Electricity-hydrogen-carbon collaborative conveying, control and utilization system

Abstract

The invention discloses an electricity-hydrogen-carbon collaborative conveying, control and utilization system, and belongs to the technical field of energy conveying. The system comprises a control system and a conveying pipeline, wherein the conveying pipeline comprises a first pipe body, a second pipe body and a third pipe body which are sequentially arranged from inside to outside; the first pipe body forms a first channel for conveying liquid hydrogen, a second channel is formed between the first pipe body and the second pipe body, the second channel is filled with liquid nitrogen, and a third channel for conveying liquid carbon dioxide is formed between the second pipe body and the third pipe body; a power cable is further arranged in the second channel and used for transmitting electric power. Cold energy in the conveying pipeline is distributed in a uniform gradient mode, multi-stage gradient utilization of the cold energy can be achieved, and the comprehensive energy utilization rate of the liquid hydrogen, liquid carbon dioxide and electric power collaborative conveying system is increased.

Description

Technical Field

[0001] This application belongs to the technical field of energy transmission, and specifically relates to a system for collaborative transmission, control, and utilization of electricity, hydrogen, and carbon. Background Art

[0002] Existing coal-fired power units are developing towards low-carbon emissions and high flexibility. The diversity and flexibility of end-use energy can be achieved by coupling the technical chain of hydrogen production from off-peak electricity, fuel cell power generation, and gaseous hydrogen / liquid hydrogen for transportation energy with coal-fired power units. In addition, carbon capture technology can enrich and utilize high-concentration carbon dioxide in the combustion exhaust gas of coal-fired power units, and it can be used for enhanced oil recovery and carbon sequestration in the downstream petrochemical industry, refrigerants in the food industry, etc. through liquid carbon dioxide transportation technology. A pipeline for collaborative and mixed transportation of energy by liquid hydrogen, liquid carbon dioxide, and a superconducting power cable is expected to become a new solution for centralized transportation of diverse and heterogeneous energy through multi-stage gradient utilization of the cold energy of liquid hydrogen.

[0003] In the prior art, hydrogen-electricity collaborative transportation pipelines often adopt a design with an internal superconducting cable and an external liquid hydrogen pipeline. During power transmission, the heat of the internal superconducting cable is transferred to the liquid hydrogen transportation pipeline, resulting in excessive evaporation loss of liquid hydrogen and reduced energy utilization efficiency. Moreover, the temperature difference gradient inside and outside the pipeline shows the characteristic of being low in the middle and high on both sides, and the cascade cold energy of liquid hydrogen is not fully utilized, leading to low energy utilization efficiency. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a system for collaborative transmission, control, and utilization of electricity, hydrogen, and carbon, which can solve the problem of low energy utilization efficiency of hydrogen-electricity collaborative transportation pipelines.

[0005] In a first aspect, the embodiments of this application provide a system for collaborative transmission, control, and utilization of electricity, hydrogen, and carbon. The system includes a control system and a transportation pipeline. The transportation pipeline includes a first pipe body, a second pipe body, and a third pipe body arranged in sequence from the inside to the outside;

[0006] The first pipe body forms a first channel for transporting liquid hydrogen. A second channel is formed between the first pipe body and the second pipe body, and liquid nitrogen is filled in the second channel. A third channel for transporting liquid carbon dioxide is formed between the second pipe body and the third pipe body;

[0007] A power cable is further arranged in the second channel, and the power cable is used for transporting electricity;

[0008] The control system is used to adjust the temperature and / or pressure of the first channel, the second channel, and the third channel.

[0009] Optionally, the pipe wall of the first pipe body facing the first channel is coated with a hydrogen barrier material to form a liquid hydrogen barrier coating.

[0010] Optionally, the power cable includes a superconducting cable, an insulating layer, and a protective layer. The protective layer is disposed outside the insulating layer, the superconducting cable is disposed inside the insulating layer, the insulating layer is made of an insulating material, and the protective layer is used to isolate the superconducting cable and liquid nitrogen.

[0011] Optionally, the number of the power cables is multiple, and the multiple power cables are uniformly disposed in the second channel.

[0012] Optionally, the conveying pipeline further includes a first reinforcing rib and a second reinforcing rib. One end of the first reinforcing rib is connected to the surface of the first pipe body facing the second channel, and the other end of the first reinforcing rib is connected to the surface of the second pipe body facing the second channel;

[0013] One end of the second reinforcing rib is connected to the surface of the second pipe body facing the third channel, and the other end of the second reinforcing rib is connected to the surface of the third pipe body facing the third channel.

