A device for co-producing hydrocarbons from waste plastics and biomass pyrolysis and for hydrogen absorption and storage.

Abstract

This application relates to the field of pyrolysis technology, specifically disclosing a device for the co-production of hydrocarbons and hydrogen from the pyrolysis of waste plastics and biomass, as well as a hydrogen absorption and storage device. The device includes a crushing unit, an organic hydrogen storage liquid synthesis unit, a melt pyrolysis unit, a vapor deposition reaction unit, a hydrogen absorption unit, a fuel gas and working fluid circulation unit, and a product separation and catalyst regeneration unit. This application enables the continuous preparation, stripping, and collection of carbon nanotubes, as well as the ultrasonic cleaning, drying, regeneration, and recycling of the catalyst. Simultaneously, unsaturated aromatics obtained from biomass pyrolysis are used as an organic hydrogen storage liquid. After being introduced into the hydrogenation reaction chamber of the organic hydrogen storage liquid, it undergoes a catalytic hydrogenation reaction with the residual gas in the vapor deposition reaction chamber, thereby achieving in-situ absorption and storage of the hydrogen co-produced in the vapor deposition reaction chamber. This allows for the simultaneous negative carbon treatment of carbon-containing natural and artificial organic polymer solid waste, and the resource utilization of C, H, and O elements in the solid waste.

Description

Technical Field

[0001] This application relates to the field of pyrolysis technology, and in particular to a device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass, and for the absorption and storage of hydrogen. Background Technology

[0002] Traditional methods of treating carbon-containing organic polymer waste (such as incineration and landfill) generate substantial carbon emissions and pollute the environment. Synthetic plastic waste, in particular, faces severe management challenges due to its large volume, high inventory, and low recycling rate. Therefore, achieving clean recycling and high-value utilization of waste plastics and biomass has become crucial. Transforming them into high-value-added products such as carbon nanotubes and organic hydrogen storage liquids represents a highly promising approach to carbon-negative disposal, enabling the resource utilization of C, H, and O elements in solid waste.

[0003] Carbon nanotubes have broad application prospects, but traditional synthesis methods are costly, require stringent conditions, and generate significant carbon emissions. Utilizing the high hydrocarbon content of plastic products, high-purity carbon nanotubes and hydrogen can be co-produced through high-temperature pyrolysis and catalytic vapor deposition. However, the hydrogen produced by vapor deposition is difficult to store and transport, affecting the safety of the process. Utility Model Content

[0004] To address the problem of inconvenient storage and transportation of hydrogen generated during the vapor deposition process for preparing carbon nanotubes, this application provides a device for co-producing hydrocarbons from waste plastics and biomass through pyrolysis, as well as a hydrogen absorption and storage device.

[0005] The technical solution of the waste plastic and biomass pyrolysis hydrocarbon co-production and hydrogen absorption and storage device provided in this application is as follows:

[0006] A device for co-producing hydrocarbons from waste plastics and biomass through pyrolysis and for hydrogen absorption and storage includes:

[0007] The crushing device includes two crushing chambers, one of which is used to crush waste plastics and biomass raw materials, and the other crushing chamber is used to crush waste plastics.

[0008] An organic hydrogen storage liquid synthesis device is used to synthesize organic hydrogen storage liquid by pyrolysis of crushed waste plastics and biomass raw materials.

[0009] A pyrolysis melting device is used to melt and pyrolyze pulverized waste plastics to generate pyrolysis gas.

[0010] A vapor phase deposition reactor is used to prepare carbon nanotubes by vapor phase deposition of the gaseous products of the organic hydrogen storage liquid synthesis device and the pyrolysis gas generated by the molten pyrolysis device.

[0011] A hydrogen absorption device is used to absorb hydrogen in the tail gas generated by the gas phase deposition reactor, and the medium for absorbing hydrogen is the organic hydrogen storage liquid synthesized by the organic hydrogen storage liquid synthesis device.

[0012] A gas and working fluid circulation device is used to supply heat to the organic hydrogen storage liquid synthesis device, the molten pyrolysis device, the vapor phase deposition reaction device and the hydrogen absorption device.

[0013] The product separation and catalyst regeneration device is used to separate the product from the catalyst in the vapor deposition reaction chamber and to regenerate the catalyst.

