KR100948490B1 - The selection method recycling plastic - Google Patents

Abstract

PURPOSE: A selection method for recycling plastic is provided to reuse the plastic mixed in household waste by assorting the plastic from the household waste, and to reduce air pollution by preventing the plastic from burning with other waste. CONSTITUTION: A selection method for recycling plastic comprises the following: a step of assorting water; a step of assorting steel and metals; a step of assorting plastic including PE, PP, PS, and PET by classification using near infrared ray sensor; a step of wind force selection process to assort light plastic; a step of assorting aluminum cans from the selected light plastic; a step of crushing the light plastic; a step of assorting crushed light plastic into PE, PP, PET, and PVC using gravity difference in a water tub; a step of dehydrating the selected PE, PP, PS, PET, and PVC; a step of drying the selected PE, PP, PS, PET, and PVC; and a step of minutely assorting PE, PP, PS, PET, and PVC.

Description

The selection method recycling plastic}

The present invention relates to a method for sorting recycled waste of household waste, excluding industrial waste, and in particular, PE, PP, PS, PET, which can recycle PE, PP, PS, PET, PVC, vinyl, etc. It is to separate from vinyl, and the process of separating plastic sheet, film, earth and sand, and sorting fibers, cloth, etc., using the Bali sorting machine to separate the household waste flowing through the conveyor, and separating the film, textiles, etc. PE, PP, PS, PET are sorted as the waste is passed through the first magnetic separator and the metal can is separated, and the plastic sheet and film and the waste separated from the ferrous metal are passed through the chamber where the near infrared sensor is applied. Process, and the waste sorted PE, PP, PS, PET is sorted by falling distance due to the difference in weight while being scattered by the wind while passing through the wind sorting device, and the light weight sorted by the wind sorting device ( Some of the PE, PP, PS, PET and PVC mixed plastics (hereinafter referred to as mixed plastics), aluminum cans, and small amounts of ferrous metal cans, which were not screened during the infrared screening process, are rotated at A process of bouncing and sorting aluminum cans while passing through a second magnetic separator forming a moving magnetic field, crushing the mixed plastics, sorting by the difference in specific gravity of each kind of crushed mixed plastics, and a specific gravity difference Separate the PE, PP, PS, PET from the process of separately dehydrating the mixed plastic that has not been selected in the process, drying the dehydrated mixed plastic, and passing the dried mixed plastic through an electrostatic sorter generated by friction. The present invention relates to a method for sorting recycled plastic consisting of a sorting process selected from PE, PP, PS, PET and PVC, which remain in small quantities.

In general, household waste is well separated in communal housing such as apartments, but it is not easy to separate and collect in independent houses, so mixed garbage is mixed in mixed plastics (mixed plastic, waste paper, iron metal cans, aluminum cans, glass Bottle, a small amount of fibers, etc.), there is a problem that is collected.

When separating the household garbage as above and sorting the recycled plastic from the separated mixed plastic again, it is not easy to completely separate the recycled plastic (PP, PE, PS, PET) from the mixed plastic with the naked eye. There is a problem that it is difficult to improve workability due to the work environment such as odor.

The present invention is a living waste (mixed plastic, a small amount of ferrous metal cans, aluminum cans, glass bottles, fibers, solid plastics, etc.) is attached to the film, a small amount of glass bottles, a small amount of soil and sand, plastic using a Bali sorting machine. The process of sorting soils and sands, the process of sorting fibers and solid plastics, the process of sorting ferrous metal cans through a first magnetic separator, and the mixing of plastics (PE, PP, PS, PET and PVC) ) Passes through a chamber in which a near infrared sensor for sensing only PET, a chamber with a near infrared sensor for sensing only PP, and a chamber in which a near infrared sensor for sensing only PS is formed, and selects a near infrared ray for selecting PET, PP, PS, and PE separately. Mixed plastics (PE, PP, PS, a part of PET and PVC) that are not screened in the process and near-infrared sorting process are attached to the mixed plastics while passing through the wind separator. Sand, sand, etc., the process of sorting by weight of plastic while light weights (parts of PE, PP, PS, PET and PVC), heavy weights (solid plastics) and small amounts of ultra-light weights (films, etc.) The aluminum cans are passed through a second magnetic separator that forms light currents (PE, PP, PS, PET, and some parts of PVC, ferrous metal cans, and aluminum cans) separated by the wind, forming vortices and magnetic forces by magnetic fields. It is separated and discharged by the magnetic field vortex, and mixed plastics (PE, PP, PS, and a part of PET and PVC) are separated and moved to a conveyor, and the process of separating and discharging ferrous metal cans and mixing separated by the wind power. The process of crushing plastics (parts of PE, PP, PS, PET and PVC), and crushed mixed plastics (parts of PE, PP, PS, PET and PVC) are recycled according to the specific gravity difference of each plastic. Process to sort PE (PP, PS, PET) The process of separating from the ticks), dehydrating mixed plastics (PE, PP, PS, PET, PVC) that were not screened in the specific gravity difference screening, drying the dehydrated mixed plastics, and drying the dried mixed plastics. The purpose of the present invention is to provide a recycled plastic sorting method for separating PVC from mixed plastic to the maximum through various processes of separating PVC and PE, PP, PS, and PET while passing through the electrostatic separator.

