KR20070067759A - Intervened raw matter pellet made of agricultural scrapped vinyle wrapper and manufacturing method - Google Patents

Abstract

A method for producing intermediate pellets for the civil engineering and construction by using agricultural waste vinyl is provided to make pellets of a predetermined shape for various engineering and construction materials at low cost by separating foreign materials and drying moisture through various pretreatment devices and then processing the pretreated waste vinyl by a molding machine and a pellet cutter. The method for producing intermediate pellets for the civil engineering and construction by using agricultural waste vinyl comprises a mulching waste vinyl pretreating process for crushing mulching waste vinyl attached with soil, separating foreign materials, and drying moisture and a pellet producing process for molding the pretreated waste vinyl into pellets by using a pelletizer composed of a melting extruder and a pellet cutter.

Description

Intermediate raw matter pellet made of agricultural scrapped vinyle wrapper and manufacturing method

1 is a perspective view at the time of trommel crushing

2 is a schematic layout explanatory diagram of a blow drying device;

3 is a schematic cross-sectional view of a pellet cutter

4 is a partial perspective view of an extrusion die;

5 is a pellet photograph produced by the method according to the invention

The present invention is a method of collecting and recycling mulching waste vinyl containing very high amounts of soil and water used and used in rural areas. The present invention relates to an intermediate raw material pellet for civil engineering, which is obtained by melting and extruding mulching waste vinyl, which still has a high content of foreign matter such as soil, and a manufacturing method thereof.

Since the creation of the first synthetic resin, the phenolic resin in 1909, the plastics industry has developed remarkably with the development of the petroleum industry, and plastics are now an indispensable material in our lives.

However, as environmental pollution became a global concern, the problem of disposal of waste plastics became serious enough that the solution could not be delayed anymore. The reason for this is that plastics do not occupy a lot of volume due to their low density when they are landfilled, and they take a long time to decompose, which adds to landfill difficulties, and in addition, there is a possibility that large amounts of toxic gases may be emitted during combustion. Because it is.

As with all other waste plastics, the best disposal for agricultural mulching waste vinyl is recycling. However, agricultural mulching waste vinyl is used in direct contact with soil, so it is occupied by about 85% of foreign matters such as soil and moisture, so it is very difficult to remove and recycle materially. Therefore, Korea Environmental Resources Corporation cleans it in a water tank after pretreatment such as crushing, but the cost of the process is excessive compared to the value of the regenerated product. It is a position to take a deficit, and even then, stocks are still growing. On the other hand, if it is not actively collected and disposed of, it will be obvious that the rural environment will be ravaged by waste vinyl, which generates about 260,000 tons annually nationwide.

As mentioned above, agricultural mulching waste vinyl is generated as a crude amount of about 260,000 per year, about 30% of which is collected by Korea Environmental Resources Corporation, and the amount collected by private sector accounts for about 8-9% of total generation. do.

About 33% of the waste vinyl recovered by the reclamation work is supplied to the private sector through the process of sorting, etc., 27% of the amount is processed at the reclamation processing plant of the reclamation work, and about 34,000 tons, which is about 40%. The degree is stagnant every year.

Among them, the amount of mulching waste vinyl is about 210,000 tons per year, of which 32% is recovered by regeneration works, and almost no amount is recovered by the private sector. About 36% of construction collections are handled by the reclamation processing facilities owned by the construction, and some are supplied to the private sector through simple screening. However, the demand for these is not high enough. It is true.

The waste vinyl for house generates about 80,000 tons per year, and a large part of the total amount is collected by the private sector, which is recycled relatively easily due to the slight pollution, so it is not necessary to pre-treat and can easily recycle materials. .

The characteristics of mulching waste vinyl vary greatly depending on the type of vinyl (HDPE and LDPE), region, and time point. However, as a result of roughly understanding, the mulching waste vinyl has only 10% of its pure components in HDPE and about LDPE. 19%, within 15% on average.

In particular, when the soil is yellow soil, it is very difficult to remove it, and there is a considerable difficulty in pretreatment of mulching waste vinyl, so that it is also difficult to actually recycled fuel (RDF).

As the oil resources currently on earth are expected to be exhausted by 2038, most countries are responding by maximizing recycling. In Korea, various systems and technologies are being developed or introduced for recycling. In particular, when plastics such as vinyls obtained from petroleum resources are recycled, it is advantageous because it can save not only raw materials but also energy required from purification to products. To remove some foreign matter and water, the construction of construction materials such as sewage pipes, earth plate, highway boundary stone and median separator, and artificial reef is an alternative and convincing.

