KR102561609B1 - Recycling process for wasted fish net with separating apparatus using specific gravity difference - Google Patents

Abstract

The present invention relates to a waste fishing net treatment process including a specific gravity separator, and more particularly, to separate the waste fishing net into a high specific gravity material and a low specific gravity material by using the difference in specific gravity to separate the waste fishing net into a recycling form. It relates to a manufacturing waste fishing net treatment process.
By means of solving the above problems, the present invention can easily separate waste fishing nets into high specific gravity materials and low specific gravity materials using a specific gravity liquid to increase the efficiency of wet specific gravity separation compared to the conventional method, and to manufacture waste fishing nets in the form of pellets that can be recycled. there is.

Description

Waste fishing net treatment process including a specific gravity separator {RECYCLING PROCESS FOR WASTED FISH NET WITH SEPARATING APPARATUS USING SPECIFIC GRAVITY DIFFERENCE}

The present invention relates to a waste fishing net treatment process including a specific gravity separator, and more particularly, to separate the waste fishing net into a high specific gravity material and a low specific gravity material by using the difference in specific gravity to separate the waste fishing net into a recycling form. It relates to a manufacturing waste fishing net treatment process.

The first international norm to protect the marine environment from marine debris is the London Convention, which came into effect in 1975, and discussions on responding to marine debris have continued. As they pledge to reduce waste, discussions are becoming more active.

In July of last year, the G20 including Korea agreed on the ‘G20 Action Plan on Marine Litter’, which contains 7 policies and 41 tasks to be implemented to respond to the marine litter problem.

It is estimated that 131,000 tons of fishing gear (nets, fishing nets, etc.) are used annually in coastal fisheries and fish farms in Korea, and about 43,800 tons of fishing gear are discarded. Abandoned fishing nets cause problems such as damage to aquatic life caused by ghost fishing, ship operation failure, damage to the undersea ecosystem and habitat, and generation of microplastics, so urgent management is required.

In general, when fishing nets are damaged and cannot be used, they are discarded in the sea, and as this practice continues for decades, the discarded fishing nets gradually accumulate near fishing grounds, causing environmental damage. The specific harms caused by waste fishing gear, including waste fishing nets, are: First, since waste fishing nets are not degradable, they are deposited in their original form without disintegration. Second, it interferes with the spawning and habitat of fish and shellfish, third, it causes marine accidents, and fourth, metal weights attached to fishing nets are made of heavy metals such as lead, which increases marine pollution.

Therefore, the present invention is intended to separate waste fishing nets and ultimately manufacture them in a recyclable form, and to develop a wet fishing net specific gravity separation device that separates waste fishing nets using a difference in specific gravity.

Korean Patent Registration No. 10-1130461

The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to collect and cut waste fishing nets using a specific gravity difference to include low specific gravity materials including PA6, PP and PE, PET and weights. It is to provide a waste fishing net treatment process including a waste net wet gravity separation device for separating high specific gravity materials.

The technical problems to be solved by the invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The waste fishing net treatment process including the specific gravity separator according to the present invention,

A preliminary sorting step of collecting waste fishing nets and separating waste fishing gear and non-ferrous metals introduced together from the collected waste fishing nets;

A cutting step of inserting the pre-selected waste fishing net into a cutting machine to produce a cut waste fishing net;

A ferrous metal removal step of separating the ferrous metal by introducing the cut and closed fishing net into a ferrous metal remover;

A primary pulverization step of producing a pulverized waste fishing net by inputting the cut waste fishing net from which the ferrous metal is separated into a primary pulverizer;

A dry cleaning step of removing foreign substances from the pulverized waste fishing net by putting the pulverized waste fishing net into a dry washer;

A friction washing step of putting the dry-cleaned pulverized waste fishing net into a friction washing machine to remove foreign substances in a wet manner;

A secondary pulverization step of producing waste fishnet particles by introducing the friction-washed pulverized waste fishing net into a secondary pulverizer;

