[Gasification] Sawdust in Fan TLUD

Thomas Koch tk at tke.dk
Sun Jun 5 03:06:34 CDT 2011

I am avare of 2 european biomass densification processes that has been operating based on the roller principle.
One is a Class developed portable machine that produced chipboard plate type product in the same shape as corrugated steel plate. The density was high 900-1100 kg/m3 and the product quality was very good. The capacity was moderate 3-5 tons pr hour  and the energyconsumption high 4-600 kW (I never understood why?)  and the weight was too high - 20-25 tons - to operate in the fields.
The other was from Silsoe in UK - i only saw pictures - it produced balls like for barbecue - there was some discussion about this machine for some years in 1990-1995 but it was never possible for me to see it.   

Conserning your experince about chinese products - i have had similar experinces - i you ask for the origin of the idea they become very silent.

Best regards

Thomas Koch 

Fra: gasification-bounces at lists.bioenergylists.org [gasification-bounces at lists.bioenergylists.org] på vegne af Rolf Uhle [energiesnaturals at gmx.de]
Sendt: 5. juni 2011 10:38
Til: Discussion of biomass pyrolysis and gasification
Emne: Re: [Gasification] Sawdust in Fan TLUD

Once i saw a video of a chinese cuber on youtube, but I was never able to find
it back.
I remember a small , portable machine with a diesel or tractor drive.
There was a belt or chain conveyor which took the hay or whatever up to
thecuber wheels which-in may memory -were conically shaped.
I saw sawdust cubes on a fair in Stuttgart some years ago presented by a
chineese company, but they never answered my mail asking for the origin of the
Would be hard pressed to remember that chinese exhibitors but I still have a
picture of that young lady representing them...

Who knows about chinese cubers ?


Am Sonntag, 5. Juni 2011 07:25:20 schrieb Tom Miles:
> Art,
> You seem to be describing the Osborn Hay Cuber. US Patent US3963405
> http://www.google.com/patents?id=DwsxAAAAEBAJ
> <http://www.google.com/patents?id=DwsxAAAAEBAJ&printsec=frontcover&dq=US396
> 3
>  405&hl=en&ei=rwXrTf_SE5CcgQet4o3ZCQ&sa=X&oi=book_result&ct=result&resnum=1
> &v ed=0CCgQ6AEwAA>
> &printsec=frontcover&dq=US3963405&hl=en&ei=rwXrTf_SE5CcgQet4o3ZCQ&sa=X&oi=b
> o ok_result&ct=result&resnum=1&ved=0CCgQ6AEwAA
> We new Glen Osborn very well. He was from Moses Lake, Washington. We used
> his cuber at the Straw Utilization Center in Corvallis from 1974-1977. We
> used three Osborne cubers in a facility to treat straw with sodium
>  hydroxide and to cube 10,000 tpy straw for export to Japan. We owned one
>  for several years after that and used it in California, Oregon and Idaho
>  for cubing everything from ensiled food wastes to paper waste for fuel.
>  I'll have to check to see what our actual production was.
> The cuber was robust. It was not as efficient as those made later by Warren
> & Baerg. It would take a coarsely shredded or ground material and make a
> fairly hard cube. I am sure that lots of energy was lost in the flailing
>  and mixing action of the gears and feed mechanism. It did run smoothly
>  when you have a uniformly sized material and ran a proper head of material
>  over the gears. Unplugging the dies that are internal to the gears was a
>  challenge.
> Regards,
> Tom Miles

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