[0014] The organic hydrogen storage liquid synthesis device synthesizes organic hydrogen storage liquid by pyrolyzing pulverized waste plastics and biomass raw materials. The melt pyrolysis device melts the pulverized waste plastics and then pyrolyzes them to generate pyrolysis gas. The gas phase deposition reaction device uses the gaseous products from the organic hydrogen storage liquid synthesis device and the pyrolysis gas generated by the melt pyrolysis device to perform gas phase deposition to prepare carbon nanotubes.

[0015] The tail gas generated by the vapor deposition reactor and the organic hydrogen storage liquid prepared by the organic hydrogen storage liquid synthesis device are simultaneously fed into the hydrogen absorption device. The hydrogen in the tail gas undergoes a catalytic hydrogenation reaction with the organic hydrogen storage liquid, thereby absorbing and storing the hydrogen in the tail gas. This ensures the safety of the vapor deposition reaction and improves the problem of inconvenient storage and transportation of hydrogen in the existing technology.

[0016] Furthermore, the organic hydrogen storage liquid synthesis device includes an organic hydrogen storage liquid synthesis chamber and an organic hydrogen storage liquid temporary storage chamber. The feed end of the organic hydrogen storage liquid synthesis chamber is connected to the pulverizing chamber, the gas outlet end of the organic hydrogen storage liquid synthesis chamber is connected to the vapor deposition reaction device, the liquid outlet end of the organic hydrogen storage liquid synthesis chamber is connected to the organic hydrogen storage liquid temporary storage chamber, and the liquid outlet end of the organic hydrogen storage liquid temporary storage chamber is connected to the hydrogen absorption device.

[0017] Crushed waste plastics and biomass raw materials react in an organic hydrogen storage liquid synthesis chamber to generate liquid and gaseous products. The liquid products are unsaturated aromatic compounds, which can be used as organic hydrogen storage liquids; the gaseous products are small molecule hydrocarbons, which can be used as liquefied petroleum gas or as raw materials for carbon nanotube deposition.

[0018] Furthermore, the molten pyrolysis apparatus includes a melting chamber and a pyrolysis gasification chamber, the feed end of the melting chamber is connected to the pulverizing chamber, and the gas outlet end of the pyrolysis gasification chamber is connected to the vapor deposition reactor.

[0019] After being melted in the melting chamber, the crushed waste plastic enters the pyrolysis gasification chamber for pyrolysis gasification reaction. The resulting pyrolysis gas can be used as a raw material for carbon nanotube deposition.

[0020] Furthermore, the vapor deposition reaction apparatus includes a vapor deposition reaction chamber, a cooling chamber, and a deposition tail gas storage chamber. A conveyor belt is provided in the vapor deposition reaction chamber, and a catalyst is loaded on the conveyor belt.

[0021] The conveyor belt-based catalyst moves in the vapor deposition reaction chamber, where pyrolysis gas deposits carbon nanotubes on the catalyst surface. After being cooled in a cooling chamber, the conveyor belt-based catalyst and carbon nanotubes enter a product separation and catalyst regeneration device to separate the product from the catalyst and regenerate the catalyst. The regenerated catalyst then enters the vapor deposition reaction chamber with the conveyor belt to continue participating in the reaction, thereby achieving continuous production of carbon nanotubes and improving production efficiency.

[0022] Furthermore, the hydrogen absorption device includes an organic hydrogen storage liquid hydrogenation reaction chamber, in which a deposition tail gas nozzle and an organic hydrogen storage liquid spraying device are provided. The deposition tail gas nozzle is connected to the deposition tail gas temporary storage chamber, and the organic hydrogen storage liquid spraying device is connected to the organic hydrogen storage liquid temporary storage chamber.

[0023] Furthermore, a hydrogenation reaction catalyst is fixedly installed in the hydrogenation reaction chamber of the organic hydrogen storage liquid, the organic hydrogen storage liquid spraying device is located above the hydrogenation reaction catalyst, and the deposition tail gas nozzle is located below the hydrogenation reaction catalyst.

