[Stoves] [biochar] Design - Rocket & Anila combination

Sat Oct 26 16:46:35 CDT 2013

Dear Ed,

I also would like the drawings and photos.   And even better for 
everyone, please send those items to Erin Rasmussen who can put the 
items on the Internet at the stoves website and at the biochar website.

I think your listed reasons for having a Rocket inside instead of the 
standard Anila simple burning area are excellent.

I have a few questions:
1.  to empty out the biochar, do you have a clean way that can be done 
inside the home?   Or is it still best to take something (describe what 
it is) to an appropriate area?

2.  And can you do (or envision doing) an arrangement for "reloading" 
the Anila part of the stove?  That is, exchanging some container of 
biochar for a container with biomass to be pyrolyzed?   And has anyone 
done this?   The closest I know of something like this is the people who 
put containers of biomass (including outlets for the gases) directly 
into fireplaces or campfires.   Those containers can be continually 
reused as long as the exterior fire is burning.

3.  Do you have a way to cut off the air to the Rocket sector when the 
pyrolysis of the retort (Anila) is supplying plenty of gases to be 
burned?   This would seem to be a logical capability to have.

4.  Your system is for home heat and hot water also.   Please describe 
that for us.   (and in what climate zone do you live?)

5.  I hope that the "mainly discouraging responses" did not come from 
TLUD advocates.   What you are proposing could be done ABOVE a TLUD as 
the initial source of heat (but not with the retort around the TLUD 
reactor because it is only hot at the top at the beginning, and the 
retort needs heat on its full length right away.)

6.  IMAGINE 3 or more enclosed Anila-style crescent-shaped (removable) 
retort chambers that form a central "chimney" (actually it is a 
riser).   Get it started with heat from a Rocket or TLUD or simple fire 
and use the off-gases to continue the pyrolysis.   BUT have the 3 or 
more chamber at different stages of the retort process:  drying out the 
fuel (up to about 120 C), torification up to about 300 C, pyrolysis up 
as high as the retort can be operated.  I am suggesting that the 
combustion of the off-gases from ONE of the chambers might be sufficient 
to take the other two to higher temperatures.   And then when the first 
one has completed its pyrolysis, empty it and put it (or another one) in 
its place, keeping the sequence going on and on and on.   One advantage 
is that the overlapping time periods of the retorts result in continual 
fire with "batch-length" time periods for attention instead of the 
frequency of attending to the fuel in Rocket stoves.      If anyone 
tries this, please inform us, even if the results are not very good.

Keep up the good work.   It is experimenters like you who are reporting 
new capabilities.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype: paultlud      Phone: +1-309-452-7072
Website:  www.drtlud.com

On Oct 25, 2013, at 12:15 PM, Edward Revill wrote:

>
> Hi Trent,
>
> Yes I have built stoves with the retort around the combustion area of 
> a rocket type stove. These stoves can be seen as just another 
> variation of anila stoves but in practice they are a vast improvement;
> 1, they burn more cleanly than standard anila stoves because you can 
> control the amount of air entering the combustion zone,
> 2, being front lit (rather than top lit) it is easy to add hoppers so 
> these stoves can be brought indoors under a flue pipe as they do not 
> need to be moved to fill, light or empty the biochar.
> 3, you can continue to burn them as rocket stoves once a batch of char 
> has been made
> 4, in my experience it is much more efficient to produce biochar with 
> combustion inside rather than surrounding the retort.
> 5, combustion inside rather than surrounding the r capture.
>
> I run a small market garden and for over 3 years I have produced a 
> steady stream of biochar (around 5kg a day in the winter months) from 
> these stoves.
>
> I have no domestic energy bills for heat, hot water or cooking. Other 
> people waste the heat they generate by producing biochar.
>
> For some reason I have received mainly discouraging responses from the 
> 'experts' in biochar stove fields. (See the discussion of 'biochar 
> rocket stoves' in the yahoo groups stoves list.) I often find that 
> 'experts' have a reputation to maintain but to dismiss a good stove 
> design is their loss.
>
> I strongly urge you to go ahead and make one regardless of other 
> peoples views, if you want to bring a biochar stove indoors under 
> heaters and a flue outlet without issues around emptying and quenching 
> the biochar and with no indoor CO or PAH I have never seen anything 
> else that is as well suited.
>
> If you want drawings and pictures then please email me,
>
> Best wishes, Ed.
>
> ------------------------------------------------------------------------
> *
> Has anyone worked with concept of building a char chamber around the 
> flue of a rocket stove, heating inside out vs outside in? Building a 
> rocket stove for the shop, trying to double dip.
>
> Sent from my iPhone
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