Jump to content

1800 litre charcoal kiln WIP


Troels Saabye

Recommended Posts

Cool. You recovered now?

"The way we win matters" (Ender Wiggins) Orson Scott Card

 

Nos qui libertate donati nescimus quid constat

Link to comment
Share on other sites

Never heard of it but sounds really painful. Good luck man.

"The way we win matters" (Ender Wiggins) Orson Scott Card

 

Nos qui libertate donati nescimus quid constat

Link to comment
Share on other sites

  • 2 weeks later...
  • 5 weeks later...
  • 1 month later...

Troels   ...Are you aware of the amount of smoke you will be generating......I could not do that here...due to neighbor's expectation and a local solution control board.......so I do it in an open pit , which most people have a misconception of. I live in a fairly rural area.

 

.

Link to comment
Share on other sites

yep :) fortunatly - we live way out in a rural area :D I have one limitation only - can't fire it when the wind is south, anything else misses the village and anyone in a 4 mile radius. As for regulations, I found non about making charcoal or any sort of smoke.

Edited by Troels Saabye
  • Like 1
Link to comment
Share on other sites

  • 4 months later...

IT'S A LIVE !! I finally got the kiln fired up :D 100 kg of charcoal on first run a lot of charred but not completes (took 12 hours to heat up and i was impatient), but for the next run I installed a Now for the fun part : The modding and optimization. I just ordered 2" kaowool as insulation for the entire kiln ^^ it's alredy outperforming my old design in the test phase !


Bonus : used some refractory cement to seal the doors, turns out the clay under my old retorts is far better at plugging leaks :P  cheap solution. Now I just need the company supplying the insulation gets it home for next week -.- that's a looot of waiting, but I'll just do another run with the retort in the mean time

20200428_120153.jpg

20200425_142330.jpg

20200428_120151.jpg

  • Like 3
Link to comment
Share on other sites

Now the game is on, I've ordered 50 mm kaowool to insulate the entire retort,found some flexible graphite cord to use as a gasket - now i need to find a way to increase air circulation inside the retort. aswell as an IR thermometer gun 50-1800 centigrade :P just because I like gadgets and I want to know how hot the retort gets.

 

Edit : I found some gasket material for the door rated for use in solvents and corrossive hot enviroments for 20-1800 centigrade  rating ^^

 

I wonder how much time the insulation will cut off of heat up time.

 

Any ideas on how to circulate air around the wood while being carbonized ?

Edited by Troels Saabye
Link to comment
Share on other sites

20200502_122805.jpga 270 cfm fan should be a nice boost in heat up time. I don't have electricity at the kiln so im relying on car batteries 12v..

 

For the air circulation I'm going to try using a hot air fan from an oven (or build a fan with metal blades and a long shaft and a 12v motor

Link to comment
Share on other sites

That little fan made a world of difference - took 1 hour to reach 300 C outside temperature instead of 5 ^^ and the rest of the content charred in 5 hours total - now the waiting game. Hopefully I'll have another 100 kg of charcoal. I really hope the kaowool will cut even more off of the time required for a full burn

Link to comment
Share on other sites

Just pulled another 50 kg of charcoal from the retort ^^ total result : 150 kg I'm so excited - how much might the insulation improve ? The 10 cm  dirt insulation seemed to do a bit, but I hope the kaowool can handle the heat - maybe paired up with some other rockwool on the cooler side to add insulation ?

 

maybe 50 m kaowool and then 100-200 mm rockwool?

 

Edited by Troels Saabye
Link to comment
Share on other sites

Don’t burn through it all before the kaowool arrives ;)

"The way we win matters" (Ender Wiggins) Orson Scott Card

 

Nos qui libertate donati nescimus quid constat

Link to comment
Share on other sites

Just had a close call with the kiln - a 1.8 m3 oven at 500 C is no joke - a spark and a freak gust of wind = all but a 25 kg bag went up in smoke from the latest charge, worked with the packing though, never have I seen my oven so completely charred :) so that's good... Just need to take more care cooling down and the weather.. Lost both sets of eye lashes and the brow on my left eye -.-
 

:P when it arrives I won't be forging anytime soon - making charcoal is a priority before the dry season arrives again

 

Edited by Troels Saabye
Link to comment
Share on other sites

Okay after close inspection the retort survived the burning of its charge. A few whacks with the anvil of an axe to a bent bolt and it was solved. Next time I will be using 3-4 days for it to cool back to a safe point - maybe add a temperature sensor to the top,midle and bottom of the retort - First insulation then gadgets. I'm also going to buy a ½ meter section of chimney pipe with a shut off handle instead of making it myself.

Link to comment
Share on other sites

Score :D just got a hand with loading a truck full of 10-20 cm diameter branches of beech,maple and some other hardwood nice and dry going straight to next thing : I have to build a wood drying kiln(solar) to minimize fuel costs turning it into charcoal. And I found some cheap K-type thermometer probes on Ebay, going to make three points top, midle and bottom of the retort.

hopefully I can push it down to 3-4 hours for a single run and the 3-4 days of cooling off until I figure out some way to cool it faster. I thought of making a removable insulating mantle - but it would be a monster to move + the temperature would be a thin step short of suicide to handle.

Im also looking into building a fuel hopper - right now I undersized the combustion chamber (cleaver me...) but with the fan its okay - just have to feed the flames every 20 mins..

But it'll be another week for the kaowool to arrive, so I'll use my time chopping wood for the retort, got to build up a stock, in that way I can just keep it locked and loaded and hop out to make charcoal when I want.

 

Link to comment
Share on other sites

And I just ordered 3 K-type temperature sensors and a handheld meter - going to  mount them top,middle and bottom of the retort- and the kaowool should have been shipped today - when it arrives I'll go and insulated the sides first.

 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...