An integrated power generation system that achieves zero carbon emissions

Abstract

An embodiment of the present disclosure provides a comprehensive power generation system that achieves zero carbon emissions, including: a renewable power generation unit, a green fuel preparation device, a thermal power unit, and a carbon capture device. The renewable power generation unit is used to generate electricity using renewable energy. The renewable power generation unit is connected to the green fuel preparation device, which is used to supply electricity to the green fuel preparation device. The green fuel preparation device is used to prepare green fuel. The green fuel preparation device is connected to the thermal power unit. The thermal power unit is used to generate electricity using green fuel and fossil fuel. Part of the carbon capture device is connected to the thermal power unit, and the carbon capture device is used to capture carbon dioxide in the flue gas discharged by the thermal power unit. The green fuel is prepared by the green fuel preparation device and transported to the thermal power unit, so that the green fuel is burned in the thermal power unit without carbon emissions. The carbon capture device captures carbon dioxide in the flue gas generated by the combustion of fossil fuel in the thermal power unit, thereby achieving zero carbon emissions in the zero-carbon power generation system.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the field of power generation technology, and specifically relate to an integrated power generation system that achieves zero carbon emissions. Background Art

[0002] Traditional power generation systems use fossil fuels as their primary fuel. Burning fossil fuels produces large amounts of carbon dioxide, a greenhouse gas that contributes to global warming. Therefore, there is an urgent need for a power generation system that reduces carbon emissions. Summary of the Invention

[0003] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide an integrated power generation system that achieves zero carbon emissions.

[0004] An embodiment of a first aspect of the present disclosure provides an integrated power generation system for achieving zero carbon emissions, comprising: a renewable power generation unit configured to generate electricity using renewable energy;

[0005] A green fuel preparation device, the renewable generator set is connected to the green fuel preparation device, the renewable generator set is used to supply electricity to the green fuel preparation device, and the green fuel preparation device is used to prepare green fuel, and the green fuel does not contain carbon elements;

[0006] A thermal power generation unit, the green fuel preparation device being connected to the thermal power generation unit, the thermal power generation unit being used to generate electricity using green fuel and fossil fuel;

[0007] A carbon capture device is connected to the thermal power unit, and includes a CCUS device and a DAC device. The CCUS device is used to capture carbon dioxide in the flue gas discharged by the thermal power unit, and the DAC device is used to capture carbon dioxide in the air. The total amount of carbon dioxide captured by the CCUS device and the DAC device is equal to the amount of carbon dioxide generated by the combustion of fossil fuels in the thermal power unit.

[0008] In some embodiments of the present disclosure, the green fuel production device is at least one of a hydrogen production device and an ammonia production device.

[0009] In some embodiments of the present disclosure, the integrated power generation system for achieving zero carbon emissions further includes:

[0010] A biomass supply device is connected to a thermal power unit and is used to supply biomass fuel to the thermal power unit.

[0011] In some embodiments of the present disclosure, the integrated power generation system for achieving zero carbon emissions further includes:

[0012] A zero-carbon fuel storage device is connected to the green fuel preparation device, the zero-carbon fuel storage device is connected to the biomass supply device, the zero-carbon fuel storage device is connected to the thermal power unit, and the zero-carbon fuel storage device is used to supply biomass fuel and green fuel to the thermal power unit.

[0013] In some embodiments of the present disclosure, the carbon capture device includes:

[0014] A carbon capture container is connected to the thermal power unit and is used to accommodate flue gas exhausted by the thermal power unit. The CCUS device is in communication with the carbon capture container and is used to capture carbon dioxide within the carbon capture container. The DAC device is disposed outside the carbon capture container and is close to the exhaust port of the carbon capture container. The carbon dioxide captured by the DAC device comes from the carbon dioxide in the gas exhausted by the carbon capture container and the carbon dioxide in the atmosphere.

[0015] In some embodiments of the present disclosure, the carbon capture device further includes a carbon dioxide storage device, which is connected to the CCUS device, and the carbon dioxide storage device is connected to the DAC device.

[0016] In some embodiments of the present disclosure, the renewable power generation set is connected to the CCUS device, and the renewable power generation set is connected to the DAC device, and the renewable power generation set is used to provide electrical energy to the CCUS device and the DAC device.

