[Stoves] Challenging fuel

Marquitusus marquitusus at hotmail.com
Thu Dec 18 04:41:33 CST 2014


Thanks Kirk and all,
It sounds good idea for too small pieces to be pyrolized. Definitely I'll make some tests on it.
Thanks to your comments and others, I'm realizing the need for screening this fuel. Though I was trying the "minimum process" way, it seems to me now that is absolutely necessary to screen this fuel, in order to reduce the size variability and achive replicable results in TLUD's.
Lack of primary air has been a constant with this fuel, which has led me to design big primary air holes and high chimneys, just to get the correct air supplie for gasification. It sure will be improved with the fuel screening.
I'll keep testing and posting (and reading)
ThanksMarc

From: kgharris at sonic.net
To: stoves at lists.bioenergylists.org
Date: Thu, 18 Dec 2014 00:41:23 -0800
Subject: Re: [Stoves] Challenging fuel








Marc and All,
 
Was there not a post a month or two ago about 
putting rice hulls or saw dust into a can with a hole in the top.  This 
then was put in the reactor with fuel around it.  The heat of the 
stove pyrolyzed the contents of the can and produced wood gas which exited the 
hole and was burned in the secondary.  I forget who posted it and 
could not find the post, but it was a wonderful idea.  I tried this 
with saw dust and with pellets and both worked.  The can needs to be 
raised off the grate some so pyrolysis will finish before 
the migratory pyrolysis front goes out or it smokes on and on.  A 
single screening of the almond hulls will seperate the small pieces 
and dust out for use in the can, while the larger pieces will be the outer 
fuel.  This way the small pieces are used without clogging the 
primary air passage.  Perhaps pieces that are too large could be 
used in the can as well without having to chop them up.  The can 
cannot be to big or the power level is reduced.  The can which 
worked for me was .4 the diameter which is 1/6 the area of the 
reactor.
 
Kirk

  ----- Original Message ----- 
  From: 
  "Marquitusus "@k.mx.sonic.net 
  
  To: 'Discussion of biomass cooking 
  stoves' 
  Sent: Tuesday, December 16, 2014 3:21 
  PM
  Subject: [Stoves] Challenging fuel
  

  
   
  
  Dear stovers,

I send you a 
  picture of the fuel I'm trying to deal with.
This is the raw fuel as it is 
  normally sold here. They are almond husks.
As you see, it's sizes varies 
  from 1 to 40mm!

Maybe people can tell me how this can affect the TLUD 
  design
  
    
  
  
   
   
   
  
  


  
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