EQUIPMENT for simultaneous grinding and drying of materials
PERM
2012
SPECIAL FEATURES
EQUIPMENT SCHEME
Aerodynamic dispergator is a unique engineering solution, which reveals its advantages in effectively drying and grinding of different materials. It’s especially advantageous to process organic fibrous materials, as aerodynamic dispergator allows to dry, grind and separate the product of the required characteristics of humidity and size at the same time.
material feed
drying agent supply
Unique inertial separation allows to choose from a
When dispergator is working, material is moved to
zone of drying-grinding only that particles of material,
dispergator through special loading gate and gets
which satisfy given parameters of size and humidity,
to rotor with blades. Material collides with blades
avoiding unnecessary exposure to material. Drying
and grinds, under inertial forces material particles
and grinding of heat-sensitive materials are realized
tend to leave dispersion area. At the same time fan
efficiently.
blows down air through dispergator in order to return material particles to grinding area, so, the generation
Drying of materials occurs as a result of an intensive
of air-fluidized material bed at outer radius of horn
ventilation. The airflow, which provides drying o
rotation is executed. Particles traverse speed in air-
materials, is up to 30 000 m3 per hour. The speed of
fluidized bed is lower, than rotor traverse speed, that
drying agent is 25-28 meters per second relative to
executes energy, which is necessary for material
the material particles, located in an air-fluidized bed.
grinding.
Consumption of heat energy is 750-800 kW per 1 tonne. Aerodynamic dispergator consists of the following product yield
datum nodes: a horizontally-mounted rotor, composed of two disks, joint by radial blade. Rotor is put in cylindrical shell with special stator blades. Product selection is made from centre of apparatus coaxially relative to rotor rotation axis. Dispergator is linked with high-pressure fan by air duct at rotor rotation axis. The exit of fan is linked with cyclones, which are installed over discharge hopper.
1
ADVANTAGES
2 The solution of complex problems of drying and grinding of materials
SEPARATION
The unique technological solution of equipment and the applied principle of inertial separation define its advantages
Inertial separation, an ejection of ready grinded and
in comparison with conventional equipment. During the processing of fibrous materials the combination of the basic
dryable material, which is executed from apparatus
configuration allows to keep the fiber presented in the basic material.
centre under forces, made by intensive air flow. «Coarse» (large or/and humid) particles as a result of
Our equipment makes it possible to execute the grinding process in the necessary thermal conditions, producing a
inertial forces dominance rest in grinding area and
simultaneous drying of the material that allows to process heat-sensitive materials. Even if you only need the material
«light» (fine and dry) particles are taken away. Forces
grinding, aerodynamic dispergator, as a rule, works more efficiently in comparison with a similar equipment due to a
action influencing the inertial separation finely regulated
combination of delicate grinding and inertial separation directly in the grinding zone, which allows to obtain a product with
by controlling the rotor speed and the amount of blown
homogeneous fractional composition.
air. You can configure the equipment so that the particles
For example, during the processing of multilayer waste consisting of the layers of different materials (Tetra Pak, Elopak and etc., consisting of cardboard, polyethylene and aluminum layers) it can be gotten single fibers of cardboard (they are selected radially) and polyaluminium/ polyethylene flakes (they are carried away tangentially).
Raw everyday waste Multilayer packaging
Polyethylene flakes
of a material having specified parameters, tangentially carried away from the grinding zone to the bin at the
1. A combination of technological processes —
2. Constant conditions of an «ideal drying process».
drying and grinding delicate drying and drinding – as a result of a combination of drying, grinding and inertial separation at the same Dispergator working area.
The speed of drying agent is 25-28 meters per second relative to the material particles, located in an air-fluidized bed. Approximate consumption of heat energy is 750-800 kW per 1 tonne of moisture evaporation.
3. Inertial separation — from
the drying-grinding area the material particles are separated of necessary size and moisture.
bottom of the equipment and other material particles having different parameters were selected radially.
