[Stoves] Burning wet wood

[Paul Anderson]

Crispin,

> Some TLUD's heat pretty much all the wood at once (they vary). 
Please describe in detail.   I want to know what you call a TLUD in this 
case.

Paul



Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
Website:  www.drtlud.com

On 6/12/2013 11:04 AM, Crispin Pemberton-Pigott wrote:
>
> Dear Dale
>
> I believe it is easiest to burn wet wood in a continuous feed fashion. 
> I have had some recent experience in Indonesia trying burn wet (pretty 
> damp) wood in a TLUD. Some TLUD's heat pretty much all the wood at 
> once (they vary). When that happens there is a huge burst of moisture 
> in the emissions. This is visible on the HPT data quality check chart 
> as depressed?O_2 and ?CO_2 lines (they should depress in synch). The 
> evaporation of all the moisture early makes for problems later because 
> then the wood it so dry it won't stop self-pyrolysing. In other words 
> if combustion conditions favour wet wood, later they do not favour dry 
> wood remaining.
>
> Tom has some experience, as does UK-Andrew in burning pretty wet 
> biomass. The essential point is to keep the primary combustion zone 
> hot enough to run the fire and still evaporate all that moisture. Heat 
> recycling is by far the easiest way to do that.
>
> Good to hear from you. Any recent experiments to repot? I have missed 
> your great lab work.
>
> Regards
> Crispin
>
> +++++++
>
> Have we ever looked at the question of how to design a stove to burn 
> wood that is higher in moisture?  It would seem that this is very 
> important practical issue, and that a stove that could burn wet wood 
> would be very popular.  What makes a stove burn wet wood well or poorly?
>
> The only time I remember someone saying something about this was 
> Crispin, who I believe said recently that preheating the primary air 
> makes it possible to burn wetter wood.  This would be easy with a 
> batch stove, harder with continuous feed.  Other than that, I can 
> think of a couple things that might help burn wetter wood.
>
> Dale Andreatta
>
>
>
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