CN114673571B - Coupling system for carbon capture and utilization, sealing and supercritical carbon dioxide energy storage technology - Google Patents
Coupling system for carbon capture and utilization, sealing and supercritical carbon dioxide energy storage technology Download PDFInfo
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- CN114673571B CN114673571B CN202210375585.XA CN202210375585A CN114673571B CN 114673571 B CN114673571 B CN 114673571B CN 202210375585 A CN202210375585 A CN 202210375585A CN 114673571 B CN114673571 B CN 114673571B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/12—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having two or more accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
Abstract
The invention provides a coupling system of Carbon Capture and Utilization and Sealing (CCUS) and supercritical carbon dioxide energy storage technology, wherein an expansion energy release section, a compression energy storage section and a cold storage and heat storage section are added in the CCUS process. CCUS includes processes such as carbon capture, carbon utilization, and carbon sequestration; the expansion energy release section comprises an expander, a heat exchanger and a generator, and carbon dioxide after energy release is stored in a storage tank; the compression energy storage section comprises a motor, a compressor and a heat exchanger, and energy is stored in high-pressure supercritical carbon dioxide and is transported and stored in a salt cavern, a depleted oil and gas reservoir and other spaces; the cold storage and heat accumulation section comprises a cold accumulator and a heat accumulator, and is connected with a heat exchanger in the system to respectively store cold energy and heat energy generated by the system. The coupling system fully utilizes carbon dioxide, does not cause redundant carbon emission, and provides good technical support for carbon neutralization; the coupling system also enriches the energy configuration of the power system, and can be used as a large-scale long-time energy storage technology to realize power grid load adjustment, peak clipping and valley filling.
Description
Technical Field
The invention belongs to the fields of Carbon Capture Utilization and Sealing (CCUS), supercritical carbon dioxide energy storage and the like, and particularly relates to a coupling system of carbon capture utilization and sealing and supercritical carbon dioxide energy storage technologies, which is a comprehensive system capable of realizing flexible regulation and energy optimization configuration of an electric power system.
Background
The sustainable development of energy and environmental problems is an important means for constructing green ecological civilization, and under the aim of carbon neutralization, the CCUS technology is greatly developed, provides a guarantee for realizing a zero-carbon energy system, is taken as an important component for realizing the combination of carbon neutralization target technologies in China, and is continuously enriched and expanded in connotation and extension. The CCUS is an important technical path for realizing low carbonization utilization of fossil energy at present, and carbon capture, utilization and sealing are added in fossil fuel power plants and industrial processes, so that carbon recovery can be effectively improved, and carbon emission is reduced.
The geological sequestration of carbon dioxide is generally carried out by injecting supercritical carbon dioxide into deep geological structures, and common geological structures suitable for sequestration include oil reservoirs, gas reservoirs, salty water layers, non-mineable coal mines and the like. Therefore, the CCUS project is mostly concentrated near the fossil fuel industry cluster to facilitate transportation and sequestration of supercritical carbon dioxide, while providing advantages for recycling of carbon dioxide.
The supercritical carbon dioxide has higher available energy, and when the temperature exceeds the supercritical temperature and the critical pressure, the carbon dioxide is in a critical state, has the characteristics of low viscosity and high density, has extremely high compression energy, and can push the expander to generate electricity so as to realize the utilization of the supercritical carbon dioxide. The supercritical carbon dioxide energy storage system does not generate impurity gas in the process and does not influence the sealing and transportation of carbon dioxide. The supercritical carbon dioxide energy storage power generation technology can provide continuous and stable power output, and provides technical support for flexibly regulating and controlling a power system, fully excavating peak regulation potential of a matched power supply and optimally configuring energy sources.
The coupling of the CCUS and the carbon dioxide energy storage technology can further improve the carbon utilization, ensure the flexibility of the power system, provide wide space for energy optimal configuration and realize the effective utilization of resources.