[0017] In some embodiments of the present disclosure, the thermal power unit includes:

[0018] A boiler, wherein the fuel inlet of the boiler is connected to the green fuel preparation device, and the exhaust port of the boiler is connected to the carbon capture device;

[0019] a steam turbine, the boiler being connected to the steam turbine;

[0020] A generator, the steam turbine and the generator, and the generator are connected to a power grid.

[0021] In some embodiments of the present disclosure, the thermal power unit further comprises:

[0022] a heat storage device connected to at least one of the power grid, the renewable power generation set, and the generator, the heat storage device being connected to the steam turbine, and the heat storage device being used to store electrical energy from at least one of the power grid, the renewable power generation set, and the generator in the form of thermal energy.

[0023] In some embodiments of the present disclosure, the thermal power unit further comprises:

[0024] A fossil fuel supply device is connected to the boiler and is used to supply fossil fuel to the boiler.

[0025] According to the embodiment of the present disclosure, the integrated power generation system for achieving zero carbon emissions includes a renewable generator set, a green fuel preparation device, a thermal power unit and a carbon capture device. The renewable generator set uses renewable energy to generate electricity. The renewable generator set is connected to the green fuel preparation device. The renewable generator set provides electricity to the green fuel preparation device to make the power supply of the green fuel preparation device green and prevent carbon emissions. The green fuel preparation device is directly or indirectly connected to the boiler of the thermal power unit. The green fuel preparation device is used to provide green energy such as hydrogen and ammonia to the thermal power unit. Green fuels such as hydrogen and ammonia do not contain carbon elements, and the green fuel will not produce carbon emissions when burned in the thermal power unit. Release, thereby achieving zero carbon emissions from the combustion of green fuels; the thermal power unit is also used to achieve power generation by burning fossil fuels. The thermal power unit is connected to a carbon capture device. Fossil fuels containing carbon elements are burned in the thermal power unit to produce flue gas containing carbon. The carbon-containing flue gas is discharged from the thermal power unit and enters the carbon capture device to capture carbon dioxide in the flue gas through carbon capture. In addition, the carbon capture device also captures carbon dioxide in the air. The carbon dioxide in the flue gas and the carbon dioxide in the air are captured by the carbon capture device so that the amount of carbon dioxide captured by the carbon capture device is the same as the amount of carbon dioxide generated by the combustion of fossil fuels, that is, zero carbon emissions of the zero-carbon power generation system are achieved.

[0026] In addition, the integrated power generation system that achieves zero carbon emissions in this embodiment can also achieve peak and frequency regulation, reduce the impact of renewable power generation units on the power grid, maintain power grid stability, and achieve power safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of a comprehensive power generation system for achieving zero carbon emissions according to the first embodiment of the present disclosure.

[0028] The reference numerals in the accompanying drawings represent the following:

[0029] 100. Achieve a zero-carbon emission integrated power generation system;

[0030] 10. Renewable power generation units;

[0031] 20. Green fuel preparation device;

[0032] 30. Thermal power unit; 31. Boiler; 32. Steam turbine; 33. Generator; 34. Fossil fuel supply device; 35. Heat storage device;

[0033] 40. Carbon capture device; 41. Carbon capture vessel; 42. CCUS device; 43. DAC device; 44. Carbon dioxide storage;

[0034] 50. Biomass supply device;

[0035] 60. Zero-carbon fuel storage device;

[0036] 70. Power grid. DETAILED DESCRIPTION

[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of the stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The control method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0039] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0040] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature would then be oriented as "above" or "above" the other element or feature. Thus, the example term "below" can encompass both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0041] like Figure 1 As shown, the present disclosure provides an integrated power generation system 100 for achieving zero carbon emissions, including: a renewable power generation unit 10, a green fuel preparation device 20, a thermal power unit 30 and a carbon capture device 40, the renewable power generation unit 10 is used to generate electricity using renewable energy, the renewable power generation unit 10 is connected to the green fuel preparation device 20, the renewable power generation unit 10 is used to supply electricity to the green fuel preparation device 20, the green fuel preparation device 20 is used to prepare green fuel, the green fuel preparation device 20 is connected to the thermal power unit 30, the thermal power unit 30 is used to generate electricity using green fuel and fossil fuel, the carbon capture device 40 is connected to the thermal power unit 30, and the carbon capture device 40 is used to capture carbon dioxide in the flue gas discharged by the thermal power unit 30 and carbon dioxide in the atmosphere.

