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</o:shapelayout></xml><![endif]--></head><body lang=NL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Edward,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Propane and biogas cannot be integrated in one burner. You need a different burner head. You should go for a burner that can be removed and than interchanged. We have experience with biogas burners to be used for drying of tea and that works very well. The tea dryer is fitted both with diesel fired burners and biogas fired burners. The digester we used was a large 4000 m3 pvc reinforced ecobag digester with mixers and with plenty of biogas storage. For a photo look at </span><span lang=EN-US> </span><span lang=EN-US style='color:#1F497D'>http://www.thecogas.nl/download/Indonesia%20factsheet%20eng.pdf<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Theo Bijman<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Van:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> digestion-bounces@lists.bioenergylists.org [mailto:digestion-bounces@lists.bioenergylists.org] <b>Namens </b>Edward Matos<br><b>Gepost om:</b> vrijdag 7 januari 2011 8:42<br><b>Gepost naar:</b> Archief van info<br><b>Discussie:</b> [Digestion] 250kW hot water biogas boiler<br><b>Onderwerp:</b> [Digestion] 250kW hot water biogas boiler<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span lang=EN-GB>Dear biodigestion experts,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>A milk processing company in our vicinity (Tanga, Tanzania) has had a lasting interest in converting its milk pasteurising process from running on propane to running on biogas. I am doing them a little favour by helping them to make a feasibility study and find the right people that will make this happen. Unfortunately I have very little experience in biogas combustion and would like to find out if anyone here is/knows someone who could help us on this subject.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I am looking for a someone that could make a cost-effective modification/replacement to the current burner, so that it can may run interchangeably on biogas or propane. I’ve included a few system specifications below:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Burner make/model: Buderus Logano SE635<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Gas regulator make: Dreizler<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Gas: Propane @ 1.5 bar (apparently not of particularly good quality)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Heating power: 250kW<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Usage: 230-300 litres of liquified propane gas /day<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>The burner is used to heat water from around 70 degrees C to 95 degrees C in a boiler.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Does anyone know if such a replacement/modification is typically financially viable? Of course this depends on the rest of the system but I would be interested of hearing/reading about similar switch-overs in this ballpark that have been carried out before with financial success in the context of their own systems.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Many thanks for any help that could be offered.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Edward<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>_______________________________________<br>Edward Matos<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>MEng (Hons.), AMIMechE, Hon.MSEE<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><br>Mobile: +255(0) 686 128 037<o:p></o:p></span></p></div></div></body></html>