[IMG]http://www.gekgasifier.com/gallery/files/1/dscn2998-600.jpg[/IMG]
here's some pictures from the power pallet set up and first day of the workshop. [URL="http://www.gekgasifier.com/gallery/browseimages.php?c=40";] http://www.gekgasifier.com/gallery/browseimages.php?c=40 [/URL] we have a very interesting collection of people from local govt, ag development agencies throughout the philipines, and business folk. two from the gasification list have joined us from india. about half of the audience is involved with other gasification projects in the philipines, most all rice husk gasification projects. the big topic of concern is the waste water from wet scrubbing based solutions, and the large size of typical gasification plants. seems we've heard this theme before. most all the rice husk gasification systems are using open top downdrafts of one sort or another, feeding it with a low void space fuel, and thus getting a very dirty gas out of the reactor. the dirty gas problem is "solved" in the filtering, but at significant cost, size and disposal complexity. the potential for a small compact system that can be made mobile and put along side threshing, drying or milling machinery, and moved from site to site, is of great local interest. new things are possible when you move a gasifier towards a washing machine size object, away from a typical industrial size plant. of course the current gek reactor will not handle small granular fuels like rice husk. we have other ones in process that will, and do so with good tar conversion in the reactor, so the same minimized clean up system will still be possible. currently we are running wood chips made locally, at about 30% moisture content. the totti heat recycling systems are giving us much more tolerance to run higher moisture content fuels. everything here is extremely wet. air drying seems to only get things into the mid 20s moisture. our moisture meter on the fuels we're chipping is reading 30% on average. that is the driest we can find without purpose drying the fuel. the fuel we're running looks like this: http://www.gekgasifier.com/gallery/showimage.php?i=720&c=40 even with this 30% moisture fuel, the restriction in the hearth is staying at 850-930c on a 3kwe load. this corresponds to 1200c or so at the nozzles most likely (but unmeasured). these are the temps we want to see for full tar conversion. we had a white filter and unmolested sawdust after our first runs yesterday. today we're going to experiment with chipped bamboo, rice straw, and rice husk. the bamboo i expect will work ok. the straw and rice husk much less so. but it should be interesting learning. the big issue with the rick husk is the over 20% silica content. at high temps this forms silicon dioxide, or crystobalite, which is a bad nasty. the particular dynamics of its formation and deformation, as well as the nature of its health issues, i have not got caught up on. i am not clear if our high temp tar conversion strategy is going to create silicon dioxide problems. as i'm internet challenged locally, if someone(s) could go figure out the dynamics of its formation, and summarize the issues here, it would be highly helpful. i'll report more as i can. jim [IMG]http://www.gekgasifier.com/gallery/files/1/dscn3031-600.jpg[/IMG] [IMG]http://www.gekgasifier.com/gallery/files/1/dscn3023-600.jpg[/IMG] [IMG]http://www.gekgasifier.com/gallery/files/1/dscn3020-600.jpg[/IMG] full gallery here: [URL=" http://www.gekgasifier.com/gallery/browseimages.php?c=40";] http://www.gekgasifier.com/gallery/browseimages.php?c=40 [/URL] -- ------------------------------------------------------------------------------ Jim Mason Website: http://www.whatiamupto.com Current Projects: - Gasifier Experimenters Kit (the GEK): http://www.gekgasifier.com - Escape from Berkeley alt fuels vehicle race: www.escapefromberkeley.com - ALL Power Labs on Twitter: http://twitter.com/allpowerlabs - Shipyard Announce list: http://lists.spaceship.com/listinfo.cgi/icp-spaceship.com _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org
