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Country Discussion Topics
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Sawdust compressor
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deadcarp    Posted 03-21-2004 at 07:18:02       [Reply]  [No Email]
Well i got this far - any reason why this wouldn't work? Well casing and like 1/8 steel - i'll be compressing it 3 to 1.


ray    Posted 03-27-2004 at 07:16:09       [Reply]  [Send Email]
I'm new to this, so forgive me, but if you pre-heat the sawdust to 350-400 deg f. and include a way to pin your plunger from release until cool, you're in business.

chow
r


dogbardave    Posted 03-22-2004 at 09:28:48       [Reply]  [No Email]
That sounds interesting. I'd like to see the final product when finished.

Seems you need something to press against. Would it be a vertical log splitter you're using?


TB    Posted 03-21-2004 at 16:52:26       [Reply]  [No Email]
looks good ther Deadcarp
However years I recall reading in Mother Earth y(years agoe) of a system that thay just burried water pipe in their sawdust pile. Using the decaying sawdust to heat water in a storrage tank and then used to heat the house. as I recall thay also coverd the pile with a rubber tarp and used a small aircompressor to collect methane gas and store it in innertubes for use in gas stove. Just a thought. Dont know how much sawdust you have.


Alias    Posted 03-21-2004 at 08:05:43       [Reply]  [No Email]
DC consider this. Instead of using the gate, make the pipe longer and use a hydrolic ram to force the sawdust into the mold. If the pipe is long enough, the compressed sawdust will extrude from the end in a perfect circle. By positioning a cut-off saw at the end of the pipe, you will be able to make each piece in the required length.
Or, you can grow corn and burn it and forget the sawdust. Which ever is easiest....hehehe..gfp


deadcarp    Posted 03-21-2004 at 17:49:45       [Reply]  [No Email]
well that's kinda what i have in mind: with the gate in place and the hopper full of hot sawdust, the (splitter-assisted) ram will force it to compress against the gate. Then i lft the gate and add another batch - when that pushes the cooling log a bit further, the gate goes back down for compression and so on. The finished logs should drop out of the right end. I hope. Hard to tell how much pipe i'll need to cool them enough. :)


Salmoneye    Posted 03-21-2004 at 07:48:46       [Reply]  [No Email]
And what are you going to use for a binder...

And what is the end product for?...'Firewood'?


mike    Posted 03-21-2004 at 14:36:39       [Reply]  [No Email]
wonder about adding used oil to it to increase the BTU's? I run a bunch of it through my outdoor furnace


deadcarp    Posted 03-21-2004 at 07:56:01       [Reply]  [No Email]
Well i hope to heat the wood enough to bind iteslf. The end product would be a burnable form of sawdust, like firelogs. I could trickle sawdust too, but with the inevitible fine stuff, that can get downrite hazardous.

Supposedly you heat it to boiling to drive off excess moisture, compress it to 1/3 and when cool it stays together. I'd sooner press logs than cut trees. :)


Tinker    Posted 03-21-2004 at 14:30:19       [Reply]  [No Email]
Just curious..
If its pine sawdust, wouldnt there be enough pine sap heated up while boiling to stick things together after its compressed?
Do you put the hot,wet, steaming sawdust into this tube? If so..do you have holes drilled like a sieve to let the pressed moisture drain out and away?
I like this idea..keep going Deadcarp!


deadcarp    Posted 03-21-2004 at 17:57:07       [Reply]  [No Email]
well there shouldn't be any pressure until i compress the stuff - most of the steam is driven off before they get squished. I'll make the ram loose enough to not really trap air or anything. And once a log is formed, the gate comes up so there should be one open end in case they expand some.


Huh...    Posted 03-21-2004 at 08:15:40       [Reply]  [No Email]
Learn something new every day...

I just learned about compressing sawdust and that I would rather just cut trees that are already staying together...Way less work and energy input...

If you put in a certain amount of BTUs to heat the wood and make it stay together...Why wouldn't you just use the same BTUs to heat the house in the first place?

lol

Salmoneye, And His Monkey Wrench


ron,ar    Posted 03-21-2004 at 11:18:57       [Reply]  [No Email]
I think he already has an excess of sawdust he hopes to use as a fuel source rather than just letting it rot.


I understand that...    Posted 03-21-2004 at 12:05:23       [Reply]  [No Email]
But why would you use energy to make energy...Seems rather self defeating...

Use heat to make sawdust stick and fuel to make the ram run...Just use fuel to heat house?

Dunno...Just wondering...

Salmoneye


deadcarp    Posted 03-21-2004 at 17:40:32       [Reply]  [No Email]
Well i'll let y'all know - granted the log splitter will use a little gas, but they say they can use the waste sawdust (the fine stuff) to heat the rest enough to drive the moisture out. I'll probably heat it with a slab fire but they're essentially waste around here too. And i do burn about half slabs to heat the place now. Nuthin perks a lazy fire or penetrates a wet oak log like the hot creosote from a handful of birch slabs. :)


toolman    Posted 03-21-2004 at 14:16:33       [Reply]  [No Email]
use energy to make energy all the time all over the place , burn coal ,gas to make electricty etc., man on a mission, thats how we find better ways.isn,t it.i think anyways.lol/


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