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Stovers and Charists,<br>
<br>
A.D. Karve's message below is very informative. And Priya has sent
this link to an excellent video that you must see if you are
interested in char-making that is bigger than cookstoves,
approximately up to the size of 200 barrels. <br>
<div><br>
</div>
<div><a
href="https://www.youtube.com/watch?v=zowFwJ_a0k0&index=14&list=PLO9IWBWSV1ah7dPoVwc5T0xXxyDZwPpgw&t=2s">https://www.youtube.com/watch?v=zowFwJ_a0k0&index=14&list=PLO9IWBWSV1ah7dPoVwc5T0xXxyDZwPpgw&t=2s</a></div>
<div><br>
</div>
This certainly is TLUD-style pyrolysis. The Karve's refer to the
technology as "Flasher". It is quite different from their earlier
(2002) char-production with retort methods, described in: <br>
<a class="moz-txt-link-freetext" href="http://www.ashden.org/files/reports/ARTI%202002%20Technical%20report_0.pdf">http://www.ashden.org/files/reports/ARTI%202002%20Technical%20report_0.pdf</a><br>
<br>
About pyrolyzing coconut husks, two key notes are: 1) the husks
have the shells with them, and 2) that biomass is well dried by the
sun (video says preference to less than 15% moisture content (MC).<br>
<br>
Congratulations to the Karves. They have clearly shown that coconut
wastes (including husks) can be pyrolyzed in to good quality char.
TLUD-style pyrolyzers of many shapes and sizes should be tested with
coconut husk/shell fuel. I hope that Mangolazi of Malaysia will
soon have additional comments to send to us.<br>
<br>
Paul <br>
<pre class="moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>
Skype: paultlud Phone: +1-309-452-7072
Website: <a class="moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
<div class="moz-cite-prefix">On 12/7/2016 12:43 AM, Anand Karve
wrote:<br>
</div>
<blockquote
cite="mid:CACPy7Sf3KQjMXuaq3zpMdeVZ1TyOCLDn+HYP_xOkEXBrMJD0Ag@mail.gmail.com"
type="cite">
<div dir="ltr">Dear Paul,
<div>it seems that the web page is being reorganized. I have
asked Priya to send the relevant video or its link to you. </div>
<div>The NGO who are converting the coconut husk into char
briquettes operates on a hill, which belongs to the Department
of Forests. All the hills around Pune City had been denuded of
their forest cover. This particular NGO calling itself "Green
Hills" is attempting to plant trees on these hills. The trees
which they have planted, shed their leaves in the post-monsoon
season. Unsocial elements set the leaf litter on fire, which
also damages the trees. Therefore, we demonstrated our
charring process to the trustees of this NGO who started using
our kiln to convert the dry leaves into charcoal. An elected
member of the city council came to know about it and persuaded
the management of this NGO to make charcoal from coconut husk.
They agreed to do so. The coconut shells are delivered to them
together with the husk. The shells are split open into two
halves with the help of a machete. The halved shells are
spread out on the hill side for drying and after drying, they
are subjected to pyrolysis in our kiln. The pyrolysis gas is
burned to produce a clean, smokeless flame, and when the kiln
stops emitting flames, the operator removes the charcoal
formed in the kiln and dowses it with water. The wet char is
then passed on to teams operating the briquetting machines.
The briquettes are again dried under the sun for four days,
before packing and selling them. This charcoal has about 20%
ash and it is as good as foundry grade coke.</div>
<div>The work described above has currently come to a stand
still because of a quarrel among the labourers. One of them
was killed and the others have stopped reporting for work. </div>
<div>Yours</div>
<div>A.D.Karve <br>
</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div class="gmail_signature" data-smartmail="gmail_signature">***<br>
Dr. A.D. Karve<br>
<br>
Chairman, Samuchit Enviro Tech Pvt Ltd (<a
moz-do-not-send="true" href="http://www.samuchit.com"
target="_blank">www.samuchit.com</a>)<br>
<br>
Trustee & Founder President, Appropriate Rural
Technology Institute (ARTI)<br>
</div>
</div>
<br>
<div class="gmail_quote">On Tue, Dec 6, 2016 at 7:34 PM, Paul
Anderson <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> A.D.,<br>
<br>
Thanks for pointing that out. I remember your kiln
approach but had forgotten about its use with conconut
husks.<br>
<br>
I went to your website and entered the U-Tube button, but
I did not find the specific one you mention. Please send
a specific link.<br>
<br>
Also, please send more details about the actual operations
for the drying and charring of the fresh husks. <br>
<span class=""> <br>
Paul<br>
<pre class="m_-6447634401863496193moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a moz-do-not-send="true" class="m_-6447634401863496193moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>
Skype: paultlud Phone: +1-309-452-7072
Website: <a moz-do-not-send="true" class="m_-6447634401863496193moz-txt-link-abbreviated" href="http://www.drtlud.com" target="_blank">www.drtlud.com</a></pre>
</span>
<div>
<div class="h5">
<div class="m_-6447634401863496193moz-cite-prefix">On
12/6/2016 1:53 AM, Anand Karve wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Dear Paul,
<div>I think that I had already reported that we
had developed a kiln (based on the same
principle as our Sampada Stove, which is
basically TLUD) for making charcoal from
agricultural waste. See our web site <a
moz-do-not-send="true"
href="http://www.samuchit.com" target="_blank">www.samuchit.com</a>.