Disclosure of Invention
In order to optimize and integrate energy configuration and improve flexible regulation and control of an electric power system of a fossil fuel power plant, the invention provides a coupling system for CCUS and supercritical carbon dioxide energy storage power generation, which can store energy in a large scale for a long time, continuously and effectively output power and effectively improve energy configuration and utilization. In the CCUS link, carbon dioxide is used as an energy storage cycle working medium, so that the circulation and utilization of the carbon dioxide are increased.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a coupling system for carbon capture, utilization, sealing and supercritical carbon dioxide energy storage technology comprises a primary expander E1, a secondary expander E2, a primary compressor C1, a secondary compressor C2, a high-pressure supercritical carbon dioxide storage tank, a low-pressure supercritical carbon dioxide storage tank, a generator, a liquid carbon dioxide storage tank, a carbon dioxide capture device, a motor, a carbon dioxide sealing end and a carbon dioxide utilization end;
the primary expander E1, the low-pressure supercritical carbon dioxide storage tank, the secondary expander E2, the liquid carbon dioxide storage tank, the primary compressor C1, the secondary compressor C2, the high-pressure supercritical carbon dioxide storage tank and the carbon dioxide sealing end are sequentially connected in series through pipelines;
the primary expander E1 is connected to the secondary expander E2 in a pipeline manner;
the primary expander E1 and the secondary expander E2 are connected to the generator through a common pipeline;
the low-pressure supercritical carbon dioxide storage tank and the liquid carbon dioxide storage tank are respectively connected to the carbon dioxide utilization end through pipelines;
the primary compressor C1 and the secondary compressor C2 are connected to the motor through a common pipeline;
the carbon dioxide capturing device is connected to the secondary compressor C2 through a pipeline;
the high-pressure supercritical carbon dioxide storage tank is connected to the primary expander E1 through a pipeline.
As a further preferable scheme, the high-pressure supercritical carbon dioxide storage tank and the carbon dioxide sealing end are respectively connected to the primary expander E1 through a heat exchanger T1 for heating; the secondary expander E2 is connected to the liquid carbon dioxide storage tank through a heat exchanger T2 for cooling; the liquid carbon dioxide storage tank is connected to the primary compressor C1 through a heat exchanger T3 for heating; the primary compressor C1 is connected to the secondary compressor C2 through a heat exchanger T4 for cooling; the secondary compressor C2 is connected to the high pressure supercritical carbon dioxide storage tank through a heat exchanger T5 for cooling down.
As a further preferable scheme, the heat exchanger T1, the heat exchanger T2, the heat exchanger T3, the heat exchanger T4 and the heat exchanger T5 are all connected with the regenerator H2 and the regenerator H1.
As a still further preferred embodiment, the primary compressor C1 is piped to a low pressure supercritical carbon dioxide storage tank that is piped to the secondary compressor C2.
As a further preferred embodiment, the carbon dioxide sequestration end comprises ocean sequestration and geological sequestration.
The invention has the beneficial effects that:
carbon utilization and carbon dioxide stored in geological layers (shale, coal seam, oil reservoir, natural gas reservoir, salty water layer and the like) in sealing have great reserves, are natural containers, can store energy for a long time, can provide continuous and stable carbon dioxide input for an expander in the electricity utilization peak period, and accordingly continuous and stable output of electric power is achieved. The carbon dioxide after doing work can be stored in the low-pressure supercritical carbon dioxide storage tank 2 and the liquid carbon dioxide storage tank 4, can be used for chemical and biological utilization of the carbon dioxide, or can be recycled to participate in the energy storage system. In the low valley period of the electric load, redundant electric energy is utilized to drive a compressor, carbon dioxide is compressed into a high-pressure supercritical state and stored in the high-pressure supercritical carbon dioxide storage tank 1, salt caves and depleted oil and gas reservoirs, and energy storage is achieved.