A first specific gravity separation step of inputting the secondly pulverized waste fishnet particles into a specific gravity separator to separate a first high specific gravity material and a first low specific gravity material and recovering the first high specific gravity material;

A second specific gravity separation step of separating and recovering the first low specific gravity substance into a second high specific gravity substance and a second low specific gravity substance by introducing the first low specific gravity substance into a specific gravity separator;

A first drying step of dehydrating the second high specific gravity material and the second low specific gravity material by respectively inputting them into a dehydrator;

A secondary drying step of removing residual moisture by introducing the second high specific gravity material and the second low specific gravity material that have undergone the primary drying into a hot air dryer, respectively;

A pellet manufacturing step of producing recycled pellets by respectively inputting the second high specific gravity material and the second low specific gravity material subjected to the secondary drying into a pellet maker,

The first high specific gravity materials recovered in the first specific gravity separation step are PET (Polyethylene terephthalate) and non-ferrous metals, and the first low specific gravity materials are PP (Polypropylene), PE (Polyethylene) and PA6 (Nylon 6),

The second high specific gravity material recovered in the secondary specific gravity separation step is PA6 (Nylon 6), and the second low specific gravity material is characterized in that PP (Polypropylene) and PE (Polyethylene).

By means of solving the above problems, the present invention can easily separate waste fishing nets into high specific gravity materials and low specific gravity materials using a specific gravity liquid to increase the efficiency of wet specific gravity separation compared to the conventional method, and to manufacture waste fishing nets in the form of pellets that can be recycled. there is.

1 is a flow chart showing a waste fishing net treatment process including a specific gravity separator according to an embodiment of the present invention.
Figure 2 is a side view specifically showing the specific gravity separator used in the first gravity separation and the second gravity separation steps according to an embodiment of the present invention.
3 is a side view (a) and a front view (b) of a water tank in the specific gravity separator used in the first specific gravity separation and the second specific gravity separation steps according to an embodiment of the present invention.
Figure 4 is a view specifically showing the specific gravity liquid control unit in the specific gravity separator used in the first specific gravity separation and the second specific gravity separation steps according to an embodiment of the present invention.
5 is a diagram illustrating the principle of a specific gravity separator according to an embodiment of the present invention.

The terms used in this specification will be briefly described, and the present invention will be described in detail.

The terms used in the present invention have been selected from general terms that are currently widely used as much as possible while considering the functions in the present invention, but these may vary depending on the intention of a person skilled in the art or precedent, the emergence of new technologies, and the like. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, not simply the name of the term.

In the entire specification, when a part is said to "include" a certain component, it means that it may further include other components, not excluding other components unless otherwise stated.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The specific details, including the problem to be solved, the means for solving the problem, and the effect of the invention with respect to the present invention are included in the embodiments and drawings to be described below. Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The waste fishing net treatment process including the specific gravity separator according to the present invention is characterized in that it is performed by the following steps as in FIG.

First, the first step (S10) is a pre-selection step. In the first step (S10), the waste fishing nets are collected, and waste fishing gear and non-ferrous metals introduced together are separated from the collected waste fishing nets.

More specifically, through the pre-selection step, waste fishing gear made of ferrous metal and fishing net weight made of non-ferrous metal such as lead, introduced together with the waste fishing net, are separated from the collected waste fishing net.

Next, the second step (S20) is a cutting step. In the second step (S20), the pre-selected waste fishing net is put into a cutting machine to produce a cut fishing net.

More specifically, the cutting step is a preprocessing step for primary crushing performed in the fourth step (S40) below, and it is preferable to put it into the cutting machine and cut it to 100 mm or less. When the cut and closed fishing net is cut beyond 100 mm, it is preferable to carry out the above conditions because it may be difficult to separate the ferrous metal in the third step (S30) below.

Next, the third step (S30) is a ferrous metal removal step. In the third step (S30), the ferrous metal is separated by introducing the cut and closed fishing net into a ferrous metal remover.