[0024] The organic hydrogen storage liquid spraying device sprays the organic hydrogen storage liquid stored in the organic hydrogen storage liquid temporary storage chamber onto the hydrogenation reaction catalyst from top to bottom. The deposition tail gas nozzle sprays the tail gas stored in the deposition tail gas temporary storage chamber onto the hydrogenation reaction catalyst from bottom to top. The organic hydrogen storage liquid and the hydrogen in the tail gas undergo a hydrogenation reaction under the catalysis of the hydrogenation reaction catalyst, thereby absorbing and storing the hydrogen in the tail gas, ensuring the safety of the gas phase deposition reaction, and improving the problem of inconvenient storage and transportation of hydrogen in the existing technology.

[0025] Furthermore, the deposition exhaust gas nozzle is connected to the deposition exhaust gas storage chamber via a gas delivery pipeline, which is equipped with a gas valve and a flow meter.

[0026] The tail gas in the deposition tail gas storage chamber is ejected into the organic hydrogen storage liquid hydrogenation reaction chamber through the deposition tail gas nozzle. The gas valve can regulate the flow rate and volume of the tail gas.

[0027] Furthermore, the organic hydrogen storage liquid spraying device is connected to the organic hydrogen storage liquid temporary storage chamber via a liquid delivery pipeline, which is equipped with a mechanical pump and an organic hydrogen storage liquid valve.

[0028] Driven by a mechanical pump, the organic hydrogen storage liquid in the organic hydrogen storage liquid temporary storage chamber is sprayed into the organic hydrogen storage liquid hydrogenation reaction chamber through an organic hydrogen storage liquid spraying device; the organic hydrogen storage liquid valve can regulate the flow rate and volume of the organic hydrogen storage liquid.

[0029] Furthermore, the gas and working fluid circulation device includes a residual hydrocarbon gas storage chamber, a burner, an insulated working fluid circulation pipeline, and an insulated working fluid circulation pump. The residual hydrocarbon gas storage chamber is connected to the upper part of the organic hydrogen storage liquid hydrogenation reaction chamber. The burner is used to burn the residual hydrocarbon gas and heat the insulated working fluid. The insulated working fluid circulates and supplies heat between the organic hydrogen storage liquid synthesis chamber, the melting chamber, the pyrolysis gasification chamber, the vapor deposition reaction chamber, and the organic hydrogen storage liquid hydrogenation reaction chamber through the insulated working fluid circulation pipeline.

[0030] After the organic hydrogen storage liquid and the hydrogen in the tail gas undergo a catalytic hydrogenation reaction, the residual hydrocarbon gas in the tail gas enters the residual hydrocarbon gas storage chamber from the top of the organic hydrogen storage liquid hydrogenation reaction chamber and is collected. The residual hydrocarbon gas enters the burner for combustion, and the high-temperature flue gas produced exchanges heat with the insulating working medium. After absorbing heat, the insulating working medium is transported through the insulating working medium circulation pipeline to circulate and provide heat between the organic hydrogen storage liquid synthesis chamber, melting chamber, pyrolysis gasification chamber, vapor phase deposition reaction chamber, and organic hydrogen storage liquid hydrogenation reaction chamber, which helps to reduce energy consumption.

[0031] Furthermore, the product separation catalyst regeneration device includes a mechanical stripping chamber, an ultrasonic water washing chamber, and a catalyst drying and regeneration chamber arranged sequentially along the conveyor belt conveying direction.

[0032] After being cooled in the cooling chamber, the carbon nanotubes are conveyed to the mechanical stripping chamber by a conveyor belt. The mechanical stripping device scrapes off the carbon nanotubes from the surface of the catalyst substrate on the conveyor belt with a scraper. The catalyst then enters the ultrasonic water washing chamber, where it is ultrasonically cleaned with water as the medium to remove any remaining carbon nanotubes from the catalyst substrate. The remaining carbon nanotubes are then separated and collected by filtration. After passing through the ultrasonic water washing chamber, the catalyst substrate enters the catalyst drying and regeneration chamber for drying and regeneration. The regenerated catalyst is then conveyed to the vapor deposition reaction chamber to continue participating in the reaction.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The organic hydrogen storage liquid prepared in this application can not only serve as a high-value product, but also absorb the hydrogen produced in the device, ensuring the safety of the gas phase deposition reaction and helping to solve the problem of storing and transporting the product hydrogen; at the same time, it fixes the oxygen element in biomass into the liquid, reducing the amount of carbon dioxide, carbon monoxide and other gases generated in the traditional biomass pyrolysis reaction.

