[Stoves] Lots of smoke after a few minutes of clean burning

[Paul Anderson]

Dear Mango,

Welcome to the wonderful world of micro-gasifiers!!!

A quick response is that you seem to have far too much entry of primary 
air.  Quick trial by you to check this is to block most of the primary 
air holes (one way is to put a couple sheet of flat paper over the holes 
on the inside of the bucket, and only open --- punch through --- a few 
holes in the paper).    Or use outside blockages to limit the entry of 
primary air.

Please describe how you are igniting.

Plesase send some photos (low resolution is best).   And tell us more 
about yourself, including location and objectives.

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 5/7/2016 7:23 AM, Mango Lazi wrote:
> Hi everyone,
>
> I'm a newbie to the biochar/gasifier stove scene and I'm trying out a 
> few designs for backyard cooking and camping. I've got a 20 L paint 
> can as the reactor, 1 cm diameter primary air holes all over the 
> bottom lid with a big 8 cm hole in the center, and 1 cm secondary air 
> holes on the sides near the top lid. Fuel is small dry twigs laid 
> horizontally up to 2/3 full. I've fired the can before to burn off any 
> coatings.
>
> I get tall flames coming out of the chimney for a few minutes, then 
> the flames go lower and copious smoke comes out. I've tried running it 
> with the lid closed with a chimney and the lid on a 3 cm riser, also 
> using different wood but nothing changes. I have to quench the can 
> after 10 minutes because there's just too much smoke.
>
> I'd love to figure out what's going on and I really appreciate any 
> insight from the list members. Thanks in advance.
>
>
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