KR20240076123A - Appratus for dividing waste plastic according to specific gravity - Google Patents

Abstract

According to an embodiment of the present invention, in a waste plastic specific gravity separation device, a dummy waste plastic mixed with waste plastics of different specific gravity is placed in a water tank, and the first waste plastic with a specific gravity greater than a standard size is allowed to settle at the bottom of the water tank, The second waste plastic whose specific gravity is below the standard size is floated to the top of the water tank and selected based on the difference in specific gravity. An input conveyor that feeds the dummy waste plastic into the water tank is installed to the bottom of the water tank so that the initially introduced dummy waste plastic is stored in the water tank. By allowing the first waste plastic, which has a relatively large specific gravity, to be moved through a conveyor to the bottom, the time it takes for it to settle in the water tank is shortened. In addition, a plurality of anti-float partition walls of different lengths are spaced at regular intervals inside the water tank. By arranging the first waste plastic with a large specific gravity to temporarily float to the top of the water tank and prevent it from mixing with the second waste plastic with a small specific gravity, the separation efficiency of the waste plastic can be increased.

Description

Waste plastic specific gravity separation device {APPRATUS FOR DIVIDING WASTE PLASTIC ACCORDING TO SPECIFIC GRAVITY}

The present invention relates to waste plastic sorting. More specifically, in a water tank, a dummy waste plastic mixed with waste plastics of different specific gravity is allowed to settle at the bottom of the water tank, and the first waste plastic with a specific gravity greater than a standard size is deposited at the bottom of the water tank. The second waste plastic that is smaller than the size is floated to the top of the water tank and selected based on the difference in specific gravity, and an input conveyor that feeds the dummy waste plastic into the water tank is installed to the bottom of the water tank, so that the initially introduced dummy waste plastic is conveyed to the bottom of the water tank. By allowing the first waste plastic, which has a relatively large specific gravity, to move through the tank, it shortens the time it takes for the first waste plastic, which has a relatively large specific gravity, to settle in the water tank. In addition, a plurality of anti-floating partition walls of different lengths are placed at regular intervals inside the water tank to reduce the specific gravity. This relates to a waste plastic specific gravity separation device that increases the separation efficiency of the waste plastic by preventing the large first waste plastic from temporarily floating to the top of the water tank and mixing with the second waste plastic with a small specific gravity.

In general, recycling of waste plastics involves collecting, washing, shredding, and sorting waste plastics in a certain order. The sorting process involves visual sorting by workers, based on weight or shape. This includes a method of using a sorting device and a specific gravity separation method of throwing it into water and separating it according to specific gravity.

Figure 1 is an exemplary diagram of a conventional waste plastic gravity separation device. In the conventional waste plastic specific gravity separation device, as shown in Figure 1, a dummy waste plastic mixed with different waste plastics is put into the upper part of the water tank. For example, the first waste plastic with a specific gravity of 1 or more and a relatively large specific gravity is The second waste plastic, which begins to sink from the water surface and settles to the bottom of the water tank, and has a relatively small specific gravity of less than 1, is configured to move horizontally along the water surface and be separated by specific gravity.

At this time, the first waste plastic is, for example, a PET plastic that makes up the body of the PET bottle and may have a specific gravity of about 1.3, and the second waste plastic is a PP or PE plastic that makes up the cap of the PET bottle and has a specific gravity of about 1.3. It may be 0.95 to 0.98, and the first waste plastic and the second waste plastic are pulverized and mixed with each other during the waste plastic collection process.

As shown above, when dummy waste plastic mixed with first and second waste plastics is put into the upper part of the water tank, the first waste plastic made of PET naturally precipitates in the water, and the second waste plastic made of PE or PP rises to the surface. It comes to mind.

However, during the process of pulverizing the first waste plastic, saw blades or sharp shapes may exist on the outer surface, and when submerged in water in this shape, air bubbles remain attached to the outer surface due to the surface condition of the waste plastic, resulting in a specific gravity of 1. Despite this, it does not sink in the water and temporarily floats to the top of the water tank, where it may be mixed with the second waste plastic.

