Dinamic P300 /200 Wood Pellet Making Machine

P SYSTEM PELLETTING MACHINES - P300-4 11 Kw (max 200 kg/h) AUTOMATIC PELLETTING MACHINE 11 KW FOR MAKING BIOMASS
The most common pelletting machines are mechanical machines, that work with meccanic pistons and have no electronic part making the machine function. Since there is no electronic in this kind of machine,
they break very easily and therefore the after sales service for such machines is very important, leading
to heavy investment costs, both initially and during production.
P System has introduced electronic functioning in the pelletting presses.
P Systems pelletting presses summarizes the high technological components as a result of research and
tests, with the aim of avoiding having additional costs for the maintainance and the working stops.
Thanks to the new system called "SOFT START" , P System machines do not need to clean the holes of
the die plate while starting the machine.
With the hydraulic system "LOAD SENSING", the machines work and stop automatically avoiding
stoppages or breaking of the die plate. The main innovation P System has introduced in fact is on one
side the use of a clutch, of a speed control and of different gears that help the machine not onlt to get
started, but also to adjust the speed according to the type of material introduced in the machine, and on
the other shock absorbers that help the machine to aborbe the shock caused by the extrusion process of
pellet making.
COMPLETE WITH ROLLER
KIT- ANTICONDENSES KIT-LUBRIFICATING WITH GREESE KIT
REFINER 4 KW
PELLETS' DISCHARGE COOLING FEEDER (if more than
one machine is installed a conveyor belt must be used)
COOLING TANK 4000 L COMPLETE WITH AIR COOLING KIT
(WITH PREDISPOSITION FOR DUST REMOVER ASPIRATOR)
ELECTRONIC SCALE 0-30 KG
AUTOMATIC BAGGING MACHINE (THERMOWELDER)
650x450x15 KG
PELLETTING PROCESS
Pelleting process of waste of wood (sawdust) can obtain small pressed cylinders of 6 mm diameter and
that are mainly used in domestic stoves.
Although for domestic use the standardised diameter is 6 mm, the size of the pellets can vary from 3-4
mm to 20 mm diameter according to the settings of the machine.
The process consists in an initial reduction of size of the recoveries of wood with use of a crushing
machine that allows to gain small pieces of wood of 3-4 cm in size, the chips. The crushed material is
then transported to the hopper from which it is extracted and refined with a grinder refiner. The product
that is obtained from the refining process is a homogenous sawdust, that can be pressed in a pelletting
machine that by means of a pressure and extrusion process gives to it the shape of cylinder.
The pelletting machine is similar to a great rotor that has a pierced ring (called extruder) that turns at a
speed of approximately 150 turns/min. Inside the extruder there are the pressure rollers that push the
sawdust in order to make it extrude through the holes of the extruder.
The pellets of length defined according to the position of two knives come out from the extruder.
The extrusion process produces a remarkable heating of the pellet that can reach also 90°C. For this
reason it is necessary to cool the pellets by means of the air that is forced to pass through the pellets in
an appropriate cooling hopper from which the pellet is sent to the automatic bagging machine and then
weighed with an electronic scale.
Raw material can be in different solutions:
1) pallet or pieces of wood of important dimensions;
2) chips or wood waste (up to 5 cm. of dimension)
3) shaving or mixture shaving/ sawdust;
4) sawdust.
Without having to substitue the die plate the hydraulic system let all different wooden materials to be
compressed.
The material must be refined with a 3-6mm screen.
P System machines are standarized, but never the less they must be customized according to the exact
material that the final customer must pelletize.
If working with conifer trees with high resin componets (pines, firs) the machine will be able to work at
its maximum capacity, but if non conifer trees are used, therefore more hard and dry, the machine will
automaically reduce speed of 50%.
Since when making pellets the machine is always at its maxium power (when macking briquets the
machine is at its maximum power only for a few seconds of every cycle), it is not possible to keep the
pelletting machine going always at maxium speed. It must be kept at a speed around three quarters of
its maxium speed. In addition the machine must not work more than 8-12 hours per day.
In every machine there is included an extra kit of the roller, so that if the one installed on the machine
breaks down, it can be substituted immediately and the broken one can be sent to P System to fix.
In addition the lubrificating greese kit and the anticondenses kit are included.
The only optional kits are:
- kit for cooling the oil of the gear reducer (the clutch) (absolutely necessary for those who want to use the machine for more than 8 hours per day)
- the humidity kit (if the wood to pellet is too dry)
The humidity in order to pellet must be around 10-15% (10% min for non conifer wood, 15% max for conifer wood) . Over 15% humidity it is necessary to adopt a dryer machine due to the fact that it is hard to make the wood stick together.
With dryer machines the wood will come out very dry. If the wood is being dryed to make pellets, it will be possible to make humidity of output around 10-15%, but if the wood is bought from someone that has dried it, most probably it will be to o dry.
In this case it is essential to use the humidity kit in order to bring humidity at 10-15%.
The same result can be achived by mixing dried wood with conifer high resin wood, or by adding to the dry wood It can also be used lignin or potato flour, oil or starch.