Under the scene of generating more carbon dioxide of fossil fuel power plants and the like, the energy cluster advantage of the CCUS system is fully exerted by adopting a method of coupling the CCUS and an energy storage technology. In the link of the CCUS, an energy storage and release link of supercritical carbon dioxide is added, and a compressor and an expander are used as an independent compression system and an independent power generation system, so that convenience is provided for peak shaving of an electric power system. The coupling system fully utilizes the captured carbon dioxide, the purity of the carbon dioxide is not affected in the process, excessive carbon emission is not caused, good technical support is provided for carbon neutralization, the coupling system can enrich the energy configuration of the power system, promote the integration of the power grid charge storage, have flexible power regulation function, realize the mutual complementation of energy, and can be used as a large-scale long-term energy storage technology to realize power grid load regulation and peak clipping and valley filling.
The critical temperature of the carbon dioxide is 304.2K, the critical pressure is 7.28MPa, the state parameter is low, and the supercritical state is easy to realize. Because of small viscosity, large density and large diffusion coefficient of the supercritical fluid, the supercritical fluid has good fluidity and transmissibility and has great advantages in transportation. The supercritical carbon dioxide is used as working medium, so that the structural size of the turbine machinery and the heat exchanger in the system can be reduced, the maintenance cost is reduced, and the realization of higher thermoelectric conversion efficiency is facilitated. The coupling system adopts the cold accumulator H1 and the heat accumulator H2 to store heat energy and cold energy generated in the process and release the heat energy and the cold energy when needed, so that the energy utilization efficiency can be further improved.
Drawings
FIG. 1 is a schematic diagram of a coupling system for a CCUS and carbon dioxide energy storage technology;
the serial numbers in the figures illustrate:
1, a high-pressure supercritical carbon dioxide storage tank; 2, a low-pressure supercritical carbon dioxide storage tank; 3, a generator; 4, a liquid carbon dioxide storage tank; 5, a carbon dioxide capturing device; 6, a motor; 7: a carbon dioxide sealing end; 8: a carbon dioxide utilization end; c1: a first stage compressor; c2, a secondary compressor; e1, a primary expander; e2, a secondary expander; h1, a cold accumulator; h2: a heat accumulator; T1-T5, a heat exchanger; V1-V6, one-way valve.
Detailed Description
The invention is described in further detail below with reference to examples.
FIG. 1 is a schematic diagram of a coupling system of the CCUS and carbon dioxide energy storage technology of the present invention.
A coupling system for carbon capture utilization, sealing and supercritical carbon dioxide energy storage technology comprises a primary expander E1, a secondary expander E2, a heat exchanger, a generator 3, a primary compressor C1, a secondary compressor C2, a motor 6, a high-pressure supercritical carbon dioxide storage tank 1, a low-pressure supercritical carbon dioxide storage tank 2, a liquid carbon dioxide storage tank 4, a regenerator H1, a regenerator H2, a one-way valve, a carbon capture device, carbon utilization, carbon sealing and storage and the like, and carbon dioxide is taken as a carrier, and the carbon capture utilization, sealing and energy storage technology are combined to form a comprehensive system capable of realizing flexible adjustment and energy optimization configuration of an electric power system.
In the expander, a high-pressure supercritical carbon dioxide storage tank 1, a salt cavern and carbon dioxide sealed in a depleted oil and gas reservoir are connected with an inlet of a first-stage expander E1 through a heat exchanger, and an outlet of the first-stage expander E1 is connected with a low-pressure supercritical carbon dioxide storage tank 2; the inlet of the secondary expander E2 is connected with the low-pressure supercritical carbon dioxide storage tank 2, and the outlet is connected with the liquid carbon dioxide storage tank 4 through a heat exchanger; the outlet of the primary expander E1 is connected with the inlet of the secondary expander E2; the primary expander E1 and the secondary expander E2 are both connected with the generator 3, the inlet of the primary expander E1 is connected with a salt cavern and a depleted oil-gas reservoir through a heat exchanger, and is also connected with the high-pressure supercritical carbon dioxide storage tank 1, and the outlet of the primary expander E1 is connected with the low-pressure supercritical carbon dioxide storage tank 2; the inlet of the secondary expander E2 is connected with the low-pressure supercritical carbon dioxide storage tank 2, and the outlet is connected with the liquid carbon dioxide storage tank 4 through a heat exchanger to perform working medium expansion work so as to drive the power generator 3 to output power.
