[Gasification] Small JXQ-10 forum, sort of.

jim mason jim at allpowerlabs.org
Mon Dec 19 01:17:46 CST 2011

pete, thank you for the interesting report over on your site.  i
enjoyed it, especially the musings on dolomite for tar cracking.  it
seems you are getting dolomite to go through the reactor and not slag.
 that's interesting and good.  at imbert temps you'll get slagging.

considering a separate route, i'm curious if any of you have
experimented with a center air tube with spread nozzle at the end.
this might an interesting way to convert the basic open core unit to a
nozzle based one.  as you know, holding the flame front in one single
place at different flow rates is a basic problem of the open core
design. later efforts went to multi level air inject to get such
control, but still without a close top those nozzles don't create much
blast and the cross sectional area of the bed is not covered with tar
cracking heat.

the center air tube with spreader nozzle would be easier than adding
nozzles through the sides of the reactor.  you could weld a couplers
with threads into the lid, then be able to change downtube heights and
different configurations.  add some seal on the lid so air can't get
around it.

the spread nozzles would be like the buck rogers design.  here's the
patent with a drawing of what they did.

interestingly, one of the main guys who did the buck rogers visited us
awhile back and he disabused me of the understanding that these radial
pipes were spread nozzles.  that's what we've always told ourselves
here, but he said they ultimately only used them for agitation.  they
mostly control flame front height by variable grate and center tube
shaking, essentially moving the material through faster or slower to
keep the front in the correct place.  i was very surprised by this, as
i thought the whole point of that assembly was to create the
equivalent of a combustion spread lobe to mimic what you get in a
throat and nozzle type.

despite what they did in the end, you can do differently.  i think it
would be interesting to see if you could improve performance with this
type of motivated air control.

maybe even try multiple tubes down the side with elbows to direct
inward.  essentially make the nozzle ring, but fed from the top.  you
could add a slide in cone taper too to get the imbert type


On Sun, Dec 18, 2011 at 2:47 PM, Pete & Sheri <spaco at baldwin-telecom.net> wrote:
> This message is for any users of the JXQ-10 or Stak 10K gasifiers (or anyone
> seriously interested in obtaining one) who intend to use them to produce
> engine grade  fuel.
> The question on everyone’s mind is:
> “How can I make my machine produce engine grade gas for decent periods of
> time?”
>   Several people have had partial success so far.  I (we) know that this
> device isn’t an imbert style machine, but we who have them do want to see
> how far they can be pushed.
> To that end:
>    I have been accumulating correspondence between myself and about 15 other
> users/interested parties since June of this year.
> -Many questions have been asked and answered.
> -Several members have been reporting test results
> -Several members have been making changes and modifications to the machines
> and the process.
> These messages are simply arranged (roughly) by date, by  correspondent,
> newest entry first, on the following webpage:
> http://www.spaco.org/Woodgas/JXQ-10forum.htm
> If you are a user of one of these machines (or are seriously interested in
> getting one), and have some input or some serious questions, please check
> out that page and give us input as you see fit.
> NOTE:  Senior members of this list are unlikely to gain any new knowledge by
> visiting this page.---- yet, anyway.
> Pete Stanaitis
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Jim Mason
Website: http://www.whatiamupto.com
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