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

[Paal Wendelbo]

Stovers.

Attached you will find photos of WTB 3 with Peko Pe -ND with pellets made of sewage-mud and waste paper. The blue flame continued during the whole combustion process. No bad smell.   Compared to pellets from wood with yellow flame the temperature was a bit lower, but you could come closer the flame with the pot, and there was no soot or tar on the pot. >From 600 gr pellets there was left 21% biochar pellet shape of good quality and with a PH between 5 and 6.

No doubt pellets will be the future household fuel, it will be possible to design it to the desired quality and utilize all types of waste from human activities and create new income-generating activities.

With regards Paal W





From: Dean Still 
Sent: Saturday, August 24, 2013 5:25 PM
To: Discussion of biomass cooking stoves 
Subject: Re: [Stoves] Blue Flame -- Natural Draft -- Rice Husk

Hi All, 

In my limited experience, blue flame is seen in TLUDs when the char starts to burn. Yellow flame is the hottest but is also associated with the production of black carbon. Reddish flame seems to be cleaner than yellow with less CO and PM. I'm thinking that cooling the flame results in less black carbon. 

As far as color goes, a great looking combination is blue at the top of the TLUD (burning the CO) and orange at the bottom when burning the char. Looks neat.

Best,

Dean



On Fri, Aug 23, 2013 at 4:46 PM, Marc-Antoine Pare <marcpare0 at gmail.com> wrote:

  Thanks all. As I mentioned, details coming quite soon. I've been documenting daily since the start of the project, and plan to keep it up.

  Dean, do you have any documentation of the blue flames that are "often" seen?

  I haven't been able to find a photo or paper on it. Many people searching for blue flames.

  Of course, you get blue flames when you are burning charcoal in a wood stove. I saw blue flames both at the beginning and ending phases of the runs, so it's not just char burning that's responsible (which is high CO, as you mention)

  marc 
  notwandering.com



  On Fri, Aug 23, 2013 at 3:54 PM, Dean Still <deankstill at gmail.com> wrote:

    Hi Marc, 

    Blue flame in natural draft stoves is often seen when burning CO. It does not necessarily mean that the flame is very hot or very clean as in forced air stoves.

    Best,

    Dean




    On Thu, Aug 22, 2013 at 8:33 PM, Marc-Antoine Pare <marcpare0 at gmail.com> wrote:

      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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