In addition, the above phenomenon occurs even when the thickness of the first waste plastic is very thin. If the first waste plastic with a specific gravity of 1 or more is thin and wide, the speed of settling to the water surface is slowed, so it may be mixed with the second waste plastic. There is a problem that it may take a lot of time to completely separate the first waste plastic and the second waste plastic due to the difference in specific gravity.

Republic of Korea Patent No. 10-2115223 (registration date May 20, 2020)

Therefore, the purpose of the present invention is to place a dummy waste plastic mixed with waste plastics of different specific gravity in a water tank, so that the first waste plastic with a specific gravity greater than the standard size settles at the bottom of the water tank, and the second waste plastic with a specific gravity less than the standard size settles in the water tank. It floats to the top of the water tank and selects it based on the difference in specific gravity, but an input conveyor that feeds the dummy waste plastic into the water tank is installed to the bottom of the water tank so that the initially introduced dummy waste plastic can be moved through the conveyor to the bottom of the water tank. It shortens the time for the first waste plastic, which has a relatively large specific gravity, to sink in the water tank. In addition, a plurality of anti-floating partition walls with different lengths are placed at regular intervals inside the water tank to prevent the first waste plastic, which has a relatively large specific gravity, from sinking in the water tank. To provide a specific gravity separation device for waste plastic that temporarily floats to the top of the water tank and prevents mixing with second waste plastic of low specific gravity, thereby increasing the separation efficiency of waste plastic.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

The waste plastic specific gravity separation device according to the present invention includes a water tank for separating floating material and sediment according to the specific gravity of waste plastic, a water tank installed at one end of the water tank, the specific gravity of which is less than 1, and a first floating material that floats to the surface of the water. A floating material collection conveyor for collecting waste plastic, a sediment collection conveyor installed at the other end of the water tank and having a specific gravity of 1 or more, for collecting second waste plastic, which is sediment that settles to the bottom of the water tank, and a sediment collection conveyor installed at the other end of the water tank, A floating material horizontal transfer rod for horizontally pushing the first waste plastic to the floating material collection conveyor while moving, and a floating material horizontal transfer rod installed on both walls of the upper part of the water tank to support the floating material horizontal transportation rod, and the floating material horizontal transportation rod A rod guide that allows movement at a certain distance from the water surface of the water tank, a rod transfer motor that moves the floating material horizontal transfer rod on the rod guide, and a first rod guide installed on the sediment collection conveyor side of the water tank, A waste plastic input conveyor for injecting dummy waste plastic in a state in which the waste plastic and the second waste plastic are not separated to a preset first depth in the water tank, and a hopper for inputting the dummy waste plastic into the waste plastic input conveyor; It may include a hopper guide that extends from one end of the hopper to a second depth in the water tank and prevents the dummy waste plastic fed into the waste plastic input conveyor from rising to the surface of the water until it reaches the second depth.

In addition, the floating object horizontal transport rod is supported by the rod guide and includes a support bar installed in a direction across the water tank, and a plurality of protrusions protruding by a predetermined length in the direction toward the water surface of the support object, The rod guide includes an upper rail and a lower rail for transporting the horizontal transport rod for the floating object, and the lower rail is such that when the horizontal transport rod for the floating object is located on the lower rail, a portion of the protrusion is submerged in the water. It is formed at a first height on the water surface so that the floating object horizontal transfer rod is located on the upper rail, and the protrusion may be formed at a second height on the water surface so that the protrusion is not submerged in the water surface.

In addition, the floating material horizontal transport rod moves along the lower rail formed on the rod guide in the case of forward movement moving in the direction of the floating material collection conveyor, and when moving in the forward direction, the protrusion connected to the support is partially submerged in the water surface of the water tank. You can make it move.

