anand Karve > *Sent:* Friday, September 28, 2012 11:22 PM > *To:* Discussion of biomass cooking stoves > *Subject:* Re: [Stoves] Fabricated Burn Barrel TLUDS > > > > Dear Tom, > > we regularly supply charring kilns made out of used 55 gallon drums. The > kilns are based on the TLUD principle. The cost of a kiln plus an extra > barrel for storing the char, is about US$100. We have sold more than 100 > such kilns in India and have also trained a number of persons from India > and Africa. These kilns are so easy to manufacture, that we ask the > trainees to photograph and take measurements of our kiln so that they can > copy the design. In many instances, people buy a kiln from us, because they > feel that their local fabricator would be better able to copy the design > from an actual object than from a blue print or a photograph. > > The advantage of using 55 gallon drums is that used drums are available at > a relatively low cost, and the kilns are portable. Instead of transporting > the biomass, one transports the kiln to the location where the biomass is > available, and brings back only the charred material, which weighs only a > third as much as the biomass. > > Yours > > A.D.Karve > > On Fri, Sep 28, 2012 at 11:42 PM, Tom Miles <[email protected]> wrote: > > Am often asked if there is a burn barrel sized TLUD that is commercially > fabricated. We’ve seen some great DIY with Doug’s Jolly Roger and others. > Is anyone fabricating a 55 gal drum sized TLUD that can be used for regular > biochar production? If so, what is the cost and availability? > > > > Thanks > > > > Tom Miles > > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > > > -- > *** > Dr. A.D. Karve > Trustee & Founder President, Appropriate Rural Technology Institute (ARTI) > > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > > > _______________________________________________ > Stoves mailing list > > to Send a Message to the list, use the email > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web > pagehttp://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web > site:http://www.bioenergylists.org/ > > > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1427 / Virus Database: 2441/5298 - Release Date: 09/29/12 > > > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > > > > -- > Paul A. Olivier PhD > 27C Pham Hong Thai Street > Dalat > Vietnam > > Louisiana telephone: 1-337-447-4124 (rings Vietnam) > Mobile: 090-694-1573 (in Vietnam) > Skype address: Xpolivier > http://www.esrla.com/ > > > _______________________________________________ > Stoves mailing list > > to Send a Message to the list, use the email > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web > pagehttp://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web > site:http://www.bioenergylists.org/ > > > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > -- Paul A. Olivier PhD 27C Pham Hong Thai Street Dalat Vietnam Louisiana telephone: 1-337-447-4124 (rings Vietnam) Mobile: 090-694-1573 (in Vietnam) Skype address: Xpolivier http://www.esrla.com/
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