CN119972755A - Composite sealing ring waste recovery device and recovery and reuse method - Google Patents
Composite sealing ring waste recovery device and recovery and reuse method Download PDFInfo
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- CN119972755A CN119972755A CN202510362321.4A CN202510362321A CN119972755A CN 119972755 A CN119972755 A CN 119972755A CN 202510362321 A CN202510362321 A CN 202510362321A CN 119972755 A CN119972755 A CN 119972755A
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Abstract
The invention discloses a composite seal ring waste recycling device and a recycling method, which relate to the field of solid waste harmless treatment, and comprise a recycling treatment box, wherein a rotary cylinder is rotatably arranged in the recycling treatment box, the rotary cylinder is obliquely arranged, a composite seal ring is thermally decomposed in the rotary cylinder to form copper sheets, silicon dioxide, carbon dioxide and water, the filter comprises a rotary cylinder, and is characterized in that a filter box is arranged below the rotary cylinder, a filter screen is arranged at the upper end of the filter box, a filter layer is arranged on one side, far away from the switching cavity, of the filter box, an air pump is arranged outside the recovery processing box, and an oxygen supply pipe, an exhaust pipe and a recovery pipe are arranged on the air pump. According to the invention, the composite sealing ring can be decomposed into the copper sheet with the copper oxide on the surface, the silicon dioxide, the carbon dioxide and the water at high temperature, so that the aim of harmless thermal decomposition treatment is fulfilled, and the decomposed copper sheet, the decomposed byproducts such as the carbon dioxide and the silicon dioxide can be put into a second industry for use, and an industrial chain is realized.
Description
Technical Field
The invention relates to the field of harmless treatment of solid waste, in particular to a waste recycling device of a composite sealing ring and a recycling method.
Background
When the waste material of the composite sealing ring is recycled, the waste material is generally subjected to the following steps:
1) classification cleaning , namely classifying the waste sealing rings, removing impurities such as metal, plastic and the like, and performing high-temperature or chemical cleaning to remove greasy dirt .
2) Preliminary crushing the seal was cut into pieces of about 0.5 a cm a diameter using an eagle claw pre-crusher.
3) Finely pulverizing
Micronizing and sorting , further grinding into 10-40 mesh micropowder by a vertical shaft reflection type micronizer, and sorting up-to-standard particles (for regeneration) and up-to-standard particles (recycling) by utilizing air flow.
4) Regeneration
Compression molding mixing the micropowder with binder, and making into new sealing ring or other rubber products by high temperature and high pressure process.
However, this method is only suitable for processing a seal ring composed of a single rubber product, and therefore, it is necessary to provide a composite seal ring waste recycling device and a recycling method to solve the above problems.
Disclosure of Invention
The invention aims to provide a composite sealing ring waste recycling device and a recycling method, which are used for solving the problems in the background technology.
In order to achieve the aim, the invention provides the technical scheme that the waste recovery device for the composite sealing ring comprises a recovery processing box, wherein a rotating cylinder is rotatably arranged in the recovery processing box, the rotating cylinder is obliquely arranged, and the composite sealing ring is thermally decomposed in the rotating cylinder to form copper sheets, silicon dioxide, carbon dioxide and water;
the upper end of the rotary cylinder is provided with a feeding pipeline communicated with the outside of the recovery processing box, the lower end of the rotary cylinder is provided with a separating port for discharging copper sheets formed after the thermal decomposition of the composite sealing ring, the lower end of the recovery processing box is internally provided with a switching cavity for falling copper sheets, and the lower end of the switching cavity is in butt joint with the separation recovery box;
The filter device is characterized in that a filter box is arranged below the rotating cylinder, a filter screen is arranged at the upper end of the filter box, a filter layer is arranged on one side, far away from the switching cavity, of the filter box, an air pump is arranged outside the recovery treatment box, an oxygen supply pipe, an exhaust pipe and a recovery pipe are arranged on the air pump, the end part of the recovery pipe faces the separating opening, the exhaust pipe is communicated with the inside of the filter box, an outer composite pipe is arranged outside the exhaust pipe, an outer interlayer channel is formed between the outer composite pipe and the exhaust pipe, an oxygen supply pipe is arranged at one end of the outer interlayer channel in a communicating manner, the oxygen supply pipe is connected with an external oxygen tank, and the other end of the outer interlayer channel is communicated with the oxygen supply pipe.
