[Gasification] Composite Residue Logs
Jeff Davis
jeffdavis0124 at gmail.com
Mon Sep 8 12:22:07 CDT 2014
Kelly,
The short answer is; I don't know.
I've found that logs moved with a forwarder are cleaner than a stem
moved with a cable skidder. So this bundling scheme should reduce the
amount of foreign matter, assuming that the bundles are moved with a
forwarder. Also, the wood bundled would be picked where it was fell so
lessing the problem. The furry critters should attend the morning crew
safety meeting.
Cheers,
Jeff
On 09/08/2014 09:51 AM, Kelly Burnham wrote:
>
> Jeff,
> How is the separation of foreign matter (sand, rocks, furry critters)
> handled in the bundling process?
>
> Kelly
>
> On Sep 6, 2014 5:30 PM, "Jeff Davis" <jeffdavis0124 at gmail.com
> <mailto:jeffdavis0124 at gmail.com>> wrote:
>
> One recent innovation involves the compaction of logging residues
> into cylindrical bales called composite residue logs (CRL) or
> biomass bundles (Johansson et al, 2006). CRLs are approximately 24
> inches in diameter (61cm) and 10 feet (3m) long.
>
> https://www.youtube.com/watch?v=XZOoHUEgf8w
>
>
> One of the most appealing aspects of CRL is, they can be handled
> similarly to round logs. Bundles are efficiently handled and
> transported with conventional equipment used for roundwood. Simple
> modification to the trailer may be required depending upon CRL
> length and makeup. The 1490D Slash Bundler can produce 18 to 26
> bundles per hour. Cost to bundle at the logging deck is
> approximately $11 to $14 per green ton. Total cost of operations
> to gather, bundle and deliver is $21 to $25 per green ton. A blend
> of pine and hardwood offers best economic advantages due to the
> amount of available material on ground, relative ease of handling
> and energy content. The calorific heat content has been measured
> at 10 MJ per green kg (4300 Btu per green lb) and an energy
> density of 4.5 GJ per m3. By comparison, calorific heat content of
> oven dry bundles yield 19.7 MJ per ovendry kg (8500 Btu per lb).
>
> Slash bundling offers superior storing characteristics. Private
> data shows that seasoning bundles (storing) for 11 months reduces
> moisture content to 25 percent to 30 percent and increase energy
> value to 17.2 MJ per kg (7400 Btu per pound). The post-seasoned
> delivered cost is $
14.50 per ton. To date, approximately 67,280
> m3 have been bundled from 15 sites in East Texas. The best
> comminution option appears to be horizontal grinders at a
> terminal. Grinders accept bundles easily and costs are minimized.
> Independent data show a 65-percent reduction in grinding costs,
> using a 1,500 horsepower electric motor from parasitic load of the
> electric power plant for which the bundles are serving.
>
> http://www.extension.org/pages/26530/bundling-woody-biomass
>
>
>
> Cheers,
> Jeff
>
>
>
> _______________________________________________
> Gasification mailing list
>
> to Send a Message to the list, use the email address
> Gasification at bioenergylists.org
> <mailto:Gasification at bioenergylists.org>
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
>
> for more Gasifiers, News and Information see our web site:
> http://gasifiers.bioenergylists.org/
>
>
>
> _______________________________________________
> Gasification mailing list
>
> to Send a Message to the list, use the email address
> Gasification at bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
>
> for more Gasifiers, News and Information see our web site:
> http://gasifiers.bioenergylists.org/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/gasification_lists.bioenergylists.org/attachments/20140908/0eab559e/attachment.html>
More information about the Gasification
mailing list