KR102255888B1 - Marine plastic recycling equipment and Marine plastic recycling method - Google Patents

Abstract

The present invention relates to a marine plastic recycling apparatus and a marine plastic recycling method using the same. According to the present invention, the marine plastic recycling method comprises: a collection process of collecting marine plastics by using a ship; a removal process of passing the marine plastics moving along a first conveyor through a remover to separate and remove attached foreign substances; a cutting process of inserting the marine plastics from which the foreign substances have been removed through the removal process into a cutter to cut the same; a primary washing process of putting in the marine plastics cut through the cutting process and performing desalting and washing operations together with a first washing water by a first washing machine; a crushing process of by putting the marine plastics washed through the primary washing process into a pulverizer to generate pulverized marine plastics pulverized into finer particles than that of the cutting step; a second washing process of washing the pulverized marine plastics pulverized by the crushing process together with washing water by a second washing machine; a drying process of removing moisture from the pulverized marine plastics washed through the secondary washing process by a dryer; a primary melting process of introducing and melting the pulverized marine plastics dried through the drying process into a first melting machine to generating melt; a secondary melting process of injecting and melting the melt of the primary melting process into a second melting machine; and a pelletizing process of passing the melt of the secondary melting process through a pelletizer to manufacture pellets. Accordingly, the cost, procedure, and input apparatus for marine plastics are simplified, thereby minimizing a decrease in the performance of a recycled resin.

Description

Marine plastic recycling equipment and marine plastic recycling method using the same

The present invention relates to marine plastic recycling, and more specifically, a marine plastic recycling device capable of minimizing the reduction in the performance of the recycled resin by simplifying the cost and procedure and the input device for recycling the marine plastic, and using the device. It relates to a method of recycling marine plastics.

In general, the sea, which occupies about 70% of the Earth's surface, is a repository of all kinds of living things and a source of mineral resources.

Therefore, a lot of effort is required to maintain a clean sea so that ecological resources and natural mineral resources can be continuously maintained and protected.

However, oil pollution accidents, the discharge of chemicals or radioactive substances, which are frequently occurring along with industrial development, have adverse effects on the marine ecosystem.In addition to this, plastic waste flowed from land, fishing nets made of plastic, and fishing gear in recent years. Pollution of marine ecosystems caused by various marine plastics such as, etc. is a situation that is emerging as a new environmental problem.

In particular, plastic products take a long time to decompose in nature, and when incinerated, substances that are very harmful to the human body, such as dioxins, may be generated. Therefore, special attention is required for post-use treatment.

In addition, marine plastics including polypropylene (PP), polyethylene (PE), and polystyrene (PS) plastics, waste vinyl, buoys, fishing gear, waste fishing nets, and waste tires are discarded or lost in the sea for a long time. While drifting, it causes a lot of damage to marine life, and there is a problem of damaging the marine environment as well as destroying the marine environment.

In addition, among these marine plastics, garbage deposited on the sea floor such as fishing nets and fishing gear is a major cause of destruction of marine ecosystems by damaging habitats of marine organisms and fishing grounds of fishing villages.

Recently, as the marine environment pollution problem caused by various marine plastics such as plastics has reached a serious level, several advanced countries such as the United States, Japan, and Europe are investigating the density and damage status of marine plastics distributed in their coastal and coastal waters. The organization is making a lot of effort in the collection of marine and submarine waste.

Meanwhile, as part of the marine plastic purification project in Korea, a large amount of budget is being invested in the marine plastic collection business, fishing net lifting business, and marine plastic collection and treatment business for the purification of fishing grounds, but the effect on this is still insufficient.

In the conventional collection and treatment of marine plastics, the marine plastics are collected and transported, stored in a storage facility on land, and then processed through a final sorting process.Therefore, secondary and tertiary environmental problems are encountered in the collection and treatment process. It is occurring.

For this problem, Patent Document 1 proposes a vessel capable of collecting marine plastics for the purpose of purifying the seabed of coastal or offshore, such as a multifunctional marine plastics collection vessel equipped with a residual garbage collection device.