Preferably, the inner wall below the transfer cavity is provided with a groove, the bottom of the groove is integrally provided with a rubber pipe orifice, a discharge hole above the separation and recovery box is in butt joint with the rubber pipe orifice, a stripper plate is rotationally connected in the groove through a rotating rod, and a torsion spring is arranged at the joint of the rotating rod and the stripper plate.
Preferably, the rotating cylinder is provided with a plurality of sieve holes, and the sieve holes are simultaneously communicated with the inside and the outside of the rotating cylinder.
Preferably, a motor for driving the rotating cylinder to rotate is arranged at the lower end of the recovery processing box.
Preferably, an absorption treatment box is arranged at the joint of the discharge pipeline and the absorption treatment box.
Preferably, a sealing cover is arranged at the upper end of the feeding pipeline in an open-close mode.
Preferably, the bottom of the recovery processing box is provided with supporting legs.
Preferably, a pressure release mechanism is arranged above the recovery processing box.
Preferably, an electric heating plate is mounted on the inner wall of the recovery processing box.
The invention provides a method for recycling waste materials of a composite sealing ring, which comprises the following steps:
S1, thermal decomposition, namely sending the composite sealing ring into a sealed cavity for thermal decomposition, wherein the thermal decomposition temperature is 400-550 ℃, the composite sealing ring is enabled to do mixed motion in the cavity in the thermal decomposition process, oxygen is provided to the sealed cavity in the thermal decomposition process, and copper sheets, silicon dioxide, carbon dioxide and water are formed after thermal decomposition;
S2, separating copper sheets, silicon dioxide, carbon dioxide and water;
The copper sheet is large in volume, the copper sheet is screened downwards by utilizing gravity, silicon dioxide particles are small, a filter screen structure is arranged in the cavity for separation, water is evaporated, and carbon dioxide is extracted by utilizing a mechanism for providing oxygen to the cavity;
the extracted carbon dioxide contains a small amount of oxygen, the carbon dioxide is separated and absorbed by adopting a chemical method to form a carbonate byproduct, and the rest oxygen is circularly supplied into a sealed chamber for use;
s3, distributing pipelines for supplying oxygen into the sealed chamber along pipelines for extracting carbon dioxide from the chamber, heating the oxygen by waste heat in the carbon dioxide, and then supplying the heated oxygen into the sealed chamber for use;
s4, separating copper sheets, silicon dioxide, carbon dioxide and water in the sealed chamber, and reducing heat and gas loss.
The invention has the technical effects and advantages that:
According to the invention, the composite sealing ring can be decomposed into the copper sheet with copper oxide on the surface, silicon dioxide, carbon dioxide and water at high temperature, so that the aim of harmless thermal decomposition treatment is fulfilled, and the decomposed copper sheet, carbon dioxide, silicon dioxide and other byproducts can be put into a second industry for use, and an industrial chain is realized;
The method for recycling the composite sealing ring realizes the separation of the copper sheet, the silicon dioxide, the carbon dioxide and the water, can fully utilize the residual oxygen and the residual heat in the gas to reduce the energy consumption of the whole device, and can form byproducts;
the whole recovery device is treated in a sealed space, so that heat and gas leakage are avoided, energy is saved, the environment is protected, the separation effect of copper sheets, silicon dioxide, carbon dioxide and water can be further improved by circulating gas supply, and the phenomenon that silicon dioxide impurities are mixed with the copper sheets is avoided.
Drawings
FIG. 1 is a schematic view of a composite seal ring according to the present invention.
Fig. 2 is a schematic view of a waste recycling device for composite seal ring according to the present invention.
Fig. 3 is a schematic view of another view angle structure of the waste recycling device for composite seal ring of the present invention.
Fig. 4 is a perspective structural sectional view of the composite seal ring waste recycling device of the present invention.
Fig. 5 is a plan view of a composite seal ring waste recycling device according to the present invention.
Fig. 6 is an enlarged schematic view of the structure a in fig. 4 according to the present invention.
Fig. 7 is an enlarged schematic view of the structure at B in fig. 5 according to the present invention.