More specifically, in the ferrous metal removal step, waste fishing gear made of ferrous metal that has not been separated in the pre-sorting step of the first step (S10) is removed.

Here, the ferrous metal removal unit is preferably composed of a first conveyor, a second conveyor, and a storage container.

The first conveyor transports the cut and closed fishing net cut through the cutter.

Preferably, the second conveyor includes a permanent magnet or an electromagnet installed above the first conveyor to remove ferrous metal included in the cut and closed fishing net.

The storage container stores the ferrous metal material removed by the second conveyor.

Next, the fourth step (S40) is the first crushing step. In the fourth step (S40), the cut waste fishing net from which the ferrous metal is separated is inputted into a primary crusher to produce a crushed waste fishing net.

More specifically, the primary grinding step is a pretreatment step for carrying out the secondary grinding step performed in the sixth step (S60) below, and it is preferable to put it into the primary grinder and grind it to 50 mm or less. If the grinding exceeds 50 mm in the first grinding step, the surface area is large in the dry cleaning performed in the fifth step (S50) below, so it is preferable to carry out under the above conditions.

Here, the primary crusher preferably includes a body and a crushing roll.

The body portion includes an input hopper into which the cut and closed fishing net from which ferrous metal is removed through the ferrous metal removal step is inputted.

The crushing roll is provided horizontally inside the main body and simultaneously crushes the introduced waste fishing net while rotating. The pulverized waste fishing nets that are pulverized and discharged by the pulverizing rolls preferably include a perforated plate having a mesh size of 50 mm or less to discharge 50 mm or less in size.

Next, the fifth step (S50) is a dry cleaning step. In the fifth step (S50), the primarily pulverized pulverized waste fishing net is put into a dry washing machine to remove foreign substances from the pulverized waste fishing net.

More specifically, in the dry cleaning step, foreign substances such as sand and shells of fish and shellfish and salt are removed from the pulverized waste fishing net by using blow blades.

Here, the dry washing machine includes a main body, a screw, a perforated blade, a perforated filter, and a storage container.

The main body includes an input hopper into which the pulverized waste fishing net is input.

The screw is provided horizontally inside the main body and simultaneously transports the introduced pulverized waste fishing net to the discharge port while rotating.

The striking wing is attached to the screw and strikes the pulverized waste fishing net to remove foreign substances.

The perforated filter filters out foreign substances dropped by the striking blades.

The storage container stores foreign substances eliminated by the perforated filter.

Next, the sixth step (S60) is a friction cleaning step. In the sixth step (S60), the dry-cleaned pulverized waste fishing net is put into a friction washer to remove foreign substances in a wet method.

More specifically, in the friction washing step, residual foreign substances and salt are removed by wet-drying the pulverized waste fishing net from which foreign substances and salt are partially removed through the dry washing step.

Here, the friction washer is composed of a main body, a spray nozzle, a screw, a perforated filter, and a nozzle.

The main body includes an input hopper into which the pulverized waste fishing net partially washed through the dry washing process is put.

The injection nozzle injects washing water into the main body to remove residual foreign substances and salt from the pulverized waste fishing net.

The screw is installed horizontally inside the main body and transports the pulverized waste fishing net put into the discharge port during rotation and communication.

The perforated filter is provided in plurality, and is attached to the screw to hit the pulverized waste fishing net to remove residual foreign substances and salt.

The nozzle is provided at the lower end of the washing machine body to discharge residual foreign substances and salt removed along with the washing water by the perforated filter.

Next, the seventh step (S70) is a secondary crushing step. In the seventh step (S70), the friction-washed pulverized waste fishing net is put into a secondary pulverizer to produce waste fishing net particles.

More specifically, in the secondary pulverization step, the pulverized waste fishing nets from which residual impurities and salts have been removed by friction washing are put into a secondary pulverizer and pulverized to a size of 30 mm or less to prepare waste fish net particles.