In addition, the floating object horizontal transport rod moves along the upper rail formed on the rod guide when moving in the opposite direction to the hopper, and when moving in the opposite direction, the protrusion connected to the support comes out of the water surface of the water tank and extends a certain distance. It can be moved while spaced apart so as not to affect the direction of water flow on the surface of the water tank.

In addition, the protrusion is formed as a circular rod, and among the plurality of protrusions, the two protrusions closest to both sides of the water tank rotate at a constant speed around the support while partially locked in the direction perpendicular to the water surface when moving in the forward direction, and float. When the separation distance from the water collection conveyor is narrowed to within a preset standard distance, it can be rotated in the forward direction corresponding to the flow of water so that the flow of water near the floating material collection conveyor is formed toward the center of the floating material collection conveyor.

In addition, the floating object horizontal transport rod includes two floating object horizontal transport rods, a first rod and a second rod, and when the first load moves in the forward direction through the lower rail, the second load moves the upper rail. When the first rod, which has been moved in the opposite direction and has completed moving in the forward direction, is transferred in the opposite direction through the upper rail, the operation of transferring the second rod in the forward direction through the lower rail may be repeatedly performed.

According to an embodiment of the present invention, in a waste plastic specific gravity separation device, a dummy waste plastic mixed with waste plastics of different specific gravity is placed in a water tank, and the first waste plastic with a specific gravity greater than a standard size is allowed to settle at the bottom of the water tank, The second waste plastic whose specific gravity is below the standard size is floated to the top of the water tank and selected based on the difference in specific gravity. An input conveyor that feeds the dummy waste plastic into the water tank is installed to the bottom of the water tank so that the initially introduced dummy waste plastic is stored in the water tank. By allowing the first waste plastic, which has a relatively large specific gravity, to be moved through a conveyor to the bottom, the time it takes for it to settle in the water tank is shortened. In addition, a plurality of anti-float partition walls of different lengths are spaced at regular intervals inside the water tank. By arranging the first waste plastic with a large specific gravity to temporarily float to the top of the water tank and prevent it from mixing with the second waste plastic with a small specific gravity, the separation efficiency of the waste plastic can be increased.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

Figure 1 is a conceptual diagram of a conventional waste plastic specific gravity separation device.
Figure 2 is a configuration diagram of a waste plastic specific gravity separation device according to one embodiment of the present invention.
Figure 3 is a perspective view of a waste plastic input conveyor according to an embodiment of the present invention.
Figure 4 is a perspective view of a floating material collection conveyor according to an embodiment of the present invention.
Figures 5 and 6 are perspective views of a waste plastic specific gravity separation device according to one embodiment of the present invention.
Figure 7 is a conceptual diagram of the operation of a horizontal floating material transport rod according to an embodiment of the present invention.
Figure 8 is a perspective view of a horizontal transport rod for floating material according to an embodiment of the present invention.
Figure 9 is an exemplary view of water flow change due to a horizontal floating material transfer rod according to an embodiment of the present invention.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the attached drawings. In the following description of the present invention, if a detailed description of a known function or configuration is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. The terms described below are defined in consideration of the functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification.

Figure 2 is a configuration diagram of a waste plastic specific gravity separation device according to one embodiment of the present invention.

Figure 3 is a perspective view of a waste plastic input conveyor according to an embodiment of the present invention.

Figure 4 is a perspective view of a floating material collection conveyor according to an embodiment of the present invention.

Figures 5 and 6 are perspective views of a waste plastic specific gravity separation device according to one embodiment of the present invention.

Figure 7 is a conceptual diagram of the operation of a horizontal floating material transport rod according to an embodiment of the present invention.

Figure 8 is a perspective view of a horizontal transport rod for floating material according to an embodiment of the present invention.

Figure 9 is an exemplary view of water flow change due to a horizontal floating material transfer rod according to an embodiment of the present invention.

