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Hallo Christa,<br>
<br>
thanks for your interesting comments.<br>
<br>
The PM 3.0 was an early prototype, manufactured in + 300 units most
of which are still in use.<br>
It gad a vertical axis design and only one motor which drives both
the rasping shaft and plate and the koller/die below.<br>
<br>
The problem was that it needed often "help" to draw in some kind of
voluminous feedstock.<br>
<br>
The new machines are very different and have solved many problems
learnt from the previous.<br>
<br>
Also, there are three versions, all of them more productive than the
first.<br>
<br>
The principle and the high quality is still the same.<br>
<br>
Rolf<br>
<br>
<br>
Am 01.10.2012 00:57, schrieb CHRISTA ROTH:
<blockquote
cite="mid:9CB876E3-1182-49A5-9C02-82DDDCD55D16@foodandfuel.info"
type="cite">
<meta http-equiv="Context-Type" content="text/html;
charset=windows-1252">
Paul, you should have just asked me for info. The Pelletmaker 3.0
from Ecoworxx is the one that I have, it was the only one
available from Ecoworxx in 2010. It is featured in the <span>GIZ-HERA
manual microgasification </span><span><a moz-do-not-send="true"
href="http://www.gtz.de/de/dokumente/giz2011-en-micro-gasification.pdf">http://www.gtz.de/de/dokumente/giz2011-en-micro-gasification.pdf</a>, </span>see
photos and link to their website on page 90. that unit is now
doing work in Malawi, though not for fuel processing. but for
waste management. In 2010 I paid less than 5,000 Euro for the
machine, including a 6 mm and an extra 20-mm die (which is 60 mm
thick!). I don't know current pricing.
<div><br>
</div>
<div>there is another unit in Senegal making Typha-grass-pellets.
both machines were airfreighted to Africa, increasing the cost,
but speeding up the process (220kg). The challenge to get it to
Malawi was that the pallet where the machine is mounted for
transport could not go upright as they only have small cargo
planes flying into the country, so they had to make a special
double pallet and lay the machine flat on the side for the
transport. it still worked. and Ecoworxx handled it all.
<div>For a trial machine to prove a concept it is actually ideal
to have the shredder and the pelletiser in one machine. it is
probably not so appropriate to go on a commercial scale, there
it makes sense to have the two steps separated, depending on
your setting. Ecoworxx has since developed larger capacity
products. </div>
<div><br>
</div>
<div>but if you are not sure that you will actually succeed and
have a market case for pellets in a certain area, that small
machine, that was developed for the German home-owner for
private use is the best you can get. Added advantage is that
you only need 3 KvA, but tri-phase power. But it can do
maximum 50 kg per hour, depending on the material. </div>
<div><br>
<div>and because it is a flat-die machine, it is easy to
exchange the dies to work with different diameters. I have
6, 14 and 20 mm dies, depending on material and what you
want to use it for. </div>
<div>the dies are good quality, but also wear out with time.
The deterioration rate depends again on the material that
you put through, but the dies last far longer than the
chinese versions that you can get relatively cheaply on the
market. </div>
<div><br>
</div>
<div>Yet if you want to go to scale, there are ring-die
machines for larger volumes made in Africa, see again the
manual, next page with photo and reference to website. </div>
<div><br>
</div>
<div>hope that answers most of the questions. </div>
<div>Christa</div>
<div><br>
<div>
<div>Am 30.09.2012 um 15:55 schrieb Paul Anderson <<a
moz-do-not-send="true"
href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>>:</div>
<br>
<blockquote type="cite">
<div>
<div>Rolf,<br>
<br>
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).<br>
<br>
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.<br>
<br>
So I ask: Can you make and sell the pelletizer
unit separately? Prices please.<br>
<br>
I like the ability to have different diameters of
pellets!!! <br>
<br>
Finally, where can we see independent reviewer
comments about your machines? And comparative
info with other pelletizers?<br>
<br>
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?<br>
<br>
Paul<br>
<pre>Paul S. Anderson, PhD aka "Dr TLUD"
Email: <a moz-do-not-send="true" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a> Skype: paultlud Phone: +1-309-452-7072
Website: <a moz-do-not-send="true" href="http://www.drtlud.com/">www.drtlud.com</a></pre>
