Method for production of foam polystyrene granules, process line for method realisation and stabilisation unit used in this line

IPC classes for russian patent Method for production of foam polystyrene granules, process line for method realisation and stabilisation unit used in this line (RU 2351470):

C08J9/16 - Making expandable particles

B29B9/16 - Auxiliary treatment of granules

B29B13 - Conditioning or physical treatment of the material to be shaped (chemical aspects C08J0003000000)

Another patents in same IPC classes:

Compositions based on foamable vinylaromatic polymers with improved foaming ability / 2307844

Invention provides a process for continuous in-bulk production of foamable vinylaromatic polymers, which comprises following steps: (i) charging into extruder vinylaromatic polymer jointly with (a) copolymer obtained via polymerization of one or more vinylaromatic monomers and 0.1-15 wt% α-alkylstyrene, and 0-10 wt% (b) compatible polymer having crystallinity below 10% and vitrification temperature (Tg) above 100°C, provided that at least one of (a) and (b) is present in reaction mixture; (ii) heating polymers to temperature superior to relative melting temperature; (iii) adding foaming agent to molten product before extrusion; and (iv) molding, through extrusion head, optionally foamable essentially spherical granules having average diameter within a range of 0.2 to 2 mm. There are also provided foamable vinylaromatic polymers with improved foamability and additionally including 0.05 to 29% of athermic and refracting materials as well as application of foamed products having density between 5 and 50 g/L.

Process of producing foamed vinylaromatic polymers / 2299895

Process comprises: polymerization in aqueous suspension of at least one vinylaromatic monomer in presence of suspending agent selected from phosphoric acid salts; discharging foamed granules from reaction vessel; washing thus obtained granules with aqueous solution containing 0.005-2% by weight nonionic surfactant; separating washed granules, whose surface contains no inorganic phosphoric acid salts; and drying these granules in air flow.

Method of preliminary foaming of the granules of polystyrene and the device for its realization / 2293654

The invention is pertaining to the methods of production of the granulated expanded polystyrene from the granules of polystyrene containing isopentane or pentane, which is used as the filler for the concretes and also for the monolithic and prefabricated heat insulation of the buildings and structures with application of cement. The method of foaming provides, that the granule of polystyrene are exposed to treatment with the seam at the temperature of 95-105°С at continuous stirring action. At that the granule of polystyrene are treated with superplasticizers for the mortar and the concrete having concentration of 20-40 % in quantity of 0.3-0.4 % of the mass of the polystyrene in the air-steam medium at the pressure of 0.35-0.4 MPa. The device for realization of the method contains: the control system; the loading tank for the source granules of the polystyrene connected with the foaming assembly, which includes the paddle mixer and the assembly of the steam feeding in. The outlet of the foaming assembly through the gear of the granules unloading and through the pneumatic pipe duct with the adjustable shutters is connected to air-separators of the hoppers for ageing of the granules. The hoppers include the means for their unloading connected through the unloading pneumatic pipe duct having the controlled shutter, which is connected to the air-separator of the loading tank. The loading tank and the hoppers for ageing of the granules are supplied with the vertical material pipe duct with inlet and outlet holes arranged accordingly on the upper and the lower controlled levels, in the lower part of which there is the sensor of control over the availability of the material. The device is supplied with the tools for treatment of the granules with the liquid superplasticizers for the concrete and the mortar, which are mounted flush with the spin axis of the worm feeder and perpendicularly to it and containing the tank with the sensor unit of availability of the material. The tank is connected to the spray assembly by means of the plug valve regulating the superplasticizer feeding by the pneumatic cylinder connected with the air collector through the pneumatic distributor. The assembly of the steam feeding in contains four perforated disks-sprayers, the total of the diameters of which is equal to the radius of the bottom of the foaming assembly and which are arranged according to the coordinates: the first disk - [0, r], the second disk - [3r, 0], the third disk - [-5r, 0], the fourth disk - [0,-7r] in the bottom of the foaming assembly, where r is the radius of the disks-sprayers of the steam. There also is the perforated grate in the form of the lattice with a mesh size of 0.14 mm mounted over the bottom along the whole area at the altitude equal to (0.05-0.1) from the height H of the working chamber of the foaming assembly, and the tubular shaft of the paddle mixer of the foaming assembly, which is made sealed above and connected with tubular vanes sealed on the ends and perforated from below. The invention ensures reduction of the granules density and the duration of the superlight expanded polystyrene production process, as well as the specific power inputs.

Foamed vinylaromatic polymers and a process for producing the same / 2283323

Foamed vinylaromatic polymers are prepared using inorganic filler having essentially spherical granulation with average diameter within a range of 0.01 to 100 μm, refractory index exceeding 1.6, and whiteness index equal to or below 22 as measured according to "Color Index". Foamed vinylaromatic polymer include (i) matrix obtained by polymerization of 50-100% of one or more vinylaromatic monomers with 0-50% of copolymerizable monomer; (ii) 1-10% (based in polymer mass) of foaming agent incorporated in polymer matrix; and (iii) 0.05-25% of above-mentioned filler. Foamed vinylaromatic polymers are characterized by density from 5 to 50 g/L and heat conductivity 25 to 50 mv/m-K. A method of preparing foamed vinylaromatic polymers involving polymerization in water suspension of one or more vinylaromatic monomers, optionally in common with at least one polymerizable comonomer, in presence of inorganic filler is also described as well as continuous foamed polymer production process.