Therefore, the mulching waste vinyl can be divided into the process of removing the foreign substances such as soil and moisture, and melting the pretreated mulching waste vinyl to manufacture civil engineering materials such as earth pipes. Performing a forming process will not be new given the ease of operation or existing techniques.

Indeed, there are hundreds of companies in Korea that use pre-treated mulching waste vinyl to manufacture construction materials such as sewer pipes, earthen boards, highway boundaries and central separators, and household goods such as ham papers, septic tanks, and industrial products such as aeration tank microbial carriers. .

In addition, neighboring China, Southeast Asia such as Vietnam, Russia, and so on, demand for PE or recycled PE has increased so even PE recycling plants, which resume operation only on the day when waste PE is collected from landfills, are inadequate. to be.

Therefore, securing the pretreatment and intermediate processing technology of agricultural mulching waste vinyl is the key.

From this point of view, if agricultural mulching waste plastic produced in Korea is properly processed and manufactured into intermediate materials for injection of civil engineering materials, it will be obvious that these countries will be used in various ways as raw materials for civil engineering in these countries. The problem is that the collected mulching waste plastics are not allowed as waste to be exported through border movements or trade, so they must be pretreated to meet certain standards of construction materials.

Therefore, these mulching waste vinyls can be used to meet domestic demand and to meet the demands of neighboring countries by recycling waste vinyl derived from petroleum at a time when international oil prices soar, rather than material recycling by expensive wet washing. Appropriately responding is the calling of the times.

In particular, the demand for waste PE or recycled PE has soared in neighboring countries such as China, Southeast Asia such as Vietnam, and Russia, and even PE recycling plants that resume their operations only on the day of collecting waste PE from landfills are sluggish. From this point of view, if agricultural mulching waste vinyl, which is a large quantity that is not processed well in our country, is processed properly, it is obvious that it will be used in various countries as a raw material for civil engineering in these countries. The problem is that border movement is not allowed as waste, so it must be pretreated to meet certain standards of construction materials.

Therefore, there is a need to economically treat a large amount of mulching waste vinyl by reducing the shortage of construction raw materials by developing a raw material for civil engineering in a simple and unique way by reusing it only by wet cleaning and securing economic efficiency. to be.

As long as the mulching waste vinyl can be effectively pretreated and properly processed, it can be directly used for various purposes as described above.

However, until now, pre-treatment of mulching waste vinyl has been done by hand, and due to the nature of long twisted and heavily contaminated mulching waste vinyl, even skilled workers have only processed about 250kg per day. In particular, mulching waste vinyl has a high adhesion to the wet soil of the soil, even if pretreatment by manual diarrhea had a limit to remove the contaminants.

 In particular, no device or technology has been introduced in Korea, which still pelletizes waste vinyl, which has a soil content of about 40%.

Therefore, an object of the present invention is to remove the debris and the like in a suitable state through pretreatment of the collected mulching waste vinyl, and to process it as an intermediate raw material for use as a construction material by using a raw material still containing a considerable amount of foreign matter. To provide a method for producing into a pellet (pellet).

The intermediate pellets for construction using agricultural waste vinyl according to the present invention and a method of manufacturing the same have been subjected to pretreatment such as crushing, separating and drying foreign mulching waste vinyl for agricultural use. The present invention relates to a technology capable of mass producing pellets, which are intermediate raw materials for civil engineering materials, which have a uniform and beautiful shape.

Therefore, the pellet manufacturing method according to the present invention is a dry and pre-treatment process for performing foreign matter separation and drying in the crushing of agricultural mulching waste vinyl and pre-treated but still using the waste vinyl containing about 40% foreign matter constant and beautiful pellets It is roughly classified into a pellet manufacturing process for molding into a mold.

The mulching waste vinyl pretreatment process includes a mulching waste vinyl crushing step of finely crushing the mulching waste vinyl collected in rural areas, and removes foreign substances such as soil from the crushed mulching waste vinyl while removing moisture from the crushed mulching waste vinyl. Blower drying apparatus for treating foreign matter and water by using a trommel crusher to remove the foreign matter and the water removal step by the trommel crusher to the blow dryer device to contain the moisture suitable for molding It consists of a drying step by.

In the mulching waste vinyl shredding step, the collected mulching waste vinyl has a length of several tens of meters and is entangled with each other, so it is difficult to move as it is to be put into a recycling process, so it is usually picked up by a crane called a tong truck and put into a shredder. To shred to about 50 cm in size.