However, Patent Document 1 is to reduce the volume of marine plastic by crushing or compression after collecting it and transport it to the land, and the transported marine plastic is loaded on the shore, providing another cause of environmental pollution.

In addition, since marine plastics are immersed in seawater, moisture is absorbed, their weight increases, and salts permeate, there is a problem that a secondary environmental pollution problem is caused by dioxins, etc. discharged during the incineration of marine plastics.

Therefore, a technology that can minimize environmental problems and recycle is required.

KR 10-0481168 B1

In order to solve the above problems, the present invention comprises a more specific removal process and washing process in the process of recycling marine plastics, thereby simplifying the cost and procedure for recycling marine plastics, and an input device. An object of the present invention is to provide a marine plastic recycling apparatus capable of minimizing performance reduction and a marine plastic recycling method using the apparatus.

In order to achieve the above object, the present invention is provided along the first conveyor to remove foreign substances from marine plastic; A cutter for cutting the marine plastic from which foreign matters have been removed through the remover; A first washing machine for washing, including a washing drum into which the marine plastic cut through the cutting machine and the first washing water are injected, and a rotating body rotating the washing drum; A pulverizer for pulverizing the marine plastic washed through the first washing machine into finer particles than the cutting machine; A second washing machine for secondary washing by injecting the marine plastic pulverized through the crusher together with second washing water; A dryer for drying the marine plastics washed through the second washer; A melting machine for generating a melt by introducing the dried marine plastic through the dryer; It provides a marine plastic recycling apparatus, characterized in that it comprises a pellet manufacturing machine for manufacturing pellets by receiving the melted product of the marine plastic melted through the melting machine.

And, a collection process for collecting marine plastics using a ship through the above configuration; A removal step of separating and removing foreign substances attached by passing the marine plastic moving along the first conveyor through an eliminator; A cutting process of cutting the marine plastic from which the foreign matter has been removed through the removal process by inserting it into a cutting machine; A first washing step of introducing the marine plastic cut through the cutting step and performing desalting and washing operations together with the first washing water by a first washing machine; A crushing step of generating a pulverized product of the marine plastic by putting the marine plastic washed through the first washing process into a pulverizer; A second washing step of washing the crushed product of the marine plastic crushed by the crushing step together with the second washing water by a second washing machine; A drying step of removing moisture from the pulverized product of marine plastic washed through the second washing step by a dryer; A first melting step of injecting and melting the pulverized product of marine plastic dried through the drying step into a first melting machine to generate a melt; A second melting step of injecting and melting the melt of the first melting step into a second melting machine; It provides a marine plastic recycling method, characterized in that it comprises a pellet manufacturing process of producing pellets by passing the melt of the secondary melting process through a pellet maker.

By providing the present invention configured as described above, there is an effect of minimizing the reduction in performance of the recycled resin by simplifying the cost and procedure and the input device for marine plastics to be recycled.

1 is a flow chart showing a marine plastic recycling method according to the present invention.
Figure 2 is a schematic diagram showing the overall process to which the marine plastic recycling apparatus according to the present invention is applied.
3 is a block diagram showing a remover applied to the marine plastic recycling apparatus according to the present invention.
4 is a block diagram showing a second washer and dryer applied to the marine plastic recycling apparatus according to the present invention.

Hereinafter, a preferred embodiment will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the same technical field can easily implement the present invention.

The marine plastic recycling method of the present invention may include a marine plastic collection process, a removal process, a cutting process, a washing process, a crushing process, a drying process, a melting process, and a pellet manufacturing process.

1 to 4, the method of recycling marine plastics using the marine plastic recycling apparatus in the embodiment of the present invention is a collection process (S10) -> removal process (S11) for the marine plastics (1). -> Cutting process (S12) -> Primary cleaning process (S13) -> Crushing process (S14) -> Secondary washing process (S15) -> Drying process (S16) -> Primary melting process (S17) -> The marine plastic 1 can be recycled by sequentially implementing the secondary melting process (S18) -> pellet manufacturing process (S19).

The process of recycling the marine plastic 1 according to the above procedure will be described in detail.