Method of preparing open-cell foamed material / 2271372

Invention relates to foamed material constituted by cross-linked amino-formaldehyde polymer product suitable for filtration of tobacco smoke. Foamed material according to invention contains cavities and intermediate spaces located outside of cavities, said spaces being confined by walls consisted of cross-linked amino-formaldehyde polymer product optionally supplemented by additives. Average space dimension lies within 30 to 350 μm. Considerable portion of spaces have two or more perforations with average diameter within a range of 5 to 300 μm in their walls while considerable portion of perforations of neighbor spaces are arranged relative to each other in such a way as to form continuous nonlinear path. Foamed material is characterized by porosity at least 45 vol % and specific surface area 0.1 to 15 m²/g. Method of preparing of such foamed material comprises following stages: mixing air and foaming agent solution under pressure in mixing zone of injector filled with multiple inert mixing members; passing, under pressure, non-hardened foam from mixing zone and prepolymer solution into reaction zone of injector to form curable foam; and discharging foam and drying it in air. Use of such foamed mixture as cigarette filter allows content of toxic compounds such as resins and polycyclic aromatic compounds to be lowered.

Method of preparing polymer materials with specified porosity via treatment with carbon dioxide in supercritical state followed by heat treatment at atmospheric pressure / 2266305

Method is comprised in saturating polymer material sample, placed in high-pressure cell, with carbon dioxide under supercritical conditions at pressure 250 atm and temperature 40-120°C, cooling the cell to room temperature and slowly lowering pressure to its atmospheric value. Foaming of polymer sample saturated with carbon dioxide under supercritical conditions proceeds during 60 min of further heat treatment at atmospheric pressure. Final porosity of polymer sample is determined by heat treatment temperature.

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The method of obtaining medicinal healing sponges / 2104008

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Absorbent porous polymeric macrostructure, absorbent and method for producing porous absorbent polymer macrostructure / 2099093

Absorbent polymer composition / 2091081

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Post-processing of polymeric granules / 2340634

Method involves the supply of a stream of water with poly-olefin granules in a column, cooling the poly-olefin granules in the process of their flow up the column counter-flow downward flowing cooling water with the speed of between 0.5 to 4 cm/sec and collecting cooled granules from the upper part of the column. The cooling water has a density higher than the density of the specified poly-olefin; in this case the speed of the cooling water is kept constant. Collecting of the granules is carried out after they have been in the column from 2 to 20 minutes.

Thermoplastic resin covering composition for particles designed for forming styrofoam containers / 2328510

Invention relates to the thermoplastic resin particles designed for forming the Styrofoam containers. The foaming thermoplastic resin particles are described, consisting of polymer obtained from the vinyl aromatic monomers, and bearing on their surface the covering composition at approximately 0.005 to 2.0 mass percent at particle mass. At that, the said covering composition includes the components selected from the group consisting of 1) liquid part and 2) solid part; and the said liquid part contains: a) from approximately 0.01 to 0.8 mass percents at a particles mass of polyethylene glycol with the apparent molecular weight from approximately 200 to 800; the said solid part contains the components selected from the group consisting of b) from approximately 0.01 to 1.0 mass percent at a mass of the polyolefin wax particles; c) from approximately 0.01 to 0.6 mass percent at a mass of the particles of the metal-containing salt of the higher fatty acids; d) from approximately 0.01 to 0.8 mass percents at a particles mass of polyethylene glycol with the apparent molecular weight from approximately 900 to 10000; and e) from approximately 0.01 to 0.1 mass percent at a mass of the fatty bisamide particles; and their combinations. Also, the styrofoam container and the formed article produced from the said foaming particles, are described. The covering composition for the said particles and the method for improvement the leakage resistance in the styrofoam container, are described.

Method of preliminary foaming of the granules of polystyrene and the device for its realization / 2293654

Device for continuous dry heaves of polystyrene granules / 2160184

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Post-processing of polymeric granules / 2340634

Method and device for making sacks with spouts / 2337821

Method involves welding the tube element of spout, containing thermoplastic resin, to sack, containing relatively soft flexible film. Preliminary heating of the tube element of the spout is carried out, while rotating it about the axis of its cylinder. The heated element of the spout is then fitted into the open part of the sack, squeezed and the spout element is welded to the open part of the sack. The device has a means of rotating the spout element, a feeding device for the spout element, and a preliminary heating device for rotating the spout element. The device also has a welding device for fitting the heated spout element into the open part of the sack and its compression, and a coolant for the sack, welded to the spout element. There is also an extraction device for extraction of a cooled sack with a spout element.

