KR100818756B1 - Recycling Disposal System for Waste Plastic and Recycling Disposal Method for the Same - Google Patents

Abstract

The present invention is to improve the structure and improve the productivity and quality of waste plastics recycled products, to provide a recycling processing system and a recycling treatment method of waste plastics to provide a clean working environment. To this end, the present invention applies a melt extrusion apparatus for melting and extruding waste plastics by using self-driven frictional heat in a recycling processing system of waste plastics, supplying moisture during melt extrusion, and Provided is a recycling processing system and a recycling method for waste plastics mixed with appropriate additives. Therefore, according to the present invention, it is possible to improve the productivity and quality of the recycled products of waste plastics, and to provide a clean working environment for workers.

Waste Plastics, Recycling, Friction Heat, Moisture, Additives

Description

Recycling Disposal System for Waste Plastic and Recycling Disposal Method for the Same}

1 is a block diagram showing a recycling treatment system according to the present invention;

FIG. 2 is a configuration diagram schematically showing a pre- sorting device, a pulverizing device, and a desorption device of FIG. 1;

3 is a configuration diagram schematically showing the PVC sorting device of FIG.

4 is a schematic view showing the additive supply device, the melt extrusion apparatus and the post-factory plant of FIG.

5 is a perspective view showing the main configuration of the melt extruder of FIG.

6 is a flow chart showing a recycling treatment method according to the present invention.

<Explanation of Signs of Major Parts of Drawings>

10: pre sorter 20: grinder

30: degassing apparatus 40: PVC sorting apparatus

50: additive feeder 60: melt extrusion apparatus

70: post-processing device

The present invention relates to a recycling processing system and a recycling processing method of waste plastics, and more particularly, to a waste plastics recycling processing system and recycling that improves the structure to improve productivity and quality of recycled products and provide a clean working environment. It is about a processing method.

Currently, the amount of waste plastics produced in Korea is increasing by 12% per year, but the waste plastics are not recycled effectively, but more than 50% of them are incinerated or landfilled. However, incineration and landfill of waste plastics cause serious environmental problems by contaminating water quality and air, and interest in recycling waste plastics is increasing day by day.

According to the statistics, in 1993, the amount of waste plastics generated was 1.94 million tons, of which 8.9% of the 170,000 tons were recycled, but in 1999, the amount of waste plastics generated per year was 3.13 million tons. Twenty-five million tonnes, or 20 percent, are being recycled, with more than seven million tonnes occurring in 2010, with 45-50 percent of them being recycled.

As the “Producer Responsibility Recycling System (EPR)” has been enacted since 2003, the increasing problem of recycling recycled plastics is an urgent issue. However, the effective recycling method of waste plastics has not been properly implemented until now. There is a situation.

Conventional technologies for recycling waste plastics include an oil production method using heat, an oil production method, and a fuel production technology using a melt extrusion method using an electric heating method.

Here, the emulsification treatment technology uses plastics made mainly of petroleum raw materials as a product, and then reduces waste plastics back to oil to reduce the amount of petroleum used as well as to improve the environmental environment such as incineration. There are limitations for general operators to operate due to problems such as burden of operating system and chemical system and economic efficiency due to unfavorable production efficiency.

The melt extrusion method using an electric heating method is to process the combustible waste into recycled fuel and burn it to recover energy as heat, and use it as steam, hot water or electricity. Such recycled fuel is processed into a recycle derived fuel (RDF) in which waste plastic is mixed with general combustible waste, a refuel plastic fuel (RPF) using only waste plastic, or alternative fuel of crushed coal or petroleum boiler. For reference, RDF has a calorific value of 4 to 5000 kW / kg, but RPF is 10,000 kW / kg or more, so that it can be utilized in kilns of steel mills and cement plants.

On the other hand, the melt-extrusion method, which is an electric heating method, has a difference in melting point due to the characteristics of the composition of waste plastics. There is a problem that adversely affects the health of workers, such as causing pollution. In addition, there is a problem that productivity is not high compared to the input capacitance.