In the figure, 100 parts of base material, 200 parts of heat conducting layer, 1 part of recovery treatment box, 2 parts of feeding pipeline, 3 parts of sealing cover, 4 parts of decompression mechanism, 5 parts of oxygen supply pipe, 6 parts of outer composite pipeline, 7 parts of oxygen supply pipe, 8 parts of discharge pipeline, 9 parts of air pump, 10 parts of absorption treatment box, 11 parts of supporting leg, 12 parts of recovery pipeline, 13 parts of separation recovery box, 14 parts of motor, 15 parts of electric heating plate, 16 parts of rotating cylinder, 17 parts of sieve, 18 parts of driving connecting shaft, 19 parts of stripper plate, 20 parts of filter box, 21 parts of filter screen, 22 parts of filter layer, 23 parts of feeding channel, 24 parts of outer interlayer channel, 25 parts of separating port, 26 parts of discharge port, 27 parts of groove, 28 parts of rubber pipe orifice, 29 parts of rotating rod.
Detailed Description
The invention provides a composite sealing ring waste recycling device and a recycling method as shown in figures 1-7.
The heat-conducting composite sealing ring in the prior art is generally composed of four major parts:
The first part is a heat conducting material, which is a core component of the heat conducting gasket, and common heat conducting materials are rubber, silicon rubber, silicone grease, silver paste and the like. These materials are effective in conducting heat, rapidly transferring heat from the electronic device to the heat sink, and thereby lowering the device temperature .
The second portion is a substrate . The substrate is typically a flexible material such as polytetrafluoroethylene, polyimide film, polyamide film, copper sheet, and the like. The function of the substrate is to provide support and protection for the thermally conductive material while having certain insulating properties .
Third part adhesive in order to bond the thermally conductive pad to the electronic device and heat sink, a certain amount of adhesive needs to be added. The adhesive is typically a high temperature glue that maintains stable adhesion at high temperatures.
And in the fourth part, other additives , according to specific use requirements, other components such as a filler, an antioxidant and the like can be added into the heat-conducting gasket to improve the performance and the service life of the heat-conducting gasket.
Referring to fig. 1, the present invention provides a composite seal ring, which is made of a base material 100 (copper sheet) and a heat conductive layer 200 (silicone rubber), wherein the copper sheet can maintain the basic hardness and shape of the composite seal ring, and can prevent the phenomenon of reduced sealability caused by excessive deformation when the composite seal ring is applied to a sealed object, the silicone rubber is coated on the periphery of the copper sheet, thus achieving the purpose of increasing the flexibility and buffering performance of the composite seal ring, and the composite seal ring can ensure good sealability because the silicone rubber can be deformed to a certain extent to adapt to the shape of a position to be sealed.
Among them, silicone rubber is an elastic material having excellent properties, and when it is subjected to high temperature (400 to 550 ℃) it undergoes thermal decomposition reaction and forms siloxane, silica and organic matter, and silicone is one of the main components of thermal decomposition of silicone rubber, it is composed of silicon atoms and oxygen atoms, and it has high stability and chemical inertness. The siloxane undergoes oxidation at high temperatures and is further decomposed into silica and gas.
The organic matters are mainly decomposed by the organic distribution of the silicone rubber and contain elements such as carbon, hydrogen, oxygen and the like, and the organic matters have certain volatility and combustibility, so that smoke and harmful gas are easy to generate at high temperature.
Finally, the thermal decomposition products of the silicone rubber mainly comprise silicon dioxide and organic matters, and elements such as carbon, hydrogen, oxygen and the like in the organic matters are combusted at high temperature to finally form carbon dioxide and water (possibly with a small amount of impurities such as ash generated when the carbon simple substance is impure), so that the final silicone rubber is thermally decomposed into the silicon dioxide, the carbon dioxide and the water (possibly containing a small amount of impurities).
Wherein, the copper sheet starts to oxidize to generate black copper oxide (CuO) at the high temperature of 400-550 ℃.
Thus, the final product of the composite seal ring after decomposition at high temperatures of 400 ℃ to 550 ℃ is copper flakes with copper oxide on the surface, silica, carbon dioxide and water (possibly containing small amounts of impurities).
