Making an extruder Pellets

[Christophe]

Messages from: https://www.econologie.com/forums/schema-usi ... t4348.html

Finally, remarkable, no need to look, in Germany, not in China, after an investment comparable to a stove, you can make your pellets yourself with garden waste often burned in the open polluting a city, instead of burning in a stove with good performance:
It becomes possible to make its own pellets with free plant waste everywhere at home and elsewhere, neighbors and waste! with this remarkable PelletMaker PELLETIERE that takes all pieces of wood wholesale, reduces them to powder and spring granules for an investment of 5600 € less than a boiler !!!
Pelletpresse 3 KW 400V PelletMake for Stroh und Miscanthus
http://pellet-mill.de/shop/article_PM%2 ... 03.0E-S%26
http://cgi.ebay.fr/PelletMaker-PELLETIE ... 563fcabc96
See the videos !!!
only problem, 380V engine to change to 220V.
Finally it is possible to have just the basic parts for cheap (less than 300 €) and tinker his press if you have mechanical equipment.

A video of craftsmanship commented:
Traditional pellet press
http://www.youtube.com/watch?v=xePW9qzEuC8&NR=1
with recovered scrap and the purchased roll and base press.
http://www.aupoele.fr/index.php?option= ... &Itemid=79

... And the pellet coming out of your cherry pitter is Dinplus Certified, of course ...

Because for me, putting all the "crap" lying around in your garden in a Tinguely machine, it only gives something that may have the shape of a pellet, nothing more ...

Sorry, but do not confuse.

[dedeleco]

And these shit so dry burn as well for 0 € as the other very expensive ones by avoiding you to burn much worse by polluting in the open air at the bottom of the garden all the plants in your garden, as do most people in France.

I remind you that certain peoples have been heating themselves since the dawn of time with the dung and poop of their animals, as with the Yaks on trays without a single tree and very cold weather !!

[lv13r]

hello dedeleco
this machine looks good, but I have doubts about its operation because when you see the power it takes a shredder to grind branches of 10cm in diameter I doubt that 3kw is enough more we see on the video that the machine is load with branches covered with green leaf how is sawdust dried ????
on the other hand if this machine works properly
in what it is a revolution, because for the individual in the countryside the investment pays for itself in 2 or 3 years and the energy independence becomes very real
could you tell me if it is possible to see it working
or if the seller has an address where I can contact him
please
lv13R

[Christophe]

Check out this link: http://www.aupoele.fr/index.php?option= ... &Itemid=79

There is a link to spare parts: http://pellet-mill.de/shop/article_MK%2 ... 3%25986%26
and small ready-made presses:
http://pellet-mill.de/shop/category_2/1 ... =cid%3D%26

[dedeleco]

Hello lv13r:

when you see the power it takes a shredder to shred branches of 10cm in diameter I doubt that 3kw is enough

The power required is proportional to the speed at which the wood is crushed!
We can grind it by hand, slowly, by sawing by hand, tapping on it with an ax with our individual human power 100W, even for good sportsmen 200W !!
So this machine will grind fairly slowly and not 200t of wood per hour as do some chip mills on trucks with 300 to 900hp of power !!
So the power to shred 10cm of branch is due to the deceptive commercial policy which makes poorly made and rudimentary shredders at ultra low prices !!
If you add a saw, an ax and a little bit of trick, it will shred large branches slowly at low power, at the limit, like by hand, with 100Watts.
Anyway we burn the logs and therefore a log grinder is absurd and therefore not found for private individuals.

Industrial machines are optimized in maximum return, financially which is mostly fixed by the high labor price and interest rates, and what captive buyers agree to pay (308 € per ton even !!) !!!
So as long as le profit grows with size (which increases as much as the interest rates are low to pay the initial investment approaching the million € overall), the size and the power increase !!!!!

So the power is misleading, if we forget the operating time and the absurd financial realities of maximum profit (cause of the current crisis).

Time to cutting hedges and branches and picking in your garden is superior than pass through this shredder quite efficient for private individuals (next to a garbage collector at € 100 Chinese!) making pellets at its individual speed and more.

Finally, drying can be done in the sun in summer spread out on tarpaulins (like for hay) and returning to a silo at night to avoid condensation which rewets at night, even under a tarpaulin. (fact forgotten very often)!
This condensation at night with fresh air also wets the commercial granules in the silos gradually over months !!

Finally Yes we put the pellets near a stove (or logs) a day or more warm, with a draft of the heated room, they improve their drying much better before use, with a good yield, because we recover the heat of evaporation by condensation in the house on cold walls (windows, thermal bridges), system never used in commercial stoves and which improves performance on not very dry wood !!

