A carbon material product recycling system

Abstract

The present application relates to carbon material product technical field, specifically, a kind of carbon material product recycling system, comprising: reaction kettle, the reaction kettle is connected with first filter press by pipeline, and reaction kettle and first filter press constitute production graphene oxide system;The first reaction tank is connected with second filter press by pipeline, and first reaction tank and second filter press constitute production expandable graphite system;Second reaction tank, the second reaction tank is connected with third filter press by pipeline, and second reaction tank and third filter press constitute production nanotube purification system;The production graphene oxide system, production expandable graphite system and production nanotube purification system are connected with wastewater conditioning tank and reuse water pool by pipeline system.The overall structure of the equipment can not only greatly save water resources, but also resource can be recycled, i.e.circulating acid, reduce environmental pollution, save neutralization cost, and circulating water, reduce production cost.

Description

Technical Field

[0001] This invention relates to the field of carbon material products technology, and more specifically, to a carbon material product recycling system. Background Technology

[0002] Graphene oxide sheets are the product of chemical oxidation and exfoliation of graphite powder. Graphene oxide is a single atomic layer that can expand to tens of micrometers in lateral dimension at any time. Therefore, its structure spans the typical scales of general chemistry and materials science. Graphene oxide can be regarded as a non-traditional type of soft material, possessing the properties of polymers, colloids, films, and amphoteric molecules.

[0003] In the process of producing graphene oxide, the waste materials and waste liquid generated in the factory cannot be reused, and a large amount of water resources are wasted. Therefore, we propose a carbon material product recycling system. Summary of the Invention

[0004] This application provides a carbon material product recycling system to solve the problem that waste and waste liquid generated in factories cannot be reused and also waste a lot of water resources.

[0005] or,

[0006] To solve, or at least partially solve, the above-mentioned technical problems, this application provides a carbon material product recycling system, comprising:

[0007] A reaction vessel, which is connected to a first filter press via a pipeline, and the reaction vessel and the first filter press together form a system for producing graphene oxide;

[0008] The first reaction vessel is connected to the second filter press via a pipeline, and the first reaction vessel and the second filter press together form a system for producing expandable graphite.

[0009] The second reaction vessel is connected to the third filter press via a pipeline, and the second reaction vessel and the third filter press together form a nanotube purification system.

[0010] The graphene oxide production system, the expandable graphite production system, and the nanotube purification system are connected to the wastewater conditioning tank and the recycled water tank via a pipeline system.

[0011] Optionally, a neutralization tank, a sedimentation tank, a clarification tank, a variable porosity filter, an ultrafiltration device, a nanofiltration device, and a reverse osmosis device are arranged sequentially from left to right between the wastewater equalization tank and the reclaimed water tank.

[0012] Optionally, the wastewater equalization tank, neutralization tank, sedimentation tank, clarification tank, variable porosity filter, ultrafiltration device, nanofiltration device, reverse osmosis device, and reclaimed water tank are all connected sequentially by pipelines.

[0013] Optionally, the liquid filtered by the nanofiltration device is cooled and crystallized to form a byproduct salt.

[0014] Optionally, the water filtered by the nanofiltration device enters a recycled water tank through a pipeline.

[0015] Optionally, the graphene oxide production system includes the following process:

[0016] The set amount of sulfuric acid is introduced into the reactor, the refrigerator is turned on for circulating cooling, the temperature inside the reactor is maintained within the set range, the set amount of graphite powder is added, and the mixture is stirred for the set time.

[0017] Add the set amount of potassium permanganate, and continue stirring after the feeding is completed for the set time of low-temperature intercalation and exfoliation reaction.

[0018] Heat to the set temperature and continue the medium-temperature oxidation and stripping reaction for the set time;

[0019] Add a set amount of room temperature pure water and heat up at the same time. Control the reaction temperature within the set temperature range and monitor the temperature in real time. When the material temperature is lower than the set temperature, slowly add pure water at the set temperature to the set amount and control the material temperature at the set temperature for the set time of high-temperature oxidation stripping reaction.

[0020] After the high-temperature oxidation and exfoliation reaction, the material is fed into the first filter press for filtration. After filtration, acid 1 is collected and recovered. The precipitated material is washed with hydrochloric acid in a set ratio and then filtered again. This process is repeated three times. Then, the material is precipitated and dried to form graphene oxide.

[0021] Optionally, the second washing after the filter press is performed by washing with a fixed amount of pure water at a fixed temperature for a set time, and the third washing after the filter press is performed by washing with hydrochloric acid and deionized water.

