lawry
Junior Member
Posts: 113 
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Post by lawry on Dec 4, 2016 9:49:06 GMT -8
For some time now I have been fascinated by the blue flame of TLUDS. I came across this article lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/2011-September/001929.htmlWhich is a great explanation of wood combustion. But then I saw this video.... youtu.be/3_Hhvo825P8Which made me realize that the sooty particles mentioned in the article are now being filtered out hence such blue flame! Then I saw this video... youtu.be/E1ujbhBDpKsThis one confirms that carbon monoxide burns blue. A beautiful blue.... So in a TLUD the wood gas is filtered through the hot coal bed and is mostly Carbon Monoxide hence it burns blue.... When you cool this gas down it also smells tarry.... So we know the other compounds are still there. Maybe they are finer. It would be interesting to know the CO emissions of TLUDs that burn mostly blue. From my measurements the blue flames are not any hotter than the sooty yellow flame. I am chasing the blue flame. What's your take? |
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Post by lightworker on Dec 7, 2016 6:37:18 GMT -8
I agree, the blue flame indicates a more complete combustion. When I run my gasifier, I get it up to temperature with a burning blue flame on the flair off tube before diverting it to my generator. I use a cyclone filter followed by a media filter to remove particulate carbon and any unburnrd tars in the syn gas and therefore can get a blue flame. The blue flame is the sweet spot for the gasifier. In my tlud I can get a blue flame once the fire is well established and the coal bed is completely covering the top. I still get some soot on the pot, likely as you mentioned that some tars have not been cracked and then condense on the bottom of the pot.
John
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lawry
Junior Member
Posts: 113
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Post by lawry on Dec 7, 2016 9:18:13 GMT -8
lightworker is the primary use of your gasifier to run a generator? Or do you use it for other things?
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Post by lightworker on Dec 7, 2016 12:01:53 GMT -8
I have only used it to run a generator, but with a modification it could be used as a burner. A tlud is much easier to set up and use as a burner, just wouldn't have the prolonged burn I could get from the gasifier. In that use I would need 12v electricity to run the blower. With the generator no blower is needed after warm up as the generator pulls the gas as needed.
John
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lawry
Junior Member
Posts: 113
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Post by lawry on Jan 29, 2017 7:58:57 GMT -8
Here is what I am busy testing now youtu.be/CCPvh_FR7XAI have installed this box on the cookstove to see how it works out. I am gonna light it up now...  |
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fiskfarm
New Member
Hey fellow woodnuts. Been building what we now call "gasification" wood stoves since the 70's.
Posts: 3
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Post by fiskfarm on Feb 27, 2017 9:27:36 GMT -8
Speaking of blue flames I have often complained about the standard RMH yellow flames. My RMH is a bit different and it heats a 330g IBC full of water to 150F which in turn heats radiators and the direct heat off the stove is ducted to our kitchen above as well as heating our 900sf garage and 1600sf basement. The beautiful blue flames that burn below the logs and firebrick grate can be viewed on YT under Fiskfarm.
Blue flame vid here link:
and the build here:
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lawry
Junior Member
Posts: 113
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Post by lawry on Feb 27, 2017 12:34:53 GMT -8
fiskfarm this is a great machine! It seems your blue flames are not dependent on the air tube.... They come down already blue. Am I correct? Please do a light up video and maybe a video without the tube... How long does it take before you get blue flames? That is if you can.
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Post by Daryl on Mar 24, 2017 3:07:46 GMT -8
I've only seen blue flames with gasifiers and wood stoves.
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xanon
New Member
Posts: 1
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Post by xanon on Feb 2, 2021 11:20:53 GMT -8
fiskfarm this is a great machine! It seems your blue flames are not dependent on the air tube.... They come down already blue. Am I correct? Please do a light up video and maybe a video without the tube... How long does it take before you get blue flames? That is if you can. Hello Could you record a blue flame along with the view of the burning wood? |
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