A plastic recycling device and its recycling method

Abstract

This invention discloses a plastic recycling device and its recycling method, relating to the field of plastic recycling devices. The plastic recycling device includes a recycling tank with a top opening and a discharge pipe at the bottom. It also includes: multiple rotating shafts arranged in a ring within the recycling tank; an air bladder ring fixedly connected to the rotating shafts; and an inner tank fixedly connected within the recycling tank, coaxially arranged, with its top located away from the top of the main recycling tank. This invention achieves efficient dehydration and precise collection of flocculent fishing nets through a design of extrusion dehydration and mixed liquid suspension separation, avoiding the problem of requiring prolonged soaking to remove residual impurities, thus effectively improving recycling efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of plastic recycling devices, specifically, it relates to a plastic recycling device and its recycling method. Background Technology

[0002] In the field of plastic recycling of discarded fishing nets (such as those made of polyethylene and nylon), the nets need to be cut, crushed, soaked, and finally granulated to complete the recycling and reuse of the fishing nets.

[0003] However, in the fishing net recycling process, the fibrous fishing nets after being cut and crushed will carry a lot of impurities during soaking due to their use and transportation. These impurities are generally mud, sand, oil, etc.

[0004] Since the fishing net is fibrous at this time, these fibers will wrap around impurities, which are difficult to remove quickly. Traditional processes require soaking the fishing net in water for a long time, relying on the impurities to dissolve or settle naturally to achieve separation. This not only takes up a lot of time and extends the recycling cycle, but also has the problem of incomplete removal of impurities, which has certain shortcomings. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a plastic recycling device that can overcome or at least partially solve the above problems.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is: a plastic recycling device, including a recycling tank, a top opening on the recycling tank, a discharge pipe at the bottom of the recycling tank, and further comprising:

[0007] Multiple sets of rotating shafts are arranged in a ring inside the recycling tank;

[0008] The airbag ring is fixedly connected to the rotating shaft;

[0009] The inner tank is fixedly connected inside the recycling tank, coaxially arranged, and the top of the inner tank is far away from the top of the recycling tank.

[0010] Baffle 1 and Baffle 2 are both fixedly connected inside the inner tank. Through Baffle 1 and Baffle 2, the inner tank is divided into an upper chamber, a middle chamber and a lower chamber. The upper chamber and the lower chamber are both open. The middle chamber is filled with a mixed liquid.

[0011] Multiple sets of liquid outlet pipes are installed in a ring at equal intervals on the second partition. The liquid outlet pipes are connected to the middle chamber and a pressure valve is installed inside the liquid outlet pipes. The liquid outlet pipes are used to discharge the mixed liquid.

[0012] An air pump is fixedly connected to the lower chamber. An air inlet pipe is connected to the air inlet end of the air pump, which is connected to the outside of the recovery and processing tank. An air outlet pipe is connected to the air outlet end of the air pump, which is connected to the airbag ring.

[0013] The shredded, flocculent fishing net is poured into the gap between the recycling tank and the inner tank, along with water. The flocculent fishing net is then stirred by a rotating shaft that rotates along the axis of the recycling tank, and the net fragments are squeezed by an air bladder ring to expel the water absorbed by the net. The soaking process continues until the process is complete. The mixed liquid is then continuously discharged through the outlet pipe, carrying the flocculent fishing net upwards. Finally, the flocculent fishing net flows into the upper chamber along with the mixed liquid.

[0014] In order to reduce the air output of the air pump, thereby making the airbag ring smaller, and thus allowing the fibrous fishing net to flow into the space between the airbag ring and the airbag wall, the airbag ring is further provided with multiple sets of exhaust ports, with the exhaust ports near the bottom inclined and facing the bottom of the recycling tank, and a one-way valve is provided in the exhaust ports.

[0015] Furthermore, a secondary pipe is connected to the air outlet of the air pump, and both the secondary pipe and the air outlet are equipped with solenoid valves. The secondary pipe is connected to the middle chamber.

[0016] Furthermore, a support rod is fixedly connected inside the second partition, and the other end of the support rod is fixedly connected to the bottom of the recycling tank.

[0017] Furthermore, a rotating connector is rotatably connected to the support rod, and the rotating connector is connected to the air outlet pipe, so that gas can stably enter the airbag ring through the air outlet pipe when rotating.