[0022] Optionally, the expandable graphite production system includes the following process:

[0023] Adjust the sulfuric acid concentration of recovered acid 1 to the set concentration, cool it to below the set temperature, and then add the set amount of expandable graphite to the reaction vessel;

[0024] After stirring for a set time, add a set proportion of potassium permanganate, stir for a set time, and then carry out the intercalation reaction and oxidation reaction.

[0025] The reacted liquid enters the second filter press for filtration. The filtrate is recovered and called recovered acid 2. The recovered acid 2 is then distilled to obtain concentrated sulfuric acid of a certain concentration.

[0026] Furthermore, the precipitate filtered by the second filter press is treated with a set proportion of hydrogen peroxide and reacted for a set time to remove potassium permanganate. Finally, the precipitate is washed by filter press to obtain expandable graphite and waste acid liquid.

[0027] Optionally, the nanotube production and purification system includes the following process:

[0028] The set amount of nickel-based carbon nanotubes are dissolved in a solution of recycled acid 2, hydrochloric acid, and deionized water in a set ratio and reacted once in the second reaction tank. The solid-liquid ratio is set, the reaction temperature is set, and the reaction time is set. Then, the mixture is centrifuged and dried to form a precipitate and filter press waste acid. The filter press waste acid is then neutralized and discharged.

[0029] The precipitate is washed by pressure filtration to form recovered acid 3 and precipitate. The precipitate is washed three times to form high-purity carbon nanotubes, and the secondary reaction uses hydrochloric acid of a set concentration.

[0030] Optionally, the washing wastewater, waste acid, and filter press waste acid generated in the graphene oxide production system, expandable graphite production system, and nanotube purification system are all piped into a wastewater equalization tank. The recycled water tank supplies water through pipes to the filter press washing in the graphene oxide production system, the filter press washing in the expandable graphite production system, and the primary reaction, secondary reaction, primary washing, secondary washing, and tertiary washing in the nanotube purification system.

[0031] The beneficial effects of this invention are as follows:

[0032] The equipment's overall structure allows for the production of approximately 500 kg of expandable graphite. After a single pressure filtration, the remaining acid solution weighs approximately 1150 kg, with a concentration reduced to 72% ± 2%. Following an acid purification process, approximately 445 L of 95% concentrated sulfuric acid is produced, with an acid recovery rate of approximately 61%. Washing the produced 500 kg of expandable graphite requires 20 cubic meters of deionized water. Since the ratio of carbon nanotubes to water used for purification is approximately 1:200, each tank of carbon nanotubes needs to be purified to meet the required washing volume of expandable graphite. Furthermore, the washing wastewater undergoes water treatment for purification and reuse, significantly conserving water resources and enabling resource recycling—namely, recycling acid to reduce environmental pollution, saving neutralization costs, and recycling water to reduce production costs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is an overall structural diagram of an embodiment of the present invention.

[0035] Figure 2 This is an overall process diagram of an embodiment of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a rolled steel connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0040] In existing technologies, graphene oxide sheets are products of chemical oxidation and exfoliation of graphite powder. Graphene oxide is a single atomic layer that can expand to tens of micrometers in lateral dimensions at any time. Therefore, its structure transcends the typical scales of general chemistry and materials science. Graphene oxide can be regarded as a non-traditional type of soft material, possessing the properties of polymers, colloids, films, and amphoteric molecules. However, the production of graphene oxide is highly polluting and results in significant waste of water resources.

[0041] To address the aforementioned problems, this invention proposes a carbon material product recycling system to solve the issues in existing technologies where waste and wastewater generated in factories cannot be reused, and also waste a large amount of water resources.

[0042] like Figures 1 to 2 As shown, this embodiment provides a carbon material product recycling system, including:

[0043] A reaction vessel, which is connected to a first filter press via a pipeline, and the reaction vessel and the first filter press together form a system for producing graphene oxide;

[0044] The first reaction vessel is connected to the second filter press via a pipeline, and the first reaction vessel and the second filter press together form a system for producing expandable graphite.

[0045] A second reaction vessel is connected to a third filter press via pipeline, and the second reaction vessel and the third filter press together form a nanotube purification system.

[0046] The graphene oxide production system, the expandable graphite production system, and the nanotube purification system are connected to the wastewater conditioning tank and the recycled water tank via a pipeline system.

