[Stoves] torrefied biomass and plastic

[Paul S. Anderson]

Quoting AJH <list at sylva.icuklive.co.uk>:
> At the industrial scale the temperature and retention time will be
> enough to guarantee these species are broken down to simple oxidation
> product but I cannot see this going to completion in a simple cooking
> stove. Tom Miles once mentioned a retention period of a small number
> of seconds, a brief calculation of mass flow and flame length will
> show this does not happen in a simple flame.

Andrew,
Your comment raises the question of having something more than a simple flame.

Would that be a "compound flame" or a "multi-flame" or what?

And how are such "non-simple flames" accomplished?  For example, could 
a second
high-temperature flame such as a propane jet (plus oxygen and mixing) be
directed into the not-yet-clean gas stream from the burning plastic, and
thereby accomplish the necessary time and temperature to get clean combustion?

First we need to know what can and cannot be accomplished.  Then we can 
look at
costs and heat generated and size of "stove".

Paul   (who has only joined this discussion thread now)


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