[0035] 2. By adopting a conveyor belt-based catalyst and a product separation catalyst regeneration device, continuous production of carbon nanotubes and catalyst recycling are achieved, thereby improving production efficiency;

[0036] 3. By employing multiple temporary storage chambers, such as an organic hydrogen storage liquid temporary storage chamber and a deposition tail gas temporary storage chamber, and by using multiple valves to control the flow rate and velocity of liquid and gas, the reaction process can be effectively controlled, ensuring the safety of the equipment.

[0037] 4. Utilizing the heat generated from the combustion of residual exhaust gas to keep multiple devices warm helps reduce energy consumption and ensures that there are no dangerous combustible gases in the exhaust gas. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0039] Reference numerals: 1. Crushing chamber; 2. Organic hydrogen storage liquid synthesis chamber; 3. Reaction catalyst; 4. Organic hydrogen storage liquid temporary storage chamber; 5. Vacuum pump; 6. Transmission device; 7. Catalyst drying and regeneration chamber; 8. Ultrasonic water washing chamber; 9. Mechanical stripping chamber; 10. Negative pressure fan; 11. Conveyor belt; 12. Cooling medium circulation device; 13. Cooling chamber; 14. Deposition tail gas temporary storage chamber; 15. Liquid outlet; 16. Gas valve and flow meter; 17. 18. Deposition tail gas nozzle; 19. Mechanical pump; 20. Hydrogenation reaction catalyst; 21. Organic hydrogen storage liquid valve; 22. Organic hydrogen storage liquid spray device; 23. First gas valve; 24. Residual hydrocarbon gas temporary storage chamber; 25. Insulated working fluid circulation pump; 26. Tail gas exhaust port; 27. Melting chamber; 28. Pyrolysis gasification chamber; 29. ​​Burner; 30. Second gas valve; 31. Organic hydrogen storage liquid hydrogenation reaction chamber; 32. Vapor phase deposition reaction chamber. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0041] This application discloses a device for co-producing hydrocarbons from waste plastics and biomass pyrolysis, and for hydrogen absorption and storage. (Refer to...) Figure 1 The waste plastic and biomass pyrolysis hydrocarbon co-production and hydrogen absorption and storage device includes a crushing device, an organic hydrogen storage liquid synthesis device, a melt pyrolysis device, a vapor phase deposition reaction device, a hydrogen absorption device, a fuel gas and working fluid circulation device, and a product separation catalyst regeneration device.

[0042] Reference Figure 1The crushing device includes two coaxially arranged crushing chambers 1, separated by a partition. One crushing chamber 1 is used to crush waste plastics and biomass raw materials, while the other crushing chamber 1 is used to crush waste plastics. Waste plastics can be polyethylene, polypropylene, polystyrene, polyvinyl chloride, etc., and biomass raw materials can be cellulose, hemicellulose, lignin, etc.

[0043] The organic hydrogen storage liquid synthesis device is used to synthesize organic hydrogen storage liquids from pulverized waste plastics and biomass raw materials through pyrolysis. (Refer to...) Figure 1 The organic hydrogen storage liquid synthesis device includes an organic hydrogen storage liquid synthesis chamber 2 and an organic hydrogen storage liquid temporary storage chamber 4. The organic hydrogen storage liquid synthesis chamber 2 is filled with a reaction catalyst 3. The organic hydrogen storage liquid synthesis chamber 2 is provided with a feed end, a liquid outlet end and a gas outlet end. Its feed end is connected to a crushing chamber 1 used for crushing waste plastics and biomass raw materials. The liquid outlet end of the organic hydrogen storage liquid synthesis chamber 2 is connected to the organic hydrogen storage liquid temporary storage chamber 4, and the gas outlet end of the organic hydrogen storage liquid synthesis chamber 2 is connected to a vapor phase deposition reactor.

[0044] Crushed waste plastics and biomass raw materials react in organic hydrogen storage liquid synthesis chamber 2 to generate liquid and gaseous products. The liquid products are unsaturated aromatic compounds, which can be used as organic hydrogen storage liquids. The gaseous products are small molecule hydrocarbons (methane, ethane, etc.), which can be used as liquefied petroleum gas or as raw materials for carbon nanotube deposition.