[0047] Specifically: the reaction vessel, the first reaction tank, the first filter press, the second reaction tank, the second filter press, and the third filter press all use equipment that is already available on the market.

[0048] In this embodiment, as Figure 1 and Figure 2 As shown: From left to right, the wastewater equalization tank and the recycled water tank are provided with a neutralization tank, a sedimentation tank, a clarification tank, a variable porosity filter, an ultrafiltration device, a nanofiltration device, and a reverse osmosis device.

[0049] Specifically: neutralization tanks, sedimentation tanks, clarification tanks, variable porosity filters, ultrafiltration devices, nanofiltration devices, and reverse osmosis devices are used to treat wastewater in wastewater equalization tanks.

[0050] In this embodiment, as Figure 1 and Figure 2As shown: the wastewater equalization tank, neutralization tank, sedimentation tank, clarification tank, variable porosity filter, ultrafiltration device, nanofiltration device, reverse osmosis device and reclaimed water tank are all connected in sequence by pipelines.

[0051] Specifically, the wastewater equalization tank, neutralization tank, sedimentation tank, clarification tank, variable porosity filter, ultrafiltration device, nanofiltration device, reverse osmosis device, and reclaimed water tank all use existing equipment on the market.

[0052] In this embodiment, as Figure 1 and Figure 2 As shown: the liquid filtered by the nanofiltration device is cooled and crystallized to form a by-product salt.

[0053] Specifically, it can purify and reuse filtered materials, thereby greatly saving resources.

[0054] In this embodiment, as Figure 1 and Figure 2 As shown: the water filtered by the nanofiltration device enters the recycled water tank through pipelines.

[0055] Specifically: the water reuse tank is used to store filtered, usable water.

[0056] In this embodiment, as Figure 1 and Figure 2 As shown: The graphene oxide production system includes the following processes:

[0057] 1. Pour the set amount of sulfuric acid into the reactor, turn on the refrigerator to circulate the cooling system, keep the temperature inside the reactor within the set range, add the set amount of graphite powder, and stir for the set time;

[0058] 2. Add the set amount of potassium permanganate, and continue stirring after the feeding is completed for the set time of low-temperature intercalation and exfoliation reaction;

[0059] 3. Increase the temperature to the set temperature and continue the medium-temperature oxidation and stripping reaction for the set time;

[0060] 4. Add the set amount of room temperature pure water and heat up at the same time. Control the reaction temperature within the set temperature range and monitor the temperature in real time. When the material temperature is lower than the set temperature, slowly add pure water at the set temperature to the set amount and control the material temperature at the set temperature for the set time of high-temperature oxidation stripping reaction.

[0061] 5. After the high-temperature oxidation and stripping reaction, the material is fed into the first filter press for filtration. After filtration, acid 1 is collected and recovered. The precipitated material is washed with hydrochloric acid in a set ratio and then filtered again. This process is repeated three times. Then, the material is precipitated and dried to form graphene oxide.

[0062] Specifically: 360L of sulfuric acid is introduced into the reactor, and the refrigeration unit is turned on to circulate and cool the reactor, maintaining the temperature inside the reactor at 0-4℃. 20kg of graphite powder is added and stirred for 30min. 60kg of potassium permanganate is added, and after the addition is completed, stirring is continued for a low-temperature intercalation and exfoliation reaction for 30min. The temperature is then raised to 36-37℃ and a medium-temperature oxidation and exfoliation reaction is continued for 2 hours. 360L of room temperature pure water is added, and the temperature is raised simultaneously, controlling the reaction temperature within the range of 65-70℃. The temperature is monitored in real time. When the material temperature is below 63℃, 360L of 70℃ pure water is slowly added, and the material temperature is controlled at 65-70℃ for a high-temperature oxidation and exfoliation reaction for 4 hours.

[0063] 5. After the high-temperature oxidation and exfoliation reaction, the material is fed into the first filter press for filtration. After filtration, acid 1 is collected and recovered. The precipitated material is washed with hydrochloric acid at a ratio of 1:40 and then filtered again. This process is repeated three times. Then, the material is precipitated and dried to form graphene oxide.

[0064] In this embodiment, as Figure 1 and Figure 2 As shown: the second washing after the initial washing and filtration is performed by washing with a fixed amount of pure water at a fixed temperature for a set time, and the third washing after the initial washing and filtration is performed by washing with hydrochloric acid and deionized water.

[0065] Specifically: Wash with 300L of 80℃ pure water for 2 hours, then perform a second pressure filtration.

