CZ2010115A3 - Apparatus for processing waste expanded polystyrene and process for processing waste expanded polystyrene - Google Patents

Abstract

The waste foam polystyrene treatment device comprises at least one separation wall (1) and at least one pressure separation arm (2) that moves along the separation wall (1). The process for treating waste foam polystyrene, according to which a coarse grit (6) of polluted foamed polystyrene is fed onto the separation wall (1), which crushes with the pressure of the separating arm (2) moving along the separating wall (1) and then separates it. the wall (1), wherein the impurities (8) are trapped in the space in front of the separation wall (1) or on the separation wall (1) itself.

Description

Apparatus for processing waste foam polystyrene and method for processing waste foam polystyrene

Technical field

The invention relates to the treatment of waste, in particular the treatment of waste foam polystyrene.

BACKGROUND OF THE INVENTION

Currently, multiple waste treatment devices such as expanded polystyrene are known.

From the patent CS 206478 there is known a swirling vertical sorter for sorting paper stationery, especially for sorting of polystyrene foam granules, which is provided with a working chamber body, inlet throat and outlet throat. In the lowest part of the sorter there is a cylindrical body of the inlet chamber with a diameter D1, on the periphery of which at the lower part there is a tangentially located inlet throat and inside the cylindrical body of the inlet chamber is concentrically formed cylindrical spacer. The cylindrical body of the inlet chamber is connected concentrically by a ring of the shape of an outer ring D4, on the outer circumference of which is located the first tangential outlet throat. The ring is connected concentrically to the cylindrical body of the working chamber with a diameter D6, whose free end of the lower part protrudes into the ring and whose upper part is provided with a second tangential outlet neck. A collecting tube of diameter D8 extends into the upper part of the cylindrical working chamber and passes into the outlet throat. In this device, the waste polystyrene waste is treated, but it is not a device that treats polystyrene waste as such, but is a device that merely collects it.

DE (1779171) discloses a polystyrene separation device comprising a shaft fitted with a plurality of knives alternating with a plurality of cutting bars along the longitudinal axis of the shaft. The polystyrene waste is fed to the apparatus described above for cutting and crushing and The disadvantage of this device is that it has a very complicated construction which only allows the separation of polystyrene. Due to its complex construction, it cannot be used for cleaning of recycled polystyrene waste, among other things because it cannot be effectively cleaned, this device can only be used for coarse crushing of polystyrene waste and is not intended for disposal For example, PET bottles that waste may contain will merely cut the machine into small parts that will remain part of the recycled material produced by the machine. However, such a material cannot be used for further production of polystyrene articles without further processing.

Another patent document KF969616585 discloses a process for recycling contaminated polystyrene mass according to which recycled polystyrene is crushed to a certain size of individual parts and subsequently parts of scrap metal are removed by magnetic means. The disadvantage of this method is that it is not able to remove the conventional contamination of the polystyrene with other plastic materials, such as the remnants of adhesive tapes and plastic bags protecting the articles being transported.

A number of drawbacks of the prior art are evident from the aforementioned prior art, the most notable being the impossibility of producing recycled expanded polystyrene in the size of individual beads. It is clear that the mechanical separation of foam and other plastics has not been solved so far.

It is an object of the present invention to provide a waste foam polystyrene treatment apparatus capable of producing recycled polystyrene with a low content of dirt and grain size up to several pearls, capable of separating coarse impurities from recycled expanded polystyrene, which is suitable for further use in molding .

SUMMARY OF THE INVENTION

To a large extent, these disadvantages are overcome and the object of the invention is achieved by a waste foam polystyrene treatment apparatus according to the invention, which comprises at least one separation wall and at least one pressing separation arm which moves along the separation wall.

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Preferably, the separation wall is formed of a perforated sheet or screen having a mesh size slightly greater than the size of the polystyrene beads of the treated polystyrene waste.

The separation wall is preferably cylindrical or conical. In another preferred embodiment, the separation wall is planar. In this case, the separation wall usually forms the bottom or the bottom of the separation vessel.

The separation wall typically forms a separation vessel wall, which is most preferably cylindrical or conical.

In the most preferred embodiment, the pressing separation arm is arranged on the shaft. On the shaft, the pressure separation arm is arranged either directly or by means of ribs.

In the case where the separation wall is cylindrical or conical, the pressing separation arm is most preferably arranged along the separation wall so that it is simultaneously arranged parallel to the shaft axis.

In the case where the separation wall is planar, the pressing separation arm is most preferably arranged along the separation wall so that it is simultaneously arranged perpendicular to the axis of the shaft.

The above-mentioned deficiencies are largely eliminated and the object of the invention is further achieved by a process for treating waste foam polystyrene, in particular a process for processing waste foam polystyrene carried out on the above-described apparatus according to the invention. which is crushed by the pressure of the pressing separation arm moving along the separation wall and subsequently pushed through the separation wall, the impurities being trapped in the space in front of the separation wall or on the separation wall itself.

