Biomass carbon capture carbon dioxide energy storage system

Abstract

The invention provides a biomass carbon capture carbon dioxide energy storage system, and relates to the technical field of energy storage systems, the biomass carbon capture carbon dioxide energy storage system comprises a carbon dioxide compression system and a carbon dioxide pressure release system, the inlet end of the carbon dioxide compression system and the outlet end of the carbon dioxide pressure release system are connected with a low-pressure carbon dioxide storage module; the outlet end of the carbon dioxide compression system and the inlet end of the carbon dioxide pressure release system are connected with a liquid carbon dioxide storage module; electric energy can be converted through gas-state and liquid-state conversion of carbon dioxide, carbon dioxide is used as a working medium, and surplus electric energy of wind power generation and solar power generation can be stored; during peak power consumption, electric energy is released and connected to a grid through a carbon dioxide working medium, peak clipping and valley leveling are achieved, and stable operation of a power grid is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to a biomass carbon capture carbon dioxide energy storage system. Background Art

[0002] my country has rich agricultural biomass resources, with the amount of resources that can be converted into energy being about 350 million tons of standard coal. Vigorously developing and recycling biomass energy, such as biogas, is a powerful measure to increase my country's natural gas resources and help achieve carbon peak and carbon neutrality.

[0003] The main components of renewable biogas are methane and carbon dioxide. At present, the existing technology for biogas purification and utilization is very mature, which can purify biogas into biomethane products that meet the requirements. However, most of the separated green carbon dioxide is directly discharged, and a small part of the separated green carbon dioxide is used as raw material gas to further purify and liquefy it into liquid carbon dioxide products.

[0004] As renewable energy sources, wind and solar energy will play an important role in the future energy system. Wind and solar power generation have the characteristics of green and renewable, but they have the characteristics of discontinuity and instability, which have an adverse impact on the direct large-scale grid connection of electricity. Therefore, energy storage technology can be used to achieve continuous, stable and controllable wind and solar power generation. The existing energy storage technologies mainly include pumped storage and compressed air energy storage, but the requirements of both on the energy storage location are relatively stringent, resulting in certain restrictions on future development. At the same time, the response time of compressed air energy storage is long and the economic benefits are low, which further restricts its development and application. In recent years, carbon dioxide energy storage technology with simple system, high energy density, compact equipment and good economy has received great attention at home and abroad. Moreover, carbon dioxide energy storage technology can effectively utilize the large amount of carbon dioxide captured by carbon capture technology, which is a powerful measure to quickly achieve carbon peak and carbon neutrality. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a biomass carbon capture carbon dioxide energy storage system to solve the problem of low economic effect of electric energy storage.

[0006] Based on the technical problems existing in the background technology, the present invention proposes a biomass carbon capture carbon dioxide energy storage system, including a carbon dioxide compression system and a carbon dioxide decompression system, wherein the inlet end of the carbon dioxide compression system and the outlet end of the carbon dioxide decompression system are connected to a low-pressure carbon dioxide storage module, and the outlet end of the carbon dioxide compression system and the inlet end of the carbon dioxide decompression system are connected to a liquid carbon dioxide storage module.

[0007] Preferably, the carbon dioxide compression system includes a carbon dioxide compression module, a carbon dioxide liquefaction module, the outlet end of the carbon dioxide compression module is connected to the inlet end of the carbon dioxide liquefaction module, the inlet end of the carbon dioxide compression module is connected to the outlet end of the low-pressure carbon dioxide storage module, and the outlet end of the carbon dioxide liquefaction module is connected to the inlet end of the liquid carbon dioxide storage module.

[0008] Preferably, the carbon dioxide depressurization system includes a pressurized gasification module and an expander module, the inlet end of the pressurized gasification module is connected to the outlet end of the liquid carbon dioxide storage module, the outlet end of the pressurized gasification module is connected to the inlet end of the expander module, and the outlet end of the expander module is connected to the inlet end of the low-pressure carbon dioxide storage module.

[0009] Preferably, a heat exchange system is provided between the carbon dioxide compression system and the carbon dioxide decompression system.