Hereinafter, the structure and operation of each component of the waste plastic specific gravity separation device according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 to 9.

Referring to Figure 1, the waste plastic gravity separation device of the present invention includes a water tank 100, a hopper 112, a floating material collection conveyor 250, a waste plastic input conveyor 200, a sediment collection conveyor 300, and a hopper guide. (116), it may include a floating material horizontal transfer rod 650, a floating prevention partition wall (510, 512, 514), a backflow prevention membrane (550), etc.

The water tank 100 is a component for separating floating material and sediment according to the specific gravity of waste plastic introduced through the hopper 112, and is configured to be filled with water to a sufficient depth for separation of specific gravity.

At this time, dummy waste plastic may mean, for example, waste plastic in a mixed state of first waste plastic with a specific gravity of 1 or less and second waste plastic with a specific gravity of 1 or more, and the first waste plastic is a floating material at the top of the water tank. It can float and be collected through the floating material collection conveyor 250, and the second waste plastic can settle as sediment at the bottom of the water tank and be collected through the sediment collection conveyor 300. In addition, at this time, the first waste plastic is, for example, a PET plastic that makes up the body of the PET bottle and may have a specific gravity of about 1.3, and the second waste plastic is, for example, a PP or PE material that makes up the cap of the PET bottle. It is plastic and may have a specific gravity of about 0.95 to 0.98, but is not limited thereto.

The floating material collection conveyor 250 is installed at one end of the water tank 100 and is a component for collecting the first waste plastic with a specific gravity of less than 1, that is, floating material.

The floating material collection conveyor 250 has a small specific gravity and is configured to transport floating material floating to the surface of the water tank so that it can be discharged to one side. The floating material collection conveyor 250 includes a conveyor belt 254 rotatably installed between the upper roller 256 and the lower roller 258, and the conveyor belt 254 is installed between the guide panels 252 on both sides. It is configured to move upward. An outlet 260 is formed at the upper end of the conveyor belt 254 to allow floating objects to be dropped.

The sediment collection conveyor 300 is installed at the bottom of the water tank 100 and is a component for collecting sediment with a specific gravity of 1 or more. The sediment collection conveyor 300 is configured to rotate with a screw fixed to the rotation shaft 310, and as the screw rotates, the sediment collected at the bottom of the water stored in the water tank 100 is collected and transferred to the discharge port 320 for discharge. It is composed.

The floating object horizontal transfer rod 650 is supported by rod guides extending from both walls of the upper part of the water tank 100 and is installed horizontally in the direction across the water tank 100 to levitate the floating object with a specific gravity of less than 1. It is a component for pushing and sending water horizontally to the water collection conveyor (250).

In the case of forward movement in the direction of the floating material collection conveyor, the floating material horizontal transfer rod 640 moves along the lower rail formed in the rod guide, and when moving in the forward direction, it is shown in (a) of Figures 5 and 7. As shown, the protrusion 654 connected to the support 652 moves while partially submerged in the water surface of the water tank, thereby helping the floating material move toward the floating material collection conveyor.

In addition, the floating material horizontal transfer rod 640 moves along the upper rail formed on the rod guide in the case of movement in the opposite direction to the hopper, and as shown in Figures 6 and 7 (b) when moving in the opposite direction. Likewise, the protrusion 654 connected to the support 652 comes out of the water surface of the water tank and moves at a certain distance apart so as not to affect the direction of water flow on the surface of the water tank.

In addition, among the protrusions 654, the two protrusions 654_1 and 654_2 closest to both sides of the water tank 100 are configured to rotate at a constant speed around the support 652 while partially submerged in a direction perpendicular to the water surface. However, when the separation distance from the floating material collection conveyor 250 is narrowed to within the preset standard distance, the floating material is collected by rotating in the forward direction 930 corresponding to the water flow 910, as shown in FIGS. 8 and 9. A flow of water near the conveyor is formed in the direction 920 toward the center of the floating material collection conveyor.