Since the design of the separation vessel is relatively simple compared to the prior art, it is possible for its surface to include an opening through which the dirt is removed.

The device according to the invention is very simple in construction and therefore inexpensive to manufacture. The parts that pass through the separation wall have a minimum of impurities formed by other materials such as adhesive tapes, paper, tough PS, PET, PE etc. The pure expanded polystyrene pulp is then mixed with a new unused material and used to make blocks or molded parts. moldings. This allows ‘4 recycling of the polystyrene mass, after which it can be used to a much greater extent than before for the new production of polystyrene products.

Thus, the waste foam polystyrene treatment apparatus and the waste foam polystyrene treatment method according to the invention thus make it possible to create a closed system for the production, treatment and recycling of polystyrene, significantly reducing the amount of unusable material and thereby reducing the environmental burden. This means that polystyrene is becoming an environmentally neutral material.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side schematic and front view of a waste foam polystyrene treatment apparatus with a cylindrical separation wall, and FIG. 2 shows a side schematic sectional view of a waste foam polystyrene treatment apparatus with a plane separation wall; .

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The apparatus for processing waste foam polystyrene (FIG. 1) comprises one shaped cylindrical separation wall χ which forms the cylindrical part of the separation vessel 4. The apparatus further comprises a pair of pressing separation arms 2 which move along the separation wall 1.

The separating wall 1 is made of perforated sheet or sieve.

The pressure separation arms 2 are arranged by ribs 9 on the shaft 3. The pressure separation arms 2 are arranged along the separation wall 1, and parallel to the axis 5 of the shaft 3.

Process for processing waste foam polystyrene, according to which first the coarse grit 6 of the contaminated foam polystyrene is fed to the separation wall 1 of the separation vessel 4 from the hopper 11. Further, the pressure of the pressing separation arms 2 moving along the separation wall 1 crumbles the coarse pulp 6 of the polluted foamed polystyrene and subsequently forces the shredded foam polystyrene 7 through the separation wall 1 into the exit space 12, the impurities 8 being trapped in the space. before the separation wall 1 or on the separation wall 1 itself.

Example 2

The apparatus for processing waste foam polystyrene (FIG. 2) comprises one planar separation wall 1 which forms the bottom 10 of the separation vessel 4. The apparatus further comprises one pressing separation arm 2 that moves along the separation wall 1.

The separating wall 1 is formed of a perforated sheet or screen.

The pressure separation arm 2 is arranged on the shaft 3. The pressure separation arm 2 is arranged perpendicular to the axis 5 of the shaft 3.

Process for processing waste foam polystyrene, according to which first the coarse grit 6 of the contaminated foam polystyrene is fed to the separation wall 1 of the separation vessel 4 from the hopper 11. Further, the pressure of the pressing separation arm 2, which moves along the separation wall 1, crumbles the coarse pulp 6 of the polluted foamed polystyrene and subsequently forcibly shreds the crushed foamed polystyrene 7 through the separation wall 1 into the outlet space 12, before the separation wall 1 or on the separation wall 1 itself.

Industrial applicability

The apparatus for processing waste foam polystyrene and the method for processing waste foam polystyrene according to the invention can be used for recycling foam materials, in particular for recycling waste polystyrene.

Claims (9)

Patent claims Apparatus for processing waste foam polystyrene, characterized in that it comprises at least one separation wall (1) and at least one pressing separation arm (2) which moves along the separation wall (1). Device for processing waste foam polystyrene according to claim 1, characterized in that the separation wall (1) is made of perforated sheet or sieve. Device for processing waste foam polystyrene according to one of the preceding claims, characterized in that the separation wall (1) is shaped. Device for processing waste foam polystyrene according to one of claims 1 or 2, characterized in that the separation wall (1) is planar. Device for processing waste foam polystyrene according to one of the preceding claims, characterized in that the pressing separation arm (2) is arranged on the shaft (3). Device for processing waste foam polystyrene according to claim 5, characterized in that the pressing separation arm (2) is arranged parallel to the axis (5) of the shaft (3). Device for processing waste foam polystyrene according to claim 5, characterized in that the pressing separation arm (2) is arranged perpendicular to the axis (5) of the shaft (3). Device for processing waste foam polystyrene according to one of the preceding claims, characterized in that it consists of a separating vessel (4) which is cylindrical or conical. Method for processing waste foam polystyrene, in particular a method for processing waste foam polystyrene carried out on a device according to any one of claims 1 to 8, characterized in that a coarse grit (6) of contaminated foamed polystyrene is applied to the separation wall (1). The pressure separating arm (2) moving along the separating wall (1) is crumbled and subsequently pushed through the separating wall (1), 7 ', the impurities (8) being trapped in the space in front of the separating wall (1) or on the separating wall (1). ) alone.