According to the present invention, films, fibers, earth and sand, lightweight materials (mixed plastics), and heavy materials (solid plastics) are discharged to Bali in a volley plate operating in a volley sorter installed inclined. The volley sorting process for discharging soil, sand, etc. buried in the volley plate, the sorting process for fibers and heavy materials, and the light material (mixed plastics and cans) are passed through the first magnetic sorting device. The canister is screened by magnetic force, and the light object that has passed the magnetic screening process passes through a chamber in which a near-infrared sensor that senses only PET is formed, and PET is selected. While the process of screening only the PE, and the process of screening only PP while passing through the chamber for sensing only PP in the same way, and the chamber for sensing only the PS in the same way. And the process of screening only PS, and some of the recycled plastics (PET, PE, PP, PS) that were not screened out of the light products passed through each sorting device, and all of the PVC through the windscreen, The process of sorting by type from the mixed plastic dropped by weight and falling by weight, and the light weights (PET, PP, PS, PE part, PVC, cans) selected by the wind sorting device pass through the second magnetic separator The aluminum can is bounced away by the magnetic field generated while the drum rotates at high speed, and the ferrous metal can is separately discharged and sorted by magnetic force, and mixed plastics (PET) passed through the second magnetic separator. , The pieces of PE, PP, PS and a part of PVC) and the crushed fruit species while passing through the crushing device, and crushed mixed plastics in the water tank to pass each specific gravity through the specific gravity screening device To sort by middle,

Yes ; PVC has a specific gravity of 1.3 or more, so it has the largest specific gravity in mixed plastics. Therefore, recycled plastics with a low specific gravity (lower than 1) are arranged at the lower part of the tank.

The process of dehydration of recycled plastics (PET, PE, PP, PS) and mixed plastics (part of PET, PE, PP, PS and part of PVC) selected from specific gravity screening device while passing through the dehydration device; Device for drying dehydrated mixed plastics (parts of PET, PE, PP, PS and part of PVC), and dried mixed plastics (parts of PET, PP, PS, PE and part of PVC) by electrostatic As recycled plastic and PVC are ionized differently, recycled plastics and PVC move to different electrode plates, while PET, PP, PS and PE move to the cathode plate, and PVC moves to the anode plate. The process consists of separating PE and PVC separately.

Recycling plastic sorting method according to the present invention can replace the import of resources by selecting and recycling plastics that can be recycled from household waste can be prevented waste of foreign currency, reducing the production cost required for reproduction and Labor costs can be reduced because labor can be reduced, and the profitability of the waste recycling industry can be improved, which is buried underground to prevent damage to nature or damage to the atmosphere by burning in mixed plastics.

The present invention is the process of sorting the film, earth and sand, sand, glass pieces, etc. by using the volley plate 12 of the Bali sorting machine 11 for household waste (mixed plastics, film, clothing and fibers, solid plastics, cans, etc.) The process of sorting clothes, textiles, and solid plastics through water sorting in the water sorting table 13, and the process of sorting the metal can 204 through the chamber 16a of the first magnetic separator 14. The process of sorting only PET while passing through the chamber 16b of the near-infrared sorter 18a passes through the magnetic separator 14,

The process of sorting only the PP while passing through the chamber 16c of the near-infrared selector 18b in which the near-infrared sensor 17a, which senses only the PP, is sensed as described above;

In the same manner, the process of sorting only the PS while passing through the chamber 16d of the near-infrared sorter 18c sensing only the PS,

