[Stoves] Briquete from paper (and alternatives)

[Richard Stanley]

Crispin et al,
Would also add that some of the cartonboard and heavier–usually  
wrapping/packing– papers, use nasty glues which when pulped make the  
mass  gelatinous and serve  as great binding agent but they stink and  
cause the brriquette to just smolder when burned. Tricky stuff papar.  
Durina a typical  training the trainees will happily jump into paper  
because of the   ease with which it breaks doen and binds up the  
mass.. They thye run out of paper a few months on and grind to a  
halt. Some donors actually run wastepaper back and forth to sustain  
them, otherwise they have to get to briquetting 202, which is hte  
real stuff of  using agro residues. Its like graduating fomr  
Mcdonalds fast food to a fancy restaurent ! Where aromas are involved  
different heats are generated.

Interesting too, to note the twist/spin of/ the flame through your  
newspaper.  This natural spin tendency is seen in briquettes too.
I wanted to find out if it was caused by the inertia of the air mass  
eddy currents of whatever medium in the rotation of the earth with   
different directions of rotation observed in the northern hemisphere  
versus southern , as is the case for water draining in the sink  or ??

  Rok Obalk and I  were recently testing the introduction of  
secondary air fed in "off-radial" to induce a spin in the combustion  
chamber for better air mixing but we failed to induce a flow other  
than the direction it wanted to spin naturally.
Comments, insights  anybody ?

Richard Stanley
www.legacyfound.org

On Jan 30, 2009, at 08:49, Crispin Pemberton-Pigott wrote:

> Dear Ron
>
> Taking advantage of the small picture capability of this list, here  
> is a few
> pics from the vault:
>
> Shortened plain newspaper has been rolled and cut to a toilet-roll  
> size
> complete with a centre hole, and burned a Vesto, which is the second
> picture. The burn is quite good. The hole in the centre tended to  
> block so
> it was perhaps too small. The newspaper was not wetted - just rolled.
>
> As I recall there was a lot of light charred paper (charcoal)  
> flying around.
>
>
>      My motivation in answering Tufa was to get maximum value out  
> of paper -
>
> which seems to burn very badly in every stove (except as a  
> starter).  I
> remember way back on the stoves list a little discussion of burning  
> paper
> when rolled up.  I don't think we were thinking at all then of either
> biochar - or of a retort inside (or outside) of a small cookstove.
>     There is little waste of paper in Ethiopia, and I found paper  
> to be
> almost non-existent in rural Ethiopia.  But Tufa's question makes  
> sense in
> Addis and we certainly don't want paper to go un-used.  But I might  
> prefer
> to have my own waste paper (too much of it) be turned to char for  
> garden use
>
> over the next best - which is recycling.  We for sure don't want  
> paper to go
>
> to a landfill.
>     When I use paper to light a fire in my home-heating stove, it  
> can be a
> terrible bother if I use too much or don't ball it up just right.   
> It seems
> to take forever for the paper-char to be consumed - and is a great  
> means of
> preventing adequate air flow.  It was in this sense that I was  
> thinking of a
>
> retort approach in a small cook stove.  Making briquettes and  
> bricks makes
> good sense - but not one for all markets.
>
>> I read that much of the water retention benefits
>> attributed to biochar are due to the tilth produced by fungi.
>
> Now that is interesting.
>
>> A retort approach should work - and we weren't
>> considering retorts then.
>
> Paper is often taken to be 'wood' but that is only true for one  
> class of
> paper. There are 'chemical' and 'mechanical' papers.
>
> The mechanical papers are those made from bashed up and cooked wood  
> and
> include kraft paper and newspaper. They have the same heat value as  
> wood,
> per kg.
>
> Typing paper has a lot of clay in it. When you are looking at  
> burning paper,
> you must realise that you might be burning thin sheets of clay  
> which make is
> smooth and nice to print on.
>
> Glossy magazine paper has all sorts of things in it to give good photo
> reproduction.
>
> Thus saying 'paper' is like saying 'biomass' rather than 'wood'.
>
> The char produced by paper will therefore contain lots of  
> unexpected things.
> Perhaps the best thing for it is to make it into more paper and char
> something else.
>
>> If the "biocharpaper" proves to be lousy in soils, then I am all for
>> more use of bricks/briquettes...
>
> I am going to make an expanded version of the Paper Brick Maker to  
> assist
> George of the jungle get the number he needs and a very large  
> (possible)
> customer in Africa who wants to feed institutional stoves with paper
> briquettes.
>
> Once we get the volumes up, we can attack the municipal dumps.
>
> Regards
> Crispin
>
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