Referring to fig. 4, there is provided a composite seal ring waste recycling apparatus including a recycling bin 1, a rotary drum 16 provided in the recycling bin 1, the rotary drum 16 being disposed obliquely, and a composite seal ring being located inside the rotary drum 16 and thermally decomposed inside the rotary drum 16.
The upper end of the rotating cylinder 16 is integrally provided with a feeding pipeline 2, the lower end of the rotating cylinder 16 is fixedly connected with a driving connecting shaft 18, the feeding pipeline 2 and the driving connecting shaft 18 are both rotationally connected to the recovery processing box 1, one end of the feeding pipeline 2, which is movably extended out of the recovery processing box 1, is provided with a sealing cover 3 in an opening-closing mode, one side of the bottom of the recovery processing box 1 is connected with a motor 14 through a bracket, a rotating shaft of the motor 14 is fixedly connected with the driving connecting shaft 18, and when the motor 14 is started, the rotating shaft drives the sieve holes 17, the electric heating plate 15 and the feeding pipeline 2 to rotate, so that a composite sealing ring in the rotating cylinder 16 is mixed.
An electric heating plate 15 is fixedly arranged on the inner wall of the recovery processing box 1, the electric heating plate 15 can heat the composite sealing ring inside the rotary cylinder 16, and the composite sealing ring is in mixed motion in the heating process, so that the composite sealing ring is uniformly heated, and when the heat of the composite sealing ring reaches 400-550 ℃, copper sheets, silicon dioxide, carbon dioxide and water which are decomposed to form copper oxide are decomposed.
Wherein, a plurality of sieve holes 17 are uniformly provided on the rotating cylinder 16, the sieve holes 17 are used for discharging silicon dioxide, carbon dioxide and water, referring to fig. 5 and 7, the bottom of the rotating cylinder 16 is provided with a separating opening 25, the diameter of the separating opening 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 finally fall through the separating opening 25 to be discharged.
The filter box 20 is arranged in the lower end of the recovery processing box 1, the filter screen 21 is arranged above the filter box 20, the silicon dioxide and water discharged from the sieve holes 17 can fall into the filter box 20 through the filter screen 21 to be collected, the filter layer 22 is arranged at the outlet of the filter box 20, and further discharge of impurity particles can be avoided. The water is a small amount of water, and is usually evaporated and discharged from the recovery processing tank 1, and the recovery processing tank 1 is provided with a pressure release mechanism 4 for controlling the internal pressure of the recovery processing tank 1, for example, a pressure release valve, which will not be described herein.
And a transfer chamber is formed between the other side of the filter box 20 and the inside of the recovery processing box 1, the transfer chamber is correspondingly arranged below the separation opening 25, a groove 27 is formed in the inner wall below the transfer chamber, a rubber pipe opening 28 is integrally formed in the bottom of the groove 27, the separation recovery box 13 is installed at the bottom of the recovery processing box 1, a discharge opening 26 above the separation recovery box 13 is in butt joint with the rubber pipe opening 28, a stripper plate 19 is rotatably connected in the groove 27 through a rotating rod 29, a torsion spring is arranged at the joint of the rotating rod 29 and the stripper plate 19, when a copper sheet falling from the separation opening 25 falls on the surface of the stripper plate 19, the stripper plate 19 is downwards opened due to the action of gravity pressing, the copper sheet enters the separation recovery box 13 for collection, and the stripper plate 19 is reset by the action of the torsion spring after the copper sheet enters the separation recovery box 13.
According to the invention, a sealed cavity can be formed between the separation recovery box 13 for collecting the copper sheets and the recovery processing box 1, so that the thermal decomposition efficiency of the composite sealing ring is ensured. When the copper sheets in the separation recovery box 13 are collected and then the empty separation recovery box 13 is replaced, the support legs 11 for supporting the recovery treatment box 1 are arranged at the bottom of the recovery treatment box 1, so that the butt joint separation recovery box 13 is convenient to install.