You can use a dryer with a small passive solar thermal collector as discussed for a simple solar algae dryer on econology very efficient and simple in summer!


http://hal.archives-ouvertes.fr/docs/00 ... _625_0.pdf
https://www.econologie.com/forums/post164108.html#164108
https://www.econologie.com/forums/post184711.html#184711

[Christophe]

Question: to consume less power, better to grind dry or wet?

Completely dede, it is necessary to take into account the energy of "granulation".

[dedeleco]

I think that logically, it takes a little humidity for the granules to form in flexibility and hold with a little binder, reason to put a little bit of green leaves as on the video.
Too damp and flexible, the fibers will bend instead of breaking, which everyone notices on low-priced crushers.

It is obvious by hand, with perfectly dry sawdust, impossible to see it sticking, a little bit wet it compacts well when sticking, and too wet it flows too much and no longer holds.

So we must respect the mixture of dry and a little wet that we see on the video in my opinion !!
Apparently even the granules with the standards so perfectly dry, disintegrate more easily.
The manufacturers seem to put a% of binding products.

The energy of granulation must be related to the speed by viscosity and mechanical friction, and it believes like the speed of manufacture, and therefore the industrialists make them so quickly, that it dries the granules to read them !!
We stuff in a tube by pushing the sawdust and by deforming the fibers to compact them, which takes energy from mechanical deformation and releases friction energy linked to speed as for a brake and which heats up to the point of heat the press and dry if the speed is high.
We must be able to do the same by preheating the hole press of the personal pellet extruder to 80 ° C.

I think that manufacturing pellets industrially is complex due to the high speed and standards which I am not sure are all essential.
I do not find open scientific studies on clear granules which allow to understand well and therefore it is very empirical and secret, without understanding well and therefore certainly not the optimum.

The more I look at the heating, the more I see aberrations that leave me perplexed !!
See the difference with Canada !!
With Alain G who concludes: why keep it simple if you can make it complicated !!

[titiyador]

Hello everybody

I own some exotic animals, out of passion. So to feed them, I also started to breed rodents in a "cold" room of 9m², which is in fact now a warm room (heated to 19 ° C) for regular reproduction throughout the period. year.

For food I still recently bought pellets also called "caps" in the jargon of breeders.
Two drawbacks:
- € 14 per 25 kg bag (1 bag consumed per week on average) for the cheapest
- I have to pick them up 2 hours away from home (I take several, which means that I still manage to amortize travel costs).

So I learned about the manufacturing process of these granules, and it was three days ago that I went to get a small machine (model 9PK-120) imported from China of course, but no French manufacturer of after some research that I was able to do. Very serious seller (located in Mory Montcrux, in the Oise), not pushing for the purchase and who does not count his time to explain the problems and the way to proceed. Also even after the purchase, I had several questions and he answered me by email and very quickly (2 hours after sending on average).

So I bought this machine for 800 € HT, it will take a number of months for it to be amortized, not counting the time spent waiting alongside the machine to refuel and act in case of problems.
But I know what I put in it, I am independent, and above all, 25 kilos only come back to me at 5-6 €!

During the first use nothing came out. In fact "big paranoid" that I am, I did not put enough material for the pellets to form. So I dismantled the whole machine when it would have been enough for me to add a little more mixture (1/3 compressor sand (very fine), 1/3 oil, 1/3 dry sawdust (< 10% humidity)) ...

Finally, it gave me the opportunity to go take a little tour in its bowels and identify the pieces present!

So second test, this time with what I will put later: wheat, corn, faba beans, rapeseed (seeds), vitamins.

and there joy and relief at the sight of the first pellet.

Since then I have dismantled it two more times, whereas after the mixture intended for rodents has passed, I have passed a slightly fatty mixture which I keep aside in order to prevent the holes from forming when the machine cools down.

In addition, the machine vibrates more and more so I don't know if it's normal. I have the impression that it is the horizontal shaft of the motor which vibrates. Finally we will see later but I am happy with my purchase. Hopefully it will last long enough to pay for itself.

[lv13r]

hello titiyador
could you take pictures of the different parts of your machine
for the seeds and the wheat you pass them in a grinder before or you but all inside directly ??
please
lionel

[Ahmed]

Dedeleco wrote:

It is obvious by hand, with perfectly dry sawdust, impossible to see it sticking, a little bit wet it compacts well when sticking, and too wet it flows too much and no longer holds.

Any analogy has its limits! Do not confuse simple compaction by hand with serious granulation.
The considerable pressure of the machine generates intense friction which in turn causes heating, the consequence of which is liquefaction of the lignin (approximately 180 °).
It is this lignin which, once cooled, will guarantee the cohesion of the pellet, as it ensured that of the living tree.
Logically, a very dry material should be used; moreover, this dryness plays a non-negligible role in the good efficiency during combustion.

Regarding the machine titiyador, beware, these small Chinese machines are intended for the preparation of food pellets and not for the production of wood pellets!
If the principle is similar, the efforts developed in the latter case are much greater and require dedicated machines.