Method of production of highly dispersed material for manufacture of dampproof, antinoise and sport surfaces / 2333098

Method includes processing of rubber crumb with thermoplastics in device of rotor type for high temperature shear grinding during heating by means of simultaneous exposure of processed material to pressure and shear stress. At that processing is carried out in two stages. At the first stage rubber crumb or mixture of rubber crumb and one thermoplastic with ratio of rubber crumb: thermoplastic or mixture of thermoplastics, equal to, weight % (99.5-90.0):(0.5-10.0), are processed under conditions that provide high temperature shear grinding of rubber crumb. At the second stage processing of product produced at the first stage is carried out in the presence of thermoplastic or mixture of thermoplastics with the following ratio - product produced at the first stage: thermoplastic or mixture of thermoplastics, equal to, weight % (2-90):(98-10). At that processing is carried out under conditions that provide high temperature shear grinding of thermoplastic or mixture of thermoplastics.

Device for powder preparation from polymer material / 2329893

Invention is related to the field of materials grinding, namely to devices for preparation of dispersed polymer material and may be used for grinding natural and synthetic polymer materials. Device for powder preparation from polymer material includes tightening chamber and grinding chamber in the form of cylindrical casings with loading and discharging openings. Inside the tightening chamber tightening auger is installed with spiral grooves on the surface. Depth of grooves is made as gradually reducing to the discharging opening. Tightening chamber casing is installed perpendicularly to the grinding chamber casing and is hermetically connected with its discharging opening to its inlet opening that is installed in the middle part of grinding chamber. In grinding chamber two milling rotors are installed, which are made with the possibility of ground polymer material movement from grinding chamber inlet opening to its discharging nozzles. Nozzles are installed in the opposite ends of grinding chamber. Between milling rotors tightening augers are installed coaxially with spiral grooves on their surfaces. Grinding chamber is equipped with cooling facilities.

Device for powder preparation from polymer material / 2329892

Invention is related to the field of materials grinding, namely to devices for preparation of dispersed polymer material and may be used for grinding natural and synthetic polymer materials. Device for powder preparation includes tightening chamber and grinding chamber in the form of cylindrical casings with loading and discharging openings. Inside the tightening chamber tightening auger is installed with spiral grooves on the surface, the depth of which is made as gradually reducing to the discharging opening. In grinding chamber that is equipped with cooling facilities milling rotor is installed with creation of annular gap in respect to internal surface of the casing. Tightening chamber casing is installed perpendicularly to the grinding chamber casing and is hermetically connected with its discharging opening to its inlet opening that is installed in the middle part of grinding chamber. Grinding chamber has two discharging nozzles installed in the opposite ends of its casing. On the side surface of milling rotor spiral grooves are made, which are cut from rotor centre to its ends in the opposite direction. Milling rotor may be made with annular deepening that is installed in its central part in the zone of grinding material supply from tightening chamber.

Device for preparation of the polymeric material for reprocessing / 2310561

The invention is pertaining to the device used for preparation of the polymeric material for reprocessing. The device contains the tank with the upper charging opening for the material. In the tank around its vertical axis there is at least one rotating mixing and-or grinding gear. This gear routes the treated material to the located in the lower part of the tank discharge opening, to which at least one body of the feed screw adjoins. The lateral wall of the feeding opening, along which the gear moves down, limits the dilation passing continuously in direction to the axis of the feed screw. The device is supplied with at least one additional feed screw. At that the dilation extends, if to look in the direction of the axis of the body of two or more feed screws, along the part of the periphery of the turns of the neighboring feed screw, predominantly up to the area of the feed screw axis, so that the edge of this dilation on the side of the feed screw forms the continuous cutting edge interacting with the turns of the feed screw. The device allows to attain the more uniform feeding of the subjected the reprocessing material into the feeding opening of the feed screw body and to produce the more uniform outlet at the discharge end of the feed screw.

Device used for preparation ot the polymeric material for the recycling / 2310560

The invention is pertaining to the device for preparation of the polymeric material, predominantly thermoplastic, to its recycling. The device contains the tank, in which there is at least one gyrating mixing and-or mincing tool. At that the treated material is routed to the disposed in the tank bottom discharge outlet, with which the body feeding inlet is streamwise connected. The device contains at least two feed screws fed together. The invention also presents the dependence between the diameters of the tank and the diameters of each of the feed screws with usage of the constant value, which exceeds or is equal to 50. The technical result of the invention is the possibility providing the more uniform feeding of the material subjected to the recycling into the device adjoining to the discharge outlet, and the uniform outlet of the agglomerate on the discharge end of the feed screw. The design pertaining to the geometry of the feed screws is less sensitive to reprocessing of the various polymers.

FIELD: technological processes.

