[Stoves] Burning saw dust in TLUD stove

[Richard Stanley]

I also saw the sawdust stove made out of a 5 gallon/~20 liter paint bucket for use in the kilns at  Dedza Pottery  Malawi in the mid 90's.
Same as PAals observed construction: 
Mold made with 
• a center vertical plug:   A 3"ø   stick tapering to 2.5" (75mm tapering to 62mm) over its ~16" (40mm) length. (stick is smooth to to touch and soaked with hot wax which is then rubbed in to make sick  easy to extract fomr compacted sawdust...
• a radial plug for insertion on horizontal through corresponding pail side wall hole about 2" (50mm) up from the pail bottom. This stick was  about same diameter and taper but only about 8" (200mm) in length. (Treat same way as above)
 pail with some tape to side wall for easy removal

On another matter entirely, the search for the perfect carbonising layer for gassification, is it necessary to always to think on the horizontal...? there are fluidised beds but I'm just   wondering if this is not what we are see in  the charring of the  central -usually but not essentially- vertical core of the briquette--a core which expands  outward through combustion of it own wall. Is it too much of a stretch to say that, as the spent layer is spalded off to the ash pit beneath, exposing fresh pre charred material, it is behaving like a fluidised bed of sorts ?  

Richard Stanley


On Jan 18, 2011, at 6:10 AM, Paal wendelbo wrote:

> During 2nd ww some soldiers was trapped at a sawmill in France some where, and after awhile the only they had for fuel was sawdust. They stamped a 10 litre bucket with sawdust. with a 2" stick vertical in the middle and a 2" stick in bottom  for air intake and ignited in the cannel.I trod it in the Peko Pe in Uganda in 96 and it works. A 200 litre barrel with sawdust was burning 8 hours with a 4" air channel and glowing another 5-6 hour
> 
> Paal W
> 
> ----- Original Message ----- From: <rajan_jiby at dataone.in>
> To: <stoves at lists.bioenergylists.org>
> Cc: "vijayaganapathi" <vijayaganapathi1 at gmail.com>; "mukundan" <mukundanpa at gmail.com>; <sujatha_pm at yahoo.com>
> Sent: Friday, December 31, 2004 8:07 PM
> Subject: [Stoves] Burning saw dust in TLUD stove
> 
> 
>> 
>>> 
>>> Message: 4
>>> Date: Sun, 16 Jan 2011 23:30:30 -0500
>>> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
>>> To: "'Discussion of biomass cooking stoves'"
>>> <stoves at lists.bioenergylists.org>
>>> Subject: Re: [Stoves] old patent-paper about a saw-dust stoves
>>> Message-ID: <01fd01cbb5ff$47fe7ee0$d7fb7ca0$@gmail.com>
>>> Content-Type: text/plain; charset="us-ascii"
>>> 
>>> 
>>> Has anyone seen sawdust burning stoves that seems to work reasonably well,
>>> or are they all plagued by rising thermal power, for example? I am hoping
>>> that some form of TLUD will work with really small sawdust particles because
>>> there is so much of it around.
>>> 
>> 
>> This should not be a problem with Champion TLUD stove - since this stove has a provision for attaching a blower for the primary air.
>> 
>> A blower will be definitely needed to push the primary air through the saw dust.
>> 
>> A fine mesh can be added above the regular SS mesh ( below the fuel bed ) - so that fine particles do not fall through.
>> 
>> Regards,
>> 
>> 
>> Rajan
>> 
>> 
>> 
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