Here, the secondary crusher preferably includes a body and a crushing roll similarly to the primary crusher.

The body part includes an input hopper into which the pulverized waste fishing net washed through the friction washing step is put.

The crushing roll is provided horizontally inside the main body and simultaneously crushes the introduced waste fishing net while rotating. The pulverized waste fishing nets that are pulverized and discharged by the pulverizing rolls preferably include a perforated plate having a mesh size of 30 mm or less to discharge 30 mm or less in size.

Next, the eighth step (S80) is the first specific gravity separation step. In the eighth step (S80), the secondly pulverized waste fishing net particles are put into a specific gravity separator to separate them into a first high specific gravity material and a first low specific gravity material, and the first high specific gravity material is recovered.

More specifically, the first specific gravity separation step is separated using a first specific gravity separator, and the first high specific gravity material recovered in the first specific gravity separation step is PET (Polyethylene terephthalate) and non-ferrous metal, and the first bottom The specific materials are characterized by PP (Polypropylene), PE (Polyethylene) and PA6 (Nylon 6).

Next, the ninth step (S90) is the second specific gravity separation step. In the ninth step (S90), the first low specific gravity material is put into a specific gravity separator to separate and recover the second high specific gravity material and the second low specific gravity material.

More specifically, the second specific gravity separation step is separated using a second specific gravity separator, the second high specific gravity material recovered in the second specific gravity separation step is PA6 (Nylon 6), and the second low specific gravity material is characterized in that it is PP (Polypropylene) and PE (Polyethylene).

Here, the specific gravity separator, as shown in FIG. 2, by providing the same two primary gravity separator and secondary gravity separator side by side, the primary gravity separation step (S80) and the secondary gravity separation step (S90) It is characterized by performing successively.

The specific gravity separator separates materials using the difference in specific gravity of the materials. In the prior art, manpower was used to manually separate nylon or the like from the waste fishing net. As shown in Table 1 and FIG. 5, the specific gravity separator according to the present invention separates using the difference in specific gravity of the material.

matter Specific Gravity (g/cm) 1st specific gravity separator 1st specific gravity liquid 1.2 2nd specific gravity separator 2nd specific gravity liquid 1.0 PA6 1.12 to 1.14 PP 0.89 to 0.92 PE 0.95 to 0.96 PET 1.37 to 1.45 LEAD 11.34

As shown in FIG. 5, the specific gravity of the first specific gravity liquid is 1.2 g / cm 3, based on the specific gravity of the first high specific gravity liquid, PET (Polyethylene terephthalate), a nonferrous metal, and the first low specific gravity It is separated into the materials PP (Polypropylene), PE (Polyethylene) and PA6 (Nylon 6). In addition, PP (Polypropylene), PE (Polyethylene), and PA6 (Nylon 6), which are the first low specific gravity materials, are introduced into the second specific gravity separator and have a specific gravity of 1.0 g/cm 3 of the second specific gravity liquid. It is separated into PA6 (Nylon 6), a heavy material, and PP (Polypropylene) and PE (Polyethylene), which are the second low specific gravity materials.

Here, the first specific gravity liquid is an aqueous sodium chloride solution, and the second specific gravity liquid is preferably industrial water.

As shown in FIGS. 2 to 4 , the primary specific gravity separator and the secondary specific gravity separator are composed of a fishing net input unit 100, a water tank unit 200, and a specific gravity liquid control unit 300.

First, the fishing net inserting unit 100 receives the input pulverized waste fishing net and moves it downward while agitating it. If necessary, the fishing net input unit 100 may additionally provide an input hopper, an input stirrer, and an input paddle (drawing not shown).

The input hopper is provided as a container in the form of a funnel to move the waste fishing net to the lower end, and if necessary, a device for discharging the contents by opening a funnel-shaped outlet attached to the bottom may be provided.

The input stirrer is provided at the bottom of the input hopper and transfers the input waste fishing net to the bottom while stirring.