[0018] To facilitate the rotation of the rotating shaft, a motor is fixedly connected to the top of the recycling tank. The output end of the motor passes through the recycling tank, and multiple sets of rotating rods are fixedly connected to the passing end. Multiple sets of rotating rods are rotatably connected to the support rod. The two ends of the rotating shaft are rotatably connected to rotating rods one and two, respectively.

[0019] Furthermore, a liquid inlet is installed on the partition, and a solenoid valve is installed inside the liquid inlet.

[0020] To facilitate the collection of the soaked and washed flocculent fishing nets, a collection hopper is installed in the upper chamber, and a filter cartridge is detachably installed on the collection hopper. The mixed liquid and fishing net debris entering the upper chamber will enter the collection hopper, the fishing net debris will remain in the filter cartridge, and the mixed liquid will flow back into the middle chamber through the liquid inlet.

[0021] To facilitate control of the inner diameter of the recycling tank, an air bladder wall is fixedly connected to the inner wall of the recycling tank, and an air inlet communicating with the air bladder wall is fixedly connected to the recycling tank.

[0022] A method for recycling plastics, used in a plastic recycling device, mainly includes the following operating steps:

[0023] Step 1: Place the fishing net into the shearing machine for cutting;

[0024] Step 2: Place the cut fishing net into a shredder for crushing to obtain a flocculent fishing net;

[0025] Step 3: Place the net into the recycling tank and pour in water until the water level is below the top of the inner tank to soak the net.

[0026] Step 4: Start the motor and air pump. The rotating shaft slowly rotates along the output end of the motor to stir the flocculent fishing net. The air bladder ring, which expands as gas enters, squeezes the flocculent fishing net against the air bladder wall. The gas discharged through the exhaust port blows up the flocculent fishing net that has sunk to the bottom.

[0027] Step 5: After soaking, turn off the motor and open the solenoid valve in the secondary pipe. Some gas will enter the inlet chamber, causing the mixed liquid to be discharged through the pressure valve of the outlet pipe and mixed with the flocculent fishing net in the water. Some gas will be discharged through the exhaust port, causing the flocculent fishing net and the mixed liquid to float on the water together.

[0028] Step 6: The continuously injected mixed liquid causes the fishing net mixture and the mixed liquid to flow into the collection hopper in the upper chamber, and finally into the filter cylinder;

[0029] Step 7: Remove the filter cartridge from the collection hopper through the top opening and open the discharge pipe to discharge the wastewater.

[0030] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention achieves efficient dehydration and precise collection of flocculent fishing nets through the design of extrusion dehydration and mixed liquid suspension separation, avoiding the problem of needing to soak for a long time to remove the internal residual impurities, and effectively improving the recycling efficiency. Attached Figure Description

[0031] In the attached diagram:

[0032] Figure 1 This is a schematic diagram of the structure of a plastic recycling device and its recycling method proposed in this invention;

[0033] Figure 2 This is a schematic cross-sectional view of a plastic recycling device and its recycling method proposed in this invention. Figure 1 ;

[0034] Figure 3 This is a schematic diagram of the structure of the motor, rotating rod one, rotating rod two, and airbag ring in the plastic recycling device and recycling method proposed in this invention. Figure 1 ;

[0035] Figure 4 This is a schematic cross-sectional view of a plastic recycling device and its recycling method proposed in this invention. Figure 2 ;

[0036] Figure 5 This invention proposes a plastic recycling device and its recycling method. Figure 4 A schematic diagram of the structure of part A;

[0037] Figure 6 This invention proposes a plastic recycling device and its recycling method. Figure 4 A structural diagram of section B;

[0038] Figure 7 This is a schematic diagram of the structure of the motor, rotating rod one, rotating rod two, and airbag ring in the plastic recycling device and recycling method proposed in this invention. Figure 2 .