In the same manner, the process of sorting only PE while passing through the chamber 16e of the near-infrared sorter 18d for sensing only PE,

After the PET, PP, PS, PE is sorted, a small amount of PP, PS, PE and PVC passes through the wind sorting device 19, a small amount of soil, sand, etc., a small amount of cans, and a small amount of light and PP, PS, PVC, etc.) and the ultra-lightweight (film, etc.) are separated by the wind of the blowers (32a, 32b) installed in the wind sorting device 19, the screening process in the state dropped to a different distance due to the difference in weight And, the PET is formed as a container is almost selected in the sensor screening process.

Light cans (parts of PE, PP, PS, PVC, and small amounts of cans) discharged from the wind sorting device 19 pass through the second magnetic separator, and the aluminum cans are caused by magnetic vortices generated by the magnetic drum rotating at high speed. And the ferrous metal can is moved to a state attached to the magnetic force and then dropped in the loss of magnetic force, and the part of the mixed plastics (PE, PP, PS that passed through the wind sorting device, The process of pulverizing the PVC) and the pulverized mixed plastic are transferred to the water tank 24 of the specific gravity wet sorting device 23, so that the plastic having a small specific gravity according to the specific gravity of each kind of the mixed plastic is the water tank 24. Plastic of the kind discharged from the top and having a high specific gravity is configured to be discharged under the water tank 24.

That is, the large specific gravity plastic (PVC) is discharged in the settled state of the water tank 24, the small specific gravity recycled plastic (PP, PS, PE) is floated above the water tank 24 is discharged and sorted.

Dehydrating the mixed plastic and recycled plastic discharged from the wet separator 23 in the dehydrator 25;

Transporting and drying the mixed plastics (a small amount of PP, PS, PE and PVC) sorted and dehydrated in the specific gravity wet sorting device 23 to the drying device 26;

The dried mixed plastic is transferred to the chamber 16e of the electrostatic separator 28 and passed through the positive electrode plate 29a and the negative electrode plate 29b, and according to the electrostatic potential, PVC acts on the potential of the positive electrode plate 29a and a small amount of PP. , PS, PE and the like is composed of a process that can separate the PVC by acting on the potential of the negative electrode plate (29b).

1 shows a process of the present invention.

Figure 2 shows the whole process according to the present invention in a technical configuration.

Figure 3 shows in detail the first half of the process according to the invention.

4 shows in detail the latter part of the process according to the invention.

Figure 5 shows the operation of the first magnetic separator according to the present invention.

Figure 6 shows the operating state of the near infrared sorting apparatus according to the present invention.

7 shows an operating state of the second magnetic separator.

8 shows an operating state of the electrostatic screening device.

The present invention will be described in detail with reference to the accompanying drawings and embodiments.

Bali screening process according to the present invention is a configuration for screening the film, soil, sand and the like in the garbage.

The volley sorter 11 used in the volley selection process is composed of a volley plate 12, and the volley plate 12 is an improvement of the volley plate of patent application No. 10-2008-96987 (garbage sorting device).

The volley plate 12 is inclined in the direction in which the volley plate 12 volleys, and the upper surface of the volley plate 12 forms valleys and ridges in the shape of a corrugated plate (not shown), and the ridge lines are formed at the same pitch.

Small holes (not shown) are drilled in the valley of the volley plate 12 so that when the volley plate 12 volleys, the soil and sand attached to the soil, sand and garbage are detached and discharged into the hole.

In addition, the film, mixed plastics, a small amount of cans, solid plastics, fibers, etc. are formed to move in the volley direction, that is, the upper direction, discharged by type, and transported to the conveyor 101.

The household waste conveyed to the conveyor 101 is formed so as to sort and discharge solid plastics, fibers, etc. while passing through the water sorting table 13.

The waste which has passed through the water sorting table 13 is transferred to the chamber 16a of the first magnetic separator 14 so that ferrous metal cans are sorted by magnetic force, and within the chamber 16a of the first magnetic separator 14. Before. The belt 203 is formed to circulate to the two magnetic rolls 201 and 202 and the auxiliary rolls 201a and 202b to the rear, and the magnetic force is formed by applying electric power to the two magnetic rolls 201 and 202.

