[Stoves] Cuber and size of densifying machines

[Crispin Pemberton-Pigott]

Hmm... I wasn't thinking of digesting it first - more like torrefying it so that some 'liquids' emerge that harden when cooled.

Fibreglass insulation is made with, for example, 2% bakelite to make it rigid enough to stand up on its own. If the binder/stiffener could be something that is already in the fuel, it could be flowed, under pressure, and cooled into a briquette.

Is this chemically possible?

Regards
Crispin in absolutely freezing Waterloo

BB10 Rocks!
From: Richard Stanley
Sent: Saturday, March 15, 2014 18:21
To: Discussion of biomass cooking stoves
Reply To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Cuber and size of densifying machines


Crispin,
Intersting idea:
 My first thought is that one might have to dilute it and render it down like cooking fat to concentrate it, then compress that and dewater the remaining unabsorbed goo.  Or you can go to Mbale Uganda and scoop some of the stuff up !
Seriously, it seems to take several weeks in a humid hot environment a little compression and heat covered in black plastic to accelerate decomposition, might be really effective . The glue is not particularly combustible though, at least to my informal and long distant recollection.
Richard

On Mar 14, 2014, at 9:14 AM, Crispin Pembert-Pigott wrote:

Dear Richard, Robert, Chris A and Anh

Can rice hulls be baked in a process that causes the lignin to be released but no evaporated or destroyed, and have it glue itself together with that when cooled?

I am thinking of compressing it into a large block using weight on top, then heating it as a retort using some of the available hulls. The product would be a giant chunk that could be sawn by hand into shapes.

As long as it involves energy that comes from wasted hulls, and machines that are no-wear, it might make for a partially densified product that would survive handling.

Regards
Crispin


Robert and Richard,

Vietnam used to have problem with excess rice husks at mills too, but now they all make rice husk briquette, pellets so it turn from waste to tradable goods. We have many rice husk pellets makers here for both domestic and export.

As far as I know, dealing with high abarisve silica in rice husk require a much more expensive equipment. Low cost rice husk briquette machines can serve well for simple tasks such as daily cooking or simple commercial/industrial production.

Anh



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