I got started on this after watching the Gilmore Gasifier David Parrott videos on youtube. Ray mentioned the Nozzles for Charcoal Gasifiers thread which brought up some interesting comments by Max Gassman
“It seems like a “dogma”, that charcoal nozzles have to be put into the white-glowing char.”
“The inside of the air-nozzle-tip is best, if it is made with trumpet-profile”
“The nozzle tip needs not to be more than 1/2 – 1” above the actual char
level under the “upside-down” funnel."
“the diameter of the upside-down funnel needs not to be more
than ~8 – 10 charbits”
I’ve been reading here and on the yahoo group for a couple of years. I have spent most of that time designing and re-designing a charcoal retort,with which I am more than satisfied. I have avoided the gassifier aspect because it seemed that a good nozzel had not yet been designed. It seems to me that, as Max implied, if you don’t want your nozzle to burn up, get it out of the white-glowing char.
IF your nozzle is of trumpet profile(doghouse/birdhouse), 8-10 charbits diameter with a slope that gives a nozzle tip 1/2-1" above the char, made of cast refractory, wouldn’t the nozzle tip be above the white glowing char and not be as likely to burn up?
I’d like to build a Gilmore Gasifier(David Parrott video) with a cast refractory trumpet nozzle to start my journey to the dark side.