<div dir="ltr">Crispin - many thanks for the new suggestion.<div><br></div><div>I have found source of firebricks and fire cement in Surabaya. PT. BENTENG API TECHNIC - they seem to be a very large facility. Shipping costs to Bali more than the product!</div><div><br></div><div>Small centrifugal blowers seem to be used all over the place here by sate vendors cooking with charcoal.</div><div>I have not quite envisaged where the cook will fit in this type of design, I assume the blower and sawdust feed would come in from the side or middle of something like a rocket stove burn chamber, with a small fire inside to keep things burning?? with the exhaust coming out at the top to the cook.</div><div><br></div><div>It is well worth investigating this approach for this application or our other pet project a forge..... maybe able to do it without charcoal...</div><div><br></div><div>Your 2 new key words (Sawdust combustor) unleashed the power of googles search engine.</div><div><br></div><div>This interesting looking device from India looks like it gasifies the sawdust in the burner tube and then uses the gas to maintain the in tube gasification process without using any bricks:<br></div><div><a href="http://mgiri.org/wp-content/uploads/2014/05/Sawdust_Combuster.pdf">http://mgiri.org/wp-content/uploads/2014/05/Sawdust_Combuster.pdf</a><br></div><div><br></div><div> What would be your vote??</div><div>Try to burn the sawdust outside the flow tube in a burn chamber? </div><div>or gasify the sawdust inside the tube as in this india example and burn the gases?</div><div><br></div><div>In the meantime I don't want to give up totally on fuel management (pelletizing) as it is a solution that can create micro enterprises in the area particularly if rice husks are put in the picture. Though these days the pigs seem to be very happy consuming most of that.</div><div> Hopefully I get some ideas on that front from the stove community.</div><div><br></div><div>Great Ideas thanks for the feedback</div><div> </div><div>TonyV</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr">Tony Vovers</div><div>+1 281 7381000 (VOIP)<br>+62 (813) 3888 9062 (HP)</div></div></div></div></div>
<br><div class="gmail_quote">On Wed, Mar 15, 2017 at 1:09 AM, Crispin Pemberton-Pigott <span dir="ltr"><<a href="mailto:crispinpigott@outlook.com" target="_blank">crispinpigott@outlook.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Dear Tony</div>
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<span style="font-size:initial;line-height:initial;text-align:initial">One of the good uses of sawdust when you have electricity is a simple fan and sawdust combustor. </span></div>
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<span style="font-size:initial;line-height:initial;text-align:initial">If you start a fire and spray air containing sawdust into it, you can get a really hot clean fire. It will probably be best to do it against a ceramic wall, like fire brick. </span></div>
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<span style="font-size:initial;line-height:initial;text-align:initial">The bricks are available from Jakarta, if you are patient. They are used on Lombok to make combustors for palm kernel shells so you may find them easily in Bali. </span></div>
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<span style="font-size:initial;line-height:initial;text-align:initial">The burners that work this way use quite high pressure (centrifugal) fans, not the propeller type. The sawdust is dropped into a hole so it is picked up by the air and carried into the
fire. </span></div>
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<span style="font-size:initial;line-height:initial;text-align:initial">In short, the fuel is not loaded into the stove, it is blown in a little at a time. </span></div>
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<span style="font-size:initial;line-height:initial;text-align:initial">Because it is an institutional stove, you can use the fire power. There are such small fans widely used by Lombok blacksmiths among others. They are all 450 watts because that is the
limit for a residential home (2 amps).</span></div>
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<span style="font-size:initial;line-height:initial;text-align:initial">It would be easy to check. You might be able to lead a pipe into the fire chamber and fill it with sawdust, loosely. As it burns at the bottom, it will fall down. The fan will burn only
the bit exposed at the bottom. Build a structure around it. </span></div>
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<span style="font-size:initial;line-height:initial;text-align:initial">Regards </span></div><span class="HOEnZb"><font color="#888888">
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<span style="font-size:initial;line-height:initial;text-align:initial">Crispin </span>
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<div>Dear stovers</div>
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<div>Looking for some advice or suggestions to utilise a source of excess sawdust for institutional cookstoves at a school. in Indonesia.</div>
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<div>After several attempts with various devices to burn the sawdust directly have failed to be accepted by the kitchen over time I am now looking to better fuel management as the solution.</div>
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<div>Looking for simple lowcost options for Pelletizing or making briquettes from the sawdust.</div>
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<div>In various postings I have found reference to managing sawdust/husk fuel using cowdung as a binding material and simple screw or lever based press to create briquettes or cakes that are dried.</div>
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<div>Although dung is locally available there is considerable resistance from the staff to incorporate dung into the kitchen setting as part of the fuel.</div>
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<div>The volume of source material available (6-8sacks/day) does not justify a pelletizing machine and we feel this opportunity could make for a good student lead project to create a sustainable fuel management process for the kitchen/support staff.</div>
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<div>The available sawdust fuel is from treated bamboo from local factory which has some moisture content (18-20%) at time it is created.</div>
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<div>I have seen reference to other "binding materials" or even partial pyrolysis to bind the fuel and am looking for some suggestions of things to try for a local pelletizing/briquetting process. <br>
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<div>Or some arguments to accept dung as binding material.</div>
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<div>We need to generate enough fuel to feed 6-8 stoves operating over 2-4 hours food prep time on a daily or twice daily basis with reasonable efficiency.</div>
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<div>Suggestions??</div>
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<div class="m_5140728139674894923gmail_signature">
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<div dir="ltr">Tony Vovers</div>
<div><a href="tel:0813-3888-9062" value="+6281338889062" target="_blank">+62 (813) 3888 9062</a> (HP)</div>
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