[0042] According to an embodiment of the present disclosure, a comprehensive power generation system 100 for achieving zero carbon emissions includes a renewable power generation unit 10, a green fuel preparation device 20, a thermal power generation unit 30, and a carbon capture device 40. The renewable power generation unit 10 generates electricity using renewable energy. The renewable power generation unit 10 is connected to the green fuel preparation device 20. The renewable power generation unit 10 provides electricity to the green fuel preparation device 20, so as to make the power supply of the green fuel preparation device 20 green and prevent carbon emissions. The green fuel preparation device 20 is directly or indirectly connected to the boiler 31 of the thermal power generation unit 30. The green fuel preparation device 20 is used to provide green energy such as hydrogen and ammonia to the thermal power generation unit 30. Green fuels such as hydrogen and ammonia do not contain carbon elements. Green fuels are used in the thermal power generation unit 30. The internal fuel does not produce carbon emissions, thereby achieving zero carbon emissions from green fuel combustion; the thermal power unit 30 is also used to achieve power generation by burning fossil fuels. The thermal power unit 30 is connected to the carbon capture device 40. The fossil fuel containing carbon elements burns in the thermal power unit 30 to produce flue gas containing carbon. The carbon-containing flue gas is discharged from the thermal power unit 30 and enters the carbon capture device 40 to capture carbon dioxide in the flue gas through carbon capture. In addition, the carbon capture device 40 also captures carbon dioxide in the air. The carbon capture device 40 captures carbon dioxide in the flue gas and carbon dioxide in the air so that the amount of carbon dioxide captured by the carbon capture device 40 is the same as the amount of carbon dioxide generated by the combustion of fossil fuels, that is, achieving zero carbon emissions from the zero-carbon power generation system. In addition, the renewable power generation unit 10 is used to power the green fuel preparation device 20, and can also reduce the impact of unstable power generation of the renewable power generation unit 10 on the power grid, thereby improving the stability of the power grid.

[0043] The renewable power generation unit 10 in this embodiment can use solar power generation, wind power generation, hydropower generation, geothermal power generation, etc. The renewable power generation unit 10 does not generate carbon emissions during the power generation process, thereby ensuring zero carbon emissions of the zero-carbon power generation system.

[0044] In some embodiments of the present disclosure, the green fuel preparation device 20 is a hydrogen production device, the green fuel preparation device 20 is an ammonia production device, or the green fuel preparation device 20 includes a hydrogen production device and an ammonia production device. Green hydrogen fuel is prepared by the green fuel preparation device 20, or green ammonia fuel is prepared, thereby realizing green fuel preparation of the green fuel preparation device 20. It should be noted that the hydrogen fuel prepared by the green fuel preparation device 20 in this embodiment does not contain carbon elements, and the ammonia fuel prepared by the green fuel preparation device 20 does not contain carbon elements, so as to ensure that the hydrogen fuel or ammonia fuel does not produce carbon dioxide when burned in the thermal power unit 30, thereby realizing zero emission of green fuel combustion.

[0045] The hydrogen production device in this embodiment may be a water electrolysis hydrogen production device, a photocatalytic decomposition device, a biological fermentation device, a thermochemical cycle hydrogen production device, etc. The ammonia production device in this embodiment may be an electrochemical ammonia synthesis device, a photocatalytic ammonia synthesis device, a biological nitrogen fixation device, etc. The hydrogen production device in this embodiment has zero carbon emissions during the hydrogen production process. The ammonia production device in this embodiment has zero carbon emissions during the ammonia production process, ensuring that the green fuel production device 20 does not generate carbon emissions during the green fuel production process.

[0046] In some embodiments of the present disclosure, the integrated power generation system 100 for achieving zero carbon emissions further includes: a biomass supply device 50, which is directly or indirectly connected to the boiler 31 of the thermal power unit 30, and the biomass supply device 50 is used to supply biomass fuel to the thermal power unit 30. Specifically, the biomass supply device 50 is directly connected to the boiler 31 of the thermal power unit 30, and the biomass supply device 50 transports the biomass fuel to the boiler 31 of the thermal power unit 30 for combustion. The biomass fuel will produce certain carbon emissions during the combustion process, but because the plants that produce the biomass fuel absorb or fix a certain amount of carbon from the atmosphere during their growth, after the biomass fuel is burned, all the carbon absorbed or fixed is released and discharged into the atmosphere, that is, the carbon emitted by the combustion of the biomass fuel is the carbon absorbed or fixed during the production process of its raw materials, which is equivalent to the combustion of the biomass fuel not generating additional carbon emissions, and zero carbon emissions are achieved by the combustion of biomass fuel. Specifically, biomass fuel refers to organic matter formed by photosynthesis, including plants, animals and their waste. By adjusting the amount of biomass fuel delivered to the thermal power unit 30 by the biomass supply device 50 and the amount of green fuel delivered to the thermal power unit 30 by the green fuel preparation device 20, the zero-carbon power generation system can meet the needs of peak load and frequency regulation.