[0039] In the diagram: 1. Recycling tank; 101. Top opening; 102. Discharge pipe; 201. Motor; 202. Rotating rod one; 203. Rotating rod two; 204. Rotating shaft; 205. Airbag ring; 206. Exhaust port; 3. Inner tank; 301. Support rod; 302. Partition one; 303. Partition two; 304. Liquid inlet; 305. Liquid outlet pipe; 4. Air pump; 401. Air inlet pipe; 402. Air outlet pipe; 403. Secondary pipe; 404. Rotary connector; 5. Collection hopper; 6. Filter cartridge; 7. Airbag wall; 701. Air inlet. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] Example: Refer to Figure 1 , Figure 2 , Figure 4 , Figure 5A plastic recycling device includes a recycling tank 1 with a top opening 101 and a discharge pipe 102 at the bottom. It also includes: multiple rotating shafts 204 arranged in a ring within the recycling tank 1; an airbag ring 205 fixedly connected to the rotating shafts 204; an inner tank 3 fixedly connected within the recycling tank 1, coaxially arranged, with its top away from the top of the recycling tank 1; a first partition 302 and a second partition 303 fixedly connected within the inner tank 3, dividing it into an upper chamber, a middle chamber, and a lower chamber, wherein the upper and lower chambers are open, and the middle chamber contains a mixed liquid; and multiple discharge pipes 305. The components are installed in a ring at equal intervals on the second partition 303. The liquid outlet pipe 305 is connected to the middle chamber and a pressure valve is installed inside the liquid outlet pipe 305. The liquid outlet pipe 305 is used to discharge the mixed liquid. The air pump 4 is fixedly connected to the lower chamber. The air inlet end of the air pump 4 is connected to the air inlet pipe 401, which is connected to the outside of the recycling tank 1. The air outlet end of the air pump 4 is connected to the air outlet pipe 402, which is connected to the air bag ring 205. The air bag ring 205 is provided with multiple sets of exhaust ports 206. The exhaust ports 206 near the bottom are inclined and face the bottom of the recycling tank 1. A one-way valve is installed inside the exhaust port 206. The first partition 302 is equipped with a liquid inlet 304, and a solenoid valve is installed inside the liquid inlet 304.

[0042] like Figure 4 As shown, a collection hopper 5 is installed in the upper chamber, and a filter cartridge 6 is detachably installed on the collection hopper 5. The mixed liquid and fishing net debris entering the upper chamber will enter the collection hopper 5, the fishing net debris will remain in the filter cartridge 6, and the mixed liquid will flow back into the middle chamber through the liquid inlet 304.

[0043] The shredded, flocculent fishing net is poured into the gap between the recycling tank 1 and the inner tank 3, and water is added. The flocculent fishing net is then stirred by the rotating shaft 204 that rotates along the axis of the recycling tank 1, and the fishing net fragments are squeezed by the air bladder ring 205 to squeeze out the water absorbed by the flocculent fishing net until the soaking treatment is completed. The mixed liquid is continuously discharged through the liquid outlet pipe 305. The mixed liquid carries the flocculent fishing net upwards, and finally the flocculent fishing net flows into the upper chamber with the mixed liquid.

[0044] The mixture in this application is a mineral oil mixture, prepared in the proportion of 85% mineral oil + 5% paraffin + 0.1% SDBS + 0.05% silicone oil (or 0.05% nano-SiO2, whichever is better).

[0045] In practice, the waste fishing net (made of polyethylene / nylon) is put into a shearing machine and cut into strips with a length of ≤10cm. Then, it is crushed into flocculent fishing net by a crusher. The flocculent fishing net is poured into the gap between the recycling tank 1 and the inner tank 3, and clean water is injected into the gap so that the water level is 20-40cm lower than the top of the inner tank 3.

[0046] Then, through the rotating shaft 204, the airbag ring 205 rotates synchronously, initially stirring the flocculent fishing net and dispersing it evenly in the water. After soaking for 30 minutes, the net fibers are softened and surface mud and sand are removed. By turning on the air pump 4 and adjusting the air output of the air pump 4, the size of the airbag ring 205 is dynamically changed. When the air intake is greater than the air output from the exhaust port 206, the airbag ring 205 expands. The expansion of the airbag ring 205 squeezes the fishing net debris to adhere to the inner wall of the recycling tank 1, achieving dynamic compression and dehydration of the flocculent fishing net and squeezing out as many impurities as possible from the net.

[0047] Meanwhile, the airbag ring 205 is equipped with multiple sets of exhaust ports 206, with only the bottom set of exhaust ports tilted (the angle is not limited and can be adjusted according to actual needs) and facing the bottom of the recycling tank 1. Its internal one-way valve opens to discharge gas, which impacts the fishing net at the bottom of the tank. The airflow carries the debris of the fishing net upward to prevent accumulation.

