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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Hi, Kevin.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks for the input. I had better go out and check the sizes of my screens. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'> I realize that the APA gauge is focused on thin chips for pulping. But you folks have been telling me that I need thicker chips (in relation to the length and height). I have actually been using a 3 screen system, with a smaller screen (1/4” X ¼”) to get the dust out before I even think of saving anything. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'> But even with the 1X1 screen, I could get chips that are only 1/32” thick, and therefore, very light in weight.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I am learning that those chips may be okay in some circumstances, but I want to be able to see the difference for myself.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I still have a long way to go.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Pete Stanaitis<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>----------------<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><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>Kevin<br><b>Sent:</b> Wednesday, April 11, 2012 2:47 PM<br><b>To:</b> Discussion of biomass pyrolysis and gasification<br><b>Subject:</b> Re: [Gasification] Wood Chip classificaton<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Dear Pete</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>I would suggest that a simpler, and better way to evaluate wood chips is to use a "Two Screen System." For example, if you used square mesh screen with 1/2"x1/2", and 1"x1" openings, you would end up with 3 products:</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>1: +1"</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>2: -1", + 1/2"</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>3: -1/2"</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>The APA Gage is intended for a different purpose... to give a reflection of wood fibre length, because that is what is important to Pulp Mills. For gasifier applications, uniformity of size, and the percentage of void space is what is important. The "two screen system" should give screened chips from "between the screen decks" that are much more uniform, and having much better gas flow characteristics.</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Best wishes,</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Kevin</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>----- Original Message ----- <o:p></o:p></span></p></div><div><p class=MsoNormal style='background:#E4E4E4'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a href="mailto:spaco@baldwin-telecom.net" title="spaco@baldwin-telecom.net">Pete & Sheri</a> <o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a href="mailto:Gasification@bioenergylists.org" title="Gasification@bioenergylists.org">Gasification@bioenergylists.org</a> <o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sent:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Wednesday, April 11, 2012 3:37 PM<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Subject:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> [Gasification] Wood Chip classificaton<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div><p class=MsoNormal>My only interest for gasifier fuel is wood chips. If I can’t understand them and make them work well, I won’t be using a gasifier at all.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I know this may be old news to many of you, but I recently found a couple of ways to characterize wood chips. Although there are plenty of good systems out there the best ones are way to complex and expensive for me. <o:p></o:p></p><p class=MsoNormal>So, I am using a simple gauge from the APA (American Pulpwood Association.<o:p></o:p></p><p class=MsoNormal> My simple page to explain the process is at:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="http://www.spaco.org/Woodgas/WoodChipMeasurement.htm">http://www.spaco.org/Woodgas/WoodChipMeasurement.htm</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It has links to a couple of in-depth sources for understanding wood chips, too.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Pete Stanaitis<o:p></o:p></p><p class=MsoNormal>----------------<o:p></o:p></p></blockquote></div></body></html>