Rolf,
Yes, we would like to know the prices. This Listserv is not for
commercial purposes, but you can certainly inform us of the prices here
because so many people want to know. And not all want the USA
prices. Basic price where manufactured. And I want to know about
getting units in eastern Africa (specifically Uganda).
Question: Wouldn't it make more sense to have the
chopping/shreading/grinding to be done separately from the machine that
does the pelletizing? That would allow the user to make appropriate
mixtures for the pellets.
So I ask: Can you make and sell the pelletizer unit separately?
Prices please.
I like the ability to have different diameters of pellets!!!
Finally, where can we see independent reviewer comments about your
machines? And comparative info with other pelletizers?
As we (generic we because there are several efforts) advance with TLUD
stoves in eastern Africa, there could be considerable market for
appropriately priced and reliable pelletizing equipment. Small units are
fine. Labor costs are so low, so it is vastly different from the USA
and Europe situations. Do you have any representation in Africa?
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 9/30/2012 4:35 AM, Energies Naturals C.B. 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] <mailto:[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]
<mailto:[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]>
[mailto:[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] <mailto:[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
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Vietnam
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