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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Thanks! I’d love to see a sketch. 5” seems pretty minimal; the riser inside the cyclone would probably be limited to 2-or-2-1/2”, and the tangential entry about the same, but lots of light-phase, vacuum conveyance systems are built with 2-1/2” tubing and spiral PVC hose. Exhaust tube is fun to weld with either a little MIG or oxy-acetylene system. Good choice.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>For some reason or other (it seems intentional) all of the high-efficiency cyclones I have worked with have been constructed with long, narrow-angled conical bottoms. The powder must be exposed to increasing centrifugal forces as it reaches the discharge zone, to keep it out of the exit airstream, I reason. But I’m certain that there’s a point of diminishing return and KISS always applies!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Mark<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> gasification-bounces@lists.bioenergylists.org [mailto:gasification-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>awesales<br><b>Sent:</b> Thursday, September 01, 2011 5:55 PM<br><b>To:</b> gasification@lists.bioenergylists.org<br><b>Subject:</b> Re: [Gasification] Gasification Digest, Vol 13, Issue 1<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='margin-top:4.0pt'>Hi Mark<o:p></o:p></p></div><div><p class=MsoNormal style='margin-top:4.0pt'>I built a cyclone for my gasifier it is made from a 5" truck exhaust pipe. It's heavy enough to disapate heat and welds very well. I entered with a 2" pipe and axhausted with a 2" pipe. The conventional wisdom is 2:1 ratio inlet pipe to dia.of the cyl.I have tried this unit a couple of times and it works well. I understand the "cone" bottom is not a great advantage. I have a simple drawing of it if you want one.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:4.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:0in'><a href="mailto:tbone188@gmail.com">tbone188@gmail.com</a><o:p></o:p></p></div><div><p class=MsoNormal style='margin-top:4.0pt'>On Thu, Sep 1, 2011 at 12:00 PM, <<a href="mailto:gasification-request@lists.bioenergylists.org">gasification-request@lists.bioenergylists.org</a>> wrote:<o:p></o:p></p><p class=MsoNormal style='margin-top:4.0pt'>Send Gasification mailing list submissions to<br> <a href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</a><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br> <a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</a><br><br>or, via email, send a message with subject or body 'help' to<br> <a href="mailto:gasification-request@lists.bioenergylists.org">gasification-request@lists.bioenergylists.org</a><br><br>You can reach the person managing the list at<br> <a href="mailto:gasification-owner@lists.bioenergylists.org">gasification-owner@lists.bioenergylists.org</a><br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of Gasification digest..."<br><br><br>Today's Topics:<br><br> 1. Re: Charcoal Reduction Mill (Henri Naths)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Thu, 1 Sep 2011 10:37:49 -0600<br>From: Henri Naths <<a href="mailto:c_hnaths@telusplanet.net">c_hnaths@telusplanet.net</a>><br>To: "<a href="mailto:mark@ludlow.com">mark@ludlow.com</a>" <<a href="mailto:mark@ludlow.com">mark@ludlow.com</a>>, Discussion of biomass<br> pyrolysis and gasification <<a href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</a>><br>Subject: Re: [Gasification] Charcoal Reduction Mill<br>Message-ID: <<a href="mailto:03DD01BD-834D-4259-A44E-5A037F4DFA3C@telusplanet.net">03DD01BD-834D-4259-A44E-5A037F4DFA3C@telusplanet.net</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>Thanks Mark<br>H<br><br>Sent from my iPhone<br><br>On Aug 27, 2011, at 2:12 PM, "Mark E. Ludlow" <<a href="mailto:mark@ludlow.com">mark@ludlow.com</a>> wrote:<br><br>> I?ll see what I can dig up. I did a project without a final baghouse and was amazed at how much the 1% loss of efficiency really amounted to! (it?s all super-fines). But getting the first 98-or-99% collected takes a huge load off the baghouse. A critical part of the cyclone is a long-ish downcomer that allow the material to accumulate and discharge with out disrupting the vortex dynamics. Learned by experience! Also, stacked Posiflate valves in lieu of a rotary airlock.<br>><br>><br>><br>> Best, Mark<br>><br>><br>><br>> From: Henri Naths [mailto:<a href="mailto:c_hnaths@telusplanet.net">c_hnaths@telusplanet.net</a>]<br>> Sent: Saturday, August 27, 2011 7:05 AM<br>> To: <a href="mailto:mark@ludlow.com">mark@ludlow.com</a>; Discussion of biomass pyrolysis and gasification<br>> Subject: Re: [Gasification] Charcoal Reduction Mill<br>><br>><br>><br>> Then, a tall skinny, cyclone<br>><br>><br>> Hi mark<br>><br>> I was wondering if you or some one on the list has the math for the efficiency ratios for cyclones ie. Tall skinny vrs short fat cfm, volume? Particulates?<br>><br>> Thanks<br>><br>> Henri<br>> Sent from my iPhone<br>><br>><br>> On Aug 25, 2011, at 10:14 PM, "Mark E. Ludlow" <<a href="mailto:mark@ludlow.com">mark@ludlow.com</a>> wrote:<br>><br>> Then, a tall skinny, cyclone<br>><br>> _______________________________________________<br>> Gasification mailing list<br>><br>> to Send a Message to the list, use the email address<br>> <a href="mailto:Gasification@bioenergylists.org">Gasification@bioenergylists.org</a><br>><br>> to UNSUBSCRIBE or Change your List Settings use the web page<br>> <a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</a><br>><br>> for more Gasifiers, News and Information see our web site:<br>> <a href="http://gasifiers.bioenergylists.org/" target="_blank">http://gasifiers.bioenergylists.org/</a><br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://lists.bioenergylists.org/pipermail/gasification_lists.bioenergylists.org/attachments/20110901/3a8593de/attachment-0001.html" target="_blank">http://lists.bioenergylists.org/pipermail/gasification_lists.bioenergylists.org/attachments/20110901/3a8593de/attachment-0001.html</a>><br><br>------------------------------<br><br>_______________________________________________<br>Gasification mailing list<br><br>to Send a Message to the list, use the email address<br><a href="mailto:Gasification@bioenergylists.org">Gasification@bioenergylists.org</a><br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br><a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</a><br><br>for more Gasifiers, News and Information see our web site:<br><a href="http://gasifiers.bioenergylists.org/" target="_blank">http://gasifiers.bioenergylists.org/</a><br><br><br><br>End of Gasification Digest, Vol 13, Issue 1<br>*******************************************<o:p></o:p></p></div><p class=MsoNormal style='margin-top:4.0pt'><o:p> </o:p></p></div></body></html>