SUBSTANCE: present invention is related to devices and methods intended for production of foam polystyrene in the form of granules. Method is described for production of foam polystyrene granules, which includes supply of foaming polystyrene granulated material into chamber of foaming device provided with blade mechanism, production of foam polystyrene granules by means of granulated material foaming in steam-air medium, temperature reduction and drying of granules directly after foaming in process of continuous mixing, pneumatic transportation of granules to stabilisation unit, aeration of granules in it in movable air medium, and the method differs by the fact that initial raw materials used is granulated material of self-extinguishing foaming polystyrene, which is powdered with antistatic substance prior to foaming, after foaming steam supply to chamber of foaming device is isolated, and granules are dried in it with simultaneous mixing by blade mechanism, with further cooling in intermediate reservoir, and in stabilisation unit granules are aerated in turbulent medium of heated air at the temperature that is not higher than temperature of hot plastic deformation of granules. Process line is also described as well as stabilisation unit for production of foam polystyrene granules.

EFFECT: method and process line simplification at high efficiency and production of foam polystyrene granules with preset properties suitable for filling of orthopaedic products.

4 cl, 1 dwg

Group of inventions relates to devices and methods, intended for the production of foamed polystyrene in the form of granules, and can be used to produce pellets, used as filler in the manufacture of orthopedic products.

To use granules of foamed polystyrene (hereinafter granules EPS) for the purposes stated above are subject to more stringent requirements for strength, elasticity and stringent requirements on the residual styrene content in the foamed granules in accordance with the sanitary and hygienic norms. Strength indicators are linked to the density of the granules. The work performed has shown that granules EPS, intended for filling orthopedic products, should have a bulk density of not less than 30 kg/m³. The modulus of elasticity should be about 7.6 to 10.7 MPa DIN 53457, and the size of the granules should be 5-7 mm in diameter. A task group of the invention is to provide a method for producing granules of foamed polystyrene, suitable for filling orthopedic products, and device implementing the method.

As raw material for pellet production UPU use granular polystyrene foam self-extinguishing, which is a product of suspension polymerization of styrene in the presence of a blowing agent. Polystyrene at room temperature not about what it shows harmful effects on humans, non-toxic, non-explosive, thanks to special additives (flame retardants) fades out after removal of the flame source. Particles of raw materials contain evenly distributed parabrachial (foaming agent) and the residual monomer is styrene. The basis of all methods of processing of the granulate self-extinguishing expanded polystyrene is the process of heating and foaming of the polymer with increasing particle dozens of times. During the foaming process in the polymer occurs in the vapor phase foaming agent contained in the particles, with the formation of pores. Further, the growth of pores and stabilization of the cellular structure of the granules EPS. The basis of each particle of the granular polymer is closed microequity structure in which cells are filled with air and blowing agent. During the foaming process the increased volume of the particles of the granules is achieved by evaporation of the blowing agent, the subsequent expansion of the granules is due to the penetration into the cell pellets coolant. The penetration of fluid into the cell, despite a slight excess pressure, is substantially faster than the volatilization of vapors blowing agent from the cells. Foaming can be carried out in hot water, using steam, hot air and other fluids. Typically, t is mperature foaming is 95-110°C. The most economical and convenient is foaming in steam-air mixture. Steam accumulates a large quantity of heat, has a high heat transfer coefficient. In addition, the steam helps to further expansion of the cells, as has the ability to penetrate the cell pellet. Directly after foaming granules EPS mechanically unstable and easily deformed under loads, as the remaining foaming agent and infiltrated them in water vapor condenses, giving the cells a reduced pressure, and the structure of the cells is not yet otverdel. In the process of stabilization of the granules to hardening of the structure of cells and the penetration of air into granules, gradual volatilization of the blowing agent. In order foamed polystyrene granules were suitable for the filling of orthopedic products, the process of stabilization must be sufficiently long-lasting and effective for obtaining high physical-mechanical parameters and complete removal of the pore-forming and residual monomer from the expanded granules. As shown in the work done, the stabilization time of the expanded granules to achieve the necessary qualities in known devices of stabilization is several days, which is a big disadvantage of the process.

The known method (Japan patent JP 6084453 B4, publ. 14.8.1987) obtain pellets of the UPU, namely, in the apparatus, the blowing agent download a certain number of granules of polystyrene, which is pre-heated by hot air with a temperature of 80-120°C, the device-expander seal, lower pressure and continuously served him water vapor. Then, while maintaining the pressure inside the apparatus, the blowing agent above atmospheric, produce heat conducting preliminary foaming particles to a certain degree of foaming, the pressure inside the apparatus is dramatically reduced below atmospheric, in the apparatus again served hot air to increase the pressure in the apparatus, the blowing agent and incubated for a certain time, passing air through the foam particles with a high speed. After foaming, the flow of hot air is stopped, the pressure inside the apparatus of the expander discharge to atmospheric and foamed particles being unloaded. The method has a high complexity of the process and equipment, as the process contains technologically complex operations, and equipment includes vessels working under pressure.

