A composite sealing ring waste recovery device and recycling method

Abstract

The application discloses a kind of composite sealing ring waste recovery device and recycling method, it is related to solid waste harmless treatment field, including recycling processing box, rotating cylinder is rotationally arranged in the recycling processing box, rotating cylinder is arranged obliquely, composite sealing ring is thermally decomposed in rotating cylinder and forms copper sheet, silicon dioxide, carbon dioxide and water, the lower portion of the rotating cylinder is provided with filter box, the upper end of the filter box is provided with filter screen, filter layer is installed on the side of filter box away from switching chamber, the outside of recycling processing box is provided with air pump, oxygen supply pipe, exhaust pipe and recovery pipeline are arranged on the air pump.The application can decompose composite sealing ring into copper sheet with copper oxide on the surface, silicon dioxide, carbon dioxide and water at high temperature, achieve the purpose of harmless thermal decomposition treatment, and the byproducts such as decomposed copper sheet, carbon dioxide and silicon dioxide can be used in the second industry, to realize industrial chain.

Description

Technical Field

[0001] This invention relates to the field of harmless treatment of solid waste, and in particular to a composite sealing ring waste recycling device and a method for recycling and reusing it. Background Technology

[0002] The recycling and processing of composite sealing ring waste generally involves the following steps:

[0003] 1) Sorting and cleaning: Sorting out used sealing rings, removing impurities such as metal and plastic, and performing high-temperature or chemical cleaning to remove oil stains.

[0004] 2) Preliminary crushing: Use a claw-type pre-crusher to cut the sealing ring into fragments with a diameter of about 0.5cm.

[0005] 3) Refined grinding

[0006] Micro-grinding and sorting: The particles are further ground into 10-40 mesh micro-powder using a vertical shaft reflective micro-grinding mill, and then airflow is used to sort the qualified particles (for regeneration) and the unqualified particles (for recycling).

[0007] 4) Recycling

[0008] Compression molding: The process of mixing micro powder with adhesive and then using a high-temperature and high-pressure process to produce new sealing rings or other rubber products.

[0009] However, this method is only suitable for processing sealing rings composed of a single rubber product. Therefore, it is necessary to propose a composite sealing ring waste recycling device and a recycling and reuse method to solve the above problems. Summary of the Invention

[0010] The purpose of this invention is to provide a composite sealing ring waste recycling device and a recycling and reuse method to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a composite sealing ring waste recycling device, comprising a recycling and processing box, wherein a rotating cylinder is rotatably arranged in the recycling and processing box, the rotating cylinder is inclined, and the composite sealing ring is thermally decomposed in the rotating cylinder to form copper sheet, silicon dioxide, carbon dioxide and water;

[0012] The upper end of the rotating cylinder is provided with a feeding pipe that communicates with the outside of the recycling and processing box. The lower end of the rotating cylinder is provided with a separation port for the copper sheet formed after the thermal decomposition of the composite sealing ring to be discharged. The lower end of the recycling and processing box is provided with a transfer chamber for the copper sheet to fall into. The lower end of the transfer chamber is connected to the separation and recycling box.

[0013] A filter box is located below the rotating cylinder, and a filter screen is installed on the upper end of the filter box. A filter layer is installed on the side of the filter box away from the transfer chamber. An air pump is installed outside the recycling and processing box. An oxygen supply pipe, an exhaust pipe, and a recycling pipe are installed on the air pump. The end of the recycling pipe faces the separation port. The exhaust pipe connects to the inside of the filter box. An external composite pipe is installed outside the exhaust pipe. An external interlayer channel is formed between the external composite pipe and the exhaust pipe. An oxygen supply pipe is connected to one end of the external interlayer channel and is connected to an external oxygen tank. The other end of the external interlayer channel is connected to the oxygen supply pipe.

[0014] Preferably, a groove is provided on the lower inner wall of the transfer chamber, and a rubber tube opening is integrally provided at the bottom of the groove. The discharge port above the separation and recycling box is connected to the rubber tube opening. A discharge plate is rotatably connected in the groove through a rotating rod, and a torsion spring is provided at the connection between the rotating rod and the discharge plate.