The ferrous metal can is attached to the rear roll 202 where the magnetic force is formed, and when the can passes through the roll 202, the magnetic force is released to the belt 203 and the ferrous metal attached to the belt 203 is configured. The can is configured to fall.

As described above, the living garbage (part of the solid plastic, PET, PP, PE, PS, PVC, film, etc.) passing through the first magnetic separator 14 is formed to be transferred to the near-infrared sensor sorting process.

The household garbage passing through the first magnetic separator 14 is formed to pass through a chamber in which the near infrared sensor 17a of the near infrared sorter 18a is installed.

When the PET senses the PET while passing through the chamber 16b in which the near-infrared sensor 17a for sensing only the PET is formed, air is injected from the air injector 15a to shoot and separate the PET to open the opening 30a. It is configured to be discharged into the housing 20a.

In the same manner, while the waste passes through the chambers 16c, 16d, and 16e of the respective near-infrared sorters 18b, 18c, and 18d, the PP, PE, and PS are sensed by the near-infrared sensors 17b, 17c, and 17d, and the injector 15b, Air is injected by the operation of 15c and 15d to shoot each PP, PE, and PS and discharge it into the openings 30b, 30c, and 30d to be accommodated in the receiving containers 20b, 20c, and 20d.

When the PET, PP, PE, PS contained in the housing (20a, 20b, 20c, 20d) is discharged as described above, only one type is transferred and is formed to be compressed and discharged by the compression discharge device 21 for each type. .

The injector 15a, by sensing the near infrared sensors 17a, 17b, 17c, and 17d while passing through the chambers 16b, 16c, 16d, and 16e of the respective near infrared sensor selectors 18a, 18b, 18c, and 18d as described above. 15b, 15c, 15d)), PET, PP, PE, PS is screened and the remaining waste (solid plastic part, PP, PE, PS part, PVC, film, etc.) is screened using wind conveyor 105 It is configured to be transferred to the process.

Since the PET is mostly containers, the PET is omitted from the waste transported to the wind separator because it is almost selected by the near infrared sorter.

In the windscreen selection unit 19 of the windscreen selection process, three chambers 301, 302, 303 are formed over the length thereof, and waste is discharged by wind power of a blower (not shown) formed in the windscreen device 19. It is formed so as to be separated from the fall and discharged, and foreign matters such as soil, sand, etc., through which the waste passing through the chambers 301, 302, 303 dropped by the weight difference is discharged before passing through the chambers 301, 302, 303. Among the wastes passing through the chamber 301, heavy materials such as solid plastics having a large weight are dropped from the chamber 301 and discharged, and lightweight materials such as mixed plastics (PP, PE, PS part, PVC) and cans. Is dropped from the chamber 302 and is discharged, and the ultra-light matter such as a vinyl film is formed to fall from the chamber 303 and be discharged through the conveyors 301a, 302a, and 303a.

The light matters discharged as described above (PP, PE, PS part, PVC, cans) are formed to be transferred to the second magnetic separator.

The second magnetic separator is picked up by throwing the aluminum can of the cans by the vortex of the magnetic field generated by the rotation of the magnetic drum connected to the belt at high speed, and the ferrous metal can is attached at the magnetic field and dropped at the magnetic loss region. It is configured to be sorted by.

The waste sorted to the cans while passing through the second magnetic separator is left with only mixed plastics (PP, PE, PS, and PVC).

In order to separate the PVC from the mixed plastic is formed to crush the mixed plastic through the mill 22.

In the process of crushing through the grinder 22 as described above, the mixed plastic pulverized to a predetermined size (3 to 10 mm) is transferred to the wet specific gravity difference sorting device 23 using the screw conveyor 501.

In the water tank 24 of the wet specific gravity difference screening apparatus 23, the partition 34 is formed in the center, and the 1st compartment 401 and the 2nd compartment 402 are formed in the partition 34 both sides.

The rotating shaft 403 is formed to rotate over the first compartment 401 and the second compartment 402 of the water tank 24, and the stirring furnace 404 is formed on the rotating shaft 403 of the first compartment 401. Is formed.

The mixed plastics and water are introduced into the first compartment 401 of the water tank 24, and the mixed plastics are mixed and agitated by the stirring furnace 404 of the first compartment 401. The plastics to be supported are formed to flow into the second compartment 402.

An outlet 405a is formed below the first compartment 401.

An outlet 405b is formed above the second compartment 402.