The input paddles are provided at the lower end of the input agitator and transfer the transported waste fishing net to the water tank unit 200.

Next, the water tank part 200 is provided as a body part having a hollow structure to accommodate the waste fishing net and the specific gravity liquid introduced from the fishing net input part 100, and the first water tank part 210 and the second water tank part 220 prepared respectively with The water tank unit 200 is composed of transfer paddles 211 and 221, inclined plates 212 and 222, low specific gravity material discharge units 213 and 223, and high specific gravity material discharge units 214 and 224.

The body of the water tank 200 is formed in an upper and lower narrow shape to facilitate recovery of the specific gravity liquid and the high specific gravity substance, and the upper portion is open to position the transfer paddles 211 and 221. The transfer paddles 211 and 221 are preferably provided in plurality to perform the role of agitating, providing pressure and transferring the pulverized waste fishing net introduced into the water tank unit 200, and as shown in FIG. 2, the It is preferable that the size of the paddle is smaller as it goes from the fishing net input unit 100 to the low specific gravity material discharge units 213 and 223. That is, as it is closer to the fishing net input unit 100, the introduced pulverized waste fishing net is stirred and pressure is provided to submerge the high nasal material under the water tank unit 200, and the low specific gravity material discharge unit 213, 223 As it goes up, it plays a role in transporting low-density substances. Therefore, the size of the paddle is prepared to be smaller as it goes from the fishing net input unit 100 to the low specific gravity material discharge units 213 and 223 to facilitate its role.

In addition, inclined plates 212 and 222 are provided so that the lower end of the body of the water tank 200 has an upper and lower narrow shape. The inclined plates 212 and 222 serve to collect materials with high specific gravity that are heavier than the specific gravity liquid among the pulverized waste fishing nets precipitated by the transfer paddles 211 and 221 to the lower part of the water tank part 200. The inclined plates 212 and 222 are attached to one side of the lower part of the water tank part 200, but are provided at an angle of 40 to 50 °, so that the specific gravity liquid and the high specific gravity substance can be easily recovered by the formed angle.

The first high specific gravity material (PET, nonferrous metal) separated from the first water tank unit 210 is discharged by the first high specific gravity material discharge unit 214, and the first low specific gravity material PA6, PP, PE) is separated by the first low specific gravity material discharge unit 213 and introduced into the second tank unit 220 by the second fishing net input unit 120.

Next, the specific gravity liquid control unit 300 is provided on one side of the tank unit 200, and as shown in FIG. 4, the specific gravity measurement sensor 310, the first specific gravity liquid tank unit 320, and the first specific gravity liquid It consists of a transfer pump 330, a second specific gravity liquid tank unit 340 and a second specific gravity liquid transfer pump 350.

The specific gravity liquid control unit detects the specific gravity of the specific gravity liquid. The transfer pump compares the detected specific gravity value and the set specific gravity value to add or remove the specific gravity liquid, and a first specific gravity liquid transfer pump 330 and a second specific gravity liquid transfer pump 350 are provided . The specific gravity liquid stored in the first specific gravity liquid tank part 320 and the second specific gravity liquid tank part 340 is added or removed by the first specific gravity liquid transfer pump 330 and the second specific gravity liquid transfer pump 350.

More specifically, the specific gravity sensor 310 is provided on one side of the water tank 200 to detect the specific gravity of the specific gravity liquid, and in one embodiment, the specific gravity value set when measuring the specific gravity of the first specific gravity liquid If the phosphorus exceeds 1.2 g/cm, the specific gravity value is maintained by adjusting the first specific gravity liquid transfer pump 330 to add or remove the sodium chloride aqueous solution from the first specific gravity liquid tank 320.

In addition, when the specific gravity of the second specific gravity liquid detected by the specific gravity measurement sensor 310 is out of 1.0 g / cm 3, the second specific gravity liquid transfer pump 350 is adjusted to the second specific gravity liquid tank unit In 340, the industrial water is added or removed to maintain the set specific gravity.