Referring to fig. 2 to 7, an air pump 9 is installed at the side of the recovery processing tank 1, an oxygen supply pipe 7, a recovery pipe 12 and a discharge pipe 8 are provided on the air pump 9, wherein the discharge pipe 8 is communicated with the inside of the filter box 20, when the air pump 9 is started, suction force is generated by the filter box 20, so that silicon dioxide, carbon dioxide and water in the recovery processing tank 1 are collected into the filter box 20, the recovery pipe 12 is communicated with the inside of the recovery processing tank 1, the communicating position faces the separating opening 25, an oxygen tank is further connected to the air pump 9, oxygen in the oxygen tank is pumped out by the air pump 9 to be supplied to the vicinity of the separating opening 25, so that oxygen just enters the inside of the feed pipe 2 through the separating opening 25, oxygen is supplied fully, the silicon rubber in the inside of the feed pipe 2 is finally decomposed into silicon dioxide, carbon dioxide and water, and because the oxygen enters from the separating opening 25, the phenomenon that the silicon dioxide, the carbon dioxide and the water drop into the separating tank 13 from the separating opening 25 is avoided, and only heavier copper sheet can enter the copper sheet separating tank 13 to separate the copper sheet and the silicon dioxide and the carbon dioxide and the water is recovered.
An absorption treatment box 10 is arranged at the joint of the discharge pipeline 8 and the air pump 9, sodium hydroxide or calcium hydroxide is placed in the absorption treatment box 10, carbon dioxide enters the absorption treatment box 10 to react with alkali to generate carbonate and oxygen does not react in the process of pumping out the gas in the recovery treatment box 1 by the air pump 9, so that oxygen is separated, and byproducts can be generated in the subsequent recovery treatment of the carbonate, so that only oxygen is left in the gas after passing through the absorption treatment box 10, and the gas is mixed with the oxygen in the oxygen tank and then supplied to the recovery treatment box 1.
According to the invention, the oxygen tank is actually connected to the oxygen supply pipe 5, the outer ring of the exhaust pipe 8 is sleeved with the outer composite pipe 6, an outer interlayer channel 24 is formed between the outer composite pipe 6 and the exhaust pipe 8, oxygen in the oxygen tank can pass through the outer interlayer channel 24 and is just heated by waste heat of gas in the exhaust pipe 8, so that oxygen supplied into the recovery treatment box 1 has certain heat, and an energy-saving effect is achieved, wherein the oxygen supply pipe 5 is arranged at one end of the outer composite pipe 6 close to the recovery treatment box 1, one end of the outer composite pipe 6 far away from the oxygen supply pipe 5 is communicated with the oxygen supply pipe 7, and the oxygen supply pipe 7 is connected with the air pump 9.
In the composite sealing ring waste recovery device, the separation of the copper sheet, the silicon dioxide, the carbon dioxide and the water is realized by the method for recovering the composite sealing ring, the residual oxygen and the residual heat in the gas can be fully utilized to reduce the energy consumption of the whole device, byproducts can be formed, the whole recovery device is treated in a sealed space, the heat and the gas leakage are avoided, the energy is saved, the environment is protected, the separation effect of the copper sheet, the silicon dioxide, the carbon dioxide and the water can be further increased by utilizing the circulation of the gas, and the phenomenon that the silicon dioxide impurities are mixed with the copper sheet is avoided.
Claims (10)
1. The waste recovery device for the composite sealing ring comprises a recovery processing box (1) and is characterized in that a rotating cylinder (16) is rotatably arranged in the recovery processing box (1), the rotating cylinder (16) is obliquely arranged, and 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 rotary cylinder (16) is provided with a feeding pipeline (2) communicated with the outside of the recovery processing box (1), the lower end of the rotary cylinder (16) is provided with a separating opening (25) for discharging copper sheets formed after the thermal decomposition of the composite sealing ring, the lower end of the recovery processing box (1) is internally provided with a switching cavity for falling copper sheets, and the lower end of the switching cavity is in butt joint with the separation recovery box (13);
the utility model discloses a filter cartridge, including filter cartridge (20), filter cartridge (20) upper end is provided with filter screen (21), and filter layer (22) are installed to one side that the switching cavity was kept away from to filter cartridge (20), and the outside of retrieving processing case (1) is provided with air pump (9), is provided with oxygen supply tube (7), exhaust pipe (8) and recovery pipeline (12) on air pump (9), the tip of recovery pipeline (12) is towards separating mouth (25), and the inside of exhaust pipe (8) intercommunication filter cartridge (20), and the outside of exhaust pipe (8) is provided with outer composite pipe (6), forms outer intermediate layer passageway (24) between outer composite pipe (6) and the exhaust pipe (8), the one end intercommunication of outer intermediate layer passageway (24) is provided with oxygen feed pipe (5), and oxygen feed pipe (5) are connected with outside oxygen gas pitcher, and the other end and the oxygen supply tube (7) of outer intermediate layer passageway (24) are linked together.
