Solid oxide co-electrolysis driven carbon cycle liquid fuel production system

Abstract

The application relates to a solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system, which comprises a solid oxide electrolysis device configured to produce synthetic gas; a Fischer-Tropsch device in pipeline communication with the solid oxide electrolysis device; a multi-component separator in pipeline communication with the Fischer-Tropsch device; a feeding device in pipeline communication with the multi-component separator; and a combustion device in pipeline communication with the multi-component separator and the Fischer-Tropsch device. Hydrogen and the like can be sent into the feeding device to form gas raw material supplement and recycling, carbon monoxide and hydrogen can also be sent into the combustion device to generate high-temperature combustion products, the high-temperature combustion products are transported to the solid oxide electrolysis device, the gas raw material can be heated, high-temperature heat recovery is realized, and a high-grade heat source is provided for the solid oxide electrolysis device; therefore, the energy utilization efficiency of the system and the yield of the synthetic liquid fuel are remarkably improved.

Description

Technical Field

[0001] This application relates to the technical field of energy production equipment, and in particular to a carbon cycle liquid fuel production system driven by solid oxide co-electrolysis. Background Technology

[0002] To better address the ever-increasing carbon dioxide emissions, solid oxide electrolyzers (SOECs) offer significant advantages in energy conversion efficiency and carbon resource recycling due to their ability to efficiently co-electrolyze water and carbon dioxide at high temperatures to produce syngas (a mixture of H2 and CO). On the other hand, Fischer-Tropsch (FT) synthesis technology is a mature process for converting syngas into liquid fuels (such as diesel, gasoline, and aviation fuel), and it has been widely used in coal-to-oil and gas-to-oil industries. Its advantage lies in its ability to utilize syngas to produce high-energy-density liquid fuels, replacing traditional petroleum resources.

[0003] In recent years, the industry has proposed using syngas produced by SOEC directly as a feedstock for Fischer-Tropsch synthesis, thereby forming a highly coupled integrated system of "electro-thermal-chemical" processes to achieve efficient carbon dioxide recycling and fuel production. However, in existing technologies, SOEC and Fischer-Tropsch synthesis units often lack effective heat recovery and gas separation and utilization schemes, resulting in low overall energy efficiency, insufficient carbon utilization, and limited compatibility and integration between equipment. Summary of the Invention

[0004] Therefore, it is necessary to provide a carbon cycle liquid fuel preparation system driven by solid oxide co-electrolysis to address the problems of low energy efficiency and insufficient carbon utilization of traditional technologies.

[0005] This application proposes a solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system, which includes:

[0006] A solid oxide electrolysis unit, the solid oxide electrolysis unit being configured to produce syngas;

[0007] Fischer-Tropsch apparatus, wherein the Fischer-Tropsch apparatus is connected in pipeline to the solid oxide electrolysis apparatus;

[0008] A multi-component separator, wherein the multi-component separator is connected to the Fischer-Tropsch apparatus via piping;

[0009] A feeding device, wherein the feeding device is connected to the pipeline of the multi-component separator; and

[0010] A combustion device, which is connected in pipeline to the multi-component separator and the Fischer-Tropsch unit.

[0011] In this solid oxide co-electrolysis driven carbon cycle liquid fuel production system, the feeding device delivers gaseous feedstocks (including water, carbon dioxide, and water vapor) to the solid oxide electrolysis unit. These gaseous feedstocks undergo efficient co-electrolysis at high temperatures to produce syngas (a mixture of H2 and CO). The syngas is then fed into a Fischer-Tropsch unit, where it is converted into the desired liquid fuels (such as diesel, gasoline, and aviation fuel) and unused gaseous components (e.g., unreacted carbon monoxide, hydrogen, and short-chain hydrocarbons). Hydrogen can be fed back into the feeding device to replenish and recycle the gaseous feedstocks. Carbon monoxide and hydrogen can also be fed into a combustion unit to produce high-temperature combustion products. These products are then transported to the solid oxide electrolysis unit to heat the gaseous feedstocks, achieving high-temperature heat recovery and providing a high-grade heat source for the unit. This significantly improves the system's energy utilization efficiency and the yield of the synthesized liquid fuel.

[0012] The technical solution of this application will be further described below:

[0013] In one embodiment, the feeding device includes a hydrogen tank, a gas-liquid separator, and a first mixing chamber, wherein the gas-liquid separator and the hydrogen tank are respectively connected to the first mixing chamber via pipelines, and the Fischer-Tropsch device includes a carbon dioxide separator, wherein the first mixing chamber is also connected to the carbon dioxide separator via pipelines.