[0066] In this embodiment, as Figure 1 and Figure 2 As shown: The expandable graphite production system includes the following processes:

[0067] 1. Adjust the sulfuric acid concentration of recovered acid 1 to the set concentration, cool it to below the set temperature, and then add the set amount of expandable graphite to the reaction vessel;

[0068] 2. After stirring for a set time, add the set proportion of potassium permanganate, stir for a set time, and carry out the intercalation reaction and oxidation reaction;

[0069] 3. The reacted liquid enters the second filter press for filtration. The filtrate is recovered and called recovered acid 2. The recovered acid 2 is then distilled to obtain concentrated sulfuric acid of a certain concentration.

[0070] 4. The precipitate filtered by the second filter press is treated with a set proportion of hydrogen peroxide and reacted for a set time to remove potassium permanganate. Finally, the precipitate is washed by filter press to obtain expandable graphite and waste acid liquid.

[0071] Specifically: the sulfuric acid concentration of recovered acid 1 is adjusted to about 75%, and the temperature is lowered to below 30 degrees Celsius. Then, a set amount of expandable graphite is added to the reaction vessel. After stirring for 30 minutes, potassium permanganate in a ratio of 0.08-0.1 is added, and the mixture is stirred for 40 minutes to carry out intercalation and oxidation reactions. The liquid after the reaction is filtered in a second filter press, and the filtrate is recovered as recovered acid 2. The recovered acid 2 is then distilled to obtain concentrated sulfuric acid of a certain concentration. The precipitate from the second filter press is treated with hydrogen peroxide in a ratio of 0.1 and reacted for 30 minutes to remove potassium permanganate. Finally, the precipitate is washed by filter press to obtain expandable graphite and waste acid liquid.

[0072] In this embodiment, as Figure 1 and Figure 2 As shown: The nanotube production and purification system includes the following processes:

[0073] 1. Dissolve the set amount of nickel-based carbon nanotubes in a solution of recovered acid 2, hydrochloric acid, and deionized water in a set ratio in the second reaction tank for a single reaction. The solid-liquid ratio is set, the reaction temperature is set, and the reaction time is set. Then, centrifuge and dry to form precipitate and filter waste acid. Neutralize the filter waste acid and discharge it.

[0074] 2. The precipitate is washed by pressure filtration to form recovered acid 3 and precipitate. The precipitate is washed three times to form high-purity carbon nanotubes. The secondary reaction uses hydrochloric acid of a set concentration.

[0075] Specifically: 10 kg of nickel-based carbon nanotubes are dissolved in a solution of recycled acid 2, hydrochloric acid, and deionized water in a set ratio and reacted once in a second reaction tank. The solid-liquid ratio is 1:1:3, the reaction temperature is 90℃, and the reaction time is 10 hours. Afterward, the mixture is centrifuged and dried to form a precipitate and filter press waste acid. The filter press waste acid is then neutralized and discharged.

[0076] The precipitate is washed by pressure filtration to form recovered acid 3 and precipitate. After three washings, the precipitate forms high-purity carbon nanotubes. The secondary reaction uses hydrochloric acid of a set concentration. The recovered acid from the pressure filtration is used for the initial washing of graphene oxide, and the washing water is used for the initial pressure filtration washing of graphene oxide and expandable graphite.

[0077] In this embodiment, as Figure 1 and Figure 2 As shown: The washing wastewater, waste acid, and filter press waste acid generated in the graphene oxide production system, expandable graphite production system, and nanotube purification system are all piped into the wastewater equalization tank. The recycled water tank supplies water through pipes to the filter press washing in the graphene oxide production system, the filter press washing in the expandable graphite production system, and the primary reaction, secondary reaction, primary washing, secondary washing, and tertiary washing in the nanotube purification system.

[0078] Specifically, the water in the recycled water tank is wastewater from the graphene oxide production system, the expandable graphite production system, and the nanotube purification system that has been treated and filtered for reuse, thus greatly saving water resources.

[0079] The overall process flow is as follows: 1. 360L of sulfuric acid is introduced into the reactor, the refrigerator is turned on for circulating cooling, the temperature inside the reactor is maintained at 0-4℃, 20kg of graphite powder is added, and the mixture is stirred for 30min.

[0080] 2. Add 60 kg of potassium permanganate, and continue stirring after the feeding is completed for 30 min to react the low-temperature intercalation and exfoliation reaction.