[0048] Specifically, a filter screen is installed inside the discharge pipe 102 to intercept fishing nets. Because fishing nets carry a lot of impurities, they will quickly pollute the clean water. At this time, by opening the discharge pipe 102, the sewage is continuously discharged and clean water is continuously injected. Observe the liquid flowing out of the discharge pipe 102 at the bottom of the recycling tank 1. When the discharged water is no longer as turbid as at the beginning, the discharge pipe 102 can be closed and the water supply stopped. After washing, continue to soak and stir.

[0049] Finally, the mixed liquid in the middle chamber is discharged through the outlet pipe 305 and mixed with the flocculent fishing net in the water. During this stage, the motor 201 remains stationary, while the exhaust port 206 continuously exhausts air, causing some of the bottom-sinking fishing net to float. Because the density of the mixed liquid is lower than that of water, SDBS reduces the interfacial tension, and silicone oil plays a corresponding role. The mixed liquid carries the fishing net debris upward, and at the same time, the flocculent fishing net is more likely to adhere to air bubbles and float more easily.

[0050] Since the water level is initially kept 20-40cm below the top of the inner tank 3, the mixed liquid and fishing net debris rise to the top along the gap between the recycling tank 1 and the inner tank 3, and flow into the collection hopper 5 in the upper chamber. The filter cartridge 6 at the bottom of the collection hopper 5 intercepts the fishing net debris, and the mixed liquid flows back to the middle chamber through the filter cartridge 6 and the liquid inlet 304 (solenoid valve open), forming a cycle. In this embodiment, the filter cartridge 6 is removed by inserting a magnetic suction rod into the top opening 101 to adsorb the filter cartridge 6, and then removing it from the top opening 101.

[0051] Specifically, such as Figure 5 As shown, a secondary pipe 403 is connected to the air outlet of the air pump 4. Both the secondary pipe 403 and the air outlet pipe 402 are equipped with solenoid valves. The secondary pipe 403 is connected to the middle chamber.

[0052] By opening the solenoid valve of the secondary pipe 403, the gas output from the air pump 4 is divided into two paths. Part of the gas enters the airbag ring 205 through the air outlet pipe 402 to maintain its dynamic expansion and compression state; the other part of the gas enters the middle chamber through the secondary pipe 403, which increases the pressure in the middle chamber (0.1-0.15MPa) and triggers the opening of the pressure valve of the liquid outlet pipe 305 (opening pressure 0.1MPa).

[0053] like Figure 4 As shown, a support rod 301 is fixedly connected inside the partition 303. The other end of the support rod 301 is fixedly connected to the bottom of the recycling tank 1. A rotating connector 404 is rotatably connected to the support rod 301. The rotating connector 404 is connected to the air outlet pipe 402 so that the gas can stably enter the airbag ring 205 through the air outlet pipe 402 when rotating.

[0054] Support rod 301 is used for the installation of inner tank 3. During the dynamic air supply process from air pump 4 to airbag ring 205, rotating shaft 204 drives airbag ring 205 to rotate and change size, and rotating connector 404 rotates synchronously to avoid air pipe twisting and air supply obstruction. This ensures that airbag ring 205 continuously and stably obtains gas throughout the entire process of dynamic extrusion and rotational stirring, maintaining an expansion-contraction dynamic state and ensuring the uniformity of fishing net extrusion and dehydration.

[0055] Furthermore, such as Figure 2 As shown in Figure 3, a motor 201 is fixedly connected to the top of the recycling tank 1. The output end of the motor 201 passes through the recycling tank 1, and multiple sets of rotating rods 1 202 are fixedly connected to the passing end. Multiple sets of rotating rods 203 are rotatably connected to the support rod 301. The two ends of the rotating shaft 204 are rotatably connected to the rotating rods 1 202 and 203 respectively.

[0056] By starting the motor 201, the rotation speed of the rotating shaft 204 is precisely controlled through the linkage of the rotating rod 202, rotating shaft 204, and rotating rod 203, so that the airbag ring 205 rotates stably to stir the fishing net, providing uniform power for soaking and squeezing.

[0057] Another implementation, such as Figure 4 , Figure 6 As shown, an airbag wall 7 is fixedly connected to the inner wall of the recycling tank 1, and an air inlet 701 communicating with the airbag wall 7 is fixedly connected to the recycling tank 1.

[0058] When the bladder ring 205 dynamically squeezes the fishing net, the bladder wall 7 provides a stable squeezing surface, enhancing the squeezing effect and allowing for more thorough water removal from the net. Simultaneously, the bladder wall 7 buffers the squeezing impact of the bladder ring 205, protecting the inner wall of the recycling tank 1 and extending the equipment's service life.