[0010] Preferably, the heat exchange system includes a cooling heat exchange module and a heating heat exchange module, the cooling heat exchange module is respectively connected to the carbon dioxide compression module, the carbon dioxide liquefaction module, the pressurized gasification module, and the expander module, and the heating heat exchange module is respectively connected to the carbon dioxide compression module, the carbon dioxide liquefaction module, the pressurized gasification module, and the expander module.

[0011] Preferably, the carbon dioxide compression module is powered by wind power generation and solar power generation, and the expander module can generate electricity.

[0012] Preferably, the inlet end of the liquid carbon dioxide storage module is connected to a biomass carbon capture module.

[0013] Preferably, the low-pressure carbon dioxide storage module delivers low-pressure gaseous carbon dioxide to the carbon dioxide compression module, the carbon dioxide compression module delivers medium-pressure gaseous carbon dioxide to the carbon dioxide liquefaction module, and the carbon dioxide liquefaction module delivers liquid carbon dioxide to the liquid carbon dioxide storage module.

[0014] Preferably, the liquid carbon dioxide storage module delivers liquid carbon dioxide to the pressurized gasification module, the pressurized gasification module delivers high-pressure carbon dioxide to the expander module, and the expander module delivers pressurized gaseous carbon dioxide to the low-pressure carbon dioxide storage module.

[0015] Compared with the prior art, the biomass carbon capture carbon dioxide energy storage system proposed in the present invention adopts the above technical solution and achieves the following technical effects:

[0016] The present invention can convert electric energy by converting the gaseous and liquid states of carbon dioxide. The present application uses carbon dioxide as a working fluid and can store surplus electric energy from wind power generation and solar power generation. During peak power consumption, the electric energy is released and connected to the grid through the carbon dioxide working fluid, thereby shaving peaks and flattening valleys, and ensuring the smooth operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a system connection diagram of the present invention.

[0018] In the figure: 100, carbon dioxide compression system; 200, carbon dioxide depressurization system; 11, low-pressure carbon dioxide storage module; 14, liquid carbon dioxide storage module; 12, carbon dioxide compression module; 13, carbon dioxide liquefaction module; 15, pressurized gasification module; 16, expander module; 300, heat exchange system; 301, cooling heat exchange module; 302, heating heat exchange module; 16, expander module; 31, biomass carbon capture module; 21, cooling module; 22, cold storage module; 23, heating module; 24, heat storage module. DETAILED DESCRIPTION

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Example

[0022] Please refer to Figure 1The present invention proposes a biomass carbon capture carbon dioxide energy storage system, including a carbon dioxide compression system 100 and a carbon dioxide decompression system 200. The inlet end of the carbon dioxide compression system 100 and the outlet end of the carbon dioxide decompression system 200 are connected to a low-pressure carbon dioxide storage module 11, and the outlet end of the carbon dioxide compression system 100 and the inlet end of the carbon dioxide decompression system 200 are connected to a liquid carbon dioxide storage module 14. In this solution, the carbon dioxide compression system 100 and the carbon dioxide decompression system 200 use carbon dioxide as a medium to increase the pressure of carbon dioxide by converting electrical energy from solar energy and wind energy, so that the energy is stored in the form of pressure. When it needs to be released, the pressure of carbon dioxide is released and converted into electrical energy, thereby realizing indirect energy conversion.

[0023] In a specific embodiment, refer to Figure 1 The carbon dioxide compression system 100 includes a carbon dioxide compression module 12, a carbon dioxide liquefaction module 13, the outlet end of the carbon dioxide compression module 12 is connected to the inlet end of the carbon dioxide liquefaction module 13, the inlet end of the carbon dioxide compression module 12 is connected to the outlet end of the low-pressure carbon dioxide storage module 11, and the outlet end of the carbon dioxide liquefaction module 13 is connected to the inlet end of the liquid carbon dioxide storage module 14; in this solution, the carbon dioxide compression module 12 is used to convert electrical energy, and the electrical energy of the carbon dioxide compression module 12 is provided by solar energy, that is, wind energy. The carbon dioxide compression module 12 can convert the electricity generated by solar energy and wind energy into the pressure of carbon dioxide after compression. After continuing to compress and cool down, the energy stored in the carbon dioxide continues to increase, and can be converted into liquid carbon dioxide and stored in the liquid carbon dioxide storage module 14 to preserve the energy.