The foreign matter and water removal step by using the trommel crusher is a low-speed rotation (about 8 RPM) while passing through a large cylindrical wire mesh (diameter of 30 ~ 50 mm size) of about 150mm in diameter, about 3,500mm in length As a step of removing foreign matters by the impact of several blade-shaped hairs rotating at high speed (about 250 RPM) and forced air,

The apparatus for performing the foreign matter and water removal step using the trommel crusher is a cylindrical trommel 11 and the both ends of the trommel is installed inclined up and down to the network so that the wind passes well as shown in FIG. A shaft formed on the central axis of the trommel drum 10 and a trommel drum 10 having a rotatable configuration and having an upper ring 12, a middle ring 13, and a lower ring 14, each having a ring shape in the middle thereof. The drive unit 20 is composed of a 21 and the lower end side of the shaft 21 and the hair driving unit 22 for rotating the shaft 21 and the trommel driving unit 23 for rotating the trommel drum 10 and A plurality of hairs 31, which are made of a plate-shaped mounting plate fixed to the outer circumferential surface of the shaft 21 and a rectangular post-plate hair plate 31 linked to the top of the mounting body, are adjacent to the shaft 21. ) Hairs 30 alternately configured with each other, trommel drum The fender part 41 formed on both sides of the trommel 11 along the entire length at the bottom of the bottom part 10 and the wooden beams formed while supporting the bottom part of the fender part 41 are formed. Consists of a support portion 40 composed of a frame portion 42 formed by weaving.

The trommel 11 may rotate alternately in both directions, but rotation only in one direction does not adversely affect the flowability or workability of the vinyls, and when rotated counterclockwise, at 7 o'clock and 9 o'clock. Blowing air in the 1 o'clock direction will further promote the removal of foreign substances and the drying effect. Installing a 120mm high triangular jaw on three parts of the cylindrical trommel 11 lifted the vinyls from the low position to the relatively high position, and the vinyls falling from the high position were severely hit by the hairs 31 rotating inside. It spreads, foreign matter is separated and dried. In order for the vinyl to be discharged naturally, the inclination of the trommel (11) should be set. The inclination should be adjusted according to the desired residence time, but for most vinyls, 12.7 ^o was appropriate.

When passing through the trommel (11) in this way, less than 20% of the waste vinyl is pretreated to about 40% purity, the soil composition is about 26% and the remaining water is about 34%. When the diameter of the cylindrical trommel (11) as a reticle is small or when the permmel (11) perforated in a steel plate is not used, the drying and separation effects are not properly performed, and vinyls are easily entangled with each other to form a long bundle. It should be noted that If it is necessary to keep the mesh scale of Trommel (11) smaller, it is possible to use a nylon mesh with a smaller scale.

 TABLE 1 Average Characteristics of Pevinyls Passed through Trommel Separator

unit Item Value Remarks PE pure ingredients % 38 moisture % 33 Burning loss % 29 Earth and sand ingredients (650 ^o C, 3 hours)

The drying step by the blower is performed by adopting a blower type drying apparatus to dry the waste vinyl with moisture suitable for molding, and unlike the general fibers, the waste vinyl has no micropores in the tissue and thus is compressed. Even if it is applied or heated, the internal moisture is not removed by the pocket or blanket phenomenon. Therefore, it is dried by a blow drying device, which is a drying device including a suitable input means for blowing waste vinyl into a long pipe with strong warm air and forcing it to dry by disturbance.

The blower drying apparatus is a hot air blower for generating hot air through the air passage and blower 10 having a predetermined diameter (about 25 cm) and a predetermined length (about 30 m) as shown in FIG. (20) is installed and a special hopper (ejector) 30 for preventing the back flow to the mulch waste vinyl is injected into the body of the air path adjacent to the hot air is formed and keeps a predetermined length (about 15m) after the hot air around the hopper. A cover 40 is installed, and a net pipe 50 is installed at the other end of the air path, followed by a tilted fixed screen drum 60, and finally a bag-shaped spigot 70 made of fabric paper. . Blower drying device composed of such a configuration injects waste vinyl containing moisture through the hopper 30 by blowing the hot air in the air path 10 by the hot air blower 20, and disturbs the warm air and the waste vinyl introduced by blowing While the dry and separated waste vinyl and foreign matter passes through the net pipe 50 and the screen drum 60, the foreign matter and water vapor escapes, and finally, the waste vinyl is transported to the stool 70 and finally dried. The drying result was very good, and when passed through the device of 30m length with a diameter of about 25cm, the waste vinyl had a water content of less than 6%, and the soil content also had a side effect of decreasing the total amount.