[0059] In simple terms, the overall process involves first pre-treating the discarded fishing nets by cutting them into strips and then crushing them into flocculent material. Clean water and the flocculent fishing nets are then injected into the gap between the recycling tank 1 and the inner tank 3. Motor 201 drives the rotating shaft 204 and airbag ring 205 to stir and soak the nets. Air pump 4 adjusts the air output to dynamically compress the fishing nets using the airbag ring 205. The bottom inclined exhaust port 206 helps prevent accumulation, squeezing out water which remains at the bottom of the gap and is discharged through the discharge pipe 102 (with a filter screen). Clean water is continuously added. After soaking, the secondary pipe 403 diverts gas to discharge the mixed liquid from the middle chamber. Motor 201 remains stationary, while the exhaust port 206 continuously vents air to help the bottom-dwelling fishing nets float. The mixed liquid carries the net fragments to the collection hopper 5, where the filter cartridge 6 intercepts the nets. The mixed liquid then circulates back through the inlet 304. Finally, the filter cartridge 6 is magnetically pulled out to collect the net fragments, completing the recycling process. The mixed liquid is replaced periodically.

[0060] A method for recycling plastics, used in a plastic recycling device, mainly includes the following operating steps:

[0061] Step 1: Place the fishing net into the shearing machine for cutting;

[0062] Step 2: Place the cut fishing net into a shredder for crushing to obtain a flocculent fishing net;

[0063] Step 3: Place the net into the recycling tank 1 and pour in water until the water level is below the top of the inner tank 3 to soak the net.

[0064] Step 4: Start the motor 201 and the air pump 4. The rotating shaft 204 slowly rotates along the output end of the motor 201 to stir the flocculent fishing net. The flocculent fishing net is squeezed onto the airbag wall 7 by the air bag ring 205 that is enlarged by the gas entering. The gas discharged through the exhaust port 206 blows up the flocculent fishing net that has sunk to the bottom.

[0065] Step 5: After soaking, turn off motor 201 and open the solenoid valve in the secondary pipe 403. Some gas will enter the inlet chamber, causing the mixed liquid to be discharged through the pressure valve of the outlet pipe 305 and mixed with the flocculent fishing net in the water. Some gas will be discharged through the exhaust port 206, causing the flocculent fishing net and the mixed liquid to float on the water together.

[0066] Step 6: The continuously injected mixed liquid causes the fishing net mixture and the mixed liquid to flow into the collection hopper 5 in the upper chamber, and finally into the filter cylinder 6;

[0067] Step 7: Remove the filter cartridge 6 from the collection hopper 5 through the top opening 101, and open the discharge pipe 102 to discharge the sewage.

[0068] This invention achieves efficient dehydration and precise collection of flocculent fishing nets through a design of extrusion dehydration and suspension separation of the mixed liquid, avoiding the problem of needing to soak for a long time to remove the internal impurities, and effectively improving the recycling efficiency.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A plastic recycling device, comprising a recycling tank (1), the recycling tank (1) having a top opening (101) and a discharge pipe (102) at the bottom of the recycling tank (1), characterized in that, Also includes: Multiple sets of rotating shafts (204) are arranged in a ring inside the recycling tank (1); The airbag ring (205) is fixedly connected to the rotating shaft (204); The inner tank (3) is fixedly connected inside the recycling tank (1), is coaxially arranged, and the top of the inner tank (3) is far away from the top of the recycling tank (1); Partition 1 (302) and partition 2 (303) are both fixedly connected inside the inner tank (3). Through partition 1 (302) and partition 2 (303), the inner tank (3) is divided into an upper chamber, a middle chamber and a lower chamber. The upper chamber and the lower chamber are both open. The middle chamber is filled with mixed liquid. Multiple sets of liquid outlet pipes (305) are installed in a ring at equal intervals on the second partition (303). The liquid outlet pipes (305) are connected to the middle chamber, and a pressure valve is installed inside the liquid outlet pipes (305). The liquid outlet pipes (305) are used to discharge the mixed liquid. An air pump (4) is fixedly connected to the lower chamber. An air inlet pipe (401) is connected to the air inlet end of the air pump (4). The air inlet pipe (401) is connected to the outside of the recycling tank (1). An air outlet pipe (402) is connected to the air outlet end of the air pump (4). The air outlet pipe (402) is connected to the airbag ring (205). The shredded, flocculent fishing net is poured into the gap between the recycling tank (1) and the inner tank (3), and water is added. The flocculent fishing net is then stirred by the rotating shaft (204) that rotates along the axis of the recycling tank (1), and the fishing net fragments are squeezed by the airbag ring (205) to squeeze out the water absorbed by the flocculent fishing net until the soaking treatment is completed. The mixed liquid is continuously discharged through the liquid outlet pipe (305), and the mixed liquid will carry the flocculent fishing net upwards. Finally, the flocculent fishing net will flow into the upper chamber with the mixed liquid.

