[Stoves] Fabricated Burn Barrel TLUDS

Sun Sep 30 04:37:05 CDT 2012

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. <
energiesnaturals at gmx.de> 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 <rwhongser at web.de>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" <tmiles at trmiles.com> 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:* stoves-bounces at lists.bioenergylists.org [mailto:
> stoves-bounces at lists.bioenergylists.org] *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 <tmiles at trmiles.com> 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
>
>
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> --
> ***
> Dr. A.D. Karve
> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>
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> --
> 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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-- 
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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