[Stoves] Rice Hull Cooking Stove

[alexis belonio]

Dear Dr. Reed and All,

Thanks for the info re rice husk gasification.  I
agree with you that at higher temperature, there will
be problem on slag formation in rice husk ash.  In our
TLUD rice husk gasifier, we usually operates at low
temperature (approx. less than 1000 C) so that we
could minimize this slag formation problem.  Our new
continuous flow grateless rice husk gasifier work well
also at this temperature.  

Carbonized rice husk produced (35%) from this
gasifiers are commonly used here in the Philippines as
soil conditioner. CRH has higher water holding
capacity and it is a good material to preserve water
in the soil.

Again, thanks and God bless!!!

Alexis   

--- Thomas Reed <tombreed at comcast.net> wrote:

> Dear Paul and All:
> 
> I think that you should be aware of a major area of
> biomass gasification 
> that applies particularly to rice husks. 
> 
> Agricultural biomass is not good for complete
> (including charcoal) 
> gasification because it requires temperatures in
> excess of 900 C and ag 
> residues will often slag at that temperature. In
> addition, both the 
> charcoal AND the ash should be returned to the
> fields from which they 
> came. 
> 
> There is major interest in Terra Preta, the use of
> charcoal as a soil 
> amendment.  Fortunately, the TLUD gasifiers only
> pyrolyse the fuel, and 
> leave up to 25% as char-ash for return to the
> fields. 
> 
> Good luck in promoting this...
> 
> Yours truly,
> 
> TOM REED               THE BIOMASS ENERGY FOUNDATION
> 
> Paul S. Anderson wrote:
> > Dear Walter,
> >
> > Welcome to the club!! (Stoves Listserve is a
> "club" of stove 
> > enthusiastists who
> > enjoy interaction with people just like you.)
> >
> > Your chosen topic is rice husks (or hulls) and the
> stoves that can use 
> > them.  As
> > Andrew correctly pointed out, the Mayon rice husk
> stove has been 
> > brought to our
> > attention by Roger Samson.  I would like to add
> that Roger was working with
> > Alexis Belonio of the Philippines.  Roger has many
> talents and 
> > interests. Alexis does also, but Alexis should be
> called "Mr. Rice 
> > Husk".  Rice husk
> > characteristics and uses are his focus, focus,
> focus.
> >
> > Alexis is a subscriber to the Stoves Listserv, but
> I have added his address to
> > the recipients list so that you will have it, and
> we will be sure that Alexis
> > sees this message.  Same for Roger Samson.
> >
> > I recommend that you go to
> >
>
http://info.bioenergylists.org/en/contributors#Belonio
>    and see 
> > several items,
> > especially the "Handbook".  In the Preface (which
> I wrote) you will read why
> > that work is so important.  Later I met Alexis at
> a workshop in China about
> > gasifiers, and am now even further impressed with
> his work.  Because of 
> > Alexis,
> > I have become involved in the study of rice husks
> as fuels for small 
> > gasifiers. (Much work on rice husks for large
> gasifiers was conducted a 
> > few decades ago.)
> >
> > Several things about rice husks and on-going work:
> >
> > 1.  Making briquettes from rice husks does NOT
> seem to be necessary nor
> > advisable.
> >
> > 2.  Both Alexis and I are developing stoves that
> will take dry raw rice 
> > husks as
> > the fuel.  In the works are: an improved Mayon
> stove by Alexis; a smaller and
> > less expensive version (by me) of the batch-fed
> T-LUD gasifier 
> > described in the
> > Handbook; two separate versions (by Alexis and by
> me) of continuous-feed small
> > gasifiers; and a possible "small-industry
> gasifier" for process heat.
> >
> > 3.  Except for the Mayon stove, all of the other
> rice husk burners mentioned
> > above utilize forced air, meaning at least the air
> power of a good computer
> > fan.  We need the air power to overcome the lack
> of air passages through the
> > column of rice husks.
> >
> > 4.  Although both Alexis and I would love to
> generate some income from the
> > stoves, we agree that the ideas that are published
> and others that could be
> > shared individually should first be pushed forward
> to become useful 
> > products in
> > successful projects that benefit needy people. 
> For this, we can use your
> > assistance, and we would like to get to know you
> and your capabilities (and
> > limitations).
> >
> > So, subscribing to the Stoves Listserv is
> important if you want access to the
> > full "club".  Otherwise, you now have the
> addresses of Roger, Alexis, and me.
> >
> > Many others could have interest in rice husks as
> stove fuels, but 
> > interests and
> > actions are not the same.  If anyone knows of
> anyone else who is actively
> > working on this topic, please help us make the
> connections.
> >
> > Paul
> >
> >   
> 
> 


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