Coffee can wood-gasifier stove

[tonkacaptain]

Thanks for the vid. Why not at least give some written instructions / diagrams?

[mysund]

With intakeholes on the top, much of the CO and CO2 from the burning fire will be sucked back in thru the intake, and too little oxygen will get to the fire, hence the smoke when you put the pot on its top.

[wmdrtr]

Or a similar size can on top with a gas wick?

[wmdrtr]

Cool. I see you are using the downdraft, but when you put the water on to boil, it limits the air. Maybe if you had bigger/more holes? Thanks for your efforts. I learn a lot by watching what you all do here with your experiments. Very cool.

[treborly]

its just a fire, how is this a gasafier?

[crazyboyaustin]

do you have a fan

[sporabolic]

let me guess, when you put the pot on top it starts smoking again?

[legox50]

Down draft gasifier?

[Cathlapootl]

YES! exactly. :bow: what couldn't i have said that? lol thnx for commenting. :)

[ntrpe]

How have you attached the lid to the burner box, I'm interested to make one to take on the road.

[Cathlapootl]

it's held in place by gravity. :)

[JAROSLAVAGINA]

what did you use to cut the hole in the large can lid?

[Cathlapootl]

cut the big hole & tabs with tin snips after drilling a couple starter holes and then bent back the tabs with pliers.

[jay96jay96]

If there were holes in the bigger bottom can it would work way better. I have made one and it needs to have the holes in bigger can for better air flow. Fire will burn much hotter and with less smoke.

[eastrockaway11518]

cook the remote

[Cathlapootl]

LOL :)

[jay96jay96]

I've made one about two years ago. You definitely need holes at the bottom of the big Coffee can. About 10 at 2" apart. Works very well.

[hoz49]

You need a stoker. Computer fan from Radio Shack, small duct made of aluminum foil, 9V battery. No smoke.

[Cathlapootl]

:) LOL Acknowledged & thanks. The reason I'm making charcoal is to put it in my garden as a soil ammendment ala Tera Preta soils.

What I'm thinking now is to make the holes as you all suggest in the bottom, and make accomodation to open & close them. Best of both worlds. :)

[mmnootzenpoof]

I've been very interested in charcoal soil amendments lately as well. I look forward to seeing what improvements to your design you end up making!

[crackahcrackah]

thanks so much for posting this. I've been hunting all over for simple methods of producing charcoal. I'm interested in soil amendments AND making active charcoal for homemade filters. It's gonna be important with the direction the bankers/masons are directing civilization. If you're interested active charcoal can be made 2 ways. The more accessible method is to pass steam through the charcoal as it's heated. I'll post something if I get around to this b4 school starts...

[mmnootzenpoof]

I know you disagree, but the reason for having intake holes on the lower part of the outer can is for increased airflow from convective currents.

The reason you're only making charcoal and not burning all the way to ash is because the pyrolysis reaction isn't getting enough oxygen to convert the charcoal to woodgas.

Technically what you've got is a wood distiller, not a woodgas stove. :)

[nitack]

Pyrolysis requires the ABSENCE of oxygen. If there is oxygen then you will not be making charcoal, but instead just burning wood. Woodgas is a byproduct of the pyrolysis process.

[MrBillTroop73]

Very well done.

Bill

[scottnebo]

sorry I goofed not holes in top for my pan but air intake and I would make a seat on top for my pan.

[Cathlapootl]

I did another test run and it works just dandy for making charcoal. From 120 gms of wood,(a mix of Luan Mahogany & Oregon Ash) I harvested 17 grams of premium charcoal and added it into my garden.

[scottnebo]

hey I have been studying the designs on these things and I believe part of your problem is two part. As you know you should put the intake in the bottom of the main can, and the other is to raise the pot off the flame because it is interfering with the gas's combustion. You can do this by trimming another coffee can in half and splitting it down the side then rejoining it together with rivets or bolt shrinking it by a few inches and I would also punch holes in the top to make a seat for my pan

[minibulldesign]

I agree with everybody else This stove need holes in the bottom outer wall and then it will work great--nice building job !!

[Josiah922]

I agree with the other posters here. It appears that having intake holes in the top is not sufficient. Keep in mind that the rails that your pot is sitting on is also covering up some of the intake holes in the top. If you will move your intake holes to the bottom of the side of the outer can, then it will work like a charm. I am doing research on making another prototype for myself and should have my demo online soon. Thanks for the vid.

[Cathlapootl]

I plan to drill holes in the rails; I agree they restricted air flow. I do not think I have insufficient intake holes however. The stove only smoked when I first lit it, when I put the pot on and restricted the intakes, and at the very end when the fuel was spent. The main burn was virtually smokeless. I also plan to use this as a camp stove, and so I want all parts to fit inside a covered can with no holes to leak. Thanks for all the comments everyone!

[farotub]

rocket stove feeds from the side

this one is a WOOD GASFIER BUT needs a hole (big) in the bottom part and will work like a charm. good workmanship thoug congrats

[Cathlapootl]

Acknowledged. I have changed the title, description , and tags. Note that it makes charcoal, and leaves almost no ash. It works like a charm as is. :wink:

[rogeliomarigomen]

i think it is a wood gasifier but there are no holes in the outer can for primary air. this is why it produces smoke.

[Cathlapootl]

The primary air holes into the outer can are in the flat lid. I am making modifications for portability and air flow; will post vid when done. Thanks for commenting. :)

[rich991980]

It seems like your stove is more of a wood gassifier, rather than a rocket. The rocket usually has a 90 degree elbow for inserting wood, and an insulated combustion chamber. Check out his one I made.