[0014] Optionally, the control system includes a control center, a sensing device, and an adjusting device;

[0015] Both the sensing device and the adjusting device are connected to the control center. The sensing device is disposed in the conveying pipeline and is used to detect the temperature and / or pressure in the first channel, the second channel, and the third channel, and send the temperature and pressure in the first channel, the second channel, and the third channel to the control center; the control center is used to control the adjusting device to adjust the temperature and / or pressure in the first channel, the second channel, and the third channel based on the temperature and / or pressure in the first channel, the second channel, and the third channel.

[0016] Optionally, the sensing device includes a sensing pipeline, a first sensor, a second sensor, and a third sensor;

[0017] The sensing pipeline sequentially passes through the first pipe body, the second pipe body, and the third pipe body. The first sensor is disposed in the area of the sensing pipeline located in the first channel, the second sensor is disposed in the area of the sensing pipeline located in the second channel, and the third sensor is disposed in the area of the sensing pipeline located in the third channel;

[0018] The first sensor, the second sensor, and the third sensor are all electrically connected to the control center.

[0019] Optionally, the adjusting device includes a first adjusting pipeline, a first valve, a second adjusting pipeline, a second valve, a third adjusting pipeline, and a third valve;

[0020] One end of the first adjustment pipeline is connected to a hydrogen source, and the other end of the first adjustment pipeline passes through the first pipe body, the second pipe body and the third pipe body and is connected to the first channel. The first valve is arranged on the first adjustment pipeline, and the first valve is electrically connected to the control center. The control center is used to control the opening and closing of the first valve to adjust the temperature and / or pressure in the first channel.

[0021] One end of the second adjustment pipeline is connected to a nitrogen source, and the other end of the second adjustment pipeline passes through the first pipe body and the second pipe body and is connected to the second channel. The second valve is arranged on the second adjustment pipeline, and the second valve is electrically connected to the control center. The control center is used to control the opening and closing of the second valve to adjust the temperature and pressure in the second channel;

[0022] One end of the third adjustment pipeline is connected to a carbon dioxide source, and the other end of the third adjustment pipeline passes through the first pipe body and is connected to the third channel. The third valve is arranged on the third adjustment pipeline, and the third valve is electrically connected to the control center. The control center is used to control the opening and closing of the third valve to adjust the temperature and pressure in the third channel.

[0023] Optionally, the number of the sensing pipelines is multiple, and the distance between any two adjacent sensing pipelines is less than or equal to a preset distance.

[0024] In the embodiment of the present application, since the conveying pipeline has a multi-layer structure conveying pipeline, which are the first channel, the second channel and the third channel from inside to outside, and respectively have liquid hydrogen, liquid nitrogen and liquid carbon dioxide. Among them, the boiling point of liquid hydrogen is -252.87 °C, the boiling point of liquid nitrogen is -195.8 °C, and the boiling point of liquid carbon dioxide is -78.5 °C. Therefore, the cold energy in the conveying pipeline shows a uniform gradient distribution, and the multi-stage gradient utilization of cold energy can be realized, improving the comprehensive energy utilization rate of the liquid hydrogen, liquid carbon dioxide and power collaborative conveying system. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments of the present application. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the conveying pipeline provided by the embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of the control system provided by the embodiment of the present application.

[0028] Reference numerals:

[0029] 1. Third tube body; 2. Third channel; 3. Second tube body; 4. Reinforcing rib; 5. Second channel; 7. Protective layer; 8. Insulating layer; 9. Superconducting cable; 10. First tube body; 11. First channel; 12. Control center; 13. Sensing device; 14. Adjusting pipeline; 15. Third valve; 21. Hydrogen source; 22. First valve; 23. Nitrogen source; 24. Second valve; 25. Carbon dioxide source. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0031] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0032] The embodiments of the present application provide a system for coordinated transportation, control and utilization of electricity, hydrogen and carbon, including a control system and a transportation pipeline, as Figure 1 shown, the transportation pipeline provided by the embodiments of the present application includes a first tube body 10, a second tube body 3 and a third tube body 1 arranged in sequence from the inside to the outside;

[0033] The first tube body 10 forms a first channel 11 for transporting liquid hydrogen. A second channel 5 is formed between the first tube body 10 and the second tube body 3. Liquid nitrogen is filled in the second channel 5. A third channel 2 for transporting liquid carbon dioxide is formed between the second tube body 3 and the third tube body 1;

[0034] A power cable is also arranged in the second channel 5, and the power cable is used for transporting electricity;

[0035] The control system is used to adjust the temperature and / or pressure of the first channel 11, the second channel 5 and the third channel 2.