The primary compressor C1 and the secondary compressor C2 are both connected with the motor 6, a heat exchanger is arranged behind the compressors to cool working media at the outlet of the compressors, and the inlet of the primary compressor C1 is connected with the carbon trapping device and also connected with the liquid carbon dioxide storage tank 4 through the heat exchanger; the outlet of the primary compressor C1 and the inlet of the secondary compressor C2 are respectively connected with a low-pressure supercritical carbon dioxide storage tank 2; the outlet of the secondary compressor C2 is connected with the high-pressure supercritical carbon dioxide storage tank 1 after passing through the heat exchanger.
In the carbon utilization and carbon sequestration, the carbon dioxide in the high-pressure supercritical carbon dioxide storage tank 1 can be used for geological utilization, ocean sequestration, salt cavern and depleted hydrocarbon reservoirs sequestration, and when the oil/gas reservoirs adopting geological utilization are mined, the depleted hydrocarbon reservoirs evolved into depleted hydrocarbon reservoirs can be further used for storing carbon dioxide; the carbon dioxide in the low-pressure supercritical carbon dioxide storage tank 2 and the liquid carbon dioxide storage tank 4 can be used for chemical and biological utilization.
The carbon dioxide geological utilization, ocean sealing, geological sealing (salt cavern, depleted oil and gas reservoir and the like) and the like are respectively connected with the high-pressure supercritical carbon dioxide storage tank 1, and the carbon dioxide chemical utilization and the biological utilization are respectively connected with the low-pressure supercritical carbon dioxide storage tank 2 and the liquid carbon dioxide storage tank 4.
The salt cavern for sealing and storing carbon dioxide and the depleted oil and gas reservoir are used as natural large-capacity storage containers, are connected with an energy release system, can store energy for a long time and provide continuous and stable power output.
The carbon dioxide in the storage tank can be involved in the process of carbon utilization and sealing, and can also be involved in the processes of compression energy storage and expansion energy release.
When the high-pressure supercritical carbon dioxide storage tank 1, the low-pressure supercritical carbon dioxide storage tank 2 and the liquid carbon dioxide storage tank 4 are connected with other devices or systems, the check valves V1-V6 are needed to be used as device description only and the number and the interfaces of the devices are not limited.
The cold accumulator H1 and the heat accumulator H2 are connected with a heat exchanger, an inlet of the heat exchanger for precooling carbon dioxide is connected with the cold accumulator H1, and an outlet of the heat exchanger for precooling carbon dioxide is connected with the heat accumulator H2; the inlet of the heat exchanger for heating the carbon dioxide is connected with the heat accumulator H2, and the outlet is connected with the cold accumulator H1. When the high-temperature carbon dioxide is precooled through the heat exchanger, heat can be stored in the heat accumulator H2; the heat in the heat accumulator H2 can be used for heating the carbon dioxide in front of the expander, improving the working capacity of the carbon dioxide, and storing cold energy in the cold accumulator H1, so that the heat is stored and efficiently utilized.
The carbon trapping process is continuously carried out, when electricity consumption is high, supercritical carbon dioxide obtained after the carbon dioxide is compressed by the primary compressor C1 can be directly stored in the low-pressure storage tank without passing through the secondary compressor C2, and when electricity consumption is low, the supercritical carbon dioxide stored in the low-pressure storage tank is sent into the secondary compressor C2 for compression energy storage, so that more space is provided for electric power peak regulation.