[0015] Preferably, the rotating cylinder is provided with a plurality of sieve holes, which simultaneously connect the inside and outside of the rotating cylinder.

[0016] Preferably, a motor for driving the rotating drum is installed at the lower end of the recycling bin.

[0017] Preferably, an absorption treatment box is provided at the connection between the discharge pipe and the air pump.

[0018] Preferably, the upper end of the feed pipe is provided with a sealing cap that can be opened and closed.

[0019] Preferably, the bottom of the recycling bin is provided with support legs.

[0020] Preferably, a pressure relief mechanism is provided above the recycling tank.

[0021] Preferably, an electric heating plate is installed on the inner wall of the recycling tank.

[0022] This invention provides a method for recycling and reusing composite sealing ring waste, comprising the following steps:

[0023] S1: Thermal decomposition, the composite sealing ring is sent into the sealed chamber for thermal decomposition. The thermal decomposition temperature is 400°C to 550°C. During the thermal decomposition process, the composite sealing ring undergoes mixed movement in the chamber. Oxygen is provided to the sealed chamber during the thermal decomposition process. After thermal decomposition, copper sheets, silicon dioxide, carbon dioxide and water are formed.

[0024] S2: Separation, separating copper sheet, silicon dioxide, carbon dioxide and water;

[0025] Among them, the copper sheet is large in volume and is screened down by gravity, while the silica particles are small and are separated by a filter structure set in the chamber. Water is evaporated and carbon dioxide is extracted by a mechanism that supplies oxygen to the chamber.

[0026] The extracted carbon dioxide contains a small amount of oxygen. The carbon dioxide is separated and absorbed by chemical methods to form carbonate byproducts. The remaining oxygen is recycled into a sealed chamber for use.

[0027] S3: The pipes that supply oxygen to the sealed chamber are distributed along the pipes that extract carbon dioxide from the chamber. The oxygen is heated by the residual heat in the carbon dioxide and then supplied to the sealed chamber for use.

[0028] S4: The separation of copper sheets, silicon dioxide, carbon dioxide and water is completed in a sealed chamber, reducing the loss of heat and gas.

[0029] The technical effects and advantages of this invention are as follows:

[0030] This invention can decompose composite sealing rings into copper sheets with copper oxide on the surface, silicon dioxide, carbon dioxide and water at high temperature, achieving the purpose of harmless thermal decomposition treatment. The decomposed copper sheets, carbon dioxide and silicon dioxide and other by-products can be used in the secondary industry, realizing the industrial chain.

[0031] The method for recycling composite sealing rings of the present invention achieves the separation of copper sheet, silicon dioxide, carbon dioxide and water, and can make full use of residual oxygen and waste heat in the gas to reduce the energy consumption of the overall device, and can form by-products.

[0032] The entire recycling unit operates within a sealed space, preventing heat and gas leakage, thus saving energy and protecting the environment. The circulating gas supply further enhances the separation of copper sheets, silica, carbon dioxide, and water, preventing silica impurities from mixing with the copper sheets. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the composite sealing ring structure of the present invention.

[0034] Figure 2 This is a schematic diagram of the composite sealing ring waste recycling device of the present invention from one perspective.

[0035] Figure 3 This is a schematic diagram of the composite sealing ring waste recycling device of the present invention from another perspective.

[0036] Figure 4 This is a three-dimensional structural cross-sectional view of the composite sealing ring waste recycling device of the present invention.

[0037] Figure 5This is a cross-sectional view of the composite sealing ring waste recycling device of the present invention.

[0038] Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0039] Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B.