The closest in technical essence and the achieved result of the claimed method is a method of producing granules UPU A.S. USSR № 1458244, including the supply of granules of expandable polystyrene in the chamber of the expander, equipped with a paddle-fur the mechanism, simultaneous steam in the chamber of the expander from the steam generator to obtain granules EPS by heating and foaming granules in a vapor environment, unloading pellets in the drying chamber, where the dried granules in a hot air environment with continuous stirring blade mechanism, transportation pellet pneumatic device in bunker stabilization device granules, where the stabilization of the granules in the ascending air currents generated by the aeration devices made in the form of tubes with narrow slits and located in the lower part of the bunker.

Closest to the technical essence and the achieved result of the claimed process line for producing granules EPS for filling orthopedic products is a production line, as the USSR № 1458244 to obtain pellets of the UPU, including the set-foaming agents, equipped with loading capacity feeder, screw feeder raw material and unloading pellets, steam generator, connected to the chamber for foaming. Apparatus, the blowing agent contains a chamber for foaming and two additional cameras: camera drying granules with hot air and the camera preliminary stabilization of pellets heated air. These cameras are equipped with paddle mechanisms each. Technological line with the also contains a pneumatic system for transporting material to the site to stabilize the pellet weight, including at least one tank, the aeration device inside the hopper and means of ventilation and exhaust in the area of the production line.

In a process line for producing granules on the above, as of the USSR № 1458244 directly after foaming produce Peresypkina granules from the camera apparatus of the expander into another chamber, where the dried granules in a hot air environment with continuous stirring blade mechanism, and then produce Peresypkina granules in the third chamber, where it is dried granules in a hot air environment with continuous stirring blade mechanism. Thus, the disadvantage of the process line is its complexity: in addition to the camera apparatus of the blowing agent with the blade mechanism in the production line for the prototype needs two additional cameras, paddle mechanisms each. The disadvantage of this method is its complexity: the operations of the discharge of granules and mixing the granules after the foaming vane mechanisms, first in one, and after one discharge to another camera. In addition, lack of method and process line is the inevitability of mechanical damage granules vane mechanisms, as granules directly after foaming mechanically unstable. Stabilization time foam granulated long, up to several days, however, the indicators necessary for granules of foamed polystyrene filling orthopedic products, do not get, which is a disadvantage of the method and production line.

Known bunker device (RF Patent for useful model No. 32474) for the collection and temporary storage of bulk materials, comprising a housing with loading and unloading hatches, including inside the housing on the perimeter and the height of the air-permeable tubes connected via a valve to a source of compressed air and a source of cold air connected to the air-permeable tubes in parallel to a source of compressed air. The disadvantage of this device is the complexity of the system breathable pipes.

The closest in technical essence and the achieved result is a site stabilization of the expanded granules specified as the USSR № 1458244. The node comprises a hopper having a breathable fabric cover, mounted in a grounded metal frame, air inlet for loading pellets, an outlet for discharging granules, the aeration device made in the form of tubes with slots arranged horizontally inside the bunker in the lower part thereof, means for creating an air curtain along the outer side surface of the casing, aerodynamically-related devices hood. In this node for which stijene requirements for stabilization of granules of foamed polystyrene, suitable for filling orthopedic products (high mechanical strength, elasticity and residual content of blowing agent and monomer in accordance with the sanitary and hygienic norms) the stabilization process should be very long. As studies have shown, the stabilization time in such a device to achieve the necessary qualities of granules of foamed polystyrene, which make them suitable for filling orthopedic products, is a few days.

The technical result of the invention is a method of producing granules EPS for filling orthopedic products and production lines for its implementation - is a simplification of the method and process lines with high efficiency and obtaining granules of polystyrene EPS with the desired properties suitable for filling orthopedic products, namely small polymer with improved physical and mechanical properties (density, elasticity) and low residual content of blowing agent and residual monomer (styrene), relevant health regulations, reduction of terms of stabilization of granules of foamed polystyrene.

The technical result of the invention - site stabilization is a simplification of the device, reduction of terms of stabilization of the granules and improve the quality Gran is l physical-mechanical properties and sanitary-hygienic requirements.

The technical result in the method of producing granules EPS, including the supply of granules of expandable polystyrene in the chamber of the expander, is equipped with a blade mechanism, obtaining granules of foamed polystyrene by foaming granules in a vapor environment, the reduction temperature and the drying of the granules directly after foaming, with continuous stirring, the pneumatic transportation of granules in site stabilization, aeration therein granules in the moving air, according to the invention is achieved by the fact that the quality of raw materials used granular polystyrene foam self-extinguishing, which before foaming optivault antistatic agent, after foaming, shutting off the supply of steam to the chamber of the expander and dried granules in it while stirring blade mechanism, site stabilization exercise aeration granules in the turbulent environment of heated air at a temperature not higher than the temperature of hot plastic deformation of the granules.

To reduce the electrified granules EPS, screw mechanism do the dusting granulate antistatic agent.