When water is accommodated in the first compartment 401 and the second compartment 402 and mixed plastics are introduced into the first compartment 401 and the stirring furnace 404 is operated, the introduced mixed plastics are dispersed and the specific gravity of the plastic is dispersed. The plastics (PP, PE, PS) that are arranged vertically according to the type of plastic, and the specific gravity is lowered and is floated on the water are moved to the second compartment 402 together with the overflowing water to discharge the upper outlet of the second compartment 402 ( Plastic (PVC) discharged to 405b and having a high specific gravity is settled and discharged to the outlet 405b below the first compartment 401.

As described above, the recycled plastics (PP, PE, PS) and the mixed plastics (PP, PS, PE, PVC) discharged to the respective discharge ports 405a and 405b are formed to be dewatered by the dehydration apparatus 25a and 25b. .

The dehydrated mixed plastics (PP, PS, PE, PVC) are transferred to a drying device (26).

Mixed plastics (PP, PE, PS and some of the PVC) transferred from the dehydration device (25a, 25b) to the drying device 26 is transferred to the closed pipe 701 by the wind power of the blower (32a).

At room temperature air is introduced into the drying box 27 of the drying apparatus 26 in which the mixed plastics (PP, PE, PS and a part of the PVC) is accommodated, and a part of the mixed plastics (PP, PE, PS and , PVC, etc.) to help dry by stirring the wind and the stirring furnace 801 at room temperature flowing from the blower 32b installed outside the drying box 27.

Wind power flowing from the blower (32b) is formed to dry with the wind is injected into a plurality of holes (not shown) formed in a plurality of pipes 601 arranged on the bottom of the drying box 27, without disturbing the wind blowing It is formed to dry quickly.

Mixed plastics (part of PP, PE, PS and part of PVC) dried in the drying device 26 are transferred to the electrostatic separator 28 by the wind power of the blower 32c to the closed pipe 702.

The electrostatic separator 28 is provided with a sealed chamber 16f, and the mixed plastics (PP, PE, PS and a part of PVC, and a part of PVC) which are introduced on the chamber 16f by vibrating each mixed plastics. And a diaphragm 31 is formed between the plastics to form static electricity, and the mixed plastics (parts of PP, PE, PS, and part of PVC) of the static charged state discharged by the vibration of the diaphragm 31 are chambers. While passing through the negative electrode plate 29b and the positive electrode plate 29a in 16f, the PVC moves toward the positive electrode plate 29a in the direction of PP, PS, and PE toward the negative electrode plate 29b, so that the PVC receives the PP, PS and PE are discharged into the container 20f, respectively, and mixed plastics (PP, PE, PS and some PVC) which do not act on the electrode plates 29a and 29b are discharged into the separate container 20h. do.

Example

Selecting mixed plastics (PET, PP, PE, PS, PVC, etc.) from conventional household waste and recycling PET, PP, PE, PS, but not from mixed plastics (PET, PP, PE, PS, PVC, etc.) PET, PP, PE, PS can not be completely screened by type, there is a problem that there is a limit to the use of mixed plastics and also limited to recycling.

The present invention is to provide a method for maximally sorting PVC from mixed plastics (PET, PP, PE, PS, PVC, etc.) in order to completely recycle the resources of the waste plastics as described above.

In the present invention, the power is operated in each device, when the garbage is introduced into the volley sorter 11 using the conveyor 101, the volley plate 12 is volley in the inclined state, foreign matter (soil, sand Etc.) are discharged through the hole (not shown) under the ballistic plate 12, and most heavy materials (solid plastics) and light materials (cans) are discharged and moved under the ballistic plate, and most films are also shown in FIG. As shown in FIG. 2, the gas is discharged through the volley plate 12.

The household waste not sorted by the volley sorter 11 passes through the water sorting table 13 through the conveyor 101.

In the sorting unit 13, the wastes transported to the conveyor 101 are manually discharged by sorting out the waste that is difficult to automatically sort out solid plastics, fibers, cloth, etc. among the wastes.

The waste passed through the water sorting table 13 is moved to the chamber 16a of the first magnetic separator 14.

In the chamber 16a of the first magnetic separator 14, two magnet rolls 201 and 202 are formed to rotate in association with the belt 203 to form a magnetic force and to continuously tension the belt 203. Two auxiliary rolls 201a and 201b are configured, and the rolls 201, 202, 201a and 201b are attached to the belt 203 and the iron can 204 of the garbage transported on the belt 203.