[0040] In the diagram: 100, substrate; 200, heat-conducting layer; 1, recycling tank; 2, feed pipe; 3, sealing cover; 4, pressure relief mechanism; 5, oxygen supply pipe; 6, outer composite pipe; 7, oxygen supply pipe; 8, discharge pipe; 9, air pump; 10, absorption tank; 11, support leg; 12, recycling pipe; 13, separation and recycling tank; 14, motor; 15, electric heating plate; 16, rotating cylinder; 17, sieve hole; 18, drive connecting shaft; 19, unloading plate; 20, filter box; 21, filter screen; 22, filter layer; 23, feed channel; 24, outer interlayer channel; 25, separation port; 26, discharge port; 27, groove; 28, rubber tube port; 29, rotating rod. Detailed Implementation

[0041] This invention provides, for example Figures 1-7 The invention relates to a composite sealing ring waste recycling device and a recycling and reuse method.

[0042] In existing technologies, thermally conductive composite seals typically consist of four main parts:

[0043] Part 1: Thermally conductive materials. This is the core component of thermal pads. Common thermally conductive materials include rubber, silicone rubber, silicone grease, and silver paste. These materials can effectively conduct heat, quickly transferring the heat from electronic devices to the heat sink, thereby reducing the device temperature.

[0044] Part Two: Substrate: The substrate is typically a flexible material, such as polytetrafluoroethylene (PTFE), polyimide film, polyamide film, copper sheet, etc. The substrate serves to provide support and protection for the thermally conductive material, while also possessing certain insulating properties.

[0045] Part Three: Adhesive: To bond the thermal pads to electronic devices and heat sinks, a certain amount of adhesive is required. This adhesive is typically a high-temperature glue that maintains stable adhesion at high temperatures.

[0046] Part 4: Other Additives: Depending on the specific application requirements, thermal pads may also have other ingredients added, such as fillers and antioxidants, to improve their performance and service life.

[0047] refer to Figure 1As shown, the present invention provides a composite sealing ring, which is made of a substrate 100 (copper sheet) and a thermally conductive layer 200 (silicone rubber). The copper sheet can maintain the basic hardness and shape of the composite sealing ring, and when the composite sealing ring is applied to a sealed object, it can avoid the phenomenon of decreased sealing performance caused by excessive deformation. The silicone rubber covers the outer periphery of the copper sheet, which serves to increase the flexibility and buffering performance of the composite sealing ring. Since the silicone rubber can deform to a certain extent to adapt to the shape of the sealing position, the composite sealing ring can ensure good sealing performance.

[0048] Silicone rubber is an elastic material with excellent properties. When exposed to high temperatures (400°C to 550°C), it undergoes a thermal decomposition reaction, forming siloxanes, silicon dioxide, and organic matter. Siloxanes are one of the main components of the thermal decomposition of silicone rubber; they are composed of silicon and oxygen atoms and possess high stability and chemical inertness. Siloxanes undergo oxidation at high temperatures, further decomposing into silicon dioxide and gas.

[0049] The organic matter mainly comes from the decomposition of the organic components of silicone rubber and contains elements such as carbon, hydrogen and oxygen. These organic substances have a certain degree of volatility and flammability, so they are prone to producing smoke and harmful gases at high temperatures.

[0050] Ultimately, the thermal decomposition products of silicone rubber mainly include silicon dioxide and organic matter. The elements such as carbon, hydrogen, and oxygen in the organic matter are eventually converted into carbon dioxide and water through high-temperature combustion (there may be a small amount of impurities, such as ash produced when the carbon is impure). Therefore, silicone rubber is ultimately thermally decomposed into silicon dioxide, carbon dioxide, and water (possibly containing a small amount of impurities).

[0051] When the copper sheet is heated to a high temperature of 400℃ to 550℃, its surface begins to oxidize, forming black copper oxide (CuO).

[0052] Therefore, the final products of the composite sealing ring after decomposition at high temperatures of 400°C to 550°C are copper sheets with copper oxide on the surface, silicon dioxide, carbon dioxide, and water (possibly containing a small amount of impurities).

[0053] refer to Figure 4 As shown in the figure, the present invention provides a composite sealing ring waste recycling device, which includes a recycling processing box 1, a rotating cylinder 16 is provided in the recycling processing box 1, the rotating cylinder 16 is arranged at an inclination, the composite sealing ring is located inside the rotating cylinder 16 and undergoes thermal decomposition inside the rotating cylinder 16.

