[Gasification] up draft systems

[Brennan R Henderson]

Douglas Diaz,

I'm working on an updraft gasifier as well, and I have had a  
difficult time finding
out much design information. On page 32 of the "Handbook of Biomass  
Downdraft
Gasifier Engine Systems" there is some info about maximum recommended  
hearth
loads.

The Technical University of Denmark has a study on thermal tar  
cracking of updraft
gasifier gas that will give you a good example of the gas composition  
you can expect.

At this link:    http://bgg.mek.dtu.dk/publications/pdf/ 
sevilla2000_v8-67.pdf

The University also has a study that combines an updraft gasifier  
with a stirling
engine that shows mass and energy flows.

Here:      http://bgg.mek.dtu.dk/publications/pdf/amst02_v2_99.pdf

  Quote:  "However, as far as I know, there is no need in focusing  
only on updraft
gasifier, downdraft systems can do the job quite all right."

I think an updraft gasifier would be better for your application  
because you
will get a higher energy gas and you will not need to dry your  
biomass if it is
drier than 40% moisture content (weight basis), i.e. you can use  
green wood.

Hopefully this has been helpful to you.

Brennan Henderson
Vernon, BC Canada

P.S.  If you have any other updraft gasifier design info I would be  
glad to hear about it.



On 28-Nov-06, at 7:10 AM, Douglas Diaz wrote:

>
> Dear list members,
>
> I'm working on a gasification project for my brother's ceramic  
> factory.
> He's spending loads of money burning L.P.G.
> The roller kiln (a relatively small one 20 meters long) burns
> 1.5 M BTU´s /hr.  or 14.5 cubic meters of gas per hour, aprox. ) 
> I've been a
> list member for quite a long time now, and I suppose I've done my  
> homework.
>
> The point is haven’t found a updraft design to work on. It's full  
> of info.
> on downdrafts, .
> Please let me know if there's something out there.
>
> Thank you very much.
> Douglas Díaz Mc leod
> Santiago, Chile.
>
>
>
>
>
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