[0081] 3. Continue the medium-temperature oxidation and exfoliation reaction at 36-37℃ for 2 hours;

[0082] 4. Add 360L of room temperature pure water and simultaneously raise the temperature. Control the reaction temperature within the range of 65-70℃ and monitor the temperature in real time. When the material temperature is below 63℃, slowly add 360L of 70℃ pure water and control the material temperature at 65-70℃ to carry out the high-temperature oxidation and stripping reaction for 4 hours.

[0083] 5. After the high-temperature oxidation and stripping reaction, the material is fed into the first filter press for filter pressing. After filter pressing, acid 1 is collected and recovered. The precipitated material is washed with hydrochloric acid at a ratio of 1:40 and then filtered again. This process is repeated 3 times. Then, the material is precipitated and dried to form graphene oxide.

[0084] 6. Adjust the sulfuric acid concentration of recovered acid 1 to about 75%, cool it down to below 30 degrees Celsius, and then add the set amount of expandable graphite to the reaction vessel;

[0085] 7. After stirring for 30 minutes, add potassium permanganate at a ratio of 0.08-0.1 and stir for 40 minutes to carry out the intercalation reaction and oxidation reaction;

[0086] 8. The liquid after the reaction enters the second filter press for filtration. The filtrate is recovered and called recovered acid 2. The recovered acid 2 is then distilled to obtain concentrated sulfuric acid of a certain concentration.

[0087] 9. The precipitate filtered by the second filter press is treated with 0.1% hydrogen peroxide and reacted for 30 minutes to remove potassium permanganate. Finally, the precipitate is washed by filter press to obtain expandable graphite and waste acid solution.

[0088] 10. Dissolve 10 kg of nickel-based carbon nanotubes in a solution of recycled acid 2, hydrochloric acid, and deionized water in a predetermined ratio and carry out a reaction in the second reaction vessel. The solid-liquid ratio is 1:1:3, the reaction temperature is 90℃, and the reaction time is 10 hours. Then, centrifuge and dry to form precipitate and filter press waste acid. Neutralize the filter press waste acid and discharge it.

[0089] 11. The precipitate is washed by pressure filtration to form recovered acid 3 and precipitate. After three washings, the precipitate forms high-purity carbon nanotubes. The secondary reaction uses hydrochloric acid of a set concentration. The recovered pressure filtration acid is used for the initial washing of graphene oxide, and the washing water is used for the initial pressure filtration washing of graphene oxide and expandable graphite.

[0090] To produce 20 kg of graphene oxide, the following is required:

[0091] 360L concentrated sulfuric acid (specific gravity 1.84, total weight 662kg);

[0092] 720L of deionized water (total weight 720kg);

[0093] After pressure filtration, the remaining amount is approximately (specific gravity 1.58, 613L, 970kg, loss 30%).

[0094] To adjust 970 kg of 47% sulfuric acid to 75%, approximately 366 L of 98% concentrated sulfuric acid (total weight approximately 673 kg) needs to be added; at this point, the total weight of the 75% sulfuric acid solution is approximately 1643 kg.

[0095] The process of preparing expandable graphite yields approximately 500 kg of expandable graphite. After one pressure filtration, the remaining acid solution weighs approximately 1150 kg and its concentration is reduced to 72% ± 2%. After an acid purification process, approximately 445 L of 95% concentrated sulfuric acid can be produced, with an acid recovery rate of approximately 61%.

[0096] Washing 500 kg of expandable graphite requires 20 cubic meters of deionized water. The ratio of carbon nanotubes to water used for purification is approximately 1:200. Therefore, 100 kg of carbon nanotubes need to be purified per tank to meet the cleaning capacity of the expandable graphite. In addition, the washing wastewater will be treated and purified for reuse.