In addition, wood chips must be melted and extruded to improve the quality of recycled fuels and to reduce the concentration of chlorine (Cl) gas, which is the cause of air problems. In the conventional heating method, wood is carbonized due to high temperature. The smoke was so bad that the work itself was impossible.

As an alternative to this problem, a method of adding slaked lime is used, but when it is used as a fuel, a large amount of combustion residue after incineration causes secondary pollution.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a recycling treatment system and a recycling treatment method for improving the productivity and quality of recycled fuel.

Another object of the present invention is to provide a recycling processing system and a recycling processing method which provides a clean working environment to guarantee the safety of the worker and improve the efficiency of the worker.

In order to achieve the above object, the present invention, a pre-screening device having a magnetic separator to sort and remove the magnetic material contained in the waste plastics, waste plastics from which the magnetic material is removed from the pre-screening device to a predetermined size or less Waste plastics including a pulverizing apparatus for pulverizing, a desorption apparatus for removing foreign substances including sand and earth and sand contained in the waste plastics, and a melt extrusion apparatus for melting and extruding the waste plastics using frictional heat generated by self-driving. Provide recycling systems.

In addition, the recycling treatment system preferably includes a PVC sorting device for sorting and removing the polyvinyl chloride (PVC) contained in the waste plastics. In addition, it is more preferable to include a post-processing plant for post-processing the waste plastics passed through the melt extrusion apparatus according to the use.

In addition, the recycling treatment system preferably includes an additive supply device for supplying additives added to the waste plastics before introducing the waste plastics into the melt extrusion apparatus. The additive may include at least one of wood chips, papers, and ceramic powders.

In the present embodiment, the melt extrusion apparatus includes a pair of extruded gears for melting and extruding waste plastics introduced by being engaged with each other and rotating.

And the molten extrusion apparatus preferably includes a water supply for supplying a predetermined amount of water to the waste plastics prior to melting and extruding the waste plastics.

Recycling treatment method according to the present invention is a magnetic separation step of selecting and removing the magnetic material contained in the waste plastics, the grinding step of grinding the waste plastics from which the magnetic material is removed in the magnetic separation step to a predetermined size or less, the waste plastics And a melt extrusion step of melting and extruding the waste plastics using frictional heat by self-driving to remove foreign substances including sand and soil contained therein.

It is preferable to include an additive supplying step of supplying an additive added to the waste plastics before the melt extrusion step. The additive may include at least one of wood chips, papers, and ceramic powders.

On the other hand, the melt extrusion step is preferably made by a pair of extruded gears for melting and extruding the waste plastics introduced by interlocking with each other. In the molten extrusion step, it is more preferable to supply a predetermined amount of water to the waste plastics before melting and extruding the waste plastics.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

First, referring to Figures 1 to 4, the device configuration of the waste plastics recycling processing system according to the present invention will be described.

1 is a block diagram showing a recycling treatment system according to the present invention, FIG. 2 is a schematic view showing a pre- sorting apparatus, a pulverizing apparatus and a desorption apparatus of FIG. 1, and FIG. 3 is a schematic diagram showing a PVC sorting apparatus of FIG. 4 is a configuration diagram schematically showing the additive supply device, the melt extrusion device, and the post-factory plant of FIG.

Waste plastics to be recycled in the present invention include plastic packaging containers and waste synthetic resins of composite materials used for living or industrial purposes, and may be polyethylene (PE), polypropylene (PP), or polystyrene (PS) depending on the material. , Vinyl chloride resin (PVC), phenol resin (PE), acrylic and the like. And such waste plastics may be configured in a variety of shapes, strengths, colors, etc. depending on the type of product applied.

Recycling treatment system according to the present invention is a system for recycling the waste plastics, largely pre- sorting device 10, grinding device 20, desalting device 30, PVC sorting device 40, additive supply device ( 50), the melt extrusion apparatus 60 and the post-processing device 70 is configured.

The preliminary sorting device 10 is a device for sorting a magnetic material before performing a grinding operation or an extrusion operation, and specifically, a magnetic separator 12 for sorting and removing magnetic materials contained in waste plastics by using magnetic force. It is configured to include.

On the other hand, the preliminary sorting device 10 is preferably configured to include a wave bag 14 for disassembling the bag containing the waste plastics, and an input conveyor 16 for unfolding the waste plastics.