TABLE 2 Average Characteristics of Pevinyls Passed through Blower Drying Equipment

unit Item Value Remarks PE pure ingredients % 57 moisture % 6 Burning loss % 47 Earth and sand ingredients (650 ^o C, 3 hours)

The pretreatment process of mulching waste vinyl is completed through the above processes.

The mulching waste vinyl, which is crushed and partially removed through the pretreatment process, still contains a large proportion of foreign matter, but may be manufactured as pellets, which are intermediate raw materials for injection of civil engineering materials, having a predetermined form through a pellet manufacturing process. . For reference, if a certain amount of soil foreign matter does not interfere only with pellet molding, it can function as an environmentally friendly material such as exhibiting vegetation ability when used as a construction material as compared to pellets made of PE alone.

The mulching waste vinyl, which has been subjected to the pretreatment process, is attached to the waste vinyl as shown in the <Table 1> and the amount of remaining soil component remains roughly constant.

Therefore, it is a condition that can be used as an intermediate raw material of mulching waste vinyl that has undergone pretreatment process, but it is difficult to be transported or handled in a dry state and recycled, so it is not suitable to be used as an intermediate raw material. As a compound, a pure PE compound and a soil composition are mixed at a constant ratio, and the form and contents of the pellets no longer stay in the waste and are upgraded as raw materials of articles such as construction materials having a certain form.

In fact, it is common to produce pellets using recycled PE of high purity. In Korea, there were no cases where pellets were easily manufactured to export using waste vinyl having a content of about 40%.

Therefore, it is a technology to manufacture beautiful pellets in a simple way that can be handled as a fair civil raw material, not waste, even if the difficult conditions for customs clearance by moving borders in neighboring countries.

Although the principle of such pelletization process is relatively simple, mixed hot cutting method is adopted instead of the cold cutting method generally adopted in the recycling industry. When the cold cutting method is used, if the raw material contains more than a certain level of moisture or foreign matter, it is frequently interrupted when the raw material immediately passes the product along the cooling water tank, thereby acting as a factor that inhibits productivity. In contrast, the newly developed pelletization manufacturing process according to the present invention is performed by a pelletizer by applying a mixed hot cutting method, and the pelletizer surrounds the end outlet portion of the melt extruder as shown in FIG. while spray cooling water to the raw material of the product just before exiting the die in both directions, but the cut to biaxial blade rotating at a high speed, and the angle value is the blade and materials find ever orthogonal to maintain a rather than 75 ^o such that an angle cut is made It was. In other words, the shape of the formed pellets was constant and was installed by finely adjusting the shape and cutting angle of the blade so as to maintain a beautiful appearance with a suitable oval. If cut at right angles, raw materials containing a lot of foreign materials are cut roughly, which is a decisive factor, which is a decisive factor in degrading the product quality.

The pelletizer is composed of a melt extruder (not shown) and a pellet cutter 320. The melt extruder is supplied with waste vinyl in a hydrous state to make a molten state, kneaded to earth and sand components, and dehydrated to adjust the amount of water. Feed through a pellet cutter.

The pellet cutter 320 is formed in communication with the discharge portion 311 of the melt extruder, the cutter cooling water is circulated and supplied from the cooling water supply port 322, the cooling water and the pellet is discharged from the pellet outlet 323.

3 is a schematic cross-sectional view of the pellet cutter 320 showing the hot cut method of cutting. The pellet cutter 320 has a plurality of extruded holes which are concentrically arranged in front of the extrusion die 322 in the molten PE and the earth and sand mixture discharged from the discharge hole 311 of the melt extruder in the normal body 320B. Immediately after being extruded from 322h and arranged concentrically to be cut by the rotation of the cutting blade 323, the cutting blade 323 is installed on the free end of the rotating shaft 324 is rotated, 324 is formed by dividing into two pillar-shaped body is linked, there is a spring (326) to maintain a constant tension between the rotating shaft 324 and the cutting blade 323 is attached to the waste plastic that is discharged raw material such as metal and hard foreign matter In this case, the cutting blade 323 is to cut off the foreign matter to protect from abnormal wear of the cutting blade 323, the coolant spray nozzle 325 is formed in the cutter body (320B) Cold The number is provided so that the injection to the plurality of extrusion sphere (322h) arranged in a concentric circle on the front face of the extrusion die 322.