[0036] In this application, the conveying pipeline has a multi-layer structure. From the inside to the outside, there are a first channel 11, a second channel 5, and a third channel 2, which respectively contain liquid hydrogen, liquid nitrogen, and liquid carbon dioxide. Among them, the boiling point of liquid hydrogen is -252.87 °C, the boiling point of liquid nitrogen is -195.8 °C, and the boiling point of liquid carbon dioxide is -78.5 °C. Therefore, the cold energy in the conveying pipeline shows a uniform gradient distribution, enabling multi-level gradient utilization of cold energy, improving the comprehensive energy utilization rate of the liquid hydrogen, liquid carbon dioxide, and power collaborative conveying system, and can be used in scenarios such as carbon capture and carbon dioxide transportation in the combustion exhaust gas of coal-fired units, hydrogen production from renewable energy coupled with hydrogen and power collaborative conveying, and co-transportation of by-product hydrogen and carbon dioxide in the chemical industry, which can generate obvious economic benefits.

[0037] In addition, the power cable is fully surrounded by the liquid nitrogen cooling layer, creating a low-temperature working environment for the power cable to achieve superconducting power transmission, minimizing heat conduction, and effectively extending the service life of the power cable.

[0038] In addition, the control system is used to adjust the temperature and / or pressure of the first channel 11, the second channel 5, and the third channel 2, enabling the parameters during the operation of each channel to be within a safe range, and further extending the service life of the pipeline and the cable.

[0039] Optionally, the inner wall of the first pipe body 10 facing the first channel 11 is coated with a hydrogen-isolating material to form a liquid hydrogen barrier coating. In this embodiment, the hydrogen-isolating material can be a material formed by doping a bio-based polymer composite with an ortho-para hydrogen conversion catalyst, and a liquid hydrogen barrier dense coating is formed on the inner wall surface of the first pipe body 10, which can reduce the risk of pipeline hydrogen embrittlement and increase the ortho-hydrogen ratio during liquid hydrogen transportation.

[0040] Optionally, the power cable includes a superconducting cable 9, an insulating layer 8, and a protective layer 7. The protective layer 7 is disposed outside the insulating layer 8, and the superconducting cable 9 is disposed inside the insulating layer 8. The insulating layer 8 is made of an insulating material, and the protective layer 7 is used to isolate the superconducting cable 9 from the liquid nitrogen.

[0041] Among them, the protective layer 7 is used to achieve the isolation and sufficient heat conduction effect between the superconducting cable 9 and the liquid nitrogen. The insulating layer 8 is prepared from materials such as polypropylene layer composite paper, polyimide, and polyaramide. The superconducting cable 9 uses yttrium barium copper oxide material and adopts a coaxial structure design for the positive and negative poles, making the cable structure more compact and eliminating external electromagnetic interference.

[0042] Optionally, the number of power cables is multiple, and multiple power cables are evenly arranged in the second channel 5.

[0043] In Figure 1 the illustrated embodiment, four power cables are provided, and the voltage levels and transmission currents of the four power cables are independent of each other, and the voltage and current can be flexibly adjusted according to the transmission scale.

[0044] Optionally, the conveying pipeline further includes a first reinforcing rib 4 and a second reinforcing rib 4. One end of the first reinforcing rib 4 is connected to the surface of the first pipe body 10 facing the second channel 5, and the other end of the first reinforcing rib 4 is connected to the surface of the second pipe body 3 facing the second channel 5;

[0045] One end of the second reinforcing rib 4 is connected to the surface of the second pipe body 3 facing the third channel 2, and the other end of the second reinforcing rib 4 is connected to the surface of the third pipe body 1 facing the third channel 2.

[0046] In this embodiment, the arrangement of the reinforcing rib 4 can enhance the structural stability of different pipeline flow layers.

[0047] As Figure 2 shown, the control system includes a control center 12, a sensing device 13 and an adjusting device;

[0048] The sensing device 13 and the adjusting device are both connected to the control center 12. The sensing device 13 is arranged inside the conveying pipeline. The sensing device 13 is used to detect the temperature and / or pressure in the first channel 11, the second channel 5, and the third channel 2, and send the temperature and pressure in the first channel 11, the second channel 5, and the third channel 2 to the control center 12; the control center 12 is used to control the adjusting device to adjust the temperature and / or pressure in the first channel 11, the second channel 5, and the third channel 2 based on the temperature and / or pressure in the first channel 11, the second channel 5, and the third channel 2.