As a preferred embodiment of the present invention, the protrusion of the floating object horizontal transfer rod 650 is composed of a cylindrical shape (rod shape) and is characterized in that it does not form a special rotary blade on the outer surface and does not rotate.

The conventional floating object horizontal transfer rod is configured to promote the horizontal transfer of the floating object by forming a rotating blade in the radial direction on the rotating shaft and generating a water current by the rotation of the rotating blade. However, in the present invention, a cylindrical protrusion is partially submerged in the water. It is designed to move as it is, so the water near the surface moves horizontally in the direction of the floating material collection conveyor, relying only on the friction between the outer surface of the protrusion and the water.

That is, in a configuration with a conventional rotary blade or a configuration in which a cylindrical rod rotates, the floating material does not naturally move horizontally to the floating material collection conveyor 250 due to the sloshing of water due to the rotation of the rotating blade or the rotation of the cylindrical rod, but intermittently back and forth. Movement occurs and becomes a factor that hinders rapid separation and transfer, and also, when the rotary blade and the cylindrical rod rotate, the adjacent first waste plastic is lowered to the water surface, which causes interference with the horizontal movement of the first waste plastic on the water surface. .

Accordingly, in the configuration of the horizontal transfer rod 650 of the present invention, it is configured to move horizontally while dividing the water surface without rotation, so that the sloshing of water disappears and the surface water moves naturally up and down, continuously moving from the hopper to the floating material collection conveyor 250. By moving in one direction, rapid separation of floating objects is possible.

In addition, the floating object horizontal transfer rod 650 includes two floating object horizontal transport rods, a first rod and a second rod, and when the first load is transported in the forward direction through the lower rail, the second load is connected to the upper rail. When the first rod, which has completed forward transfer, is transferred in the opposite direction through the upper rail, the operation of transferring the second rod in the forward direction through the lower rail is repeatedly performed. Accordingly, the floating material horizontal transfer rod 650 can be continuously moved on the surface of the water toward the floating material collection conveyor to help the flow of water.

The rod guide is installed on both walls of the upper part of the water tank to support the horizontal transport rod for floating objects, and allows the horizontal transport rod for floating objects to move back and forth while being spaced a certain distance from the water surface of the water tank.

The rod guide includes an upper rail and a lower rail for transporting the floating object horizontal transfer rod. The lower rail may be formed at a first height on the water surface such that a portion of the protrusion is submerged in the water when the floating object horizontal transport rod is located on the lower rail, and the upper rail is the floating object horizontal transport rod. When located on the upper rail, the protrusion may be formed at a second height above the water surface to prevent it from being submerged in the water surface.

The rod transfer motor transfers the floating object horizontal transfer rod on the rod guide.

The waste plastic input conveyor 200 is installed on the sediment collection conveyor 300 side of the water tank 100, and is a component for forcibly introducing unseparated dummy waste plastic to the first depth in the water tank.

By injecting dummy waste plastic before separation under a certain depth in the water tank using the waste plastic input conveyor 200, the separation time of the dummy waste plastic can be shortened by eliminating the time for sediment to settle due to specific gravity. In other words, the speed at which floating material with a specific gravity of less than 1 floats faster than the speed at which sediments with a specific gravity of 1 or more deposited on the water surface are faster. Therefore, rather than setting the injection location of dummy waste plastic on the water surface, it is better to place the dummy waste plastic at a certain depth from the water surface. Setting it up in water allows you to organize the separation process more quickly. In particular, waste plastics with a specific gravity of 1 or more, which are relatively thin, naturally take a lot of time to settle, so the specific gravity separation time can be shortened by forcibly placing them in a deep position in the water tank.

As shown in FIG. 2 of the waste plastic input conveyor 200, a conveyor belt 203 is rotatably installed between the upper roller 211 and the lower roller 213, and the surface of the conveyor belt 203 is spaced at regular intervals. The catching wing 205 may be formed to protrude. The catching wing 205 captures the dummy waste plastic input into the hopper and transports it to a certain depth of the water tank. The conveyor belt 203 is guided by guide panels 201 on both sides and is configured to move downward.