2. The plastic recycling device according to claim 1, characterized in that, The airbag ring (205) is provided with multiple sets of exhaust ports (206), with the exhaust port (206) near the bottom being inclined and facing the bottom of the recycling tank (1), and a one-way valve is provided inside the exhaust port (206).

3. A plastic recycling device according to claim 2, characterized in that, The air pump (4) has a secondary pipe (403) connected to its outlet end. Both the secondary pipe (403) and the outlet pipe (402) are equipped with solenoid valves. The outlet end of the secondary pipe (403) is connected to the middle chamber.

4. A plastic recycling device according to claim 3, characterized in that, A support rod (301) is fixedly connected inside the partition plate 2 (303), and the other end of the support rod (301) is fixedly connected to the bottom of the recycling tank (1).

5. A plastic recycling device according to claim 4, characterized in that, A rotating connector (404) is rotatably connected to the support rod (301). The rotating connector (404) is connected to the air outlet pipe (402) so that gas can stably enter the airbag ring (205) through the air outlet pipe (402) when rotating.

6. A plastic recycling device according to claim 5, characterized in that, A motor (201) is fixedly connected to the top of the recycling tank (1). The output end of the motor (201) passes through the recycling tank (1), and multiple sets of rotating rods (202) are fixedly connected to the passing end. Multiple sets of rotating rods (203) are rotatably connected to the support rod (301). The two ends of the rotating shaft (204) are rotatably connected to the rotating rods (202) and the rotating rods (203) respectively.

7. A plastic recycling device according to claim 6, characterized in that, A liquid inlet (304) is installed on the partition (302), and a solenoid valve is installed inside the liquid inlet (304).

8. A plastic recycling device according to claim 7, characterized in that, The upper chamber is equipped with a collection hopper (5), and a filter cartridge (6) is detachably installed on the lower end of the collection hopper (5). The mixed liquid and fishing net debris entering the upper chamber will enter the collection hopper (5), the fishing net debris will remain in the filter cartridge (6), and the mixed liquid will flow back into the middle chamber through the liquid inlet (304).

9. A plastic recycling device according to claim 8, characterized in that, An airbag wall (7) is fixedly connected to the inner wall of the recycling tank (1), and an air inlet (701) communicating with the airbag wall (7) is fixedly connected to the recycling tank (1).

10. A method for recycling plastics, used in the plastic recycling apparatus of claim 9, characterized in that, The main operating steps include the following: Step 1: Place the fishing net into the shearing machine for cutting; Step 2: Place the cut fishing net into a shredder for crushing to obtain a flocculent fishing net; Step 3: Place the net into the recycling tank (1) and pour in water until the water level is below the top of the inner tank (3) to soak the net. Step 4: Start the motor (201) and air pump (4). The rotating shaft (204) slowly rotates along the output end of the motor (201) to stir the flocculent fishing net. The flocculent fishing net is squeezed onto the airbag wall (7) by the airbag ring (205) that is enlarged by the gas entering. The gas discharged through the exhaust port (206) blows up the flocculent fishing net that has sunk to the bottom. Step 5: After soaking, turn off the motor (201), open the solenoid valve in the secondary pipe (403), and some gas will enter the inlet chamber, so that the mixed liquid is discharged through the pressure valve of the outlet pipe (305) and mixed with the flocculent fishing net in the water. Some gas is discharged through the exhaust port (206), so that the flocculent fishing net and the mixed liquid float on the water together. Step 6: The continuously injected mixed liquid causes the fishing net mixture and the mixed liquid to flow into the collection hopper (5) in the upper chamber, and finally into the filter cylinder (6); Step 7: Remove the filter cartridge (6) from the collection hopper (5) through the top opening (101) and open the discharge pipe (102) to discharge the sewage.

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