When electricity consumption peaks, after carbon dioxide sealed in salt caves and exhausted oil and gas reservoirs is heated by a heat exchanger T1 (the pressure is 30MPa and the temperature is 450K), the primary expander E1 is operated to drive the generator 3 to continuously and stably output electric power, and the expanded carbon dioxide (the pressure is 10MPa and the temperature is 350K) is stored in the low-pressure supercritical carbon dioxide storage tank 2 through a one-way valve (the pressure in the tank is more than or equal to 8MPa and the temperature is more than or equal to 310K). The high-pressure supercritical carbon dioxide storage tank 1 (the pressure in the tank is more than or equal to 30MPa and the temperature is more than or equal to 350K) can supplement supercritical carbon dioxide for the energy release process through a one-way valve.
The carbon dioxide expanded by the primary expander E1 and the carbon dioxide in the low-pressure supercritical carbon dioxide storage tank 2 can further do work by the secondary expander E2 to drive the generator 3 to output electric energy, and the carbon dioxide (the pressure is 3MPa and the temperature is 273K) after doing work is cooled and liquefied by the heat exchanger T2 and then stored in the liquid carbon dioxide storage tank 4 (the pressure in the tank is more than or equal to 3MPa and the temperature is less than or equal to 268K).
The carbon dioxide in the low-pressure supercritical carbon dioxide storage tank 2 and the liquid carbon dioxide storage tank 4 can be utilized in the fields of chemical industry, biology and the like.
Carbon dioxide in the low-pressure supercritical carbon dioxide storage tank 2 can enter the secondary compressor C2 through the one-way valve V2 for compression; the carbon dioxide in the liquid carbon dioxide storage tank 4 is heated by the heat exchanger T3 and then becomes gaseous, and is compressed by the first-stage compressor C1.
In the carbon trapping process, after the carbon dioxide is compressed and dehydrated (the pressure is 4MPa and the normal temperature), the motor 6 drives the primary compressor C1 to compress the carbon dioxide into a supercritical state (the pressure is 10MPa and the temperature is 350K), the carbon dioxide can be directly stored in the low-pressure supercritical carbon dioxide storage tank 2 (the pressure in the tank is more than or equal to 8MPa and the temperature is more than or equal to 310K), or after the supercritical carbon dioxide is cooled by the heat exchanger T4 (the pressure is 10MPa and the temperature is 310K), the motor 6 drives the secondary compressor C2 to further compress the carbon dioxide (the pressure is 35MPa and the temperature is 400K), and then the carbon dioxide is stored in the high-pressure supercritical carbon dioxide storage tank 1 after passing through the heat exchanger T5. The primary compressor C1 can continuously run, and the secondary compressor C2 is only operated in the electricity consumption low-valley period, so that peak-shifting adjustment of electric power is realized.
The carbon dioxide in the high-pressure supercritical carbon dioxide storage tank 1 flows out through the one-way valve V6, and after transportation (in a pipeline, a tank truck, a ship and the like), the carbon dioxide can be used for geological utilization, ocean sealing, salt cavern, depleted oil and gas reservoirs and other geological sealing. When the geological utilization is adopted, the geological resource can be converted into a supercritical carbon dioxide storage container after the exploitation is completed, namely, the supercritical carbon dioxide storage container becomes a depleted oil and gas reservoir to store the supercritical carbon dioxide. The carbon dioxide in the low pressure supercritical carbon dioxide storage tank 2 and the liquid carbon dioxide storage tank 4 can be used for chemical and biological utilization of carbon dioxide.
Carbon dioxide in the liquid carbon dioxide storage tank 4 can be connected into the first-stage compressor C1 to enter a compression energy storage process after being heated through the one-way valve V4; the carbon dioxide in the low-pressure supercritical carbon dioxide storage tank 2 can be connected into the secondary compressor C2 through the one-way valve V2 to finish the recompression of the carbon dioxide in the tank.