The hopper guide 116 extends from one end of the hopper and is formed to a second depth in the water tank to prevent dummy waste plastic moving to the lower part of the water tank through the waste plastic input conveyor 200 from immediately rising to the water surface as soon as it touches the water surface. I order it. As shown in FIG. 1, the hopper guide 116 can be installed on both sides of the water tank with a tilt angle that is the same as that of the waste plastic input conveyor while being spaced a certain distance apart from the waste plastic input conveyor. At this time, the first depth may be formed relatively deeper than the second depth, but is not limited to this.

The floating prevention partition walls 510, 512, and 514 are installed vertically in the center area of the water tank to cause sediment rising along the rising water flow to collide and fall. As shown in FIG. 1, the partition walls 510, 512, and 514 are arranged in a direction transverse to the direction of the water flow to prevent the movement of waste plastic that floats to the surface among the waste plastic introduced into the water by the waste plastic input conveyor 200. It is designed to hinder.

Therefore, the floating waste plastic collides with the partition walls 510, 512, and 514. At this time, the second waste plastic, which is composed of thin waste plastic with a specific gravity of 1 or more or is still undesirably floating due to the formation of bubbles, collides with the partition walls 510, 512. , 514), it loses its propulsive force to rise, so it descends and is classified as sediment that should be originally classified, so that it can be moved toward the sediment collection conveyor 300. In the embodiment of the present invention, three anti-floating partition walls 510, 512, and 514 are illustrated, but the number and spacing of the partition walls 510, 512, and 514 can be selected in consideration of the length and depth of the water tank. You can.

In addition, the height of the floating prevention partition walls 510, 512, and 514 is relatively increased the closer it is to the hopper guide 116 in the water tank to prevent the first waste plastic that should float to the water surface of the water tank. Can be installed low.

Additionally, the anti-floating partition walls 510, 512, and 514 may be composed of porous plates with a plurality of through holes so that sediments collide and an upward water flow is maintained. Therefore, the rising water flow can move forward without being resisted by the partition walls (510, 512, 514), and the second waste plastic traveling along with it strongly collides with the partition walls (510, 512, 514), forming waste plastic with a specific gravity of 1 or more. The effect of lowering the unwanted floating secondary waste plastic can be greatly increased.

The backflow prevention membrane 550 is installed at the end of the waste plastic input conveyor 200 on the bottom of the water tank, and is installed at the closest position that does not come into contact with the catching wing 205, so that the sediment settled on the bottom of the water tank is removed from the waste plastic. It is prevented from entering the rear space of the input conveyor (200).

As described above, according to one embodiment of the present invention, in the waste plastic specific gravity separation device, the dummy waste plastic mixed with waste plastics of different specific gravity is placed in a water tank, and the first waste plastic with a specific gravity greater than the standard size is placed at the bottom of the water tank. The second waste plastic with a specific gravity below the standard size is allowed to float to the top of the water tank and is selected based on the difference in specific gravity. An input conveyor that feeds the dummy waste plastic into the water tank is installed to the bottom of the water tank so that the first waste plastic is placed in the water tank. By allowing the waste plastic to be moved to the bottom of the water tank through a conveyor, the time for the relatively large first waste plastic to settle in the water tank is shortened. In addition, a plurality of anti-floating partition walls of different lengths are installed inside the water tank. By arranging them at regular intervals, the first waste plastic with a large specific gravity can be prevented from temporarily floating to the top of the water tank and mixing with the second waste plastic with a small specific gravity, thereby increasing the separation efficiency of the waste plastic.

As described above, the present invention has been described with reference to the illustrative drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformation can occur. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained while explaining the embodiments of the present invention above, it is natural that the predictable effects due to the configuration should also be recognized.

