Plastic flotation device

Abstract

The utility model discloses a plastic flotation device which comprises a quantitative feeding bin, a first screw feeder, a light micro-matter air separation machine, a second screw feeder, a heavy brine flotation tank, a first dehydration discharging machine, a light brine flotation tank, a friction cleaning machine, a second dehydration discharging machine, an efficient drying screw, a bucket elevator, a buffering bin and a ton bag. A brine preparation tank I and a brine preparation tank II; the saline water preparation tank I is connected with the heavy saline water flotation tank through a pipeline and is used for preparing heavy saline water and automatically conveying the heavy saline water to the heavy saline water flotation tank; the second saline water preparation tank is connected with the light saline water flotation tank through a pipeline and used for preparing light saline water and automatically conveying the light saline water to the light saline water flotation tank, and mechanical and streamlined efficient operation of plastic flotation can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of waste plastic recycling and processing technology, specifically a plastic flotation device. Background Technology

[0002] With the continued growth of global plastic consumption, the recycling and regeneration of waste plastics has become crucial for alleviating "white pollution," reducing resource waste, lowering carbon emissions, and achieving a circular economy. Currently, manual sorting of complex mixed waste plastics is inefficient, yields low purity, and is costly, necessitating a more efficient mechanized sorting device. Plastic flotation, as a key physical method for achieving "closed-loop recycling," is particularly suitable for the refined sorting of complex waste plastics such as electronic waste, automotive dismantling parts, motorcycle dismantling parts, and packaging materials. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a plastic flotation device that enables mechanized, streamlined, and efficient plastic flotation operations.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A plastic flotation device includes, in sequence, a quantitative feeding bin, a screw feeder I, a light micro-particle air separator, a screw feeder II, a heavy brine flotation cell, a dewatering discharge machine I, a light brine flotation cell, a friction washer, a dewatering discharge machine II, a high-efficiency drying screw, a bucket elevator, a buffer bin, and a ton bag; brine preparation tank I and brine preparation tank II; the brine preparation tank I is connected to the heavy brine flotation cell via a pipeline and is used to prepare heavy brine and automatically transport it to the heavy brine flotation cell; the brine preparation tank II is connected to the light brine flotation cell via a pipeline and is used to prepare light brine and automatically transport it to the light brine flotation cell.

[0006] In a further preferred embodiment, the discharge port of the quantitative feeding hopper is connected to the inlet of the lightweight micro-material air separator via the screw feeder, for receiving waste mixed crushed material fed in through ton bag opening or loader, and sending the material to the lightweight micro-material air separator for sorting and removal of thin microplastics.

[0007] Furthermore, the discharge port of the lightweight micro-material air separator is connected to the inlet of the heavy brine flotation cell via the screw feeder II, which is used to transport the sheet mixture after removing the thin micro-plastics to the heavy brine flotation cell; the heavy brine flotation cell will transfer the floating, lighter plastics to the dewatering discharge machine I.

[0008] In a further preferred embodiment, the bottom of the heavy brine flotation tank is provided with a discharge port connected to a screw conveyor, which is used to convey the sinking heavy metal and other impurities to the discharge equipment via the screw conveyor.

[0009] In a further preferred embodiment, the discharge port of the dewatering discharge machine is connected to the inlet of the light brine flotation cell, and is used to dewater the floating plastic discharged from the heavy brine flotation cell and then send it into the light brine flotation cell; the light brine flotation cell separates the mixed plastic into light plastic and heavy plastic.

[0010] In a further preferred embodiment, the outlet of the floating plastic with a large proportion in the light brine flotation cell is connected to the inlet of the friction cleaner, the outlet of the friction cleaner is connected to the inlet of the second dewatering discharge machine, the outlet of the second dewatering discharge machine is connected to the inlet of the high-efficiency drying screw, and the water dewatered by the second dewatering discharge machine flows back to the light brine flotation cell through a pipeline.

[0011] Further preferably, the discharge port of the high-efficiency drying screw is connected to the inlet of the bucket elevator, the discharge port of the bucket elevator is connected to the inlet of the buffer silo, and the discharge port of the buffer silo is connected to the ton bag; the friction cleaning machine is used to perform friction cleaning of the surface aging paint and salt water on the floating plastic, the dewatering discharge machine is used to dewater the cleaned plastic, the high-efficiency drying screw is used to dry the dewatered plastic and convey it to the inlet of the bucket elevator, the bucket elevator is used to lift the dried plastic to the buffer silo, and the ton bag is used to collect the plastic in the buffer silo.