[0045] The pyrolysis unit is used to melt and pyrolyze pulverized waste plastics to generate pyrolysis gas, as described above. Figure 1 The pyrolysis apparatus includes a melting chamber 26 and a pyrolysis gasification chamber 27. The feed end of the melting chamber 26 is connected to the crushing chamber 1 for crushing waste plastics, and the discharge end of the melting chamber 26 is connected to the feed end of the pyrolysis gasification chamber 27. The pyrolysis gasification chamber 27 is provided with a gas outlet, which is connected to the vapor deposition reactor.

[0046] After being melted in the melting chamber 26, the pulverized waste plastic enters the pyrolysis gasification chamber 27 for pyrolysis gasification reaction. The resulting pyrolysis gas can be used as a raw material for carbon nanotube deposition.

[0047] The vapor phase deposition reactor is used to prepare carbon nanotubes by vapor phase deposition of gaseous products from an organic hydrogen storage liquid synthesis unit and pyrolysis gas generated from a melt pyrolysis unit, as described above. Figure 1 The vapor deposition reactor includes a vapor deposition reaction chamber 31, a cooling chamber 13, and a deposition tail gas storage chamber 14. The outlets of the organic hydrogen storage liquid synthesis chamber 2 and the pyrolysis gasification chamber 27 are both connected to the vapor deposition reaction chamber 31 via a vacuum pump 5. This allows the small-molecule hydrocarbon gaseous products generated in the organic hydrogen storage liquid synthesis chamber 2 and the pyrolysis gas generated in the pyrolysis gasification chamber 27 to be fed into the vapor deposition reaction chamber 31 for the preparation of carbon nanotubes.

[0048] Furthermore, refer to Figure 1 A conveyor belt 11, which is a stainless steel mesh belt, is installed in the vapor deposition reaction chamber 31 and is driven by a transmission device 6. The catalyst is loaded on the conveyor belt 11. The catalyst on the conveyor belt moves in the vapor deposition reaction chamber 31, and the pyrolysis gas in the vapor deposition reaction chamber 31 deposits carbon nanotubes on the surface of the catalyst, thereby realizing the continuous production of carbon nanotubes.

[0049] Reference Figure 1 The cooling chamber 13 is located outside the vapor deposition reaction chamber 31 and on the conveying path of the conveyor belt 11. The cooling chamber 13 is connected to a cooling working medium circulation device 12, which is used to drive the cooling working medium circulation so that the cooling chamber 13 maintains a low temperature. The conveyor belt substrate catalyst and product output from the vapor deposition reaction chamber 31 can be cooled in the cooling chamber 13.

[0050] The product separation and catalyst regeneration unit is used to separate the product from the catalyst in the vapor deposition reaction chamber 31 and to regenerate the catalyst, as described above. Figure 1 The product separation catalyst regeneration device includes a mechanical stripping chamber 9, an ultrasonic water washing chamber 8, and a catalyst drying and regeneration chamber 7 arranged sequentially along the conveyor belt 11.

[0051] After the product carried by the conveyor belt substrate catalyst is cooled in the cooling chamber 13, it is transported by the conveyor belt 11 to the mechanical stripping chamber 9. The mechanical stripping device scrapes off the carbon nanotubes on the surface of the conveyor belt substrate catalyst with a scraper. Then it enters the ultrasonic water washing chamber 8, where water is used as the medium for ultrasonic cleaning to remove the remaining carbon nanotubes from the conveyor belt substrate catalyst into the medium. The catalyst is then separated and collected by filtration. After passing through the ultrasonic water washing chamber 8, the conveyor belt substrate catalyst enters the catalyst drying and regeneration chamber 7 for drying and regeneration. The regenerated catalyst enters the vapor deposition reaction chamber 31 with the conveyor belt 11 to continue participating in the reaction.

[0052] Reference Figure 1 The deposition tail gas storage chamber 14 is located at the end of the phase deposition reaction chamber. A negative pressure fan 10 is installed on the gas phase deposition reaction chamber 31 to extract the tail gas in the gas phase deposition reaction chamber 31 to the deposition tail gas storage chamber 14 for storage.

