[Stoves] Blue Flame -- Natural Draft -- Rice Husk

[Richard Stanley]

Kobus youare right. It was indeed 2003. I forgot about the date when I simly inserted that photo which I had edited two years on… 
And John Davies, my apologies for having forgotten to reference you in that photo as well. 

Kobus you suggest that the top grate ( the so called "diffuser" by me), as a catalyst : I never thought of this as such: How did you see it functioning as a catalyst ? Its was just an enamled perforated and slotted cast iron disk typical to most ordinary gas range cookstoves as I recall it.
I also recall our discussion with John in which it was suggested that the slots allowed a secondary if not tertiary source of air right at the point of combusiton (hey ran vertically down from the outlet holes.  
What did we miss eh ?  

Richard 

On Aug 23, 2013, at 3:45 PM, Richard Stanley wrote:

Marc, great work to pull this off with rice husks consistently is some feat: 

Kobus Venter and I managed same in south Africa with charcoal-agro residue blended hollow core briquettes in his stove but it was hard to replicate and very sensitive to any wind. Nevertheless it really kindles the spirit to see those blue flames  eh ? We also managed this with no forced air; It was almost by accident that it happened: Just on a lark after hours of trying different tin can ends with various holes in them for Kobus' stove top, I got ahold of a regular gas stove top diffuser (thats what I termed as the last thing between the gas outlet and the cooking pot) ..and stuck it down over  kobus' gassifier stove and voila…
...but again, was very sensitive to air flow. And, as that stove required top loading of the  fuel, it killed the burn for several minutes afterwards, but for that short ~ 20 minute long glimpse of blue flames !!! (You just have to experience it eh ?) 

Now, if one can come up with a way to ignite what you've got, with push button spark or heat element convenience, for near immediate ignition, you'll enter the market for mass consumption of biomass fuel/ stoves, supplying what the consumer really wants:  
The real smell of natural,well combusted  biomass with the convenience of gas…

Richard Stanley
Pietermaritzburg, south Africa and Kobus Venters house, Nov. 2000 
   Those were the best tasting steaks steaks this side of wherever,  eh Kobus ? 



On Aug 23, 2013, at 2:14 PM, Erin Rasmussen wrote:

Hey that's exciting.  I've seen blue flame with wood pellets on occasion, but only on the edges of my stick built fires.
 
Nice work Marc!
Erin
 
From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Marc-Antoine Pare
Sent: Thursday, August 22, 2013 8:34 PM
To: Discussion of biomass cooking stoves
Subject: [Stoves] Blue Flame -- Natural Draft -- Rice Husk
 
Hi everyone,
 
I've managed to repeat blue flames consistently in a rice husk stove using only natural draft.
 
Anyone seen this before? I am only aware of forced air stoves that achieve blue flames.
 
The photo below is just a teaser. The lighting is terrible and you can't make out the column of blue flame because I'm shooting straight down.
 
The smell is also quite motivating. Usually you get acquainted with the "smell of defeat" with rice husk, since poor combustion smells quite strong. So far, achieving odor on par with forced air units.
 
More soon...
This will be part of a completely Open Source project
 

 
marc
notwandering.com
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