[Gasification] making wood pellets

[kenn johnsen]

Just a few words about pricing, a big surprise it was about your cost  
of wood pellets, it is almost the same as here in DK.
Here, ashes 0,5 % water 8 % 1 meterton of bags 40 pound C357 - 7 meter  
ton per ton C340.

Another one, ashes 0,5 % water 6 - 9 % loose delivery by a truck blown  
in, to your place, 8 mm. 5 meterton per ton C423 - 30 meterton per ton  
C381
Sales tax here is 25 %.

Kenn
fredag 1. sep 2006 kl. 12:21 skrev Kevin Chisholm:

> Dear Mark
>
> Not only are you forgiven for stating the obvious, but I commend you  
> for
> doing so. :-)
>
> Nobody would consider trying to run an engine designed for gasoline on
> diesel fuel. Similarly, why should we expect a gasifier that ran well  
> on
> sawdust to run well on chips or chunkwood?
>
> I would suggest that "forcing the fuel to fit the gasifier" is as  
> wrong as
> "forcing the gasifier to fit the fuel." Rather, we should be taking the
> available fuel and seeking to match it best with an appropriate  
> gasifier
> system. In that there is no such thing a "Universal Stove", there is  
> no such
> thing as a "Universal Gasifier."
>
> Wood pellets sell, at "the store" here in Nova Scotia, for about  
> $C5.50 per
> 40 pound bag of 5% moisture fuel.  $C275 per short ton, or say
> $290 per Bone Dry Ton Equivalent. Wood chips at about 45% moisture cost
> about $C30 per ton, when purposely made for fuel, and, like sawdust, is
> often available at zero cost, plus an allowance for delivery, when  
> disposal
> is an issue.
>
> Allowing say $50/ton for bagging, and say $75 for the Merchant suggests
> about $150 per ton of pellets, in bulk, at point of manufacture. This
> compares to about $75 per BDTE for chips or sawdust.
>
> Perhaps a better macroscopic way to proceed would be as follows:
> 1: Determine the characteristics of the available fuel
> 2: Determine desired end use for fuel gas
> 3: Configure a gasifier and processing system that minimizes total  
> cost per
> delivered BTU/Hr.
>
> Best wishes,
>
> Kevin
>
> ----- Original Message -----
> From: "Mark Ludlow" <mark at ludlow.com>
> To: "'Jeff Davis'" <jeff0124 at velocity.net>;  
> <gasification at listserv.repp.org>
> Sent: Friday, September 01, 2006 1:16 AM
> Subject: Re: [Gasification] making wood pellets
>
>
>> Jeff and List:
>>
>> It seems as though the production of suitable gasifier feedstock may  
>> be
>> one
>> of the core criteria of successful gasifier operation from woody
>> feedstocks.
>> (Forgive me for stating the obvious!) Most of the methods of  
>> consolidation
>> into forms that do not bridge upon feeding and form suitable char beds
>> upon
>> gasification that have been discussed on this list seem energy (and
>> capital!) intensive in themselves.
>>
>> Straw and sawdust can be pelletized with a 'California Mill' type of
>> machine, but not a great rates-per-horsepower of shaft power. Small  
>> blocks
>> of wood are hard to create; the mechanical properties of wood that  
>> make it
>> so valuable as a construction material also make it difficult to  
>> shear,
>> split and compress.
>>
>> It made be appropriate to revisit the fundamental assumptions of  
>> gasifier
>> designs that specify a tightly regulated form factor for feed. Energy
>> spent
>> chopping logs into 30cm chunks is not conserved.
>>
>> Mark
>>
>>
>>
>> -----Original Message-----
>> From: gasification-bounces at listserv.repp.org
>> [mailto:gasification-bounces at listserv.repp.org] On Behalf Of Jeff  
>> Davis
>> Sent: Wednesday, August 30, 2006 10:54 PM
>> To: gasification at listserv.repp.org
>> Subject: Re: [Gasification] making wood pellets
>>
>>
>> On Wednesday 30 August 2006 08:58 am, Gm Parts Source wrote:
>>> When you speak of the dies are you referring to the necked down area
>>> of an extruder?
>>
>> Sounds correct. It's where the pellet gets it's shape.
>> It's also the large ring on the ring pelleter.
>>
>>
>>> IF so has anyone experimented with a large pellet perhaps using a  
>>> wood
>>> splitter type setup to generate the pressure and simply compressing
>>> the sawdust into a round tube?
>>
>> This is a form of pelleting. Think it's called the hydraulic ram  
>> pelleter.
>> It's mainly used for metal shavings from lathes and mills. Kind of  
>> slow.
>>
>> There is also the mechanical piston pelleter and some people have made
>> them
>> from a hay balers. But in regards to biomas fuel, this pelleter suffer
>> from
>> variations in copact density and the fuel is not as good as from a  
>> screw
>> press or I would think ring pelleter.
>>
>>
>> Jeff
>>
>> --
>> Jeff Davis
>> Somewhere 20 miles south of Lake Erie, USA
>> http://www.velocity.net/~jeff0124
>>
>> _______________________________________________
>> Gasification mailing list
>> Gasification at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/ 
>> gasification_listserv.repp.org
>> http://www.repp.org/discussiongroups/resources/gasification
>>
>>
>> _______________________________________________
>> Gasification mailing list
>> Gasification at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/ 
>> gasification_listserv.repp.org
>> http://www.repp.org/discussiongroups/resources/gasification
>
>
> _______________________________________________
> Gasification mailing list
> Gasification at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/ 
> gasification_listserv.repp.org
> http://www.repp.org/discussiongroups/resources/gasification
>