The iron can 204 attached to the belt 203 and moved as described above is attached to the belt 203 because the magnetic force is lost when the magnetic force is lost, that is, when the belt 203 passes through the roll 202. The iron can 204, etc., which have been dropped, are discharged by falling of the iron can 204 at a point passing through the rear roll 202.

Garbage from which household garbage passes through the above sorting devices, and has collected sediment, sand, film, solid plastic, fiber, ferrous metal can 204, and aluminum can, is selected by using a conveyor 102. 17a) is transferred to the chamber 16b which senses and sorts only PET.

The waste conveying conveyor 103 enters into the chamber 16b, a near-infrared sensor 17a is formed on the ceiling of the conveying conveyor 103, and an air injector 15a is disposed below the end of the conveying conveyor 103. And an opening 30a is formed in the upper wall of the chamber 16b opposite the conveyor, and when the waste flows into the chamber 16b, the near-infrared sensor 17a senses only the PET among the waste, and the sensed PET is the conveyor 103. At the moment of falling through the air), the air is blown off by the air injection of the injector 15a, and is loaded into the container 20a through the opening 30a.

The waste in which PET has been sorted is transferred to the transport conveyor 104 under the chamber 16b.

The PET sorted waste is sensor 17b formed in the chamber 16c senses only PP and loads only the PP through the opening 30b to receive in the container 20b, and the waste sorted PP is disposed below the chamber 16c. In the same way as the PET is sorted and conveyed to the conveyor 105, the PP sorted waste is sensed only by the PS by the sensor 17c formed in the chamber 16d in the same manner as described above. PS passing through the opening 30c is loaded in the receiving box 20c, and the PS-selected waste passes through the chamber 16e, while the sensor 17d formed in the chamber 16e senses only the PE. The collected PE is loaded into the container 20d through the opening 30d, and the waste in which the PE is sorted is transferred below the chamber 16e.

In the near-infrared screening process, most of the PET formed as a container is almost selected in characteristics.

As described above, all of the PET and most of the PP, PS and PE are selected in the near-infrared screening process, but some of the non-selected PP, PS and PE and all of the PVC, some of the solid plastics, some of the cans, and some of the film are windscreened. Transferred to the device 19.

The wind power sorting device 19 improves the applicant's right to patent No. 10-747655 (recycled waste sorting device using wind power) to configure a plurality of chambers (301, 302, 303) and the arrangement of a plurality of wind power It is an improvement that the uniform wind power reaches the end of the waste sorting process.

The wind sorting device 19 is to scatter each waste by the wind to sort according to the scattering distance.

In other words, when the wind is scattered while maintaining the uniform air flow to the end, the heavy waste is close to the light trash is far away accurately.

Garbage that has passed the near-infrared screening process is transported to the wind sorting device 19, where small-sized wastes such as soil and sand are discharged, and heavy materials (solid plastics, etc.) are near by the wind. Part of PS, PE, PVC) and cans} are used in the distant place, and ultra light materials (film, etc.) are scattered farther away.

The mixed plastics discharged from the wind power sorting device 19 are transferred to the second magnetic separator 35.

When the two magnetic rolls 304 connected to the belt are rotated at a high speed, the second magnetic separator 35 forms a vortex in the magnetic field so that the non-ferrous metal is buckled. The ferrous metal can 204 is attached to the belt 306 by magnetic force, rotates, and then drops and is discharged from the portion where the magnetic force is lost, and the mixed plastics are transferred to the grinder 22.

The mixed plastics transferred to the grinder 22 are pulverized into small particles (3-10 mm or less).

The pulverized mixed plastics are transferred to the water tank 24 of the specific gravity sorting device 23 using the screw conveyor 501.

The specific gravity wet screening apparatus 23 is constructed by improving the applicant's patent No. 10-0904303 (a waste plastic wet screening method using a specific weight difference).

The stirring furnace 404 is installed in the rotation shaft 403 of the first compartment 401 of the water tank 24, and the mixed plastics are dispersed while the plastic of the first compartment 401 is stirred by the stirring furnace 403. Follow the statue in the water. The low specific gravity plastics floated on the water surface in the arranged and arranged in a floating state were discharged by moving from the first compartment 401 to the second compartment 402 together with water.