[0053] The hydrogen absorption device is used to absorb hydrogen from the tail gas generated by the vapor deposition reactor. The medium used for hydrogen absorption is an organic hydrogen storage liquid synthesized by an organic hydrogen storage liquid synthesis unit. For details, please refer to... Figure 1The hydrogen absorption device includes an organic hydrogen storage liquid hydrogenation reaction chamber 30, a hydrogenation reaction catalyst 19 is fixedly installed in the organic hydrogen storage liquid hydrogenation reaction chamber 30, a deposition tail gas nozzle 17 is installed below the hydrogenation reaction catalyst 19 in the organic hydrogen storage liquid hydrogenation reaction chamber 30, and an organic hydrogen storage liquid spraying device 21 is installed above the hydrogenation reaction catalyst 19 in the organic hydrogen storage liquid hydrogenation reaction chamber 30.

[0054] Reference Figure 1 The deposition tail gas nozzle 17 is connected to the deposition tail gas storage chamber 14 via a gas delivery pipeline, which is equipped with a gas valve and a flow meter 16. Furthermore, the organic hydrogen storage liquid spraying device 21 is connected to the organic hydrogen storage liquid storage chamber 4 via a liquid delivery pipeline, which is equipped with a mechanical pump 18 and an organic hydrogen storage liquid valve 20.

[0055] Driven by the mechanical pump 18, the organic hydrogen storage liquid in the organic hydrogen storage liquid temporary storage chamber 4 is sprayed onto the hydrogenation reaction catalyst 19 through the organic hydrogen storage liquid spraying device 21. The organic hydrogen storage liquid valve 20 can regulate the flow rate and volume of the organic hydrogen storage liquid. The deposition tail gas nozzle 17 sprays the tail gas stored in the deposition tail gas temporary storage chamber 14 onto the hydrogenation reaction catalyst 19. The gas valve can regulate the flow rate and volume of the tail gas. The organic hydrogen storage liquid and the hydrogen in the tail gas undergo a hydrogenation reaction under the catalysis of the hydrogenation reaction catalyst 19, thereby absorbing and storing the hydrogen in the tail gas, ensuring the safety of the gas phase deposition reaction, and improving the problem of inconvenient storage and transportation of hydrogen in the prior art.

[0056] Reference Figure 1 The bottom of the organic hydrogen storage liquid hydrogenation reaction chamber 30 is provided with a liquid outlet 15 for discharging the hydrogenated organic hydrogen storage liquid; the top of the organic hydrogen storage liquid hydrogenation reaction chamber 30 is provided with a gas outlet for discharging residual hydrocarbon gases.

[0057] The gas and working fluid circulation unit is used to supply heat to the organic hydrogen storage liquid synthesis unit, the molten pyrolysis unit, the vapor deposition reactor, and the hydrogen absorption unit. For details, please refer to... Figure 1 The gas and working fluid circulation device includes a residual hydrocarbon gas storage chamber 23, a burner 28, an insulated working fluid circulation pipeline, and an insulated working fluid circulation pump 24. The residual hydrocarbon gas storage chamber 23 is connected to the gas outlet at the top of the organic hydrogen storage liquid hydrogenation reaction chamber 30, and is used to enrich the residual hydrocarbon gas. The residual hydrocarbon gas enters the burner 28 for combustion, and the resulting high-temperature flue gas (mainly water and carbon dioxide) exchanges heat with the insulated working fluid, heating the working fluid. The flue gas after combustion is discharged through the exhaust port 25.

[0058] Furthermore, the organic hydrogen storage liquid synthesis chamber 2, melting chamber 26, pyrolysis gasification chamber 27, vapor phase deposition reaction chamber 31, and organic hydrogen storage liquid hydrogenation reaction chamber 30 are each equipped with a heat-insulating jacket. Driven by the heat-insulating working fluid circulation pump 24, the heat-insulating working fluid, heated by the burner 28, circulates through the heat-insulating working fluid circulation pipeline between the heat-insulating jackets of the organic hydrogen storage liquid synthesis chamber 2, melting chamber 26, pyrolysis gasification chamber 27, vapor phase deposition reaction chamber 31, and organic hydrogen storage liquid hydrogenation reaction chamber 30, which helps to reduce energy consumption.

[0059] A first gas valve 22 is provided between the organic hydrogen storage liquid hydrogenation reaction chamber 30 and the residual hydrocarbon gas temporary storage chamber 23, and a second gas valve 29 is provided between the residual hydrocarbon gas temporary storage chamber 23 and the burner 28. The first gas valve 22 and the second gas valve 29 are used to control the flow rate and flow volume of the residual hydrocarbon gas.