The technical result of the invention is a process line for producing granules EPS - is achieved in that in a process line, comprising a blade is part-blowing agent to obtain pellets of foamed polystyrene, equipped with loading capacity feeder, screw feeder of raw materials and equipment for discharging granules from the apparatus-expander, steam generator, connected to the chamber for aeration, pneumatic conveying of granules at the site to stabilize the mass of granules of foamed polystyrene, comprising at least one bin with aeration device within the hopper, means of ventilation and exhaust in the area of the production line, according to the invention apparatus, the blowing agent is made of single-chamber, to him through the unloading pellets connected intermediate tank for accumulation and cooling of the granules of the apparatus of the expander, and the aeration device inside the hopper is made in the form of a device turbulence of the air flow and the mass of granules.

The technical result of the invention - site stabilization of granules EPS - is achieved by the fact that the node comprising at least one hopper having a breathable cover, mounted in a grounded metal frame, means for feeding and unloading pellets, the aeration device inside the tank and the device for creating an air curtain along the outer surface of the housing with the device of the drawing, according to the invention the device for the aeration of the inside of the hopper is made in the form of the device of turbulence of the air flow the mass of granules.

To improve the efficiency of the stabilization device of turbulence in flows inside the hopper is made in the form located in the lower part of the pipe connected to the compressor with compressed air and producing element of the pipe is made of soft, breathable material. To enhance the effect of turbulence in the axis of the nozzle is inclined to the vertical axis of the hopper and the outlet pipe is located outside the place of passage of this axis.

Analysis of scientific literature and patent documents showed that each of the claimed inventions of the group is new, inventive combination is unknown. The invention is a method corresponds to inventive step, as for the specialist claimed combination of features of the process should not be explicitly known from the prior art. A new set of operations of the method and conditions of their conduct established by repeated experiments. Among the distinctive features of the process include new features, and known characteristics, which together with other signs provide a new technical result. So, from the description to as. the USSR № 1627415 know the impact of the flow of heated air onto the granules of foamed polystyrene, under the action of which granules are produced spiral motion. But in accordance with the image is the group for A.S. The USSR № 1627415 blade mechanism involves simultaneously the flow of air and the mass of granules mainly in the main thread with the same trajectory, in addition, exposure to hot and then warm air is applied directly after aeration for drying and avoid aging of granules bulk density higher than 20 kg/m³. In the inventive way creating a turbulent environment of heated air and the impact of turbulent flows granules EPS is carried out after the pneumatic transportation device, i.e. after the initial stabilization of the granules. On the stage of stabilization of the granules in the turbulent regime dramatically reduced the time needed for stabilization of granules: practically stabilizes the cellular structure of the granules, there is a saturation of granules of air and the effective removal of residual monomer. The invention is a production line for producing granules EPS and site stabilization granules EPS meet the inventive step, as for the specialist claimed the set of features of the device not obvious from the prior art. Among the distinguishing features there are new features, and known characteristics, which together with other signs provide a new technical result. So, from the description to as. the USSR № 680628 known device turbulization, used in the production of polystyrene granules. However, this device is located in the chamber for foaming and is intended to create an air or other gas medium, is used as a coolant for foaming granules, whereas in the inventive process line for these purposes is the steam generator, from which the camera foaming acts pairs, used as a coolant. Also known bunker for stabilization (Japan patent JP 7148763, IPC 7 WW 13/06) granules EPS containing metal case, in which the active aeration foamed polystyrene particles by mixing, due to the flow of hot air under pressure into the cylindrical device installed vertically or obliquely inside the hopper for maturing granules. The length of the cylindrical device commensurate with the height of the body of the hopper, the flow of hot air captures and drives particles from the bottom up through the cylindrical device, so in the body, in contrast to the claimed invention does not create turbulence throughout the volume of the bunker.

The drawing schematically shows a production line for producing granules EPS. Technological line contains the boot capacity of 1 with the raw material, the dispenser 2, the screw mechanism 3 for smooth supply of raw materials in ka the ERU 4 of the apparatus of the expander. Below the camera is the steam generator 5, which may be implemented as a built-in steam generator, see, for example, http://www.tpribor.ru/photogal.html "Complex foaming of polystyrene granules "Passat-200 PM. Steam is fed into the chamber through holes in the bottom of the camera. The chamber 4 through the device unloading pellets, made in the form of a pipe 6 connected to the tank 7 for the accumulation of granules, then pneumotropica 8 bin 9 node to stabilize the pellets. Pneumatic transportation device includes pneumotropica 8, equipped with a jet pump 10, which is connected to the source 11 of compressed air. The hopper 9 to stabilize the pellets in the lower part has a means of unloading pellets in the form of a pipe 19 and the feeder expanded granules in the upper part of the hopper 9, which may be performed, for example, as shown http://www.prompolistirol.ru/bunkervil.html "the Bunker is established, the enterprise "System mechanic".