[0014] In one embodiment, the feeding device further includes a water reservoir, a water pump, a first heat exchanger, and a second mixing chamber, wherein the water reservoir, the water pump, the first heat exchanger, and the second mixing chamber are sequentially connected by pipelines, the water reservoir is also connected to the multi-component separator by pipelines, and the first mixing chamber is also connected to the second mixing chamber by pipelines.

[0015] In one embodiment, the solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system further includes a second heat exchanger, a third heat exchanger, and a fourth heat exchanger. The second mixing chamber is connected to the second heat exchanger via a pipeline, the second heat exchanger is connected to the third heat exchanger via a pipeline, the third heat exchanger is connected to the fourth heat exchanger via a pipeline, and the fourth heat exchanger is connected to the fuel electrode of the solid oxide electrolysis device.

[0016] The second heat exchanger is also connected to the carbon dioxide separator pipeline.

[0017] In one embodiment, the first heat exchanger is connected to the gas-water separator via a pipeline.

[0018] In one embodiment, the gas-water separator is connected to the water storage tank pipeline.

[0019] In one embodiment, the Fischer-Tropsch apparatus further includes a mixed gas compressor and a Fischer-Tropsch synthesis bed, wherein the inlet of the mixed gas compressor is connected to the carbon dioxide separator pipeline, the outlet of the mixed gas compressor is connected to the Fischer-Tropsch synthesis bed pipeline, and the outlet of the Fischer-Tropsch synthesis bed is connected to the multi-component separator pipeline.

[0020] In one embodiment, the combustion device includes a fifth heat exchanger and an oxygen-enriched burner. The fifth heat exchanger is connected between the Fischer-Tropsch synthesis bed and the multi-component separator. The multi-component separator is also connected to the oxygen-enriched burner via piping, and the oxygen-enriched burner is also connected to the fourth heat exchanger via piping.

[0021] In one embodiment, the combustion device further includes a sixth heat exchanger and an oxygen separator, wherein the fifth heat exchanger is connected to the sixth heat exchanger via pipeline, the sixth heat exchanger is connected to the oxygen separator via pipeline, and the oxygen separator is connected to the oxygen-enriched burner via pipeline.

[0022] In one embodiment, the combustion device further includes a seventh heat exchanger, which is connected in pipeline to the sixth heat exchanger and is also connected in pipeline to the air electrode of the solid oxide electrolysis device. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system; 10. Solid oxide electrolysis unit; 11. Fuel electrode; 12. Air electrode; 20. Fischer-Tropsch unit; 21. Mixed gas compressor; 22. Fischer-Tropsch synthesis bed; 23. Carbon dioxide separator; 30. Multi-component separator; 40. Feeding device; 41. Hydrogen tank; 42. Gas-water separator; 43. First mixing chamber; 44. Water storage tank; 45. Water pump; 46. First heat exchanger; 47. Second mixing chamber; 50. Combustion device; 51. Fifth heat exchanger; 52. Oxygen-enriched burner; 53. Sixth heat exchanger; 54. Seventh heat exchanger; 55. Oxygen separator; 60. Second heat exchanger; 60a. Third heat exchanger; 60b. Fourth heat exchanger. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal piping connection of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] See Figure 1 This application presents an embodiment of a solid oxide co-electrolysis-driven carbon cycle liquid fuel preparation system 100, which specifically relates to a process integration system that couples a solid oxide high-temperature co-electrolysis device with Fischer-Tropsch (FT) synthesis, aiming to achieve the recycling of carbon dioxide and water to prepare liquid fuels.

[0035] Please continue reading Figure 1 Specifically, an exemplary solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system 100 includes a solid oxide electrolysis device 10, a Fischer-Tropsch device 20, a multi-component separator 30, a feeding device 40, and a combustion device 50.

[0036] The solid oxide electrolysis unit 10 is configured to produce syngas; the Fischer-Tropsch unit 20 is connected to the solid oxide electrolysis unit 10 by pipeline; the multi-component separator 30 is connected to the Fischer-Tropsch unit 20 by pipeline; the feeding device 40 is connected to the multi-component separator 30 by pipeline; and the combustion device 50 is connected to the multi-component separator 30 and the Fischer-Tropsch unit 20 by pipeline.