[0060] A method for co-producing hydrocarbons and storing hydrogen from waste plastics and biomass pyrolysis using the aforementioned device includes the following steps:

[0061] Waste plastics and biomass raw materials are added to one of the crushing chambers 1 for crushing, and waste plastics are added to another crushing chamber 1 for crushing.

[0062] The crushed waste plastics and biomass raw materials enter the organic hydrogen storage liquid synthesis chamber 2. After being catalyzed by the reaction catalyst 3, the reaction temperature is 400℃-800℃. The resulting liquid unsaturated aromatic hydrocarbons are temporarily stored as organic hydrogen storage liquid in the organic hydrogen storage liquid temporary storage chamber 4. The gaseous products generated in the organic hydrogen storage liquid synthesis chamber 2 are used as carbon nanotube deposition raw materials and are pumped to the vapor phase deposition reaction chamber 31 by the vacuum pump 5.

[0063] The crushed waste plastic enters the melting chamber 26 for melting at a temperature of 150℃-200℃. The molten raw material enters the pyrolysis gasification chamber 27 for pyrolysis gasification reaction at a temperature of 450℃-550℃. The resulting pyrolysis gas is used as a raw material for carbon nanotube deposition and is pumped to the vapor phase deposition reaction chamber 31 by the vacuum pump 5.

[0064] The conveyor belt substrate catalyst moves in the vapor deposition reaction chamber 31, and the pyrolysis gas in the vapor deposition reaction chamber 31 deposits carbon nanotubes on the catalyst surface. The vapor deposition reaction temperature is 800℃.

[0065] After the product carried by the conveyor belt substrate catalyst is cooled in the cooling chamber 13, the carbon nanotubes are separated from the conveyor belt substrate catalyst in the mechanical exfoliation chamber 9. Then, the conveyor belt substrate catalyst is washed in the ultrasonic water washing chamber 8. Finally, the catalyst is dried and regenerated in the catalyst drying and regeneration chamber 7. The regenerated catalyst is carried by the conveyor belt 11 into the vapor deposition reaction chamber 31 to continue to participate in the reaction.

[0066] The organic hydrogen storage liquid in the organic hydrogen storage liquid temporary storage chamber 4 is sprayed into the organic hydrogen storage liquid hydrogenation reaction chamber 30 through the organic hydrogen storage liquid spraying device 21. The tail gas stored in the deposit tail gas temporary storage chamber 14 is sprayed out into the organic hydrogen storage liquid hydrogenation reaction chamber 30 through the deposition tail gas nozzle 17. The organic hydrogen storage liquid and the hydrogen in the tail gas undergo a hydrogenation reaction under the catalysis of the hydrogenation reaction catalyst 19. The reaction temperature is 160°C, thereby absorbing and storing the hydrogen in the tail gas.

[0067] The residual hydrocarbon gas discharged from the organic hydrogen storage liquid hydrogenation reaction chamber 30 enters the burner 28 for combustion. The high-temperature flue gas generated heats the insulating medium. Driven by the insulating medium circulation pump 24, the heated insulating medium circulates through the insulating medium circulation pipeline between the organic hydrogen storage liquid synthesis chamber 2, the melting chamber 26, the pyrolysis gasification chamber 27, the vapor phase deposition reaction chamber 31, and the insulating jacket of the organic hydrogen storage liquid hydrogenation reaction chamber 30 for heat supply.

[0068] This application proposes a method for the continuous preparation of carbon nanotubes through the coupling of pyrolysis and vapor deposition. The co-pyrolysis generates an organic hydrogen storage liquid for absorbing the co-produced hydrogen, thereby achieving environmentally friendly recycling and high-value reuse of waste plastics and biomass. The method enables the continuous and efficient preparation of carbon nanotubes, saves energy during device operation, and safely stores the co-produced hydrogen.