Outside of the bunker 9 below its outlet completed device 12 ventilation, which can be located inside the hopper tubes with slots, connected to a blower (not shown). The hopper 9 is also equipped with means of ventilation along the outer side surface is made in the form of ducts 13, having openings, and spaced along the lower perimeter of the hopper and connected to Vodohod is VCE (not shown). Devices 12 and 13 are used for aeration and create an air curtain along the outer surface of the housing and aerodynamically associated with devices hood. Device for ventilation are also located in the area of the device of the expander, the intermediate storage tank 7 (not shown). The device turbulization of the flow inside the hopper is made in the form located in the lower part of the pipe 14 connected to the compressor 16 with compressed air and producing element of the pipe 15 is made of soft, breathable material. Unlike the prototype site stabilization does not contain inside the bunker piping systems aeration, which greatly simplifies the stabilization device.

Site stabilization can be performed in several bins for aging, having adjacent walls. Over the bunkers and machine-expander feature extraction unit 17. If the node stabilization includes two or more bins, unloading pellets in one or another bunker regulate dampers 18.

Implementation of the proposed method and the operation of the inventive device will consider a specific example. For production is used as raw material beads (small granules) polystyrene foam self-extinguishing, which during the processing gives a fine structure. LLC "Paster" as a source of raw materials would be the used self-extinguishing expanded polystyrene EPS Styrochem (brand: NF-114, NF-214, NF-514, NF-714, NF-914, NF-1214) NF-414, manufacturer StyroChem International OY, Finland. Production line for producing granules EPS, which can be used for filling orthopedic products, and site stabilization granules EPS performed, as shown in the drawing. The raw material is poured into the loading capacity of 1, add antistatic substances in the ratio of 1% by weight of the granulate. Dispenser 2 raw screw mechanism 3 is smoothly fed into the chamber 4 of the device-expander, where it is under continuous stirring paddle mechanism foams in vapor environment in the temperature range from 95 to 100°C. evaporation of the blowing agent and the subsequent expansion of the pellets due to penetration into the cell pellets fluid volume of the granules is increased tenfold. Measure foaming is the bulk density of the expanding particles, which is measured in kg/m³. Different grades of polystyrene is produced when the reach a different bulk density. In order to create the necessary working conditions and to monitor the consistency of manufactured products, measure bulk density. Measurement of the bulk density can be produced by hand. A cylindrical vessel with a capacity from 5 to 10 l fill granules EPS and determine the weight and bulk density. Fine adjustment of the bulk density is C is by adjusting the speed of a screw conveyor feeding the material into the container. The foaming process is carried out to obtain a given bulk density and granule size UPU orthopedic products, which in this example was 4-5 minutes. Directly after foaming carry out the drying of the granules EPS hot air. The goal of this stage is to carry out drying of the outer shell granules UPU, to avoid clumping. For this purpose, unlike the prototype, not unload granules EPS from the chamber 4 of the device of the expander, and are dried in hot air at a temperature of about 85°C and above in the following way. In the same chamber of the expander continue mixing granules EPS blade mechanism, but stop the supply of steam from the steam generator, the temperature of the environment in this way is reduced to 85°C. the drying Process in this example was 4-5 minutes, but it may be longer, and the temperature is reduced below. In the drying process is the initial stabilization phase of granules. Can be applied to other drying methods, such as blowing hot air into the chamber of the expander. Immediately after foaming granules EPS mechanically unstable and easily deformed under loads, as the remaining foaming agent and infiltrated them in water vapor condenses, giving the cells a reduced pressure, and the structure of the cells is not yet otverdel. From the chamber 4 of the device-expander spenny the polystyrene granules discharged through the pipe 6 into the intermediate storage capacity 7, where they stand for cooling and drying in a ventilated air at normal temperatures, i.e. at an ambient temperature of 20-25°C, making even one of the initial stages of stabilization of the granules. Granules after this stage of stabilization in the accumulation tank 7 more easily deformable, but their resilience should be sufficient for pneumatic transport pneumotropica 8 in the node to stabilize the granules EPS. The stabilisation process essentially begins in the chamber 4 of the device of the expander while blowing hot air at a temperature of about 85°C and above. In the intermediate storage tank 7 further cooling of the granules EPS and stabilization in a ventilated environment (air) at normal temperature of about 20-25°C. the dwell Time and cooling granules EPS from 0, 5 hours or more. It should be sufficient to granules acquired elasticity sufficient to transport without mechanical damage. Next stage of the process of stabilization of the granules occurs during shipping by pneumotropica 8 by active mixing and pouring the granules and their intensive ventilation (aeration) by the air flow created by a fan or blower. Pneumotropic in this example, with ink-jet pump 10 connected to the source of gathogo air 11. When transporting material pneumotropica 8, in contrast to known devices, in almost no maskoobraznoe removal of granules EPS. The installation transportation run always empty, to prevent clogging. To adjust the boot provides a second adjustable suction hole for air.