100: Water tank 112: Hopper
116: Hopper guide 200: Waste plastic input conveyor
250: floating material collection conveyor 300: sediment collection conveyor
510: injury prevention partition 550: backflow prevention membrane
650: Floating object horizontal transport rod

Claims (6)

A water tank for separating floating material and sediment according to the specific gravity of waste plastic,
A floating material collection conveyor installed at one end of the water tank, has a specific gravity of less than 1, and is used to collect first waste plastic, which is a floating material that floats to the surface of the water;
A sediment collection conveyor installed at the other end of the water tank to collect second waste plastic, which has a specific gravity of 1 or more and is a sediment that settles to the bottom of the water tank;
A floating material horizontal transfer rod for horizontally pushing the first waste plastic to the floating material collection conveyor while moving on the water surface of the water tank;
A rod guide installed on both walls of the upper part of the water tank to support the horizontal transport rod for floating objects and allowing the horizontal transport rod for floating objects to move at a certain distance from the water surface of the water tank,
a load transfer motor that moves the floating object horizontal transfer rod on a rod guide;
A waste plastic input conveyor installed on the water tank on the side of the sediment collection conveyor for injecting dummy waste plastic in a state in which the first waste plastic and the second waste plastic are not separated to a first preset depth in the water tank;
a hopper for feeding dummy waste plastic into the waste plastic input conveyor;
A hopper guide installed extending from one end of the hopper to a second depth in the water tank to prevent dummy waste plastic fed into the waste plastic input conveyor from floating to the surface until it reaches the second depth.
A waste plastic gravity separation device comprising a. According to claim 1,
The floating object horizontal transfer rod is,
A support bar supported by the rod guide and installed in a direction across the water tank;
It includes a plurality of protrusions formed to protrude a certain length in a direction toward the support surface of the water,
The rod guide is,
It includes an upper rail and a lower rail for transporting the horizontal transport rod for the floating object,
The lower rail is,
When the floating object horizontal transport rod is located on the lower rail, a portion of the protrusion is formed at a first height above the water surface such that it is submerged in the water surface,
The upper rail is,
When the floating material horizontal transfer rod is located on the upper rail, a waste plastic specific gravity separator formed at a second height above the water to prevent the protrusion from being submerged in the water. According to claim 2,
The floating object horizontal transfer rod is,
In the case of forward movement in the direction of the floating material collection conveyor, it moves along the lower rail formed on the rod guide. When moving in the forward direction, it is a waste plastic specific gravity separator that allows the protrusion connected to the support to move while partially submerged in the water surface of the water tank. According to claim 3,
The floating object horizontal transfer rod is,
In the case of movement in the opposite direction toward the hopper, it moves along the upper rail formed on the rod guide. In the case of movement in the opposite direction, the protrusion connected to the support comes out of the water surface of the water tank and moves at a certain distance away from the surface of the water tank. A waste plastic specific gravity separator that prevents it from affecting the direction of water flow. According to claim 2,
The protrusion is,
Formed as a circular rod,
Among the plurality of protrusions, the two protrusions closest to both sides of the water tank rotate at a constant speed around the support while partially submerged in the direction perpendicular to the water surface when moving in the forward direction, and the separation distance from the floating material collection conveyor is a preset standard distance. A waste plastic gravity separator that rotates in the forward direction corresponding to the flow of water so that the flow of water near the floating material collection conveyor is formed toward the center of the floating material collection conveyor when it is narrowed to within 100% of the water flow. According to claim 2,
The floating object horizontal transfer rod is,
It includes two floating horizontal transfer rods, a first rod and a second rod, and when the first rod moves in the forward direction through the lower rail, the second rod moves in the opposite direction through the upper rail,
A waste plastic gravity separator in which when the first rod, which has completed forward movement, is transferred in the opposite direction through the upper rail, the second rod is repeatedly transferred in the forward direction through the lower rail.

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