As described above, the PVC of the mixed plastics, which are stirred in the first compartment 401 of the water tank 24, is precipitated under the first compartment 401 to an outlet 405a located below the first compartment 401. The recycled plastics PS, PP, and PE of the second compartment 402 are discharged to the discharge hole 405b formed on the second compartment 402.

order Kinds importance Remarks One PET 0.89-0.92    . 2 PP 0.88-0.9 " 3 PS 0.9-0.93 " 4 PE 0.8-0.83 " 5 PVC 1.35-1.45 "

  TABLE-1

For reference, as shown in Table 1, PET, PP, PS, PE can be seen that the specific gravity is less than 1, it can be seen that only PVC 1 or more.

As described above, since only the specific gravity of PVC is 1 or more, it can be seen that it is easily separated because it is arranged at the bottom in the water of the specific gravity screening device.

As described above, most of the PVC is discharged from the first compartment, but because a small amount of PP, PS, and PE are mixed, the selected PVC is mixed with a small amount of PP, PS, and PE to form mixed plastics.

The present invention dehydrates the mixed plastics (a small amount of PP, PS, PE and PVC) wet with water in order to separate the PVC to the maximum in the mixed plastic as described above.

The dehydrated mixed plastics are transferred to a drying apparatus 26 by using wind power and a closed tube 701 of the blower 32a and dried.

In the drying box 27 in which the mixed plastics of the drying device 26 are accommodated, a plurality of injection pipes 601 in which wind at room temperature is injected is embedded, so that the wind power of the blower 32b installed outside the drying box 27 is It is provided inside the drying box 27 through the injection pipe 601 and can be dried, and quickly dried by the operation of the stirring furnace 801, dust generated by the wind and the stirring furnace is collected by the cyclone 802. do.

As described above, the mixed plastic dried in the drying device 26 is transferred to the electrostatic separator 28 using the closed tube 702 equipped with the blower 32c.

The electrostatic separator 28 is above as shown in FIG. The chamber 16f which penetrated down is formed, and is left inside chamber 16f. The negative plate 29a and the positive plate 29b are connected to a power source to form a negative potential and a positive potential. A mixing plate 31 is formed on the chamber 16f and flows through the closed tube 702. The vibration of the diaphragm 31 causes electrostatic charge.

As the electrostatically mixed plastic is introduced into the chamber 16f and passed through the electrode plates 29a and 29b as described above, the negatively charged PVC falls while moving toward the positive electrode plate 29b and is positively charged. PP, PS, PE are dropped while moving to the negative electrode plate (29a). PE. PS and PVC will be separated and discharged.

When the mixed plastics are outside the influence of negative or positive charges, PVC and PP, PS, and PE fall separately in a mixed state, and electrode plates to separate a small amount of PVC and a small amount of PP, PS and PE to the maximum. (29a, 29b) phase. You can adjust the amount of separation by adjusting the angle.

The dust generated by the diaphragm 31 is collected by the cyclone 803, so that the mixed plastics (PET, PP, PS, PE) in which 95% of the PVC is separated in the recycling waste sorting method of the present invention can be selected. In addition, it provides a sorting method for sorting under a clean environment.

1 is a process diagram of the present invention

2 is an operation of the process according to the present invention

Figure 3 is a partial detail of the first half of the process chart according to the present invention

4 is a partial late detail of the process diagram according to the present invention;

5 is a detailed view of the magnetic separator

6 is a detailed view of the sorter by near infrared sensing

7 is a detailed view of the magnetic vortex separator

8 is a detailed view of the electrostatic separator

** Description of the symbols for the main parts of the drawings **

11: Bali Selector 12: Balipan

13: repair unit 14: 1st magnetic separator

15: injector (a, b, c, d) 16: chamber (a, b, c, d, e, f)

17: sensor (a, b, c, d) 18: near infrared sensor selector (a, b, c, d)

19: Wind sorting device 20: Box (a, b, c, d, e, f, g, h)

21: compressed discharge device 22: grinding device

23: wet screening device 24: water tank

25: dehydration device 26: drying device

27: dry 28: electrostatic screening device

29 electrode plates a and b 31 diaphragm

32: blower (a, b, c) 33: blower (a, b, c)

34: partition 35: second magnetic separator

Claims (10)