[0012] This utility model has the following beneficial effects:

[0013] This utility model discloses a plastic flotation device that enables mechanized, streamlined, and efficient plastic flotation operations. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a plastic flotation device according to the present invention;

[0015] Attached labels: 1. Quantitative feeding bin; 2. Screw feeder 1; 3. Lightweight micro-material air separator; 4. Screw feeder 2; 5. Heavy brine flotation tank; 6. Dewatering discharge machine 1; 7. Light brine flotation tank; 8. Friction cleaner; 9. Dewatering discharge machine 2; 10. High-efficiency drying screw; 11. Bucket elevator; 12. Buffer tank; 13. Ton bag; 14. Brine preparation tank 1; 15. Brine preparation tank 2. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and relevant knowledge. Obviously, the described applications are only some embodiments of the present invention, and not all embodiments.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Reference Figure 1As shown, a plastic flotation device includes a quantitative feeding bin 1, a screw feeder 1 2, a light micro-material air separator 3, a screw feeder 2 4, a heavy brine flotation tank 5, a dewatering discharge machine 1 6, a light brine flotation tank 7, a friction cleaner 8, a dewatering discharge machine 2 9, a high-efficiency drying screw 10, a bucket elevator 11, a buffer bin 12, a ton bag 13, a brine preparation tank 14, and a brine preparation tank 2 15.

[0019] In this invention, brine preparation tank 14 is used to prepare heavy brine, and brine preparation tank 15 is used to prepare light brine. Heavy brine is automatically conveyed to heavy brine flotation tank 5, and light brine is automatically conveyed to light brine flotation tank 7. Waste mixed crushed material can be fed into a quantitative screw feeder hopper 1 via a ton bag or a forklift, and then conveyed to a light micro-material air separator 3 via screw conveyor 2 to separate and remove thin, light plastics. The remaining sheet mixture after removing the thin, light plastics is conveyed by screw conveyor 4 to heavy brine flotation tank 5 for impurity removal flotation; lighter plastics float, while heavier impurities such as metals sink. The floating material is conveyed to dewatering discharge machine 6 via an electric multi-stage roller and staggered toothed paddles, while the sinking metals are conveyed to the discharge equipment via a screw conveyor. The floating plastics, after dewatering in dewatering discharge machine 6, enter light brine flotation tank 7, thus achieving the separation of light and heavy plastics. The water removed by the dewatering machine is reused in the flotation cell. The majority of the floating plastics are cleaned by the friction cleaner 8 to remove the aged paint and brine from their surfaces. They are then dewatered by the dewatering machine discharge machine 9, dried by the high-efficiency drying screw 10, and conveyed to the inlet of the bucket elevator 11. The bucket elevator lifts them to the buffer bin 12, where they are collected in ton bags 13.

[0020] This invention achieves mechanized, streamlined, and automated high-efficiency operation, improving the sorting efficiency and purity of mixed waste plastics. It effectively separates different components from mixed waste plastics, providing excellent pretreatment for subsequent fine silica gel electrostatic sorting and color sorting. It solves the problem of high costs associated with manual sorting, contributing to the development of a resource recycling and circular economy and environmental protection.

[0021] Further preferably, it also includes a PLC control system, which is connected to brine preparation tank 14, brine preparation tank 2 15, heavy brine flotation tank 5, light brine flotation tank 7, dewatering discharge machine 1 6, and dewatering discharge machine 2 9 respectively, to realize the automated control of the entire device. The quantitative feeding bin 1, screw feeder 1 2, screw feeder 2 4, high-efficiency drying screw 10, and bucket elevator 11 are all electrically connected to the PLC control system and their operation is controlled by the PLC control system. Even more preferably, the heavy brine flotation tank 5 achieves automatic replenishment of liquid by controlling the liquid level and density through an intelligent PLC program, and the light brine flotation tank 7 achieves automatic replenishment and discharge of liquid by controlling the liquid level and density through an intelligent PLC program.

[0022] Example 1, a plastic flotation device, referring to Figure 1 As shown, heavy brine and light brine are prepared using brine preparation tanks 14 and 15, respectively. The heavy brine is automatically transported to the heavy brine flotation cell 5, and the light brine is automatically transported to the light brine flotation cell 7, in preparation for subsequent plastic flotation.

[0023] Waste mixed crushed material is fed into a quantitative screw feeder 1 by opening a ton bag or by feeding it into the feeder 2, and then sent to a lightweight micro-material air separator 3 to separate and remove the thin micro-plastics.

[0024] After removing the thin microplastics, the remaining sheet mixture is conveyed by screw conveyor 4 to the heavy brine flotation tank 5 for impurity removal flotation. The floating material is the light plastic, and the sinking material is the heavy metal and other impurities. This process can select out the main plastics that are used for recycling.

[0025] After the first flotation, the floating plastic is scooped out from the outlet of the heavy brine flotation tank 5 and sent to the dewatering discharge machine 6 for dewatering. After dewatering, it undergoes a second classification flotation.

[0026] The dehydrated mixed plastics enter the light brine flotation tank 7. The ones that float to the surface are light plastics, and the ones that sink to the bottom are heavy plastics. This process can separate the mixed plastics into two main categories.