The shredding device 20 serves to grind waste plastics from which magnetic material has been removed to a predetermined size or less through the magnetic separator 12 of the preselecting device, and comprises a shredder for cutting. It is common to be.

The desalination apparatus 30 is a device for removing foreign substances such as sand and earth and sand contained in waste plastics, and can be implemented by various methods such as dry and wet.

In the present embodiment, the desalination apparatus 30 is a dry method, and heavy debris such as sand and earth and sand is discharged due to the difference in specific gravity between the components constituting the waste plastic using the air pressure generated by the impeller. Foreign matter is removed by falling down by its own weight.

On the other hand, in the process of removing the foreign matter as described above, the additional effect that the water contained in the waste plastic can be removed by the air pressure generated in the impeller.

The PVC sorting device 40 is a device that sorts and removes PVC and related malignant materials (hereinafter collectively referred to as "PVCs") that cause harmful gases such as dioxins during combustion in waste plastics. As shown in FIG. 3, a hopper 42 for storing and supplying waste plastics, a sorter 46 for automatically detecting and sorting PVC, and waste plastics so that the sorter can be accurately sorted. It is configured to include a vibration injector 44 to put a predetermined amount.

Meanwhile, FIG. 1 illustrates a form in which waste plastics are introduced into the PVC sorting device 40 after passing through the desalination device 30. Alternatively, the waste plastics first pass through the PVC sorting device 40 before the desalination device. 30 may be formed to be introduced, it is also possible to omit the sorting step by the PVC sorting device 40 according to the state of the waste plastics.

The additive supply device 50 is a device for supplying various additives before introducing the waste plastics into the melt-extrusion apparatus 60, which will be described later, the storage tank 52 for storing the additives, and the waste plastics and It is preferable to comprise the mixer 54 to mix.

The type of the additive is determined according to the type of recycled product to be produced, and preferably includes at least one of wood chips, papers, and ceramic powder.

Although conventional slaked lime was used as an additive, slaked lime did not burn, causing many problems.

In the present invention, the wood chips include all wood flour, sawdust, etc. of wood, and are mixed with waste plastics to suppress the generation of chlorine (Cl) gas during combustion, and papers and ceramic powders are recycled products. In the case of the phosphorus shape, the material characteristics such as the compressive strength of the profile may be improved, and the profile may have a different pattern to provide design diversity.

On the other hand, the additives stored in the storage tank 52 may be pre-mixed with the waste plastics, but flows into the melt extrusion apparatus 60 separately from the waste plastics, passes through the melt extrusion apparatus 60, and then waste plastic in the post-processing step. It is also possible to mix with a kind.

The melt extrusion apparatus 60 is a device for melting and extruding waste plastics by using frictional heat generated by self-driving, and uses pure frictional heat without performing melting by a separate electric heating method as in the related art. The melt extrusion apparatus 60 includes a melt extruder 64 and a water supply 62.

Referring to FIG. 5, the melt extruder 64 melts waste plastics introduced using frictional heat by a pair of extruded gears 65 and 66 engaged with each other and rotating. In addition, the extruded gears 65 and 66 are formed in the form of a kind of helical gear inclined at a predetermined angle, and are configured to be extruded in one direction by rotation.

The water supply 62 serves to supply a predetermined amount of water to the waste plastics before melting and extruding the waste plastics. Although there is no limitation in the form of supplying water, spraying in the form of small droplets is preferable to supply water evenly to waste plastics.

As such, supplying waste plastics to moisture completely breaks the existing stereotype that the waste plastics should be suppressed as much as possible in a recycling system in order to improve productivity. Surprisingly, the production of recycled products was improved.

The post-processing device 70 is a device for post-processing waste plastics that have passed through the melt extrusion device 60 in accordance with a purpose. The post-processing device 70 processes recycled products into recycled fuel such as RPF and RDF, It is processed into profiles for the production of architectural civil engineering materials and decorative landscaping materials.

Specifically, the post-processing device 70 is configured to cut waste plastics that have undergone melting and extrusion into a size suitable for use as fuel when the waste plastics are processed into recycled fuels, or It is configured to be molded into a material having a certain shape so that it can be used as a building civil engineering material.