First, in the collection process S10, the marine plastic 1 floating or deposited in the sea may be collected using a ship.

As described above, among the marine plastics (1) collected, in particular, the products collected for recycling in the present invention include polyethylene (PE) and polypropylene (PP) used as nets in the ocean such as fishing nets, ropes, and fishing gear. Can be used as a raw material to be recycled.

For example, PP and PE have a lower specific gravity than water and can float on the water. However, fishing nets and ropes made based on these materials sink to the seabed by weights to form an artificial habitat to make abalone and barnacles. The shell of the back may be attached, sand, sand, and various marine pollutants may be closely attached.

As described above, it is described that shellfish are attached mainly to the fishing nets deposited on the seabed, but all marine plastics (1) that sink to the seabed made of PP and PE can be applied, and such marine plastics (1) ), it can be applied to all foreign substances including shells that are attached to or settled.

Second, in the removal process (S11), the marine plastic 1 moving along the first conveyor 110 may be passed through the remover 100 to separate and remove adhered foreign matter.

The remover 100 of the removal process (S11) includes a pressure roll 120 and an inhaler 130, and the pressure roll 120 removes foreign matter at the same pressure regardless of the thickness of the marine plastic 1 It may further include a sensor member 140 for providing a signal to a control unit (not shown) that adjusts the pressing force of the pressing roll 120 so that it can be separated.

Here, the pressing roll 120 can separate foreign matters attached to the marine plastics 1 moving along the first conveyor 110 by pressing against a force that presses them in a vertical downward direction corresponding to the first conveyor 110. I can.

Here, the sensor member 140 may include a pressure sensor that senses a pressing force of the pressure roll 120 against the marine plastic 1 and a position sensor that senses the height of the pressure roll 120.

In this way, by detecting the height of the pressure roll 120 through the position sensor of the sensor member 140, the height can be adjusted to press the marine plastic 1 according to the height of the marine plastic 1, and the sensor Through the pressure sensor of the member 140, it is possible to provide an appropriate pressure so that only the foreign matter can be separated by pressing while minimizing damage to the marine plastic 1 with respect to the foreign matter attached to the marine plastic 1.

3, the removal step (S11) is a process of moving the collected marine plastic 1 along the first conveyor 110 of the eliminator 100, among foreign substances attached to the outside of the marine plastic 1 In order to remove foreign substances such as barnacles and oyster shells, the roll surface of the pressure roll 120 is disposed on the upper part spaced apart from the first conveyor 110 and pressurized with a certain pressure to separate foreign substances from the surface of the marine plastic 1 This is a process of suction and removal through the inhaler 130 located at the rear end.

Third, in the cutting process (S12), the marine plastic 1 from which foreign substances have been removed through the removal process (S11) may be introduced and cut into the cutter 200.

In particular, in the case of the cutting machine 200, it is preferable to use a hydraulic press cutting machine capable of cutting the marine plastic 1 inputted into a size of 300 to 500 mm.

Fourth, in the first washing step (S13), desalting and washing operations can be performed together with the first washing water by the first washing machine 300 by inputting the marine plastic 1 cut through the cutting step (S12). have.

The washing machine 310 applied in the first washing process (S13) includes a washing drum 311 made of a circular shape made of stainless steel and a rotating body 313 that rotates the washing drum 311, and a cutter ( The marine plastic (1) cut by 200) may be added and the first washing water may be added together for washing.

Most preferably, the washing machine 310 has a structure similar to the basic principle of a drum washing machine.

At this time, the first washing water dilutes an industrial detergent in water and fills it together with the washing machine 310, and the marine plastic 1 cut by rotation cleans and separates salts and various foreign substances that have penetrated into the interior due to underwater friction. After draining, the washing drum 311 is rotated at high speed to dehydrate the marine plastic 1 accommodated in the washing drum 311 and provided to the next process.

Fifth, in the crushing step (S14), the marine plastics (1) washed through the first washing step (S13) are put into the crusher 400 to be pulverized into finer particles than the cutting step (S12). The pulverized product (2) of (1) can be produced.