[0069] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for co-producing hydrocarbons and storing hydrogen through pyrolysis of waste plastics and biomass, characterized in that: include: The crushing device includes two crushing chambers, one of which is used to crush waste plastics and biomass raw materials, and the other crushing chamber is used to crush waste plastics. An organic hydrogen storage liquid synthesis device is used to synthesize organic hydrogen storage liquid by pyrolysis of crushed waste plastics and biomass raw materials. A pyrolysis melting device is used to melt and pyrolyze pulverized waste plastics to generate pyrolysis gas. A vapor phase deposition reactor is used to prepare carbon nanotubes by vapor phase deposition of the gaseous products of the organic hydrogen storage liquid synthesis device and the pyrolysis gas generated by the molten pyrolysis device. A hydrogen absorption device is used to absorb hydrogen in the tail gas generated by the gas phase deposition reactor, and the medium for absorbing hydrogen is the organic hydrogen storage liquid synthesized by the organic hydrogen storage liquid synthesis device. A gas and working fluid circulation device is used to supply heat to the organic hydrogen storage liquid synthesis device, the molten pyrolysis device, the vapor phase deposition reaction device and the hydrogen absorption device. A product separation and catalyst regeneration device is used to separate the products from the catalyst in the vapor deposition reactor and to regenerate the catalyst.

2. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 1, characterized in that: The organic hydrogen storage liquid synthesis device includes an organic hydrogen storage liquid synthesis chamber and an organic hydrogen storage liquid temporary storage chamber. The feed end of the organic hydrogen storage liquid synthesis chamber is connected to the pulverizing chamber, the gas outlet end of the organic hydrogen storage liquid synthesis chamber is connected to the vapor deposition reaction device, the liquid outlet end of the organic hydrogen storage liquid synthesis chamber is connected to the organic hydrogen storage liquid temporary storage chamber, and the liquid outlet end of the organic hydrogen storage liquid temporary storage chamber is connected to the hydrogen absorption device.

3. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 2, characterized in that: The molten pyrolysis apparatus includes a melting chamber and a pyrolysis gasification chamber. The feed end of the melting chamber is connected to the crushing chamber, and the gas outlet end of the pyrolysis gasification chamber is connected to the vapor deposition reactor.

4. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 3, characterized in that: The vapor deposition reactor includes a vapor deposition reaction chamber, a cooling chamber, and a deposition tail gas storage chamber. A conveyor belt is installed in the vapor deposition reaction chamber, and a catalyst is loaded on the conveyor belt.

5. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 4, characterized in that: The hydrogen absorption device includes an organic hydrogen storage liquid hydrogenation reaction chamber, in which a deposition tail gas nozzle and an organic hydrogen storage liquid spraying device are provided. The deposition tail gas nozzle is connected to the deposition tail gas temporary storage chamber, and the organic hydrogen storage liquid spraying device is connected to the organic hydrogen storage liquid temporary storage chamber.

6. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 5, characterized in that: The hydrogenation reaction chamber of the organic hydrogen storage liquid is fixedly equipped with a hydrogenation reaction catalyst, the organic hydrogen storage liquid spray device is located above the hydrogenation reaction catalyst, and the deposition tail gas nozzle is located below the hydrogenation reaction catalyst.

7. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 5, characterized in that: The deposition exhaust gas nozzle is connected to the deposition exhaust gas storage chamber via a gas delivery pipeline, which is equipped with a gas valve and a flow meter.

8. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 5, characterized in that: The organic hydrogen storage liquid spraying device is connected to the organic hydrogen storage liquid temporary storage chamber via a liquid delivery pipeline, which is equipped with a mechanical pump and an organic hydrogen storage liquid valve.

9. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 5, characterized in that: The gas and working fluid circulation device includes a residual hydrocarbon gas storage chamber, a burner, an insulated working fluid circulation pipeline, and an insulated working fluid circulation pump. The residual hydrocarbon gas storage chamber is connected to the upper part of the organic hydrogen storage liquid hydrogenation reaction chamber. The burner is used to burn the residual hydrocarbon gas and heat the insulated working fluid. The insulated working fluid circulates and supplies heat between the organic hydrogen storage liquid synthesis chamber, the melting chamber, the pyrolysis gasification chamber, the vapor deposition reaction chamber, and the organic hydrogen storage liquid hydrogenation reaction chamber through the insulated working fluid circulation pipeline.

10. The device for co-producing hydrocarbons and hydrogen through pyrolysis of waste plastics and biomass and for hydrogen absorption and storage according to claim 4, characterized in that: The product separation catalyst regeneration device includes a mechanical stripping chamber, an ultrasonic water washing chamber, and a catalyst drying and regeneration chamber arranged sequentially along the conveyor belt direction.

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