The process of sorting film, soil, sand, etc. using a Bali sorting machine, Process of sorting glass bottles, fibers, and solid plastics; Screening ferrous metal cans while passing through a first magnetic separator; The process of sorting only PET while passing the first magnetic separator through a chamber of the near infrared sorting device in which the near infrared sensor for sensing PET is formed; The process of sorting only PP while passing through the chamber in which the waste transported to the chamber is formed with a near-infrared sensor sensing only PP; The waste transported to the chamber passes through the chamber in which the near-infrared sensor sensing only the PS is sorted, and the PS is sorted; Selecting only PE while passing through a chamber in which a near-infrared sensor sensing only PE transferred to the chamber is formed; Wastes sorted from PET, PP, PS, and PE pass through the wind sorting device, with foreign materials (residue soil, sand, etc.), heavy materials (solid plastics), and lightweight materials (parts of mixed plastics (PE, PP, PS , PVC, cans} and ultra-light weight (film, etc.) are scattered by the wind and are separated and discharged according to the weight by weight, and light weights {parts of mixed plastics (PE, PP, PS, PVC, cans) } Screening process, Separating the mixed plastics and cans (ferrous metal cans, aluminum cans) by transferring the light weight to a second magnetic separator; Crushing the mixed plastics discharged from the second magnetic separator (PE, PP, PS and PVC); Sorting the crushed mixed plastics (PE, PP, PS, and PV) into PE, PP, PS, PVC by the difference in specific gravity of each plastic in the water of the wet gravity screening device; Dehydrating plastics (PE, PP, PS) and mixed plastics (a small amount of PE, PP, PS and PVC) selected by the difference in specific gravity; Drying the dehydrated plastics and mixed plastics, Recyclable plastic sorting method characterized in that the sorted plastics can be recycled through the process of maximizing the PE, PP, PS and PVC from the dried plastics and mixed plastics in the electrostatic separator. The method of sorting plastic according to claim 1, wherein the film, fibers, cans, and heavy materials are sorted by the volley of the volley separator in the up or down direction of the volley separator. The method of claim 1, wherein the first magnetic separator is configured to separate the ferrous metal cans separately. The method of claim 1, wherein the near-infrared sorter is configured to sense one of the plastic (PET, PP, PS, PE) so that when passing through the chamber in which PET is sensed, only PET is selected, PP in the same way Only PP is sorted when passing through the chamber, PS is sorted when passing through the chamber where PS is sensed, only PE is sorted when passing through the chamber where PE is sensed, and the air is sensed at the same time as each plastic is sensed. Recycling plastic sorting method characterized in that the injection is carried out is configured to be separated by the air blowing force. The wind turbine according to claim 1, wherein the chamber of the wind sorting device is composed of several compartments, and each of the chambers is provided with a blower for providing wind power by the blower, so that the same wind power can be provided to the garbage scattered by the wind until the end and fall according to the net weight. Recycling plastic sorting method, characterized in that configured to. The method of claim 1, wherein the second magnetic separator is formed so that the electromagnet rolls connected by the belt can be separated from the aluminum can by the vortex of the magnetic field formed by rotation at high speed. The mixing tank of claim 1, wherein the water tank of the wet gravity screening device is composed of first and second compartments, water is received in the first compartment, and a stirring furnace is formed to stir the mixed plastic with water. It is configured to arrange specific gravity and phase in water. The plastics (PP, PS, PE) having the smallest specific gravity of the mixed plastics arranged below are transferred to the second compartment together with the overflowing water of the first compartment and discharged to the outlet formed in the upper part of the second compartment. Awards by specific gravity. And the heaviest PVC which is arranged below and positioned after the first compartment is discharged to an outlet formed under the first compartment. According to claim 1, wherein the drying process is agitated by a stirring furnace formed in the drying of the drying process is configured to dry by the wind at room temperature flowing into the air injection pipe and the dust generated by the wind and agitation will be collected through a cyclone Recycling plastic sorting method, characterized in that configured to be. The method of claim 1, wherein the dried mixed plastic is configured to be transported through a closed tube to the wind power of the blower to prevent dust emission. The method of claim 1, wherein the electrostatic separator is installed in the chamber and when the mixed plastic flowing into the chamber enters the vibrating diaphragm to form an electrostatic state by vibrating and passes through the positive plate and the silver plate, the plastic (PP, PS, PE) ) Is a negative electrode plate and PVC is separated while moving to the positive plate to separate the PVC from the mixed plastics of household garbage.

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