[0024] In a specific embodiment, refer to Figure 1 The carbon dioxide depressurization system 200 includes a pressurized gasification module 15 and an expansion machine module 1616. The inlet end of the pressurized gasification module 15 is connected to the outlet end of the liquid carbon dioxide storage module 14, and the outlet end of the pressurized gasification module 15 is connected to the inlet end of the expansion machine module 1616. The outlet end of the expansion machine module 1616 is connected to the inlet end of the low-pressure carbon dioxide storage module 11. In this solution, the carbon dioxide depressurization module can release the pressure of the high-pressure liquid carbon dioxide, which needs to absorb heat and is converted into high-pressure gaseous carbon dioxide through the pressurized release module. The pressurized gasification module 15 can accelerate the decomposition of liquid carbon dioxide and convert it into gaseous carbon dioxide. The high-pressure gaseous carbon dioxide is converted into electrical energy after passing through the expansion agent module, and the carbon dioxide is converted into low-pressure carbon dioxide. The carbon dioxide enters the low-pressure carbon dioxide storage module 11 to prepare for energy storage for the next solar energy and wind energy conversion electrical energy.

[0025] In a specific embodiment, refer to Figure 1, characterized in that a heat exchange system 300 is provided between the carbon dioxide compression system 100 and the carbon dioxide depressurization system 200; in this solution, the heat exchange system 300 is used to adjust the heat during the compression and release of carbon dioxide. When carbon dioxide is compressed, a large amount of heat energy is released and cooling is required at the same time. When carbon dioxide is released, a large amount of heat is required and cooling is generated at the same time. The time of the two can be converted through the heat exchange system 300 to save energy.

[0026] In a specific embodiment, refer to Figure 1 The heat exchange system 300 includes a cooling heat exchange module 301 and a heating heat exchange module 302. The cooling heat exchange module 301 is respectively connected to the carbon dioxide compression module 12, the carbon dioxide liquefaction module 13, the pressurized gasification module 15, and the expander module 1616, and the heating heat exchange module 302 is respectively connected to the carbon dioxide compression module 12, the carbon dioxide liquefaction module 13, the pressurized gasification module 15, and the expander module 1616; in this solution, the cooling heat exchange module 301 includes a cooling module 21 and a cold storage module 22, wherein the cooling module 21 is used to absorb the cooling units generated in the carbon dioxide depressurization system 200, and input the cooling units into the carbon dioxide pressurization system for use, and the excess cooling units will be stored in the cold storage module 22; in this solution, the heating heat exchange module 302 includes a heating module 23 and a heat storage module 24, wherein the heating module 23 is used to absorb the heat units generated in the carbon dioxide pressurization system, and input the heat units into the carbon dioxide depressurization system 200 for use, and the excess heat units will be stored in the heat storage module 24.

[0027] In a specific embodiment, refer to Figure 1 The carbon dioxide compression module 12 is powered by wind power and solar power, and the expander module 1616 can generate electricity.

[0028] In a specific embodiment, refer to Figure 1 The inlet end of the liquid carbon dioxide storage module 14 is connected to a biomass carbon capture module 31; in this solution, the biomass carbon capture module 31 can be used to capture carbon dioxide in the air or collected carbon dioxide, fill the carbon dioxide into the system, and increase the energy storage medium by increasing the amount of carbon dioxide.

[0029] In a specific embodiment, refer to Figure 1 The low-pressure carbon dioxide storage module 11 delivers low-pressure gaseous carbon dioxide to the carbon dioxide compression module 12, the carbon dioxide compression module 12 delivers medium-pressure gaseous carbon dioxide to the carbon dioxide liquefaction module 13, and the carbon dioxide liquefaction module 13 delivers liquid carbon dioxide to the liquid carbon dioxide storage module 14; in this solution, the principle of carbon dioxide energy storage is to increase the pressure of carbon dioxide for energy storage, and the energy is released by reducing the pressure of liquid carbon dioxide.