[0047] In some embodiments of the present disclosure, the integrated power generation system 100 for achieving zero carbon emissions further includes: a zero-carbon fuel storage device 60, the zero-carbon fuel storage device 60 is connected to the green fuel preparation device 20, the zero-carbon fuel storage device 60 is connected to the biomass supply device 50, the zero-carbon fuel storage device 60 is connected to the thermal power unit 30, and the zero-carbon fuel storage device 60 is used to supply biomass fuel and green fuel to the thermal power unit 30. The green fuel prepared by the green fuel preparation device 20 is stored by the zero-carbon fuel storage device 60, and the biomass fuel is stored by the zero-carbon fuel storage device 60, so that the green fuel and the biomass fuel are stored and mixed in the zero-carbon fuel storage device 60. According to the demand characteristics of the zero-carbon power generation system, the amount of zero-carbon fuel input from the zero-carbon fuel storage device 60 to the boiler 31 of the thermal power unit 30 is adjusted, so that the zero-carbon power generation system meets the needs of peak shaving and frequency regulation.

[0048] In some embodiments of the present disclosure, a thermal power generation unit 30 includes a boiler 31, wherein the fuel inlet of the boiler 31 is directly or indirectly connected to the green fuel preparation device 20, and the green fuel prepared by the green fuel preparation device 20 is directly or indirectly input into the boiler 31 through the zero-carbon fuel storage device 60. The combustion of the green fuel in the boiler 31 does not produce carbon emissions, that is, the green fuel prepared by the green fuel preparation device 20 can achieve zero carbon emissions when burned in the boiler 31. The fuel inlet of the boiler 31 is directly or indirectly connected to the biomass supply device 50, and the biomass fuel is directly transported to the hot pot by the biomass supply device 50, or the biomass fuel is transported from the biomass supply device 50 to the zero-carbon fuel storage device 60, and then transported from the zero-carbon fuel storage device 60 to the boiler 31, so that the combustion of the biomass fuel in the boiler 31 achieves zero carbon emissions.

[0049] The exhaust port of the boiler 31 is connected to the carbon capture device 40, and the CCUS device 42 and DAC device 43 of the carbon capture device 40 are used to capture the carbon dioxide in the flue gas discharged from the boiler 31. Most of the carbon dioxide in the flue gas is captured by the CCUS device 42 and then discharged into the air. The DAC device 43 of the carbon capture device 40 is used to capture the carbon dioxide in the air so that the amount of carbon dioxide captured by the CCUS device 42 and DAC device 43 of the carbon capture device 40 is equal to the amount of carbon dioxide generated by the combustion of fossil fuels, thereby balancing the amount of carbon dioxide captured by the zero-carbon power generation system and the amount of carbon dioxide generated, thereby achieving zero carbon emissions of the power generation system of this embodiment.

[0050] In this example, CCUS device 42 (Carbon Capture, Utilization, and Storage) is a collection of technologies designed to reduce the release of carbon dioxide from flue gas into the atmosphere, thereby mitigating the impact of climate change. DAC device 43 (Direct Air Capture) generally refers to a device that captures carbon dioxide directly from the atmosphere.

[0051] Thermal power unit 30 also includes a steam turbine 32 and a generator 33. Boiler 31 is connected to steam turbine 32, which is in turn connected to generator 33. Generator 33 is connected to power grid 70. High-temperature, high-pressure steam generated by combustion in boiler 31 is transported to steam turbine 32, which converts the energy of the high-temperature, high-pressure steam into mechanical energy. This mechanical energy then powers generator 33, which then converts the mechanical energy into electrical energy and transmits the electrical energy to power grid 70.