[0037] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: When the solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system 100 of this embodiment is working, the feeding device 40 can supply gaseous raw materials (including water, carbon dioxide, and water vapor) to the solid oxide electrolysis device 10, and perform efficient co-electrolysis processing on the gaseous raw materials under high temperature conditions to produce syngas (a mixture of H2 and CO); then, the syngas is sent into the Fischer-Tropsch unit 20, and the syngas is converted into the required liquid fuel (such as diesel, gasoline, aviation fuel) through Fischer-Tropsch synthesis technology. The system can process fuels and other unused gaseous components (such as unreacted carbon monoxide, hydrogen, short-chain hydrocarbons, and other low-carbon hydrocarbons). Hydrogen and other gases can be fed into the feeding device 40 to supplement and recycle the gaseous raw materials. Carbon monoxide and hydrogen can also be fed into the combustion device 50 to produce high-temperature combustion products. The high-temperature combustion products are transported to the solid oxide electrolysis device 10 to heat the gaseous raw materials, achieving high-temperature heat recovery and providing a high-grade heat source for the solid oxide electrolysis device 10. This significantly improves the system's energy utilization efficiency and the yield of synthesized liquid fuels.

[0038] Please continue reading Figure 1 Based on the above embodiments, in one embodiment, the feeding device 40 includes a hydrogen tank 41, a gas-liquid separator 42 and a first mixing chamber 43. The gas-liquid separator 42 and the hydrogen tank 41 are respectively connected to the first mixing chamber 43 by pipeline. The Fischer-Tropsch device 20 includes a carbon dioxide separator 23. The first mixing chamber 43 is also connected to the carbon dioxide separator 23 by pipeline.

[0039] The hydrogen tank 41 serves as a hydrogen supply source, delivering hydrogen to the first mixing chamber 43. The gas-liquid separator 42 separates carbon dioxide and delivers it to the first mixing chamber 43, thus achieving a hydrogen-carbon dioxide mixture within the first mixing chamber 43. This mixture is used as a feedstock for the fuel electrode of the solid oxide electrolysis device 10, or for subsequent heat balance and proportioning.

[0040] It should be noted that the hydrogen tank 41 can be turned on or off by the operator manually operating the valve, or it can be turned off automatically by the controller and flow meter to control the solenoid valve. The choice can be made flexibly according to the actual needs, and no specific limitation is made here.

[0041] Please continue reading Figure 1Furthermore, the feeding device 40 also includes a water storage tank 44, a water pump 45, a first heat exchanger 46, and a second mixing chamber 47. The water storage tank 44, the water pump 45, the first heat exchanger 46, and the second mixing chamber 47 are connected in sequence by pipelines. The water storage tank 44 is also connected to the multi-component separator 30 by pipelines, and the first mixing chamber 43 is also connected to the second mixing chamber 47 by pipelines.

[0042] During operation, the water reservoir 44 supplies water to the water pump 45, allowing the water to flow into the first heat exchanger 46 under the drive of the water pump 45. After heat exchange with the first heat exchanger 46, water vapor is generated. The water vapor flows into the second mixing chamber 47 and is mixed a second time with the hydrogen-carbon dioxide mixture from the first mixing chamber 43 to form a hydrogen-carbon dioxide-water vapor mixture, which is used to supply the raw material to the fuel electrode of the solid oxide electrolysis device 10.

[0043] Please continue reading Figure 1 Furthermore, based on the above embodiments, the carbon cycle liquid fuel preparation system 100 driven by solid oxide co-electrolysis also includes a second heat exchanger 60, a third heat exchanger 60a, and a fourth heat exchanger 60b. The second mixing chamber 47 is connected to the second heat exchanger 60 by a pipeline, the second heat exchanger 60 is connected to the third heat exchanger 60a by a pipeline, the third heat exchanger 60a is connected to the fourth heat exchanger 60b by a pipeline, and the fourth heat exchanger 60b is connected to the fuel electrode 11 of the solid oxide electrolysis device.

[0044] A mixture of hydrogen, carbon dioxide, and water vapor enters the cold end of the second heat exchanger 60 for preheating. Then, the mixture flows sequentially through the cold ends of the third and fourth heat exchangers 60a and 60b, achieving a step-by-step heat exchange and temperature increase. This results in a mixed gas at a certain temperature that flows into the fuel electrode 11 of the solid oxide electrolysis device. The solid oxide electrolysis device 10 electrochemically reduces / converts water vapor and carbon dioxide at high temperatures, generating syngas (mainly carbon monoxide and hydrogen) and unreacted residual gas. The syngas is then drawn out from the outlet of the fuel electrode.