[0054] The upper end of the rotating cylinder 16 is integrally provided with a feed pipe 2, and the lower end of the rotating cylinder 16 is fixedly connected to a drive connecting shaft 18. Both the feed pipe 2 and the drive connecting shaft 18 are rotatably connected to the recycling and processing box 1. The end of the feed pipe 2 that extends out of the recycling and processing box 1 is provided with an openable sealing cover 3. The bottom side of the recycling and processing box 1 is connected to a motor 14 through a bracket. The rotating shaft of the motor 14 is fixedly connected to the drive connecting shaft 18. When the motor 14 is started, the rotating shaft drives the screen hole 17, the electric heating plate 15 and the feed pipe 2 to rotate, thereby mixing the composite sealing ring inside the rotating cylinder 16.

[0055] An electric heating plate 15 is fixedly installed on the inner wall of the recycling tank 1. The electric heating plate 15 can heat the composite sealing ring inside the rotating cylinder 16. During the heating process, the composite sealing ring makes mixed movement, so that the composite sealing ring is heated evenly. When the temperature of the composite sealing ring reaches 400°C to 550°C, it is decomposed into copper sheets of copper oxide, silicon dioxide, carbon dioxide and water.

[0056] The rotating cylinder 16 has a plurality of sieve holes 17 evenly arranged on it. The sieve holes 17 are used for the discharge of silica, carbon dioxide and water. (Reference) Figure 5 and Figure 7 As shown, the bottom of the rotating cylinder 16 is provided with a separation port 25. The diameter of the separation port 25 is smaller than the diameter of the composite sealing ring but larger than the diameter of the copper sheet with copper oxide. Therefore, the copper sheet with copper oxide can eventually fall out through the separation port 25.

[0057] A filter box 20 is installed inside the lower end of the recycling tank 1, and a filter screen 21 is installed above the filter box 20. Silica and water discharged from the sieve holes 17 can fall into the filter box 20 through the filter screen 21 and be collected. A filter layer 22 is installed at the outlet of the filter box 20 to prevent further discharge of impurities. The water is a small amount, which is usually evaporated and discharged inside the recycling tank 1. It should be noted that a pressure relief mechanism 4, such as a pressure relief valve, is provided on the recycling tank 1 to control the internal pressure, which will not be described in detail here.

[0058] The other side of the filter box 20 forms a transfer chamber with the interior of the recycling box 1. The transfer chamber is located below the separation port 25. A groove 27 is provided on the inner wall below the transfer chamber. A rubber tube port 28 is integrally provided at the bottom of the groove 27. A separation recycling box 13 is installed at the bottom of the recycling box 1. The discharge port 26 above the separation recycling box 13 is connected to the rubber tube port 28. A discharge plate 19 is rotatably connected in the groove 27 via a rotating rod 29. A torsion spring is provided at the connection between the rotating rod 29 and the discharge plate 19. When the copper sheet that falls out from the separation port 25 lands on the surface of the discharge plate 19, the discharge plate 19 opens downward due to the pressure of gravity, and the copper sheet enters the separation recycling box 13 for collection. After the copper sheet enters the separation recycling box 13, the discharge plate 19 is reset by the force of the torsion spring.

[0059] In this invention, the separation and recycling box 13 for collecting copper sheets and the recycling processing box 1 can also form a sealed chamber, ensuring the thermal decomposition efficiency of the composite sealing ring. When the separation and recycling box 13 is full of copper sheets, it can be replaced with an empty separation and recycling box 13. The bottom of the recycling processing box 1 is provided with support legs 11 for supporting the recycling processing box 1, which facilitates the installation and docking of the separation and recycling box 13.