[0052] In some embodiments of the present disclosure, the thermal power unit 30 further includes: a fossil fuel supply device 34, the fossil fuel supply device 34 is connected to the boiler 31, and the fossil fuel supply device 34 is used to supply fossil fuel to the boiler 31. Since biomass fuel, hydrogen fuel, and ammonia fuel are more difficult to obtain than fossil fuels, in order to ensure the normal operation of the thermal power unit 30, the thermal power unit 30 also uses fossil fuel as fuel, that is, the thermal power unit 30 can use fossil fuel and green fuel as fuel, or the thermal power unit 30 uses fossil fuel, green fuel and biomass fuel as fuel. The flue gas generated by the combustion of fossil fuel in the boiler 31 contains carbon dioxide, and the carbon dioxide in the flue gas is captured twice by the carbon capture device 40, thereby ensuring that the carbon dioxide generated by the combustion of fossil fuel is completely captured by the carbon capture device 40, thereby achieving zero carbon emissions of the power generation system of this embodiment.

[0053] In some embodiments of the present disclosure, the thermal power generation unit 30 further includes a heat storage device 35. The heat storage device 35 is connected to at least one of the power grid 70, the renewable power generation unit 10, and the generator 33. The heat storage device 35 is also connected to the steam turbine 32. The heat storage device 35 is used to store electrical energy from at least one of the power grid 70, the renewable power generation unit 10, and the generator 33 in the form of thermal energy. When user power demand is low, the power grid 70 transmits a portion of its electricity to the heat storage device 35, which stores the electrical energy as thermal energy. When user power demand is high, the heat storage device 35 releases the thermal energy to the steam turbine 32, which converts the heat released by the heat storage device 35 into mechanical energy. The steam turbine 32 ultimately transfers the heat released by the heat storage device 35 to the generator 33, which converts it into electrical energy and transmits it to the power grid 70. Furthermore, the heat storage device 35 can store electrical energy during periods of low grid prices for the renewable power generation unit 10 and the power grid 70, and convert it back into electrical energy when user demand is high (high electricity prices).

[0054] In some embodiments of the present disclosure, the carbon capture device 40 includes: a carbon capture container 41, a CCUS device 42 and a DAC device 43. Specifically, the carbon capture container 41 is connected to the exhaust port of the boiler 31 of the thermal power unit 30, and the carbon capture container 41 is used to accommodate the flue gas discharged by the thermal power unit 30. The CCUS device 42 is communicated with the carbon capture container 41, and the CCUS device 42 is used to capture the carbon dioxide in the carbon capture container 41. The DAC device 43 is arranged outside the carbon capture container 41, and the DAC device 43 is arranged close to the exhaust port of the carbon capture container 41. The DAC device 43 is used to capture the carbon dioxide discharged into the air from the carbon capture container 41. The exhaust port of the boiler 31 of the thermal power unit 30 discharges the flue gas generated by combustion. The flue gas enters a carbon capture vessel 41. A CCUS device 42, connected to the carbon capture vessel 41, captures carbon dioxide from the flue gas to reduce the carbon dioxide content in the flue gas from the carbon capture vessel 41. The flue gas from the carbon capture vessel 41 is discharged into the air through the exhaust port of the carbon capture vessel 41. A DAC device 43, located near the exhaust port of the carbon capture vessel 41, captures the carbon dioxide discharged into the air from the carbon capture vessel 41 to reduce the carbon dioxide content in the flue gas discharged from the carbon capture vessel 41. The CCUS device 42 performs the initial capture of carbon dioxide from the flue gas discharged from the thermal power unit 30. Most of the carbon dioxide in the flue gas is captured by the CCUS device 42 and then discharged from the carbon capture vessel 41 and discharged into the air through the exhaust port of the carbon capture vessel 41. Then, the DAC device 43 is used to capture the carbon dioxide in the air near the exhaust port of the carbon capture container 41 for a second time, so that the amount of carbon dioxide captured by the CCUS device 42 and the DAC device 43 of the carbon capture device 40 is equal to the amount of carbon dioxide generated by the combustion of fossil fuels, thereby balancing the amount of carbon dioxide captured by the integrated power generation system and the amount of carbon dioxide generated, thereby achieving zero carbon dioxide emissions from the integrated power generation system.

[0055] In some embodiments of the present disclosure, carbon capture device 40 further includes a carbon dioxide storage device 44, which is connected to CCUS device 42, which is in turn connected to DAC device 43. CCUS device 42 stores captured carbon dioxide in carbon dioxide storage device 44, while DAC device 43 stores captured carbon dioxide in carbon dioxide storage device 44. The carbon dioxide stored in carbon dioxide storage device 44 can be used to synthesize chemical raw materials or products such as methanol, formic acid, and urea, thereby improving the efficient utilization of resources.