Next, the tenth step (S100) is a primary drying step. In the tenth step (S100), the second high specific gravity material and the second low specific gravity material are respectively put into a dehydrator and dehydrated.

More specifically, in the primary drying step, the second high specific gravity material, PA6 (Nylon 6) and the second low specific gravity material, PP (Polypropylene) and PE (Polyethylene) recovered in the secondary specific gravity separation step, respectively. It is put into a dehydrator to remove moisture first.

Here, the dehydrator preferably includes a dehydrator main body, a dehydrator screw, and a mesh filter.

The dehydration main body includes an input hopper into which PA6, PP, and PE separated through the second specific gravity separation step are respectively input.

The dehydrator screw is installed horizontally inside the dehydrator main body and rotates to transfer the input PA6, PP, and PE toward the discharge port.

The mesh filter is installed outside the dehydrator screw to remove some of the moisture by compressing PA6, PP, and PE that are transported.

Next, the eleventh step (S110) is a secondary drying step. In the eleventh step (S110), the second high specific gravity material and the second low specific gravity material that have undergone the primary drying are respectively put into a hot air dryer to remove residual moisture.

More specifically, in the secondary drying step, the second high specific gravity material PA6 (Nylon 6) and the second low specific gravity material PP (Polypropylene) and PE (Polyethylene) dried in the primary drying step are heated with hot air, respectively. It is put in a dryer to remove residual moisture.

Here, the hot air dryer is composed of a drying main body, an agitator, and a hot air supply unit.

The drying main body includes an input hopper into which the PA6, PP, and PE, from which moisture is partially removed through the primary drying step, are respectively input.

The stirrer is installed horizontally inside the drying main body and rotates while simultaneously stirring the input PA6, PP, and PE.

The hot air supply unit supplies hot air of 100° C. or higher to the inside of the drying main body.

Next, the twelfth step (S120) is a pellet manufacturing step. In the twelfth step (S120), the second high specific gravity material and the second low specific gravity material subjected to the secondary drying are respectively input into a pellet maker to make recycled pellets.

According to one embodiment of the present invention, it is preferable to include a water treatment facility that recycles and reuses the specific gravity liquid and water used in the present invention.

By means of solving the above problems, the present invention can easily separate waste fishing nets into high specific gravity materials and low specific gravity materials using a specific gravity liquid to increase the efficiency of wet specific gravity separation compared to the conventional method, and to manufacture waste fishing nets in the form of pellets that can be recycled. there is.

As such, it will be understood that the technical configuration of the present invention described above can be implemented in other specific forms without changing the technical spirit or essential features of the present invention by those skilled in the art to which the present invention pertains.

Therefore, the embodiments described above should be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and their All changes or modified forms derived from equivalent concepts should be construed as being included in the scope of the present invention.

S10. pre-screening step
S20. cutting step
S30. ferrous metal removal steps
S40. 1st crushing step
S50. dry cleaning step
S60. friction cleaning step
S70. 2nd crushing step
S80. 1st gravity separation step
S90. 2nd gravity separation step
S100. 1st drying step
S110. 2nd drying step
S120. pellet manufacturing steps
100. Fishing net input part
110. First fishing net input unit
120. Second fishing net input unit
200. Cistern
210. First water tank
211. First transfer paddle
211a. 1-1 transfer paddle
211 b. 1-2 transfer paddle
211c. Transfer paddles 1-3
211d. 1-4 transfer paddles
212. First inclined plate
213. First low specific gravity material discharge unit
214. First high specific gravity substance discharge unit
220. Second water tank
221. Second transfer paddle
221a. 2-1 transfer paddle
211 b. 2-2 transfer paddle
211c. 2-3 transfer paddle
211d. Transfer paddle 2-4
222. Second inclined plate
223. Second low specific gravity material discharge unit
224. Second high specific gravity material discharge unit
300. Specific gravity control unit
310. Density measurement sensor
320. First specific gravity tank unit
330. First specific gravity liquid transfer pump
340. Second specific gravity tank unit
350. Second specific gravity liquid transfer pump