[0060] refer to Figures 2 to 7 As shown, an air pump 9 is installed on the side of the recycling tank 1. The air pump 9 is equipped with an oxygen supply pipe 7, a recycling pipe 12, and an exhaust pipe 8. The exhaust pipe 8 is connected to the inside of the filter box 20. When the air pump 9 is activated, it generates suction in the filter box 20, causing silica, carbon dioxide, and water inside the recycling tank 1 to be collected into the filter box 20. The recycling pipe 12 is connected to the inside of the recycling tank 1, with the connection point facing the separation port 25. An oxygen tank is also connected to the air pump 9, and the air pump 9 draws oxygen from the oxygen tank to supply oxygen to the separation port 25. The oxygen is positioned near the outlet 25, allowing it to enter the feed pipe 2 and supply oxygen to the silicone rubber inside. This sufficient oxygen supply enables the silicone rubber to decompose into silica, carbon dioxide, and water. Furthermore, because the oxygen enters from the outlet 25, silica, carbon dioxide, and water are prevented from falling into the separation and recovery tank 13. Only the heavier copper sheets can pass through the outlet 25 into the separation and recovery tank 13, thus separating the copper sheets from the silica, carbon dioxide, and water.

[0061] An absorption treatment box 10 is installed at the connection between the discharge pipe 8 and the air pump 9. Sodium hydroxide or calcium hydroxide is placed in the absorption treatment box 10. During the process of the air pump 9 extracting the gas inside the recovery treatment box 1, carbon dioxide enters the absorption treatment box 10 and reacts with the alkali to form carbonate, while oxygen does not react, thus separating oxygen. The carbonate can generate by-products in subsequent recovery treatment. Therefore, the gas after passing through the absorption treatment box 10 is only oxygen, which is then combined with the oxygen in the oxygen tank and supplied to the inside of the recovery treatment box 1.

[0062] In this invention, the oxygen cylinder is actually connected to the oxygen supply pipe 5. An outer composite pipe 6 is sleeved on the outer ring of the discharge pipe 8. An outer interlayer channel 24 is formed between the outer composite pipe 6 and the discharge pipe 8. The oxygen in the oxygen cylinder can pass through the outer interlayer channel 24 and be heated by the residual heat of the gas in the discharge pipe 8, so that the oxygen supplied into the recovery and treatment box 1 has a certain amount of heat, which achieves the energy-saving effect. The oxygen supply pipe 5 is located at the end of the outer composite pipe 6 near the recovery and treatment box 1, and the end of the outer composite pipe 6 away from the oxygen supply pipe 5 is connected to the oxygen supply pipe 7. The oxygen supply pipe 7 is then connected to the air pump 9.

[0063] In this composite sealing ring waste recycling device, the method for recycling composite sealing rings achieves the separation of copper sheets, silica, carbon dioxide, and water. It can also make full use of the residual oxygen and waste heat in the gas to reduce the overall energy consumption of the device and generate by-products. The entire recycling device is processed in a sealed space, avoiding heat and gas leakage, which is energy-saving and environmentally friendly. The circulation of gas supply can further enhance the separation effect of copper sheets, silica, carbon dioxide, and water, and prevent silica impurities from mixing with copper sheets.

Claims

1. A composite sealing ring waste recycling device, comprising a recycling and processing tank (1), characterized in that: The recycling tank (1) is equipped with a rotating cylinder (16) which is arranged at an angle. The composite sealing ring is thermally decomposed in the rotating cylinder (16) to form copper sheets, silicon dioxide, carbon dioxide and water. The upper end of the rotating cylinder (16) is provided with a feed pipe (2) that communicates with the outside of the recycling and processing box (1). The lower end of the rotating cylinder (16) is provided with a separation port (25) for the copper sheet formed after the thermal decomposition of the composite sealing ring to be discharged. The lower end of the recycling and processing box (1) is provided with a transfer chamber for the copper sheet to fall into. The lower end of the transfer chamber is connected to the separation and recycling box (13). The separation and recycling box (13) and the recycling and processing box (1) form a sealed chamber. A filter box (20) is provided below the rotating cylinder (16). A filter screen (21) is provided at the upper end of the filter box (20). A filter layer (22) is installed on the side of the filter box (20) away from the transfer chamber. An air pump (9) is provided outside the recycling tank (1). An oxygen supply pipe (7), an exhaust pipe (8) and a recycling pipe (12) are provided on the air pump (9). The end of the recycling pipe (12) faces the separation port (25). The exhaust pipe (8) is connected to the inside of the filter box (20). An external composite pipe (6) is provided outside the exhaust pipe (8). An external interlayer channel (24) is formed between the external composite pipe (6) and the exhaust pipe (8). An oxygen supply pipe (5) is connected to one end of the external interlayer channel (24). The oxygen supply pipe (5) is connected to an external oxygen tank. The other end of the external interlayer channel (24) is connected to the oxygen supply pipe (7). When the air pump (9) is started, oxygen is supplied to the recycling treatment box (1) through the oxygen supply pipe (5), the outer interlayer channel (24), the oxygen supply pipe (7) and the recycling pipe (12) in sequence. The silicone rubber in the recycling treatment box (1) is thermally decomposed under the condition of oxygen supply and heating to form carbon dioxide and water. Carbon dioxide is drawn into the absorption treatment box (10) from the discharge pipe (8). Carbon dioxide reacts with the alkali in the absorption treatment box (10) to form carbonate, and oxygen is separated. The oxygen is then supplied to the recycling treatment box (1) through the air pump (9) and the recycling pipe (12).