It has a button for U-Tube, which would activate
videos of various technologies developed by us,
including the charring kiln. The city, where I
live, generates daily about 30 tons (fresh
weight) of coconut husk. An NGO gets this husk
delivered to them free of transport cost. They
dry the husk, and using our kilns and briquette
extruders, this organisation makes char
briquettes, which are used as smokeless cooking
fuel. </div>
<div>Yours</div>
<div>A.D.Karve </div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div
class="m_-6447634401863496193gmail_signature"
data-smartmail="gmail_signature">***<br>
Dr. A.D. Karve<br>
<br>
Chairman, Samuchit Enviro Tech Pvt Ltd (<a
moz-do-not-send="true"
href="http://www.samuchit.com"
target="_blank">www.samuchit.com</a>)<br>
<br>
Trustee & Founder President, Appropriate
Rural Technology Institute (ARTI)<br>
</div>
</div>
<br>
<div class="gmail_quote">On Mon, Dec 5, 2016 at
8:30 PM, Paul Anderson <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:psanders@ilstu.edu"
target="_blank">psanders@ilstu.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Dear
Mangolazi, (and especially all Stovers who
live in areas where coconuts grow.)<br>
Also sending to the Biochar Listserv because
of biochar production discussion.<br>
<br>
Great to hear of your experiences with
coconut husks!!<br>
<br>
Many of us (including myself) have tried to
use coconut husks as fuel in TLUDs (or other
stove types). I believe that you have just
reported more success than anyone else, but
perhaps others can correct me about that.<br>
<br>
What you describe is "typical". But you
have allowed the husks to smoulder more,
giving smoke that does not burn, or burns
poorly. AND you report that after allowing
that to happen, that you have "some good
biochar" (which I hope can be analyzed
someday to confirm your judgement.). <br>
<br>
AND you report some minor use of the heat.<br>
<br>
Can we assume that your two photos are taken
during the early stage while there are still
fronds or perhaps even diesel fuel being
burned? I would like to know more about
your smokiness.<br>
<br>
You have the advantage of living in an area
that produces coconuts and the husks are
plentiful. Please continue your efforts.
They are very important, considering the
quantities of husks around the world and the
need for biochar in the tropics.<br>
<br>
Please consider doing some experiments and
reporting back about your results.<br>
<br>
1. You wrote:
<blockquote type="cite">
<pre>but it gets smoky once the only the husks are burning. </pre>
</blockquote>
Please try with a mixture of fronds in with
the husks all the way through the barrel of
fuel. Do this with known (approximate)
percentages of fronds (by weight or simply
by volume). Is 20% fronds functional?
Maybe 40% fronds? And confirm that 100% or
80% fronds will pyrolyze cleanly (with
combustible smoke). I do not know of anyone
who has done this.<br>
<blockquote type="cite">
<pre>Most of the fuel consists of semi-dry brown-green husks</pre>
</blockquote>
Here you can repeat experiments with husks
with various degrees of dryness. If with
reasonable success with "mostly dried" or
"highly dried" or with some amount of
"semi-dry brown-green husks", then that is
further progress. YOU get to make up
whatever classification system seems to
describe "dryness." You can even "oven
dry" some husks. <br>
<br>
Also, when you have determined something
useful about dryness, we can discuss having
a "dryer" device that will use the heat from
the TLUD barrels to do the drying of the
future batches of husks.<br>
<br>
Objectives: <br>
A. Produce biochar<br>
B. Elimimate (remove or dispose of) piles
of discarded husks.<br>
C. Elimimate (stop) the rotting and
off-gassing of methane and CO2 from the
discarded husks.<br>
D. Everntually claim carbon credits for the
A and C above.<br>
E. Ultimately find a way to have useful
heat while doing A through D above.<br>
<br>
I am almost finished (need another week?)
with a document about making conveniently
simple barrel-size TLUDs in a style that I
personally like. I will send it to you
(Mangolazi) as a separate message. Soon it
will be on my website and announced to the
Listservs.<br>
<br>
We all look forward to more info about your
work. Also please tell us about yourself,
location, employment, goals, family, etc.<br>
<br>
Paul<br>
<br>
<pre class="m_-6447634401863496193m_-253874525526826946moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a moz-do-not-send="true" class="m_-6447634401863496193m_-253874525526826946moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>
Skype: paultlud Phone: +1-309-452-7072
Website: <a moz-do-not-send="true" class="m_-6447634401863496193m_-253874525526826946moz-txt-link-abbreviated" href="http://www.drtlud.com" target="_blank">www.drtlud.com</a></pre>
<div
class="m_-6447634401863496193m_-253874525526826946moz-cite-prefix">On
12/4/2016 10:23 PM, Mangolazi wrote:<br>
</div>
<blockquote type="cite">
<pre>Hi stovers,
I've been making some big TLUDs to turn farm waste into biochar as well as using the heat for cooking. I'm using oil drums with a chimney made from stacked paint cans; the fuel consists of dried coconut husks (not copra or coconut shells) and chopped coconut fronds. I pack the fuel into the drum as tightly as possible and light it off with diesel-soaked coconut fronds on top.
Has anyone used these items as TLUD fuel for cooking or heating? I find the mixture burns cleanly at first, thanks to the quick and furious burn from the diesel and fronds, but it gets smoky once the only the husks are burning. Most of the fuel consists of semi-dry brown-green husks because it takes a long time for husks to dry down to a uniform dark brown color. I can get some good biochar after a 1.5-hour burn.
My cooking attempts are limited to putting a small pot on the TLUD lid for simmering. It would also be possible to wrap copper tubing around the oil drum as a heat exchanger to heat water. In coastal Malaysia, coconut husks are usually left to very slowly break down into compost; it would be interesting to use it to replace LPG for simmering and as a heat source for small village enterprises.</pre>
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