[0030] In a specific embodiment, refer to Figure 1 The liquid carbon dioxide storage module 14 delivers liquid carbon dioxide to the pressurized gasification module 15 , the pressurized gasification module 15 delivers high-pressure carbon dioxide to the expander module 1616 , and the expander module 1616 delivers pressurized gaseous carbon dioxide to the low-pressure carbon dioxide storage module 11 .

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A biomass carbon capture carbon dioxide energy storage system, characterized in that: The invention comprises a carbon dioxide compression system (100) and a carbon dioxide decompression system (200), wherein the inlet end of the carbon dioxide compression system (100) and the outlet end of the carbon dioxide decompression system (200) are connected to a low-pressure carbon dioxide storage module (11), and the outlet end of the carbon dioxide compression system (100) and the inlet end of the carbon dioxide decompression system (200) are connected to a liquid carbon dioxide storage module (14).

2. The biomass carbon capture carbon dioxide energy storage system according to claim 1, characterized in that: The carbon dioxide compression system (100) comprises a carbon dioxide compression module (12), a carbon dioxide liquefaction module (13), the outlet end of the carbon dioxide compression module (12) is connected to the inlet end of the carbon dioxide liquefaction module (13), the inlet end of the carbon dioxide compression module (12) is connected to the outlet end of the low-pressure carbon dioxide storage module (11), and the outlet end of the carbon dioxide liquefaction module (13) is connected to the inlet end of the liquid carbon dioxide storage module (14).

3. The biomass carbon capture carbon dioxide energy storage system according to claim 2, characterized in that: The carbon dioxide depressurization system (200) comprises a pressurized gasification module (15) and an expansion machine module (16); the inlet end of the pressurized gasification module (15) is connected to the outlet end of the liquid carbon dioxide storage module (14); the outlet end of the pressurized gasification module (15) is connected to the inlet end of the expansion machine module (16); and the outlet end of the expansion machine module (16) is connected to the inlet end of the low-pressure carbon dioxide storage module (11).

4. The biomass carbon capture carbon dioxide energy storage system according to claim 3, characterized in that: A heat exchange system (300) is provided between the carbon dioxide compression system (100) and the carbon dioxide decompression system (200).

5. The biomass carbon capture carbon dioxide energy storage system according to claim 4, characterized in that: The heat exchange system (300) comprises a cooling heat exchange module (301) and a heating heat exchange module (302). The cooling heat exchange module (301) is respectively connected to a carbon dioxide compression module (12), a carbon dioxide liquefaction module (13), a pressurized gasification module (15), and an expander module (16). The heating heat exchange module (302) is respectively connected to a carbon dioxide compression module (12), a carbon dioxide liquefaction module (13), a pressurized gasification module (15), and an expander module (16).

6. The biomass carbon capture carbon dioxide energy storage system according to claim 3, characterized in that: The carbon dioxide compression module (12) is powered by wind power and solar power, and the expander module (16) can generate electricity.

7. The biomass carbon capture carbon dioxide energy storage system according to claim 1, characterized in that: The inlet end of the liquid carbon dioxide storage module (14) is connected to a biomass carbon capture module (31).

8. The biomass carbon capture carbon dioxide energy storage system according to claim 2, characterized in that: The low-pressure carbon dioxide storage module (11) delivers low-pressure gaseous carbon dioxide to the carbon dioxide compression module (12), the carbon dioxide compression module (12) delivers medium-pressure gaseous carbon dioxide to the carbon dioxide liquefaction module (13), and the carbon dioxide liquefaction module (13) delivers liquid carbon dioxide to the liquid carbon dioxide storage module (14).

9. The biomass carbon capture carbon dioxide energy storage system according to claim 3, characterized in that: The liquid carbon dioxide storage module (14) delivers liquid carbon dioxide to the pressurized gasification module (15), the pressurized gasification module (15) delivers high-pressure carbon dioxide to the expansion module (16), and the expansion module (16) delivers pressurized gaseous carbon dioxide to the low-pressure carbon dioxide storage module (11).

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