Gasifier Experimenters Kit - Pole Shift Survival Information

QuadrafierWe ran it on sawdust, cubed wood, coffee grounds and coal dust. all workedfine, but the coffee grounds were very difficult to get to light. though once lit,they burned fine. it should really run on any biomass that is reasonably dry anddense.The tank we used is 6" in diameter and about two feet long. I put an angle fillpipe about 2/3 of the way up. the gas outlet is an existing 1/2" pipe fitting in thetank. The distance difference between fill point and gas outlet was toencourage dust settling, and used a gravity loop for the air in at the bottom.As i have been long confused about the grates, and didn't have anything to usethat was fine enough or heat resistant enough, i decided that a pipe protrudingto the center of the tank in the base, and then curved upward outside the tank,would allow air in and not allow fuel out. my other main reason for this was thati wanted to be able to run dusts, like coal dust and coffee grounds, whichseemed like a difficult proposition for grates. so gravity was engaged, andgravity proved to work rather well.V2.0: Open Hopper Stratified Downdraftall stratified downdraft pictures are temporarily hereThe stratified downdraft was built from the same 2x air compressor tank asused for the first updraft. as for fuel, we ran: pellet wood, sawdust, coffeegrounds, coal dust, coal chunks, pizza crusts, pistachio nut shells andcardboard. the pellets ran well, as did chunk coal, but the granular and loosepaper fuels packed up more than in the updraft. makes sense, as in an updraft,http://whatiamupto.com/gasification/quadrafier/index.html (3 of 6) [10/9/2008 08:00:07]