Claims (5)

A preliminary sorting step of collecting waste fishing nets and separating waste fishing gear and non-ferrous metals introduced together from the collected waste fishing nets;
A cutting step of inserting the pre-selected waste fishing net into a cutting machine to produce a cut waste fishing net;
A ferrous metal removal step of separating the ferrous metal by introducing the cut and closed fishing net into a ferrous metal remover;
A primary pulverization step of producing a pulverized waste fishing net by inputting the cut waste fishing net from which the ferrous metal is separated into a primary pulverizer;
A dry cleaning step of removing foreign substances from the pulverized waste fishing net by putting the pulverized waste fishing net into a dry washer;
A friction washing step of putting the dry-cleaned pulverized waste fishing net into a friction washing machine to remove foreign substances in a wet manner;
A secondary pulverization step of producing waste fishnet particles by introducing the friction-washed pulverized waste fishing net into a secondary pulverizer;
A first specific gravity separation step of inputting the secondly pulverized waste fishnet particles into a specific gravity separator to separate a first high specific gravity material and a first low specific gravity material and recovering the first high specific gravity material;
A second specific gravity separation step of separating and recovering the first low specific gravity substance into a second high specific gravity substance and a second low specific gravity substance by introducing the first low specific gravity substance into a specific gravity separator;
A first drying step of dehydrating the second high specific gravity material and the second low specific gravity material by respectively inputting them into a dehydrator;
A secondary drying step of removing residual moisture by introducing the second high specific gravity material and the second low specific gravity material that have undergone the primary drying into a hot air dryer, respectively;
A pellet manufacturing step of producing recycled pellets by respectively inputting the second high specific gravity material and the second low specific gravity material subjected to the secondary drying into a pellet maker,
The first high specific gravity materials recovered in the first specific gravity separation step are PET (Polyethylene terephthalate) and non-ferrous metals, and the first low specific gravity materials are PP (Polypropylene), PE (Polyethylene) and PA6 (Nylon 6),
The second high specific gravity material recovered in the secondary specific gravity separation step is PA6 (Nylon 6), and the second low specific gravity material is PP (Polypropylene) and PE (Polyethylene). Waste fishing net treatment process.
According to claim 1,
The specific gravity separator is provided side by side with two identical gravity separators, and the first gravity separation step and the second gravity separation step are performed in succession.
According to claim 2,
The specific gravity separator,
A fishing net input unit 100 for receiving and moving the pulverized waste fishing net pulverized through the secondary pulverization step downward;
A water tank unit 200 accommodating the specific gravity liquid and the pulverized waste fishing net introduced from the fishing net input unit 100 in the body part of the hollow structure with the upper surface open;
Transfer paddles 211 and 221 provided in the shape of pinwheels installed at the top of the water tank unit 200 in a plurality to immerse the waste fishing nets introduced simultaneously with rotation under the surface of the water and transport them in the direction of rotation;
low specific gravity material discharge units 213 and 223 for recovering the material suspended in the water tank unit 200;
A waste fishing net treatment process comprising a specific gravity separator, characterized in that it further comprises;
According to claim 3,
A specific gravity sensor 310 for detecting the specific gravity of the specific gravity liquid accommodated in the water tank unit 200; and
A waste fishing net treatment process comprising a specific gravity separation device further comprising: a transfer pump (330, 350) for adding or removing the specific gravity liquid by comparing the detected specific gravity value with the set specific gravity value.
According to claim 1,
The specific gravity separator is separated using a specific gravity liquid,
The first specific gravity separation step uses a first specific gravity liquid having a specific gravity of 1.2 g / cm 3,
The second specific gravity separation step is a waste fishing net treatment process comprising a specific gravity separation device, characterized in that using the second specific gravity liquid of 1.0 g / cm3 specific gravity.