These plants are suitable
for work highly polluted materials, which must be separated from
contaminants before moving to subsequent stages of processing: film,
mixed plastics, rigid plastics, bottles, granules, coming from
selective waste collection, industrial waste, post consumer
material, agriculture, production scraps etc.
[Agricultural and post consumer film
FMWP] [Recovered Granules PWP]
[Mixed plastics MXWP]
[Rigid plastics RGWP]
[Agricultural
and post consumer film FMWP]
Type of material that can be processed:
Film with various thickness coming from selective waste collection, industrial waste, post consumer material, agriculture etc.
Characteristics of material exiting the system:
Ground film, size around 20 mm, perfectly clean with a humidity percentage less than 3% ready
for pelletizing or densification phase.
[Recovered
Granules PWP]
Type of material that can be processed:
Dirty plastic waste and granules coming from collection from the ground or other, with various dimensions in function with the capacities not exceeding a diameter of 12 mm.
Characteristics of material exiting the system:
Material perfectly clean and dry.
[Mixed
plastics MXWP]
Type of material that can be processed:
Mixed plastic (bottles, containers, bags, sheets, cups, baskets, flasks etc) with high contamination level (glass, ceramic, metal, sand, soil,
oil, organic material etc.).
Characteristics of material exiting the system:
Material separated depending on incompatibility in extrusion,
ground, washed and with a humidity percentage of less than 3%.
[Rigid
plastics RGWP]
Type of material that can be processed:
Rigid materials such as PP HDPE ABS PC flasks, containers, electric batteries, production waste, vehicles separation waste etc.
Characteristics of material exiting the system:
Ground material, size around 12 mm, perfectly clean with a humidity percentage less than 3% ready to be passed to the re-granulation phase.
Description of machine functions
SHREDDING
The material can be melted or in bales and can be loaded
directly on to the grinder by means of a "mechanical spider" or by
means of a conveyor belt equipped with a metal detector.
The (TM series) grinding machines process material with high
pollutant degree: the rotor shaft has various offset blades,
contrasted by fixed blades positioned inside the work chamber. These
blades are particular because they can work in both rotating
directions. In fact, these machines are equipped with a force
control that manages the reversal of the rotating direction of the
rotor in the case that the material present is difficult to mill.
These machines can be prearranged for using water jets.
SCREENING
The line is initially made
up of a rotating screen (VR series), designed and realised to be
used during the screening of thermoplastic materials in order to
eliminate the pollutants with a greater dimension than the holes
used, increasing the effectiveness of the operation during washing.
By varying the cylindrical screen inclination and its rotation speed
in function with the type of pollutants present, it is possible to
change the flow rate of the system and the effectiveness of
separation.
PREWASHING WITH WASHING CENTRIFUGE
Washing centrifuge (CP
series) is developed to treat high polluted materials, with
medium-high dimensions.
The material fed inside
the machine undergoes a first washing phase and a second centrifugal
action, which allow a rough separation of the pollutants.
The water employed is
discharged together with the pollutants into a specially provided
collection and disposal section, whereas the material is discharged
by means of a hopper and is sent to the next process stages.
PRE-WASHING AND
SEPARATING WITH TANK
The material pre-wash system is entrusted to the VP tanks
series.
The pre-wash tank
separates mainly the highest possible quantity of pollutants and
heavy plastics from the polyolefin.
It is useful for
eliminating all pollutants considered dangerous for safeguarding the
blades of the grinder that will determine the dimensions of the
material.
GRINDING WITH WATER
The grinders for washing (GL series) receive at the same time
water and material and can be prearranged for the use of further
water jets. In this mode, besides reducing the marking of the
material to the desired dimensions, they wash and centrifuge.
WASHING OR RINSE
If worked with water, the material is withdrawn by means of an
auger with a water separating system. In this mode the contaminated
process water is eliminated before moving on to the successive
washing phases entrusted to the VL tanks series
This type of tank operates by means of dynamic action with special
rotors located above the open water channel that by means of their
scoops, sink and push the material up to the extraction section.
Their speed can be varied using the manual motor reducer.
The pollutants that plunge to the bottom are taken to the drain from
an auger in counter flow and unloaded using a further tilted auger.
CENTRIFUGE SPIN-DRYER
Centrifuges (CF series) offer quick and ideal separation of soft
pollutants and water accumulated by the material.
The system foresees the use of a rotor equipped with a scoop with
special inclination, which by centrifuge force projects the material
against a separating screen and allows it to advance towards the
drain section at the same time.
DRYING
The drying systems include the use of combined heat and
mechanical energy.
Depending on the
characteristics of the material and of the plant, it is possible to
apply different drying types at the same time or alternatively: the
models UPEF, UEF, RG, PDU.
These can be distinguished by path types, air heating systems and
types of material dosage separate from the external environment.
In all modes, the air-material mixture control and relative
temperature control is electronically programmed by the PLC.
On exit, a humidity residual less than 3% is guaranteed, useful for
entering directly into extrusion.
STORAGE
The treated material can be stored in appropriate silos (FS, HSF,
SO4, PS, VM series) or directly into big-bags.