[0056] In some embodiments of the present disclosure, a renewable power generator set 10 is connected to a CCUS device 42 to provide electrical energy to the CCUS device 42. Providing electrical energy to the CCUS device 42 through the renewable power generator set 10 achieves zero carbon emissions for the equipment powered by the CCUS device 42. The renewable power generator set 10 is connected to a DAC device 43 to provide electrical energy to the DAC device 43. Providing electrical energy to the DAC device 43 through the renewable power generator set 10 achieves zero carbon emissions for the equipment powered by the CCUS device 42, thereby ensuring zero carbon emissions for the zero-carbon power generation system.

[0057] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A comprehensive power generation system that achieves zero carbon emissions, characterized in that: include: A renewable power generation unit configured to generate electricity using renewable energy; A green fuel preparation device, the renewable generator set is connected to the green fuel preparation device, the renewable generator set is used to supply electricity to the green fuel preparation device, and the green fuel preparation device is used to prepare green fuel, and the green fuel does not contain carbon elements; A thermal power generation unit, the green fuel preparation device being connected to the thermal power generation unit, the thermal power generation unit being used to generate electricity using green fuel and fossil fuel; a carbon capture device connected to the thermal power unit, comprising a CCUS device and a DAC device, wherein the CCUS device is used to capture carbon dioxide from flue gas exhausted by the thermal power unit, and the DAC device is used to capture carbon dioxide from the air, wherein the total amount of carbon dioxide captured by the CCUS device and the DAC device is equal to the amount of carbon dioxide generated by the combustion of fossil fuels by the thermal power unit; The carbon capture device includes: a carbon capture container, which is connected to the exhaust port of the thermal power unit and is used to accommodate the flue gas discharged by the thermal power unit. The CCUS device is in communication with the carbon capture container, and the DAC device is arranged outside the carbon capture container and is close to the exhaust port of the carbon capture container.

2. The integrated power generation system for achieving zero carbon emissions according to claim 1, characterized in that: The green fuel preparation device is at least one of a hydrogen production device and an ammonia production device.

3. The integrated power generation system for achieving zero carbon emissions according to claim 1, characterized in that: The integrated power generation system for achieving zero carbon emissions further comprises: A biomass supply device is connected to the thermal power unit and is used to supply biomass fuel to the thermal power unit.

4. The integrated power generation system for achieving zero carbon emissions according to claim 3, characterized in that: The integrated power generation system for achieving zero carbon emissions further comprises: A zero-carbon fuel storage device is connected to the green fuel preparation device, the zero-carbon fuel storage device is connected to the biomass supply device, the zero-carbon fuel storage device is connected to the thermal power unit, and the zero-carbon fuel storage device is used to supply biomass fuel and green fuel to the thermal power unit.

5. The integrated power generation system for achieving zero carbon emissions according to claim 1, characterized in that: The carbon capture device further includes a carbon dioxide storage device, which is connected to the CCUS device, and the carbon dioxide storage device is connected to the DAC device.

6. The integrated power generation system for achieving zero carbon emissions according to claim 1, characterized in that: The renewable power generation set is connected to the CCUS device, and the renewable power generation set is connected to the DAC device. The renewable power generation set is used to provide electrical energy to the CCUS device and the DAC device.

7. The integrated power generation system for achieving zero carbon emissions according to claim 1, characterized in that: The thermal power unit comprises: A boiler, wherein the fuel inlet of the boiler is connected to the green fuel preparation device, and the exhaust port of the boiler is connected to the carbon capture device; a steam turbine, the boiler being connected to the steam turbine; A generator, the steam turbine and the generator, and the generator are connected to a power grid.

8. The integrated power generation system for achieving zero carbon emissions according to claim 7, characterized in that: The thermal power unit further comprises: a heat storage device connected to at least one of the power grid, the renewable power generation set, and the generator, the heat storage device being connected to the steam turbine, and the heat storage device being used to store electrical energy from at least one of the power grid, the renewable power generation set, and the generator in the form of thermal energy.

9. The integrated power generation system for achieving zero carbon emissions according to claim 7, characterized in that: The thermal power unit further comprises: A fossil fuel supply device is connected to the boiler and is used to supply fossil fuel to the boiler.

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