[0045] The second heat exchanger 60 is also connected to the carbon dioxide separator 23 via a pipeline. The high-temperature syngas from the fuel electrode outlet exchanges heat sequentially with the hot ends of the third heat exchanger 60a and the second heat exchanger 60, thereby providing heat to the cold-end gas entering the solid oxide electrolysis unit 10. After heat exchange, the syngas is introduced into the carbon dioxide separator 23 from the hot-end outlet of the second heat exchanger 60 for separation of syngas and carbon dioxide. In the carbon dioxide separator 23, a portion of the separated carbon dioxide is refluxed and merged with the carbon dioxide separated in the gas-water separator 42 before returning to the first mixing chamber 43 for mixing with hydrogen.

[0046] Furthermore, the first heat exchanger 46 is connected to the gas-water separator 42 via piping. The gas-water separator 42 is connected to the water storage tank 44 via piping. The connection between the first heat exchanger 46 and the gas-water separator 42 allows excess water after heat exchange to be returned to the gas-water separator 42, and then the gas-water separator 42 returns the excess water and the water after carbon dioxide separation to the water storage tank 44, thus achieving water recycling.

[0047] Please continue reading Figure 1 In addition, based on any of the above embodiments, the Fischer-Tropsch apparatus 20 further includes a mixed gas compressor 21 and a Fischer-Tropsch synthesis bed 22. The inlet of the mixed gas compressor 21 is connected to the carbon dioxide separator 23 pipeline, the outlet of the mixed gas compressor 21 is connected to the Fischer-Tropsch synthesis bed 22 pipeline, and the outlet of the Fischer-Tropsch synthesis bed 22 is connected to the multi-component separator 30 pipeline.

[0048] During operation, the synthesis gas separated by the carbon dioxide separator 23 is sent to the mixed gas compressor 21 for pressurization, and then discharged from the mixed gas compressor 21 and flows into the Fischer-Tropsch synthesis bed 22 for synthesis reaction to produce the desired liquid fuel, as well as the unreacted residual gas components.

[0049] Furthermore, based on the above embodiments, the combustion device 50 includes a fifth heat exchanger 51 and an oxygen-enriched burner 52. The fifth heat exchanger 51 is connected between the Fischer-Tropsch synthesis bed 22 and the multi-component separator 30. The multi-component separator 30 is also connected to the oxygen-enriched burner 52 via a pipeline. The oxygen-enriched burner 52 is also connected to the fourth heat exchanger 60b via a pipeline.

[0050] As is easily understood, the liquid fuel and the residual gas components together constitute the synthesis product. After being discharged from the Fischer-Tropsch synthesis bed 22, the synthesis product first enters the hot end of the fifth heat exchanger 51 for heat exchange, so as to realize the heat recovery and utilization of the synthesis product, and at the same time, it also plays a role in cooling the synthesis product. The cooled synthesis product enters the multi-component separator 30 for component separation processing, which can separate the target liquid fuel of the liquid phase component and the residual gas components (such as unreacted carbon monoxide, hydrogen, short-chain hydrocarbons and other low-carbon hydrocarbons). The residual gas components can be introduced into the combustion device 50 for use as fuel, so as to realize the full utilization of energy.

[0051] In one embodiment of this application, the combustion device 50 further includes a sixth heat exchanger 53 and an oxygen separator 55. The fifth heat exchanger 51 is connected to the sixth heat exchanger 53 by pipeline, the sixth heat exchanger 53 is connected to the oxygen separator 55 by pipeline, and the oxygen separator 55 is connected to the oxygen-enriched burner 52 by pipeline.

[0052] In the combustion device 50, the gaseous fuel (i.e., the residual gaseous components) undergoes full oxygen-enriched combustion with the oxygen separated from the oxygen separator 55. The high-temperature combustion products are introduced to the hot end inlet of the fourth heat exchanger 60b to further heat the gaseous feedstock fed into the fuel electrode 11 of the solid oxide electrolysis device 10, thereby recovering and utilizing high-temperature heat and improving the system's energy efficiency. The combustion gas discharged from the hot end outlet of the fourth heat exchanger 60b continues to connect with the hot end of the first heat exchanger 46 to further heat the water vapor, thereby raising the temperature of the water vapor. The gas from the hot end outlet after heat exchange is finally delivered to the gas-water separator 42 to complete the separation of carbon dioxide and water.