FIG. 4 is a partial perspective view of the extrusion die 322. When the liquid PE and the earth and sand mixture in the molten state are discharged from the extrusion hole 322h, a plurality of concentrically arranged and obliquely disposed on the front surface of the extrusion die 322. The cutting blade 323 rotates the front of the extrusion die 322 to cut the kneaded material extruded from the extrusion hole 322h to a suitable size to make a soft pellets, and the cut soft pellets are cooled water spray nozzles ( As the water is cooled by the cooling water sprayed by 325, it solidifies, and pellets are formed in the form of a constant and beautiful bean as shown in FIG.

After cutting, the pellet is poured out through the outlet of the cutter body 320B together with the water used as the coolant, which is transferred to the vibrating sieve (not shown) of the porous bottom, and the water falls down through the perforation. The remaining pellets are collected in one place and transferred to a reservoir. In this case, it is much more effective to install a device for blowing dry air to the vibration sieve or to transfer the blower to a blower when transferring it to a storage tank.

Pellets which are intermediate raw materials for the injection of civil engineering materials according to the present invention, and their manufacturing method are used for mulching in rural areas, and the waste vinyl is separated and dried by using various pretreatment devices developed by Korea Environmental Resources Corporation. It relates to pellets of uniform and beautiful shape suitable for manufacturing various kinds of civil engineering materials by using a molding machine and newly designed pellet cutter, and a method of manufacturing the same. We secured the technology to export to neighboring countries.

According to the method according to the present invention, the mulching waste vinyl used is affected by the pretreatment efficiency according to its type and contamination state, but there is no difficulty in preparing the final product pellets, and all of them can be manufactured as beautiful pellets.

In Korea, there is no standard property or property as a raw material for physical regeneration of waste vinyl recycled materials. However, in order for export to be recognized as an industrial property right by the customs clearance procedure of the relevant country, the appearance must be constant and beautiful, and in industrial use, the product must have uniformity and mass production. Suitable. Considering that the waste plastic recycled products could not be exported until this time, the degree of processing was so poor that it was not recognized as a raw material for civil engineering. It is the pellet of this invention.

Therefore, the raw materials for civil engineering using PE waste vinyl produced using this technology promote the recycling of agricultural waste vinyl, which generates about 260,000 tons per year in rural areas when exported to neighboring countries as well as domestic demand. Of course, since it does not have to use a large amount of water for washing, it can be consumed as an intermediate raw material for industrial materials by pretreatment in an extremely environmentally friendly manner. In particular, the method of treating mulching waste vinyl by the method according to the present invention is economical because it can simply and largely process waste vinyl, which is difficult to separate and dry in the conventional method, and the specially designed mixed hot cutting device still has a considerable amount of foreign matter. It is not only economically able to form the final product pellets containing waste vinyl, but also its beautiful appearance and maintains a certain shape, so it is possible to meet domestic demand and export as it is a raw material for civil engineering, which does not interfere with border movement. .

In particular, if the soil foreign matter does not interfere only with the pellet molding, when used as a construction material, compared to the pellets used by PE alone, it is possible to stand out as an environmentally friendly material, such as the ability to grow vegetation (植 生 植) stand out.

The pellets manufactured by the method according to the present invention can be directly used for various constructions such as sewage pipes, earthen boards, cheonnyeon or slope protection blocks, artificial wood, highway boundary stones and central separators, as well as household articles such as ham paper. Because it can be used to use the waste oil resources usefully, and when applied to the existing wet process or dry process, the process cost is reduced by significantly reducing the load required for washing in the process, the method according to the present invention is carried out The application of techniques derived from these processes can be used for other waste separation and drying equipment, thereby promoting waste recycling by expanding field adaptability.

The present invention will ultimately contribute to the national economy through environmental protection through the saving and recycling of resources and securing and exporting stable recycled materials.

Claims (3)

A mulching waste vinyl pretreatment step of crushing the mulching waste vinyl to which soil is attached to separate foreign matter and drying; A pellet manufacturing method comprising a pellet manufacturing step of molding pretreated waste vinyl into pellets by a pelletizer consisting of a melt extruder and a pellet cutter. The method of claim 1, wherein the mulching waste vinyl pretreatment process comprises a mulching waste vinyl crushing step of finely crushing the collected mulching waste vinyl to recycle the mulching waste vinyl, soils, etc. buried in the mulching waste vinyl crushed using trommel. At the same time, the debris and water removal step using trommel to remove the moisture on the crushed mulching waste vinyl while removing the debris, the debris and water removal step by the trommel is put into the blower to form A method for producing pellets comprising a drying step by a blower which is treated to contain suitable moisture. A pellet produced in the form of a bean by kneading mulching waste vinyl having a content of soil component of 30% to 45% through the method of manufacturing a pellet of claim 1.

Images