2. The composite seal ring waste recycling device according to claim 1, wherein a groove (27) is formed in the inner wall below the transfer cavity, a rubber pipe orifice (28) is integrally formed in the bottom of the groove (27), a discharge hole (26) above the separation recycling box (13) is in butt joint with the rubber pipe orifice (28), a discharge plate (19) is rotatably connected in the groove (27) through a rotating rod (29), and a torsion spring is arranged at the joint of the rotating rod (29) and the discharge plate (19).
3. The composite seal ring waste recycling device according to claim 1, wherein a plurality of sieve holes (17) are formed in the rotary cylinder (16), and the sieve holes (17) are communicated with the inside and the outside of the rotary cylinder (16) simultaneously.
4. The device for recycling waste materials of composite sealing rings according to claim 1, wherein a motor (14) for driving the rotary cylinder (16) to rotate is arranged at the lower end of the recycling bin (1).
5. The device for recycling waste materials of composite sealing rings according to claim 1, wherein an absorption treatment box (10) is arranged at the joint of the discharge pipeline (8) and the discharge pipeline (9).
6. The composite seal ring waste recycling device according to claim 1, wherein a seal cover (3) is arranged at the upper end of the feeding pipeline (2) in an open-close manner.
7. The composite seal ring waste recycling device according to claim 1, wherein the bottom of the recycling treatment box (1) is provided with supporting legs (11).
8. The waste recycling device for the composite sealing ring is characterized in that a pressure release mechanism (4) is arranged above the recycling treatment box (1).
9. The composite seal ring waste recycling device according to claim 1, wherein an electric heating plate (15) is arranged on the inner wall of the recycling treatment box (1).
10. The method for recycling the waste of the composite sealing ring is characterized by comprising the waste recycling device for the composite sealing ring according to any one of claims 1 to 9, and further comprising the following steps:
S1, thermal decomposition, namely sending the composite sealing ring into a sealed cavity for thermal decomposition, wherein the thermal decomposition temperature is 400-550 ℃, the composite sealing ring is enabled to do mixed motion in the cavity in the thermal decomposition process, oxygen is provided to the sealed cavity in the thermal decomposition process, and copper sheets, silicon dioxide, carbon dioxide and water are formed after thermal decomposition;
S2, separating copper sheets, silicon dioxide, carbon dioxide and water;
The copper sheet is large in volume, the copper sheet is screened downwards by utilizing gravity, silicon dioxide particles are small, a filter screen structure is arranged in the cavity for separation, water is evaporated, and carbon dioxide is extracted by utilizing a mechanism for providing oxygen to the cavity;
the extracted carbon dioxide contains a small amount of oxygen, the carbon dioxide is separated and absorbed by adopting a chemical method to form a carbonate byproduct, and the rest oxygen is circularly supplied into a sealed chamber for use;
s3, distributing pipelines for supplying oxygen into the sealed chamber along pipelines for extracting carbon dioxide from the chamber, heating the oxygen by waste heat in the carbon dioxide, and then supplying the heated oxygen into the sealed chamber for use;
s4, separating copper sheets, silicon dioxide, carbon dioxide and water in the sealed chamber, and reducing heat and gas loss.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202510362321.4A CN119972755B (en) | 2025-03-26 | 2025-03-26 | Composite sealing ring waste recycling device and recycling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202510362321.4A CN119972755B (en) | 2025-03-26 | 2025-03-26 | Composite sealing ring waste recycling device and recycling method |
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| CN119972755B CN119972755B (en) | 2026-01-27 |
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| CN1468288A (en) * | 2000-09-29 | 2004-01-14 | ����Ѭ | Apparatus and method for recovering marketable products from waste rubber |
| KR101531024B1 (en) * | 2014-09-16 | 2015-06-24 | 주식회사 에코엔 | Recycling equipment of waste electric wire and waste tire |
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| CN119972755B (en) | 2026-01-27 |
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