[0053] Please continue reading Figure 1 In addition, the combustion device 50 also includes a seventh heat exchanger 54, which is connected to the sixth heat exchanger 53 via a pipeline. The seventh heat exchanger 54 is also connected to the air electrode 12 of the solid oxide electrolysis device 10 via a pipeline. Air introduced from the cold end of the sixth heat exchanger 53 serves as the intake air for the air electrode 12 of the solid oxide electrolysis device 10. After undergoing multi-stage heat exchange (cold end of the sixth heat exchanger 53 → cold end of the fifth heat exchanger 51 → cold end of the seventh heat exchanger 54), the air enters the inlet of the air electrode 12 of the solid oxide electrolysis device 10. The reaction gas exiting the air electrode 12 of the solid oxide electrolysis device 10 undergoes heat recovery sequentially with the hot ends of the seventh heat exchanger 54 and the fifth heat exchanger 51, exchanges heat with the air introduced from the sixth heat exchanger 53, and finally enters the oxygen separator 55 for oxygen separation. The separated oxygen is supplied to the oxygen-enriched burner 52.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A carbon cycle liquid fuel preparation system driven by solid oxide co-electrolysis, characterized in that, include: A solid oxide electrolysis unit, the solid oxide electrolysis unit being configured to produce syngas; Fischer-Tropsch apparatus, wherein the Fischer-Tropsch apparatus is connected in pipeline to the solid oxide electrolysis apparatus; A multi-component separator, wherein the multi-component separator is connected to the Fischer-Tropsch apparatus via piping; A feeding device, wherein the feeding device is connected to the pipeline of the multi-component separator; and A combustion device, which is connected in pipeline to the multi-component separator and the Fischer-Tropsch unit.

2. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 1, characterized in that, The feeding device includes a hydrogen tank, a gas-liquid separator, and a first mixing chamber. The gas-liquid separator and the hydrogen tank are respectively connected to the first mixing chamber via pipelines. The Fischer-Tropsch device includes a carbon dioxide separator, and the first mixing chamber is also connected to the carbon dioxide separator via pipelines.

3. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 2, characterized in that, The feeding device further includes a water storage tank, a water pump, a first heat exchanger, and a second mixing chamber. The water storage tank, the water pump, the first heat exchanger, and the second mixing chamber are connected in sequence by pipelines. The water storage tank is also connected to the multi-component separator by pipelines, and the first mixing chamber is also connected to the second mixing chamber by pipelines.

4. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 3, characterized in that, The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system further includes a second heat exchanger, a third heat exchanger, and a fourth heat exchanger. The second mixing chamber is connected to the second heat exchanger via a pipeline, the second heat exchanger is connected to the third heat exchanger via a pipeline, the third heat exchanger is connected to the fourth heat exchanger via a pipeline, and the fourth heat exchanger is connected to the fuel electrode of the solid oxide electrolysis device. The second heat exchanger is also connected to the carbon dioxide separator pipeline.

5. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 4, characterized in that, The first heat exchanger is connected to the gas-water separator via pipeline.

6. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 5, characterized in that, The gas-water separator is connected to the water storage tank pipeline.

7. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 6, characterized in that, The Fischer-Tropsch unit further includes a mixed gas compressor and a Fischer-Tropsch synthesis bed. The inlet of the mixed gas compressor is connected to the carbon dioxide separator pipeline, the outlet of the mixed gas compressor is connected to the Fischer-Tropsch synthesis bed pipeline, and the outlet of the Fischer-Tropsch synthesis bed is connected to the multi-component separator pipeline.

8. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 7, characterized in that, The combustion device includes a fifth heat exchanger and an oxygen-enriched burner. The fifth heat exchanger is connected between the Fischer-Tropsch synthesis bed and the multi-component separator. The multi-component separator is also connected to the oxygen-enriched burner via piping. The oxygen-enriched burner is also connected to the fourth heat exchanger via piping.

9. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 8, characterized in that, The combustion device further includes a sixth heat exchanger and an oxygen separator. The fifth heat exchanger is connected to the sixth heat exchanger via pipeline, the sixth heat exchanger is connected to the oxygen separator via pipeline, and the oxygen separator is connected to the oxygen-enriched burner via pipeline.

10. The solid oxide co-electrolysis driven carbon cycle liquid fuel preparation system according to claim 9, characterized in that, The combustion device also includes a seventh heat exchanger, which is connected to the sixth heat exchanger via pipeline, and is also connected to the air electrode pipeline of the solid oxide electrolysis device.

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