[0049] The sensing device 13 can be used to measure the temperature and pressure of each channel, and the adjusting device can be used to adjust the temperature and pressure of each channel, which can avoid the situation that the temperature and pressure in the channel exceed the safety limit, and can improve the conveying safety of the conveying pipeline.

[0050] Optionally, the sensing device 13 includes a sensing pipeline, a first sensor, a second sensor and a third sensor;

[0051] The sensing pipeline sequentially passes through the first pipe body 10, the second pipe body 3 and the third pipe body 1. The first sensor is arranged in the area of the sensing pipeline located in the first channel 11, the second sensor is arranged in the area of the sensing pipeline located in the second channel 5, and the third sensor is arranged in the area of the sensing pipeline located in the third channel 2;

[0052] The first sensor, the second sensor and the third sensor are all electrically connected to the control center 12.

[0053] Please further refer to Figure 2, the sensing device 13 includes a sensing pipeline. The sensing pipeline is inserted into the conveying pipeline through an opening, so that the first sensor, the second sensor, and the third sensor can detect the temperature and pressure of the first channel 11, the second channel 5, and the third channel 2 respectively. The structure is simple and convenient for production. Only when the temperature and pressure of each pipeline can be accurately detected can the temperature and pressure of each pipeline be accurately adjusted, thereby improving the safety of pipeline transportation.

[0054] Optionally, the adjusting device includes a first adjusting pipeline, a first valve 22, a second adjusting pipeline, a second valve 24, a third adjusting pipeline, and a third valve 15;

[0055] One end of the first adjusting pipeline is connected to the hydrogen source 21, and the other end of the first adjusting pipeline passes through the first pipe body 10, the second pipe body 3, and the third pipe body 1 and is connected to the first channel 11. The first valve 22 is arranged on the first adjusting pipeline, and the first valve 22 is electrically connected to the control center 12. The control center 12 is used to control the opening and closing of the first valve 22 to adjust the temperature and / or pressure in the first channel 11.

[0056] One end of the second adjusting pipeline is connected to the nitrogen source 23, and the other end of the second adjusting pipeline passes through the first pipe body 10 and the second pipe body 3 and is connected to the second channel 5. The second valve 24 is arranged on the second adjusting pipeline, and the second valve 24 is electrically connected to the control center 12. The control center 12 is used to control the opening and closing of the second valve 24 to adjust the temperature and pressure in the second channel 5;

[0057] One end of the third adjusting pipeline is connected to the carbon dioxide source, and the other end of the third adjusting pipeline passes through the first pipe body 10 and is connected to the third channel 2. The third valve 15 is arranged on the third adjusting pipeline, and the third valve 15 is electrically connected to the control center 12. The control center 12 is used to control the opening and closing of the third valve 15 to adjust the temperature and pressure in the third channel 2.

[0058] Please further refer to Figure 2 , the adjusting device includes an adjusting pipeline, and the adjusting pipeline includes: a first adjusting pipeline communicating with the first channel 11, a second adjusting pipeline communicating with the second channel 5, and a third adjusting pipeline communicating with the third channel 2. Among them, the first adjusting pipeline is connected to the hydrogen recycling station, the second adjusting pipeline is connected to the nitrogen recycling station, and the third adjusting pipeline is connected to the carbon dioxide recycling station.

[0059] When the pressure is higher than the set pressure threshold, the intelligent control center 12 controls to open the corresponding first valve 22, second valve 24 or third valve 15 respectively, so that liquid hydrogen, liquid nitrogen or liquid carbon dioxide is added to the hydrogen recycling station, nitrogen recycling station or carbon dioxide recycling station respectively until the pressure is not higher than the set pressure threshold; when the temperature of liquid hydrogen, liquid nitrogen or liquid carbon dioxide is higher than the corresponding set temperature threshold, the intelligent control center 12 controls to start the corresponding supporting compressor and heat exchanger to lower the temperature of liquid hydrogen, liquid nitrogen or liquid carbon dioxide until the temperature is not higher than the corresponding set temperature threshold. In the above way, the safety of pipeline transportation can be improved.

[0060] Optionally, the number of sensing pipelines is multiple, and the distance between any two adjacent sensing pipelines is less than or equal to a preset distance.

[0061] In this embodiment, the preset distance can be 100 meters. A sensing pipeline is set at every preset distance interval, so as to monitor the temperature and pressure of each channel in the conveying pipeline in real time and make corresponding adjustments, thereby improving the safety of pipeline transportation.

