[Stoves] big TLUD

[Dean Still]

Hi Rolf,

The 55 gallon TLUD kept going when using very dry heating stove pellets. If
your fuels go out I think that adding more air, both primary and secondary,
could help.

Best of luck,

Dean

On Sat, May 16, 2015 at 4:35 AM, Energies Naturals C.B. <
energiesnaturals at gmx.de> wrote:

> AJH,Alex,Crispin,Dean and all the others,
>
> thanks an awful lot for these good examples and practical advice on big
> TLUDs.
> I always thought that the granulometry matters a lot as for the max size
> of a
> gasifier, but from Bill's 350 gal  experience I see it doesn't !
> His shells are much the size of our almond shells and even with more dust
> particles among them.
>
> Now I am looking for a long gas tank and build one myself. I was always
> trying to have something "inexpensive"
> which allows me to use the energy delivered during the pyrolisis for
> heating and other purposes and not waste it.
>
> And I'll try to run it on big chunks of 120 mm length from our old Jensen
> chopper which has by far the best
> ratio diesel/chopped brushwood I know of.
> I can also try the G 50 chipps made with a Laimet screw chipper and other
> G 30 from a modern Jensen disc chipper.
> If the old Jensen's chipps would work, that would be marvellous!
>
> I'll let you know.
>
> Rolf
>
>
>
>
>
>
> On Thu, 14 May 2015 22:35:04 +0100
> ajheggie at gmail.com wrote:
>
> > [Default] On Thu, 14 May 2015 15:44:58 -0400,Crispin Pemberton-Pigott
> > <crispinpigott at outlook.com> wrote:
> >
> > >A related question for Tom Miles:
> > >What do you think of the possibility of running a steam stream into a
> TLUD
> > >with the primary air to pass water vapour into the pyrolysis zone to
> create,
> > >at a lower temperature, H2 and CO. This will have the effect of
> decreasing
> > >the heat available in the fuel bed and increase the CV of the gas
> produced.
> >
> > If I may butt in; this water gas reaction depends on the steam meeting
> > with hot char at above 800C to convert most of the water, it is highly
> > endothermic, so I doubt the descending pyrolysis front is hot enough
> > and even if it were the endothermy and small mass of hot char would
> > very quickly quench the reaction.
> >
> > >This effect was accomplished by spraying water onto the hot coals in a
> coal
> > >gas plant. It reduced the temperature of the working environment and
> > >increased the CV of the "town gas".
> >
> > Yes but the mass of hot coke (and probably the brick lining plus the
> > fact the steam was superheated made the reaction possible for a while,
> > then the coals cooled and the  steam was shut off whilst the coals
> > were blasted with air to give a CO and N2 mix, this being endothermic
> > took the mass back up to above 1100C., The CO+N" at 1100C was then
> > burned separately to raise steam and repeat the process. This way the
> > output was H2 and CO nearly free of N2.
> >
> > AJH
> >
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>
> --
> Energies Naturals C.B. <energiesnaturals at gmx.de>
>
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