Your result seem very impressive .You need to reach more than 1300 C to melt the ash and yet the nozzel is intact
What is your recipe?
I did not know you’ve changed the brass nozzle for a thick pipe? iron?
for what reason you have drilled several small holes instead of a large nozzel?
Thierry
Wow, yes, very impressive! Are the nozzle holes 10mm? Please remind me of your engine size in CCs. It looks like combining a massive tuyere with vertical air blast is a winning combination.
Kristijan
I could not tell from the picture was the pipe cut from a larger casting or just a longer pipe?
Thanks for posting these. You and others make the dark side very tempting. But I have not gone there… YET:smiling_imp:
This is fantastic! Such a simple solution.
Can you also let us know how long the pipe is and how far apart are the holes? If I remember correctly, you are using cast iron? Have you tried this with the holes closer together? Have you tried it with just regular steel?
I’m guessing the velocity of the air is keeping the temp away from the pipe?
Thanks for sharing this.
Kristijan , your nozzle results are very impressive indeed .
I didn’t realise when you first mentioned your nozzle that you had a row of 4 holes along the length , another question along with the other questions asked would be , how do you lite your system up or do you have a separate lighting port ?
Another unique thing about your setup is the “slag nest.”
I have not observed anything like that forming in my gasifier.
But it does give me an idea.
I wonder what would happen if I just loosely wrapped the end of my nozzle with kaowool or some other sort of porous ceramic fiber. Maybe that would help start a “slag nest” and protect the nozzle?
I think that stuff is cheap enough that I could treat a small amount of it as a “consumable” each run.
Thank you all for all the kind words.
The holes only point upworrds.
I think this pipe is a part of an old hydraulic cilinder but im not sure. Just a peace of scrap metal i found
I use multiple nozzles becouse that way my reaction area per one nozzle is only about 20cm high eaven thugh the engine is 1000cc. I gain a lot of space!
Holes are about 10mm about 10cm apart. But it realy isnt so inportant how many holes and how big they are, as long as they point up. One culd just cut out a wider cut along the lengh and do just the same job or eaven better!
Lightning isnt a problem. I start the engine on gasoline, open the gas valve on full and touch the air intake with a small propane burner for a second and its done. In case not all nozzles light l have a cut in the pipe that goes from nozzle to nozzle so that charcoal starts burning fast and eaven on all holes. Once lit i can stop the engine and the char will last about 8 hours.
I think vertical nozzles are the future of charcoa gasification. I realy hope more people start researching and making it better and most of all i hope they dont get selfish by keeping the inovations for them self.
Hi Kristijan , thanks for answering our questions so quickly .
In your reply back to us you say that vertical nozzles are the future , but isn’t your system horizontal though ?
You see if any system at all can cope with the run times or the mileage that your system does then I would count that as a success , but sure never stop experimenting and trying new things and sharing .
I suspect the size and number of holes is significant because of the air velocity. In some experiments, tripling the superficial velocity (speed of air against charcoal) increased CO yield by 25%. A narrow saw cut is an interesting option. It looks like your charcoal is screened to about 20 mm?
