[Stoves] Fabricated Burn Barrel TLUDS

Energies Naturals C.B. energiesnaturals at gmx.de
Sun Sep 30 02:35:37 PDT 2012


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 
> <mailto: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
>>     <mailto: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>
>>         [mailto: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 <mailto: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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