[0097] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A carbon material product recycling system, characterized in that, include: A reaction vessel, which is connected to a first filter press via a pipeline, and the reaction vessel and the first filter press together form a system for producing graphene oxide; The first reaction vessel is connected to the second filter press via a pipeline, and the first reaction vessel and the second filter press together form a system for producing expandable graphite. The second reaction vessel is connected to the third filter press via a pipeline, and the second reaction vessel and the third filter press together form a nanotube purification system. The graphene oxide production system, the expandable graphite production system, and the nanotube purification system are connected to the wastewater conditioning tank and the recycled water tank via a pipeline system. The wastewater equalization tank and the recycled water tank are arranged from left to right as follows: neutralization tank, sedimentation tank, clarification tank, variable porosity filter, ultrafiltration device, nanofiltration device and reverse osmosis device; The washing wastewater, waste acid, and filter press waste acid generated in the graphene oxide production system, expandable graphite production system, and nanotube purification system are all piped into the wastewater equalization tank. The recycled water tank supplies water through pipes to the filter press washing in the graphene oxide production system, the filter press washing in the expandable graphite production system, and the primary reaction, secondary reaction, primary washing, secondary washing, and tertiary washing in the nanotube purification system. The graphene oxide production system collects and recovers acid 1 after filtration by the first filter press. The recovered acid 1 is then used as a reaction acid in the reaction tank of the expandable graphite production system after adjusting the sulfuric acid concentration and cooling. The expandable graphite production system recovers the filtrate as recovered acid 2 after filtration by the second filter press. The recovered acid 2 is used as a reaction acid in the reaction tank of the nanotube purification system.

2. The carbon material product recycling system according to claim 1, characterized in that: The wastewater equalization tank, neutralization tank, sedimentation tank, clarification tank, variable porosity filter, ultrafiltration device, nanofiltration device, reverse osmosis device, and reclaimed water tank are all connected sequentially by pipelines.

3. A carbon material product recycling system according to claim 2, characterized in that: The liquid filtered by the nanofiltration device is cooled and crystallized to form a byproduct salt.

4. A carbon material product recycling system according to claim 3, characterized in that: The water filtered by the nanofiltration device enters the recycled water tank through pipelines.

5. A carbon material product recycling system according to claim 1, characterized in that: The graphene oxide production system includes the following processes: The set amount of sulfuric acid is introduced into the reactor, the refrigerator is turned on for circulating cooling, the temperature inside the reactor is maintained within the set range, the set amount of graphite powder is added, and the mixture is stirred for the set time. Add the set amount of potassium permanganate, and continue stirring after the feeding is completed for the set time of low-temperature intercalation and exfoliation reaction. Heat to the set temperature and continue the medium-temperature oxidation and stripping reaction for the set time; Add a set amount of room temperature pure water and heat up simultaneously. Control the reaction temperature within the set temperature range and monitor the temperature in real time. When the material temperature is lower than the set temperature, slowly add pure water at the set temperature to the set amount and control the material temperature at the set temperature for the set time of high-temperature oxidation stripping reaction. After the high-temperature oxidation and exfoliation reaction, the material is fed into the first filter press for filtration. After filtration, acid 1 is collected and recovered. The precipitated material is washed with hydrochloric acid in a set ratio and then filtered again. This process is repeated three times. Then, the material is precipitated and dried to form graphene oxide.

6. A carbon material product recycling system according to claim 5, characterized in that: The second washing after the initial washing and filtration is performed by washing with a fixed amount of pure water at a fixed temperature for a set time, followed by a second filtration. The third washing after the initial washing and filtration is performed by washing with hydrochloric acid and deionized water.

7. A carbon material product recycling system according to claim 1, characterized in that: The expandable graphite production system includes the following processes: Adjust the sulfuric acid concentration of recovered acid 1 to the set concentration, cool it to below the set temperature, and then add the set amount of expandable graphite to the reaction vessel; After stirring for a set time, add a set proportion of potassium permanganate, stir for a set time, and then carry out the intercalation reaction and oxidation reaction. The reacted liquid enters the second filter press for filtration. The filtrate is recovered and called recovered acid 2. The recovered acid 2 is then distilled to obtain concentrated sulfuric acid of a certain concentration. Furthermore, the precipitate filtered by the second filter press is treated with a set proportion of hydrogen peroxide and reacted for a set time to remove potassium permanganate. Finally, after filter pressing and washing, expandable graphite and waste acid are obtained.

8. A carbon material product recycling system according to claim 1, characterized in that: The nanotube production and purification system includes the following processes: The set amount of nickel-based carbon nanotubes are dissolved in a solution of recycled acid 2, hydrochloric acid, and deionized water in a set ratio and reacted once in the second reaction tank. The solid-liquid ratio is set, the reaction temperature is set, and the reaction time is set. Then, the mixture is centrifuged and dried to form a precipitate and filter press waste acid. The filter press waste acid is then neutralized and discharged. The precipitate is washed by pressure filtration to form recovered acid 3 and precipitate. The precipitate is washed three times to form high-purity carbon nanotubes, and the secondary reaction uses hydrochloric acid of a set concentration.

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