[Stoves] [Gasification] Important fuel processing Re: Repetitive Cross-Cuts.

Wed Jan 5 01:49:07 CST 2011

paul, this is a spiral shear chunker.  i agree they are rather
interesting.  there are quite a few getting made in various parts of
the xgas world.  i had not seen this one you found, nor the guy doing
it.  he is new.  where did he come from?

awhile back i put together a list of all the chunker schemes i've
seen.  there are about 5 different spiral shear types listed.  see
here.
http://wiki.gekgasifier.com/w/page/6123718/FrontPage .  please add any
new ones found here if you can.

there is one i proposed to do in the lid of a 55gal drum, using a car
starter motor for the drive.  never made it, but it might be an
interesting way to do it cheap in the dev world.

i think it is likely be better to fix the gasifier so it can use more
common fuels, via more common size reducing machines, than to require
everyone to get/make a special fuel prep machine.  disk wood chippers
are already everywhere, and with some work, the gasifier can work on
this fuel.  beyond there things get much more difficult though.

or make this one too.  we need more cutting devices.  some time put in
on optimizing the making of spiral shears using sliced propane tanks
as the blade might be interesting.

jim

On Tue, Jan 4, 2011 at 11:35 PM,  <psanders at ilstu.edu> wrote:
> Dear Andy, Andrew, Alex, Crispin, all Stovers, and of interest to
> Gasification folks also.
>
> Wonderful device!!   see it at:
>
> http://www.youtube.com/watch?v=lZCiCL6cffM
>
> Different, and more simple than the choppers I saw with Ed Burton and Phil
> Jorgensen in Willets, northern California.  They use hydrolyics and can stop
> and reverse the cutter if needed.  Are there other options that need to be
> also recognized.
>
> I want one.  Andy, we need to talk.   (on Skype at   paultlud    or phone
> 309-452-7072   or email )  Did you build this yourself?
>
> Looks to me like no teeth.  It is a shear.  the cutting blades are tapered
> so only a small amount of wood is cut in each cm of the rotation.
>
> Safety features are lacking, but that is not the topic here.  The topic  is
> that it works for chunking of wood.  Engineering will add the safety
> shields, etc.
>
> Size of chunks is not the issue either.  Clearly can be scaled.  This unit
> is powered by a power take-off (PTO).  You can see it spinning.  Geared down
> to the right speed.  So it can be geared to almost any speed and torque
> needed.
>
> Also, the fuel could be in a trough at maybe 45 degrees from vertical, and
> come sliding down and hit a stopper to give the desired length.  And
> possibly fed from two sides.
>
> And the woody biomass could even be of brush-type and the crosscuts would
> give many short pieces with each slice.
>
> For power source, I had a plan for using the power wheel of a regular
> car/vehicle.  Kevin and I talked about this many years ago.  The power part
> is fine, but I did not have the shear like Andy has.  Simple to combine the
> two concepts.
>
> Also as a power source for a SMALLER unit for smaller pieces, this shear
> concept could be built to run from the power of a junk rotary lawnmower.  I
> have wanted such a device for years, and now the missing component is quite
> evident.  (Too bad my wife threw away a couple months ago the junk lawnmower
> that I was saving for just such an opportunity.  Now I need to find another
> one with the right features to make transition easy.)
>
> My partner in Chip Energy (Paul Wever, who Andy knows) could make such
> devices easily.  And so could Crispin in the Swaziland factory or wherever
> he gets his hands on the tools.
>
> Recent conversations about bamboo as fuel hit a snag about cross-cuts.  Now
> that is no longer an issue.
>
> Okay, how do we proceed to accomplish the availability of this cross-cut
> technology to people who could well use it?  This is for both the affluent
> countries and the developing societies!!
>
> Dr. TLUD Anderson       psanders at ilstu.edu
>
>
>
> Quoting Crispin Pemberton-Pigott <crispinpigott at gmail.com>:
>
>> Dear Andrew S
>>
>>
>>
>> That unit sounds like it has teeth and I see there is a certain rotary
>> kick
>> to it sometimes.
>>
>>
>>
>> http://www.youtube.com/watch?v=lZCiCL6cffM
>>
>>
>>
>> Can you confirm that it has some sort of coarse teeth? Are there teeth on
>> the stationary portion so rotation is largely prevented?
>>
>> Certainly a great device - never saw one before. It is obvious that if the
>> feeding was horizontal you could have two people feeding, one on each
>> side.
>>
>> We didn't get to see the final product up close. Do you think it is suited
>> to a medium to large TLUD?
>>
>> Dr Paul A, what do you think of the chunk size? The power level looks low
>> for something that can take on such large pieces. Very attractive.
>>
>>
>>
>> Regards
>>
>> Crispin
>>
>> Andrew,
>
> Neat.
>
> I kept trying to count your fingers but lost track every time my eyes closed
> :)
>
> Al
>  e
>   x
>
>
>
> On 1/3/2011 1:30 PM, andy schofield wrote:
>
>
> [Show Quoted Text - 44 lines][Hide Quoted Text]
>
>
> Hi Andrew,
>
> Good to see you here! I have been wanting to read Stoves for a long time.
> Doc T-LUD Anderson inspired me recently to join the list.
>
> A polished brass T-LUD installed down below with a proper charley noble,
> could
> extend the short yachting season here in the chilly Great Lakes.
> Diesel stoves smell horrible!
>
> Two kw/ hr of heat to make coffee, and melt the frost from one's beard,
> would require about two pounds of cherry pits.
> This would be perfect for a certain antique H-28 I sail. The boat:
> http://www.youtube.com/watch?v=e1tay_HUxNY
>
> The cost of pits at retail-outlets is high, because packers use propane
> to dry them.
> So for many, chopping wood is the best option to fuel a gasifying-stove.
> Here is the method I use to cross cut maple blocks:
> http://www.youtube.com/watch?v=lZCiCL6cffM
>
> Give my regards to Ken, next time you talk.
>
> Andrew Schofield
>
>
>
>
>>
>>
>
>
>
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