On 9/30/2012 4:35 AM, Energies Naturals C.B. wrote:<br>
</div>
<blockquote cite="mid:50681269.9010405@gmx.de"
type="cite"> Hallo Paul, Ron and others,<br>
<br>
uniformizing low density fuels and uneven size fuels
has always been a problem.<br>
I found a good solution in the Ecoworxx all-in one
pelletizer.<br>
This is a unique device which has a big hopper on
top and a rasping drum underneath it.<br>
It will reduce virtually any feedstock less than 12
cm diam to particles between 1 and 6 mm.<br>
These fall into a mixing chamber below where the
moisture content is measured and -if too dry- water
is added by an automatic pump. <br>
A second moisture sensor at the entrance to the
dosifying screw regulates the addition of water.<br>
The ground biomass is fed into the flat die press
underneath and leaves it as prime grade pellets.<br>
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!<br>
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.<br>
Our machine is entirely designed and manufactured in
Germany, meets the CE requirements and really works!<br>
<br>
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.<br>
<br>
We just pelletized whole canes of Arundo Donax in
one go into wonderfull hard 6 mm fuel pellets!<br>
<br>
Many more samples have been tested successfully. We
would be happy to test yours!<br>
<br>
No time to visit the fair?<br>
Check <a moz-do-not-send="true"
href="http://www.ecoworxx.de/">www.ecoworxx.de</a>
and if you call or write in my name they will know
your problem !<br>
<br>
Rolf Uhle<br>
<br>
Energies Naturals C.B.<br>
<br>
(sober again, Ron?)<br>
<br>
<br>
<br>
<br>
Am 30.09.2012 05:39, schrieb Paul Olivier:
<blockquote
cite="mid:CAOreFvZehBpobugeLuF2PNccv1-rg9uJe5nkz40hQSA-j-aRmA@mail.gmail.com"
type="cite"> Ron,<br>
<br>
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. <br>
<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
<br>
Thanks.<br>
Paul<br>
<br>
<div>On Sun, Sep 30, 2012 at 9:48 AM, Ronald
Hongsermeier <span><<a
moz-do-not-send="true"
href="mailto:rwhongser@web.de">rwhongser@web.de</a>></span>
wrote:<br>
<blockquote>
<div> Dear Alex, <br>
<br>
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.<br>
<br>
I think my first sentence above applies to
both DD (Imberts or others) and TLUD's. <br>
<br>
regards,<br>
Ronald von der Oktoberfestnähe<br>
<br>
(mein heutiger Name wird nur dann getragen
bei einer Bierleichensichtungsrate von >
1 / Tag ;-) )<br>
<br>
<br>
<br>
<br>
<div>On 29.09.2012 20:55, Alex English
wrote:<br>
</div>
<blockquote type="cite">
<p>Tom,<br>
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.</p>
<p>Combustion was measurably good to very
good nineteen times out of twenty.</p>
<p>So, what indeed is the limit?<br>
Alex</p>
<div>On 2012-09-29 11:47 AM, "Tom Miles"
<<a moz-do-not-send="true"
href="mailto:tmiles@trmiles.com">tmiles@trmiles.com</a>>
wrote:<br>
<blockquote>
<div lang="EN-US">
<div>
<p><span>AD, Paul, Kobus and
others. Many thanks for the
suggestions. </span></p>
<div><span> </span><br>
</div>
<p><span>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. </span></p>
<div><span> </span><br>
</div>
<p><span>Tom </span></p>
<div><span> </span><br>
</div>
<p><b>From:</b><span> <a
moz-do-not-send="true"
href="mailto:stoves-bounces@lists.bioenergylists.org">stoves-bounces@lists.bioenergylists.org</a>
[mailto:<a
moz-do-not-send="true"
href="mailto:stoves-bounces@lists.bioenergylists.org">stoves-bounces@lists.bioenergylists.org</a>]
<b>On Behalf Of </b>Anand
Karve<br>
<b>Sent:</b> Friday, September
28, 2012 11:22 PM<br>
<b>To:</b> Discussion of
biomass cooking stoves<br>
<b>Subject:</b> Re: [Stoves]
Fabricated Burn Barrel TLUDS</span></p>
<div> <br>
</div>
<div>
<p>Dear Tom,</p>
</div>
<div>
<p>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.</p>
</div>
<div>
<p>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. </p>
</div>
<div>
<p>Yours</p>
</div>
<div>
<p>A.D.Karve</p>
</div>
<div>
<p>On Fri, Sep 28, 2012 at 11:42
PM, Tom Miles <<a
moz-do-not-send="true"
href="mailto:tmiles@trmiles.com">tmiles@trmiles.com</a>>
wrote:</p>
<div>
<div>
<p>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?</p>
<div> <br>
</div>
<p>Thanks</p>
<div><span> </span><br>
</div>
<p><span>Tom Miles </span></p>
</div>
</div>
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<br>
<br>
-- <br>
***<br>
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Trustee & Founder President,
Appropriate Rural Technology
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