[0027] The larger proportion of floating plastics are automatically fed into the friction cleaning machine 8 after being scooped out. The aged paint and salt water on the surface are cleaned by friction and then sent to the dewatering machine discharge machine 9 for dewatering.

[0028] The dehydrated plastic passes through a high-efficiency drying screw 10, is dried, and conveyed to the inlet of a bucket elevator 11. The bucket elevator then lifts the plastic to a buffer bin 12, where it is collected in a ton bag 13. The collected clean, dry plastic provides favorable conditions for fine separation via silica gel electrostatic sorting and color sorting.

[0029] In this embodiment, the waste mixed plastic crushed material is fed into a quantitative screw feed hopper via a bottom-opening ton bag or a forklift, and then conveyed to a light and thin microplastic air separation unit via a feeding screw to separate light and thin impurities. The air-separated material first enters a gravity flotation tank to separate plastics and metals from the waste mixture. The floating material is conveyed to the discharge equipment via an electric multi-stage roller and staggered toothed paddles, while the sinking metal is conveyed to the discharge equipment via a screw conveyor. The liquid level and density are automatically replenished by an intelligent PLC program. The floating plastics after gravity flotation enter a dewatering machine to remove brine before entering a light flotation tank. The floating material is light plastic, and the sinking material is heavy plastic. The water from the dewatering machine is reused in the flotation tank, with automatic replenishment and discharge controlled by an intelligent PLC program. Plastics with similar densities after flotation are scrubbed, dried, and collected together to prepare for further fine separation.

[0030] Although some embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, and all such changes and alterations should fall within the scope of the present invention.

Claims

1. A plastic flotation device, characterized in that, The system includes, in sequence, a quantitative feeding bin (1), a screw feeder (2), a light micro-material air separator (3), a screw feeder (4), a heavy brine flotation tank (5), a dewatering discharge machine (6), a light brine flotation tank (7), a friction cleaner (8), a dewatering discharge machine (9), a high-efficiency drying screw (10), a bucket elevator (11), a buffer bin (12), and a ton bag (13); a brine preparation tank (14) and a brine preparation tank (2); the brine preparation tank (14) is connected to the heavy brine flotation tank (5) via a pipe and is used to prepare heavy brine and automatically transport it to the heavy brine flotation tank (5); the brine preparation tank (2) is connected to the light brine flotation tank (7) via a pipe and is used to prepare light brine and automatically transport it to the light brine flotation tank (7).

2. The plastic flotation device according to claim 1, characterized in that, The outlet of the quantitative feeding bin (1) is connected to the inlet of the lightweight micro-plastic air separator (3) through the screw feeder (2) to receive waste mixed crushed material and send the material to the lightweight micro-plastic air separator (3) for sorting and removing thin micro-plastics.

3. The plastic flotation device according to claim 2, characterized in that, The outlet of the lightweight micro-material air separator (3) is connected to the inlet of the heavy brine flotation tank (5) through the screw feeder (4), which is used to transport the sheet mixture after removing the thin micro-plastics to the heavy brine flotation tank (5); the heavy brine flotation tank (5) will transfer the floating light plastic to the dewatering discharge machine (6).

4. The plastic flotation device according to claim 3, characterized in that, The bottom of the heavy brine flotation tank (5) is provided with a discharge port connected to a screw conveyor, which is used to convey the sinking heavy metal debris to the discharge equipment via the screw conveyor.

5. A plastic flotation device according to claim 4, characterized in that, The discharge port of the dewatering discharge machine (6) is connected to the inlet of the light brine flotation tank (7) and is used to dewater the floating plastic discharged from the heavy brine flotation tank (5) and send it into the light brine flotation tank (7); the light brine flotation tank (7) separates the mixed plastic into light plastic and heavy plastic.

6. The plastic flotation device according to claim 1, characterized in that, The large proportion of floating plastic discharge port in the light brine flotation tank (7) is connected to the feed port of the friction cleaner (8). The discharge port of the friction cleaner (8) is connected to the feed port of the dewatering discharge machine (9). The discharge port of the dewatering discharge machine (9) is connected to the feed port of the high-efficiency drying screw (10). The water dewatered by the dewatering discharge machine (9) flows back to the light brine flotation tank (7) through a pipe.

7. A plastic flotation device according to claim 6, characterized in that, The discharge port of the high-efficiency drying screw (10) is connected to the inlet of the bucket elevator (11), the discharge port of the bucket elevator (11) is connected to the inlet of the buffer silo (12), and the discharge port of the buffer silo (12) is connected to the ton bag (13). The friction cleaning machine (8) is used to perform friction cleaning of the surface aging paint and salt water on the floating plastic. The dewatering discharge machine (9) is used to dewater the cleaned plastic. The high-efficiency drying screw (10) is used to dry the dewatered plastic and transport it to the inlet of the bucket elevator (11). The bucket elevator (11) is used to lift the dried plastic to the buffer silo (12). The ton bag (13) is used to collect the plastic in the buffer silo (12).

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