In the hopper 9 carry out the stage of stabilization in turbulent environment of heated air at a temperature not higher than the temperature of hot plastic deformation of the granules, and in this example at a temperature of 40-50°C. the Turbulization carried out to obtain a given elasticity of granules EPS. A significant increase of elasticity is achieved within 1 hour of blowing in the turbulent regime. The process of turbulence are in the range of from 1 to 6 hours to obtain a high performance not only elastic, but also by the residual styrene. In the example, it was found that the most optimal to the turbulization within 3-4 hours from the point of view of the optimal combination of set values for the elasticity and performance efficiency of the process. When this occurs, the weathering of residual monomer (styrene) from granules almost to sanitary and hygienic norms, their saturation with air, the alignment of the internal pressure, the final stabilization of the form of granules, curing ball is East of the structure. The final stage of stabilization of the granules, which receive granules, suitable for filling orthopedic products, is a division of the mass of granules and extract each part in a separate air-permeable packaging to given values of the residual monomer (styrene) when convection of the surrounding air. The method differs from the prototype in that there is no Peresypkin granules in an additional chamber for drying, and then another Peresypkin and stabilization of the pellets in the chamber prior to stabilization with blade mechanism. The method provides a more efficient, high quality and short process of aeration in the bunker site stabilization. The timing of aeration reduced several times. Technological line for comparison with the prototype greatly simplified due to the fact that does not contain additional cameras - drying chamber with a flow mechanism and the camera preliminary stabilization, also with a blade mechanism, connected to the apparatus, the blowing agent. Site stabilization differs from the prototype in that does not contain a complex system of tubes for aeration, and aeration device applied a simple and more effective device of turbulence in air flow and mass of granules. Compared with the prototype improved environmental safety of production is renal UPU, because, unlike the prototype, where the aeration device was created weak ascending air flow, in the present method is rapid and efficient removal of residual styrene devices hood due to the fact that in the present method creates a powerful high-speed turbulent flows of air temperature is higher, compared to conventional aeration granules in bunkers stabilization. Turbulent regime in the hopper to create a device that can be accomplished, for example, in the form of a pipe 14 connected to the compressor of the compressed air. The Issuer element 15 of the socket 14 are made of soft, breathable material. The heated air enters the lower part of the hopper stabilization under pressure from a compressed air source 16 (compressor) through the pipe 15. The Issuer element 15 of the nozzle 14 is in a chaotic motion, creating a high degree of turbulence throughout the volume of the hopper without stagnant zones. Due to the collision of turbulent fluxes of mass of granules and air is an active mixing of the granules throughout the volume, which allows the removal of residual styrene is most effective and in a shorter time.

The possibility of achieving these technical results in the way of technological line for receiving the of renal EPS and site stabilization granules EPS confirmed by repeated experiments at LLC "Paster". Production line equipped with the necessary means to ensure sanitary standards for staff; combined with means for creating an air curtain along the outer side surface of the casing, devices, hoods, ventilation system.

Despite the simplification in comparison with the prototype, as in the present method there is no periodicity, the method remains high for the same reason. The production of pellets by the present method can be either continuous or aimed at getting the individual parties.

1. A method of producing granules of foamed polystyrene, including the supply of granules of expandable polystyrene in the chamber of the expander, is equipped with a blade mechanism, obtaining granules of foamed polystyrene by foaming granules in a vapor environment, the reduction temperature and the drying of the granules directly after foaming, with continuous stirring, the pneumatic transportation of granules in site stabilization, aeration therein granules in the moving air, characterized in that the feedstock used granular polystyrene foam self-extinguishing, which before foaming optivault antistatic agent, after foaming, shutting off the supply of steam to the chamber-vspe is ivatele and dried in her granules with simultaneous stirring paddle mechanism with subsequent cooling in an intermediate tank, and site stabilization exercise aeration granules in the turbulent environment of heated air at a temperature not higher than the temperature of hot plastic deformation of the granules.

2. The method according to claim 1, characterized in that the dusting granulate antistatic substance is performed in a screw mechanism.

3. Production line for producing granules of foamed polystyrene, including centrifugal apparatus, the blowing agent to obtain pellets of foamed polystyrene, is equipped with loading capacity feeder, screw feeder of raw materials and equipment for discharging granules from the apparatus-expander, steam generator, connected to the chamber for aeration, pneumatic conveying of granules at the site to stabilize the mass of granules of foamed polystyrene, comprising at least one bin with aeration device within the hopper, means of ventilation and exhaust in the area of the production line, characterized in that the apparatus-expander chamber made to it through the device unloading pellets connected the intermediate tank for accumulation and cooling of the granules of the apparatus of the expander, and the aeration device inside the hopper is made in the form of the device of turbulence in flows of air and the mass of granules.

4. Uz is l stabilization of pellets in a process line for producing granules of foamed polystyrene, including at least one hopper having a breathable cover, mounted in a grounded metal frame, means for feeding and unloading pellets, the aeration device inside the tank and the device for creating an air curtain along the outer surface of the housing with devices hood, characterized in that the device for the aeration of the inside of the hopper is made in the form of the device of turbulence in flows of air and the mass of granules, which has a nozzle located at the bottom of the hopper and connected with the compressor of the compressed air, the axis of the nozzle is inclined to the vertical axis of the hopper and the outlet pipe is located outside the place of passage of this axis, and the nozzle has producing element, made of soft, breathable material.