GRINDING
3
Simultaneous drying and grinding processes
Cellulose fibers
Disintegration of fibrous material to single fibers
The combination of drying and grinding with inertial separation allows to grind materials with initial humidity to 60% by weight. Impingement attack of rotor blades to material and multiple material particles collisions in dense velocity layer allow to grind coarse material particles efficiently. Rotor rotational velocity, depending on its model, is 2000 turns per
4. The safety of the drying process — low temperature
of a heat carrier plus equipment work «under vacuum» increase equipment fire safety and explosion safety dramatically.
5. Getting powders — effective getting dry powders of less than 100 mkm and moisture less than 1%.
Одновременная сушка 6. Compactness — и измельчение Dimensions of grinding and drying unit are 2000x1600x1600 mm.
minute. During grinding process simultaneous drying is executed, it doesn’t allow material to stick to operating apparatus surface.
For example, it’s possible to use dry desintegration (grinding) of fibrous materials into the single fibers such as: waste paper, annuals, nonwoven materials, etc. So, as a result of fine equipment adjustment it is possible to get powders of a particles size less than 100 micrometers. Wood chips
Wood flour
DRYING
4
EXAMPLES
Drying of heat sensitive materials at low temperatures of desiccant agent
Drying process in aerodynamic dispergator also increases owing to intensive friction and collision of particles with each other in dense velocity (fluidizated) layer by motion with high circumferential velocity in aerodynamic dispergator. Material drying in aerodynamic dispergator is assured by intensive air-mass exchange, which is the result of technical solution of this equipment. Material particles form fluidizated bed at the outer radius of horn rotation, through it desiccant
Waste recycling tires (mixture of fiber+ rubber crumb)
Tetra Pak, raw material
agent is blown – air. Airflow, which assures material drying, is 30.000 cubic meter/hour, flow rate is 25-26 metres/second relative to material particles, which are in fluidizated bed.
Feather
Sapropel, raw material
For example, our equipment can Polyaluminium flakes
execute an effective drying of
Rubber crumb
such materials as: technological sludge (waste pulp), hydrolytic lignin (initial moisture is up to 70%, particle size is 1000-50 m.), peat and sapropel (initial
Fibers
moisture is up to 70%), spent
Worked over feather
Dry sapropel
Fibers
grain (initial humidity is up to
SPECIFICATION AND PROCESS-DEPENDENT PARAMETERS
70%), sawdust. Spent grain, moisture 72%
Spent grain, moisture 13%
Series
D DE
DR
Initial hydrolytic lignin
Dry hydrolytic lignin
Model
Installed capacity of electric motors, kW
Overall dimension, mm Dispergator
Dispergator+highpressure fan
Finished product efficiency, humidity, 8-10%
1 000
120
1640х1750х1650
4883х4075х5000
To 1000 kg/hr
500
120
1640х1750х1650
4883х4075х5000
To 500 kg/hr
1 000
240
2770х2300х1650
6280х2770х5000
Tо 1000 kg/hr
1 000
150
1640х1750х1650
4883х4075х5000
To 1000 kg/hr
2 000
300
2770х2300х1650
6280х2770х5000
To 2000 kg/hr
5 000
444
1900х2220х4000
2000х7580х5700
To 5000 kg/hr
* The above specifications are for the review of certain equipment features . The results depend on the characteristics of the processed material, and these values are approximate.
Heat energy consumption
750-800kW/h (0,64-0,68 gcal) to 1 t moisture evaporation
RUSSIAN OFFICE: 103, Marshal Rybalko Street, Perm, Russia, 614032 PRODUCTION UNIT: 1, Centralnaya Street, Mysy, Krasnokamsk, Permskiy kray., 617071 e-mail: info@parmatech.ru WWW.PARMATECH.ORG TEL/FAX (CONTACT CENTER): Russia: + 7 342 2 114 110 EU: + 4 312 297 224 USA & Canada: + 1 347 2 893 118