At this time, the pulverizer 400 is preferably implemented with a crushing roll having a uniaxial or multi-axis or a toothed crushing blade that is meshed, and a crushed product ( It is possible to perform a process of repeatedly passing through a plurality of grinders 400 to secure 2).

Sixth, the second washing step (S15) can wash the pulverized product 2 of the marine plastic 1 crushed by the crushing step (S14) together with the second washing water by the second washing machine (500). have.

Referring to FIG. 4, the second washing machine 500 includes a washing water tank 510 for accommodating a second washing water together with the crushed product 2 of the marine plastic 1 crushed by the crushing step (S14), and the A plurality of washing wheels 530 having washing blades 531 so as to agitate the pulverized material 2 of the marine plastic 1, which is horizontally installed in the washing tank 510 and accommodated at the same time as it rotates, and the washing wheel ( It may include a second conveyor 540 for moving the pulverized product 2 of the marine plastic 1 washed by 530 to the dryer 600 side.

At this time, at the upper portion of the washing water tank 510, a jetting hole 520 for compressing the second washing water to be sprayed with the second washing water so that the pulverized material 2 contained in the carrier 541 of the second conveyor 540 can be finally washed is further provided. It can be provided.

Here, the pulverized product 2 of the pulverized marine plastic 1 is put into the washing bath 510, and the washing bath 510 uses tap water without a separate detergent to give a gentle slope so that the water flows. It is possible to clean the pulverized product 2 by installing a circular-shaped washing wheel 530 so that the pulverized product 2 of the marine plastic 1 is stirred.

At this time, the pulverized product 2 of the marine plastic 1 is removed from the washing tank 510 through the carrier 541 of the second conveyor 540, and the second washing water is drained to the drain hole below the washing tank 510. , Purification can be performed repeatedly.

In addition, by spraying the washing water to the second conveyor 540 through the injection port 520 by high-pressure spraying, foreign substances remaining in the pulverized material 2 can be finally removed, and the number of times of washing is increased according to the pollution degree of the marine plastic. can do.

After all, the first washing process (S13) is a process of removing various contaminants by washing and desalting through a cleaning agent as a washing process, and the second washing process (S15) is a process of removing fine foreign substances and cleaning substances that are finally remaining in the rinse process. All can be removed by washing.

Seventh, in the drying process (S16), the pulverized product (2) of the marine plastics (1) washed through the secondary washing process (S15) may be added to remove moisture by the dryer (600).

At this time, the pulverized product 2 of the marine plastic 1 retrieved by the carrier 541 through the second conveyor 540 is moved to the third conveyor 620, and the dryer 600 is less than 100°C. Moisture can be removed by hot air drying.

That is, as hot air drying by the dryer 600, air bubbles in the pellets produced by the pulverized material 2 of the marine plastic 1 may be minimized.

Secondly, the first melting process (S17) of injecting and melting the pulverized product (2) of the marine plastic (1) dried through the drying process (S16) into the first melting machine (700) to generate a melt (S17), and The second melting process (S18) of injecting and melting the melt of the first melting process (S17) into the second melting machine 800 may be sequentially performed.

At this time, in the first melting step (S17), a 40 to 60 mesh filter is applied to melt it, and in the second melting step (S18), a micro-mesh filter is applied to thereby sequentially melt into finer particles.

Although the foreign matter can be sequentially removed through the removal process (S11) and the washing process (S13, S15) above, a mesh filter can be provided to finally remove finer foreign matter in order to obtain the purest plastic raw material.

Ninth, in the pellet manufacturing process (S19), the melt of the secondary melting process (S18) may be passed through the pellet maker 900 to produce the pellets 3.

Accordingly, the present invention aims to recycle marine plastics, which account for about 55.6% of marine waste, which has become an issue recently, and the recycling of marine plastics has been desalting and desalting for recycling of polyamide (nylon) series in waste fishing nets. Through the process, a technology for manufacturing textiles for clothing was developed and used.

In the end, recycling through minimal processes to solve the problem of marine waste by activating the recycling of marine plastics by developing technology to recycle polyethylene (PE) and polypropylene (PP)-based plastics used in waste fishing nets, ropes, and fishing gear. A process that can minimize the decrease in the performance of plastics caused by this was suggested.