[0062] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0063] The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An electricity, hydrogen and carbon coordinated transport, control and utilization system, characterized in that: The system includes a control system and a delivery pipeline, wherein the delivery pipeline includes a first pipe body, a second pipe body and a third pipe body arranged in sequence from the inside to the outside; The first tube body forms a first channel for conveying liquid hydrogen, a second channel is formed between the first tube body and the second tube body, the second channel is filled with liquid nitrogen, and a third channel for conveying liquid carbon dioxide is formed between the second tube body and the third tube body; A power cable is also provided in the second channel, and the power cable is used to transmit power; The control system is used to adjust the temperature and / or pressure of the first channel, the second channel, and the third channel.

2. The electricity-hydrogen-carbon coordinated transport, control and utilization system according to claim 1, characterized in that: A tube wall of the first tube body facing the first channel is coated with a hydrogen-isolating material to form a liquid hydrogen-isolating coating.

3. The electricity-hydrogen-carbon coordinated transport, control and utilization system according to claim 1, characterized in that: The power cable comprises a superconducting cable, an insulating layer and a protective layer, wherein the protective layer is arranged outside the insulating layer, the superconducting cable is arranged inside the insulating layer, the insulating layer is made of insulating material, and the protective layer is used to isolate the superconducting cable from liquid nitrogen.

4. The electricity-hydrogen-carbon coordinated transport, control and utilization system according to claim 3, characterized in that: There are multiple power cables, and the multiple power cables are evenly arranged in the second channel.

5. The electricity-hydrogen-carbon coordinated transport, control and utilization system according to any one of claims 1 to 3, characterized in that: The delivery pipeline further includes a first reinforcing rib and a second reinforcing rib, one end of the first reinforcing rib is connected to a surface of the first tube body facing the second channel, and the other end of the first reinforcing rib is connected to a surface of the second tube body facing the second channel; One end of the second reinforcing rib is connected to a surface of the second tube body facing the third channel, and the other end of the second reinforcing rib is connected to a surface of the third tube body facing the third channel.

6. The electricity-hydrogen-carbon coordinated transport, control and utilization system according to claim 5, characterized in that: The control system includes a control center, a sensor device and a regulating device; The sensing device and the regulating device are both connected to the control center. The sensing device is arranged in the delivery pipeline. The sensing device is used to detect the temperature and / or pressure in the first channel, the second channel, and the third channel, and send the temperature and pressure in the first channel, the second channel, and the third channel to the control center. The control center is used to control the regulating device to regulate the temperature and / or pressure of the first channel, the second channel, and the third channel based on the temperature and / or pressure in the first channel, the second channel, and the third channel.

7. The electricity, hydrogen and carbon coordinated transport, control and utilization system according to claim 6, characterized in that: The sensing device comprises a sensing pipeline, a first sensor, a second sensor and a third sensor; The sensing pipe passes through the first pipe body, the second pipe body and the third pipe body in sequence, the first sensor is arranged in the area where the sensing pipe is located in the first channel, the second sensor is arranged in the area where the sensing pipe is located in the second channel, and the third sensor is arranged in the area where the sensing pipe is located in the third channel; The first sensor, the second sensor and the third sensor are all electrically connected to the control hub.

8. The electricity, hydrogen and carbon coordinated transport, control and utilization system according to claim 6, characterized in that: The regulating device comprises a first regulating pipeline, a first valve, a second regulating pipeline, a second valve, a third regulating pipeline and a third valve; One end of the first regulating pipeline is connected to a hydrogen source, and the other end of the first regulating pipeline passes through the first tube body, the second tube body and the third tube body to be connected to the first channel. The first valve is arranged on the first regulating pipeline, and the first valve is electrically connected to the control hub. The control hub is used to control the opening and closing of the first valve to adjust the temperature and / or pressure in the first channel. One end of the second regulating pipeline is connected to a nitrogen source, and the other end of the second regulating pipeline passes through the first pipe body and the second pipe body and is connected to the second channel. The second valve is arranged on the second regulating pipeline, and the second valve is electrically connected to the control hub. The control hub is used to control the opening and closing of the second valve to adjust the temperature and pressure in the second channel. One end of the third regulating pipeline is connected to a carbon dioxide source, and the other end of the third regulating pipeline passes through the first tube body and is connected to the third channel. The third valve is arranged on the third regulating pipeline, and the third valve is electrically connected to the control hub. The control hub is used to control the opening and closing of the third valve to adjust the temperature and pressure in the third channel.

9. The electricity, hydrogen and carbon coordinated transport, control and utilization system according to claim 7, characterized in that: There are multiple sensing pipes, and the distance between any two adjacent sensing pipes is less than or equal to a preset distance.

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