2. The composite sealing ring waste recycling device according to claim 1, characterized in that: The inner wall below the transfer chamber is provided with a groove (27), and a rubber tube opening (28) is integrally provided at the bottom of the groove (27). The discharge port (26) above the separation and recycling box (13) is connected to the rubber tube opening (28). A discharge plate (19) is rotatably connected in the groove (27) through a rotating rod (29). A torsion spring is provided at the connection between the rotating rod (29) and the discharge plate (19).

3. The composite sealing ring waste recycling device according to claim 1, characterized in that: The rotating cylinder (16) is provided with a number of sieve holes (17), which simultaneously connect the inside and outside of the rotating cylinder (16).

4. The composite sealing ring waste recycling device according to claim 1, characterized in that: The lower end of the recycling bin (1) is equipped with a motor (14) that drives the rotating cylinder (16) to rotate.

5. The composite sealing ring waste recycling device according to claim 1, characterized in that: An absorption treatment box (10) is provided at the connection between the discharge pipe (8) and the air pump (9).

6. The composite sealing ring waste recycling device according to claim 1, characterized in that: The upper end of the feed pipe (2) is equipped with a sealing cap (3) that can be opened and closed.

7. The composite sealing ring waste recycling device according to claim 1, characterized in that: The bottom of the recycling bin (1) is provided with support legs (11).

8. The composite sealing ring waste recycling device according to claim 1, characterized in that: A pressure relief mechanism (4) is provided above the recycling tank (1).

9. The composite sealing ring waste recycling device according to claim 1, characterized in that: An electric heating plate (15) is installed on the inner wall of the recycling tank (1).

10. A method for recycling and reusing composite sealing ring waste, characterized in that: The composite sealing ring waste recycling device according to any one of claims 3-9 further includes the following steps: S1: Thermal decomposition. The composite sealing ring is sent into the sealed chamber and rotated in the cylinder for thermal decomposition. The thermal decomposition temperature is 400℃ to 550℃. During the thermal decomposition process, the composite sealing ring undergoes mixed motion in the chamber. Oxygen is supplied to the sealed chamber during the thermal decomposition process. After thermal decomposition, copper sheets, silicon dioxide, carbon dioxide and water are formed. S2: Separation, separating copper sheet, silicon dioxide, carbon dioxide and water; Among them, the copper sheet is large in volume and is sieved downward through the separation port of the rotating cylinder by gravity. The silica particles are small and are separated by the sieve holes (17) set on the rotating cylinder (16). Water is evaporated and carbon dioxide is extracted by the mechanism that supplies oxygen to the chamber. The extracted carbon dioxide contains a small amount of oxygen. The carbon dioxide is separated and absorbed by chemical methods to form carbonate byproducts. The remaining oxygen is recycled into a sealed chamber for use. S3: The pipes that supply oxygen to the sealed chamber are distributed along the pipes that extract carbon dioxide from the chamber. The oxygen is heated by the residual heat in the carbon dioxide and then supplied to the sealed chamber for use.

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