The terms and words used in the present specification and claims described above should not be construed as being limited to their usual or dictionary meanings, and the present inventors appropriate the concept of terms in order to describe their own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention on the basis of the principle that it can be defined.

Accordingly, the configurations shown in the drawings and embodiments described in the present specification are only one of the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, and thus they can be replaced at the time of application. It is to be understood that there may be a variety of equivalents and variations that may exist.

100: eliminator 110: first conveyor
120: pressure roll 130: inhaler
140: sensor member 200: cutter
300: first washing machine 310: washing machine
400: grinder 500: second washer
510: washing tank 520: nozzle
530: washing wheel 540: second conveyor
600: dryer 620: third conveyor
700: first melting period 800: second melting period
900: pellet maker S10: collection process
S11: removal process S12: cutting process
S13: primary washing process S14: crushing process
S15: secondary washing process S16: drying process
S17: primary melting process S18: secondary melting process
S19: pellet manufacturing process

Claims (6)

A remover installed along the first conveyor to remove foreign substances from marine plastics;
A cutter for cutting the marine plastic from which foreign matters have been removed through the remover;
A first washing machine for washing, including a washing drum into which the marine plastic cut through the cutter and the first washing water are injected, and a rotating body rotating the washing drum;
A pulverizer for pulverizing the marine plastic washed through the first washing machine into finer particles than the cutting machine;
A second washing machine for secondary washing by injecting the marine plastic pulverized through the crusher together with second washing water;
A dryer for drying the marine plastics washed through the second washer;
A melting machine for generating a melt by introducing the dried marine plastic through the dryer;
Including a pellet maker for manufacturing pellets by receiving the melt of the marine plastic melted through the melting machine,
The eliminator,
A pressing roll that pressurizes the marine plastic to separate foreign substances from the marine plastic;
An inhaler for sucking and removing foreign substances separated by the pressure roll;
Marine plastic recycling apparatus comprising a sensor member for sensing the operation of the pressure roll.
delete The method according to claim 1,
The sensor member,
A pressure sensor for sensing a pressing force of the pressing roll with respect to the marine plastic;
Marine plastic recycling apparatus comprising a position sensor for detecting the height of the pressure roll.
The method according to claim 1,
The second washer,
A washing tank for accommodating the second washing water together with the crushed product of the marine plastic crushed through the crusher;
A plurality of washing wheels installed horizontally in the washing tank and having washing blades so as to agitate the pulverized product of marine plastic accommodated at the same time as it rotates;
And a second conveyor for moving the pulverized product of the marine plastic washed by the washing wheel toward the dryer.
The method of claim 4,
The marine plastic recycling apparatus, further comprising: a jet hole provided on the upper portion of the washing tank and compressingly spraying the second washing water so as to clean the pulverized material contained in the carrier of the second conveyor.
In the method for recycling marine plastics using the marine plastic recycling device configured according to claim 1,
A collection process for collecting marine plastics using a ship;
A removal step of separating and removing foreign substances attached by passing the marine plastic moving along the first conveyor through an eliminator;
A cutting process of cutting the marine plastic from which the foreign matter has been removed through the removal process by putting it into a cutting machine;
A first washing step of introducing the marine plastic cut through the cutting step and performing desalting and washing operations together with the first washing water by a first washing machine;
A crushing step of generating a pulverized product of the marine plastic by putting the marine plastic washed through the first washing process into a pulverizer;
A second washing step of washing the crushed product of the marine plastic crushed by the crushing step together with the second washing water by a second washing machine;
A drying step of removing moisture from the pulverized product of marine plastic washed through the second washing step by a dryer;
A first melting step of injecting and melting the pulverized product of marine plastic dried through the drying step into a first melting machine to generate a melt;
A second melting step of injecting and melting the melt of the first melting step into a second melting machine;
A method for recycling marine plastics comprising a pellet manufacturing process of producing pellets by passing the melt of the secondary melting process through a pellet maker.

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