Working medium in the regenerator H1 flows through the heat exchangers T2, T4 and T5 to be precooled by carbon dioxide, and the precooled working medium flows into the regenerator H2 to realize the storage of heat energy; the working medium in the heat accumulator H2 flows through the heat exchangers T1 and T3 to heat carbon dioxide, and the heated working medium flows into the cold accumulator H1 to store cold energy.
The system provided by the invention can realize continuous and stable long-term operation, has long service life, does not have carbon emission in the whole energy release and storage process, and does not change the purity of carbon dioxide. On the basis of a typical CCUS technology, the application of supercritical carbon dioxide in the energy storage direction is increased, an effective technical support is provided for realizing the integration of electric power source network load storage of a fuel power plant, and the energy storage system can be used as a large-scale long-time energy storage technology to realize power grid load adjustment, peak clipping and valley filling.
The carbon dioxide utilized by geology can be converted into a supercritical carbon dioxide storage container after geological resource exploitation is completed, namely, the supercritical carbon dioxide is stored as a depleted oil and gas reservoir.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. A coupling system for carbon capture, utilization, sealing and supercritical carbon dioxide energy storage technology is characterized in that: the device comprises a first-stage expander E1, a second-stage expander E2, a first-stage compressor C1, a second-stage compressor C2, a high-pressure supercritical carbon dioxide storage tank (1), a low-pressure supercritical carbon dioxide storage tank (2), a generator (3), a liquid carbon dioxide storage tank (4), a carbon dioxide capturing device (5), a motor (6), a carbon dioxide sealing end (7) and a carbon dioxide utilization end (8);
the primary expander E1, the low-pressure supercritical carbon dioxide storage tank (2), the secondary expander E2, the liquid carbon dioxide storage tank (4), the primary compressor C1, the secondary compressor C2, the high-pressure supercritical carbon dioxide storage tank (1) and the carbon dioxide sealing end (7) are connected in series through pipelines in sequence;
the primary expander E1 is connected to the secondary expander E2 in a pipeline manner;
the primary expander E1 and the secondary expander E2 are connected to the generator (3) through a common pipeline;
the low-pressure supercritical carbon dioxide storage tank (2) and the liquid carbon dioxide storage tank (4) are respectively connected to the carbon dioxide utilization end (8) through pipelines;
the primary compressor C1 and the secondary compressor C2 are connected to an electric motor (6) through a common pipeline;
the carbon dioxide capturing device (5) is connected to the secondary compressor C2 in a pipeline manner;
the high-pressure supercritical carbon dioxide storage tank (1) is connected to the primary expander E1 through a pipeline;
the high-pressure supercritical carbon dioxide storage tank (1) and the carbon dioxide sealing end (7) are respectively connected to the primary expander E1 through a heat exchanger T1 for heating; the secondary expander E2 is connected to a liquid carbon dioxide storage tank (4) through a heat exchanger T2 for cooling; the liquid carbon dioxide storage tank (4) is connected to the primary compressor C1 through a heat exchanger T3 for heating; the primary compressor C1 is connected to the secondary compressor C2 through a heat exchanger T4 for cooling; the secondary compressor C2 is connected to a high-pressure supercritical carbon dioxide storage tank (1) through a heat exchanger T5 for cooling;
the primary compressor C1 is connected to the low-pressure supercritical carbon dioxide storage tank (2) in a pipeline mode, and the low-pressure supercritical carbon dioxide storage tank (2) is connected to the secondary compressor C2 in a pipeline mode.
2. A carbon capture utilization and sequestration and supercritical carbon dioxide energy storage technology coupling system in accordance with claim 1, wherein: the heat exchanger T1, the heat exchanger T2, the heat exchanger T3, the heat exchanger T4 and the heat exchanger T5 are connected with the heat accumulator H2 and the cold accumulator H1.
3. A carbon capture utilization and sequestration and supercritical carbon dioxide energy storage technology coupling system in accordance with claim 1, wherein: the carbon dioxide sealing end (7) comprises ocean sealing and geological sealing.
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| CN114673571A (en) | 2022-06-28 |
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