Next, referring to Figure 6 will be described the recycling method of waste plastics as follows.

First, the bag containing waste plastics is dismantled and the waste plastics are put in an unfolded state (S1). Then, the magnetic material contained in the injected waste plastics is removed by using magnetic force (S3), and the waste plastics from which the magnetic material is removed are shredded to a predetermined size or less by using a shredder (S5).

The foreign substances such as sand and earth and sand contained in the pulverized waste plastics are removed through the air pressure generated by the impeller (S7), and the PVC contained in the waste plastics is sorted out using the PVC sorting device 40 ( S9).

Next, according to the type of recycled product to be processed is supplied additives such as wood chips, paper and ceramic powder to the waste plastics (S11), supplying moisture and melting and extruding the waste plastics (S13).

Finally, the waste plastics are processed into recycled fuel or profile such as RPF or RDF according to the use (S15), and the waste plastics are recycled.

The scope of the present invention is not limited to the above embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

Recycling treatment system and recycling treatment method of waste plastics according to the present invention having the above configuration has the following effects.

First, by melting and extruding the waste plastics using frictional heat by self-driving, there is an advantage that the waste plastics can be produced as a recycled product at a low price.

In particular, it is possible to significantly reduce the power consumption compared to the conventional electric heating method, there is an advantage that can be reduced accordingly the production cost.

Second, by performing extrusion by frictional heat without changing physical properties such as melt extrusion method, it is easy to secondary use of waste plastics, and there is no gas generation during melting, making the workplace environment comfortable and ensuring worker safety. There is an advantage that can maximize the efficiency of the operator.

Third, by supplying moisture in the extrusion process, there is an advantage that can dramatically improve the production of recycled products.

Fourth, by supplying a variety of additives, such as wood chips or paper according to the use of the recycled product, there is an advantage that can improve the quality of the recycled product.

Claims (12)

Pre-selection device having a magnetic separator for selecting and removing the magnetic material contained in the waste plastics; A pulverizing apparatus for pulverizing waste plastics from which the magnetic material is removed from the pre- sorting apparatus to a predetermined size or less; Desorption apparatus for removing foreign substances including sand and earth and sand contained in the waste plastics; And Melt extrusion includes melting and extruding the waste plastics using self-driving frictional heat, and including a water supply unit supplying a predetermined amount of water to the waste plastics before melting and extruding the waste plastics. Device; Recycling processing system of waste plastics comprising a. The method of claim 1, And a PVC sorting apparatus for sorting and removing polyvinyl chloride (PVC) contained in the waste plastics. The method of claim 1, And a post-processing plant for post-processing the waste plastics subjected to the melt extrusion apparatus according to the use. The method of claim 1, And an additive supplying device for supplying an additive added to the waste plastics prior to introducing the waste plastics into the melt extrusion apparatus. The method of claim 4, wherein The additive is recycled waste plastics system, characterized in that it comprises at least one of wood chips (paper chips), papers and ceramic powder. The method of claim 1, The melt extrusion apparatus includes a pair of extruded gears for melting and extruding waste plastics introduced by being engaged with each other and rotating, and recycling the waste plastics. delete Magnetic separation step of selecting and removing the magnetic material contained in the waste plastics; A pulverizing step of pulverizing the waste plastics from which the magnetic material is removed in the magnetic force selection step to a predetermined size or less; A desalination step of removing foreign substances including sand and earth and sand contained in the waste plastics; And A melt extrusion step of supplying a predetermined amount of water to the waste plastics and melting and extruding the waste plastics using frictional heat generated by self-driving; Recycling treatment method of waste plastics comprising a. The method of claim 8, And an additive supplying step of supplying an additive added to the waste plastics before the melt extrusion step. The method of claim 9, The additive is a method of recycling waste plastics, characterized in that at least any one of wood chips (paper chips), papers and ceramic powder. The method of claim 8, The melt extrusion step is a recycling method of waste plastics, characterized in that made by a pair of extruded gears for melting and extruding the waste plastics introduced by interlocking with each other. delete

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