A method and system for storing carbon dioxide and producing water, heat and hydrogen

Abstract

The present invention belongs to the field closely related to carbon neutrality, such as large-scale capture, utilization and storage of CO2, development and utilization of clean energy, and ecological governance. It specifically relates to a method and system for the application of CO2 storage, water extraction, heat extraction, and hydrogen production. It is a technical application centered on utilizing CO2 geological storage to displace formation saline water and utilizing renewable energy or other locally available energy sources to photolyze or electrolyze saline water to produce hydrogen; the system includes a CO2 capture and transportation module, a CO2 geological storage and saline layer displacement water extraction module, a water resource hydrogen production, heat extraction, and other valuable resource development and extraction module, and a resource comprehensive utilization module; the present invention can significantly increase the CO2 storage capacity, effectively solve the problem of efficient and large-scale disposal and utilization of produced saline water, and realize the coupling solution of renewable energy + CCUS + geothermal energy + hydrogen energy + resource development, with strong comprehensive benefits and long industrial chain potential, and is expected to improve the economic efficiency of CCUS and promote its large-scale commercialization.

Description

Technical Field

[0001] The present invention belongs to the technical field closely related to carbon neutrality, such as large-scale capture, utilization and storage of CO2 (CCUS), development and utilization of clean energy, and ecological control of desertification, and particularly relates to a method and system for CO2 storage, water collection, heat collection and hydrogen production. Background Art

[0002] Taking saline aquifer storage as an example, the CO2 entrapment mechanism in it mainly includes structural-lithological entrapment (free CO2), dissolution, residual and mineralization. When the volume of the pore space in the formation is constant, the main storage volume comes from the non-saturated pore space, the dissolution of CO2 by saline water and residual. However, in terms of absolute quantity, for saturated formations, the volume of structural entrapment is obviously very limited, and the solubility of CO2 in formation water is also low. Therefore, the absolute storage capacity of CO2 is not high. Therefore, if a part of the formation water can be taken out and a part of the space can be used for free storage of CO2 (relying on structural-lithological entrapment), the storage capacity of CO2 will be greatly increased, which may become an important reason for CO2 storage and water extraction. However, if large-scale saline water is not effectively treated or utilized, it may not only further increase the cost but also cause environmental damage. Therefore, efficient treatment of produced water is a very critical issue in CO2 storage and water extraction. Summary of the invention

[0003] In order to overcome the above problems, the present invention provides a method and system for CO2 storage, water extraction, heat extraction and hydrogen production application, which is a technical application centered on utilizing CO2 geological storage to displace formation saline water and utilizing renewable energy or other locally available energy sources to produce hydrogen from saline water by photolysis or electrolysis; on the one hand, it can make full use of various available renewable energy or other energy sources; second, it achieves a significant increase in CO2 storage capacity; third, it not only solves the disposal problem of produced saline water, but also regards the produced saline water as a "primary energy source", and obtains additional green hydrogen energy through photolysis or electrolysis; fourth, the combustion and utilization of hydrogen energy output is pure fresh water, that is, indirect desalination of saline water is achieved, and fresh water is a scarce resource in many regions, especially in the northern region with abundant renewable energy; fifth, with fresh water resources, industrial and agricultural production and life utilization can be carried out, industrial economy can be developed, and society can benefit. A typical example is ecological governance and ecological agriculture in arid areas; in addition, this technology can also extract and utilize geothermal resources, obtain additional green energy benefits, and even extract other valuable resources in underground saline water, such as lithium salts and potassium salts. Therefore, this technology system is related to various industries such as CCUS, solar energy, wind energy, hydrogen energy, geothermal energy, water resources, and agriculture. It is a new technology application with strong comprehensive benefits and the potential to form a long industrial chain.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A method for applying CO2 storage, water extraction, heat extraction and hydrogen production, the specific content of which is: through CO2 geological storage, drive the formation water and liquid mineral resources in the saline layer to flow and flow out from the production well, extract hydrogen energy, heat energy, fresh water resources and other valuable resources on the ground, and realize effective and high-value utilization of the extracted resources.

[0006] A CO2 storage, water extraction, heat extraction, and hydrogen production application system comprises a CO2 capture and transportation module, a CO2 geological storage and saline layer displacement water extraction module, a water resource heat extraction, hydrogen production, and other valuable resource development and extraction module, and a resource comprehensive utilization module; wherein the CO2 capture and transportation module is connected to the CO2 geological storage and saline layer displacement water extraction module, the CO2 geological storage and saline layer displacement water extraction module is connected to the water resource heat extraction, hydrogen production, and other valuable resource development and extraction module, and the water resource heat extraction, hydrogen production, and other valuable resource development and extraction module is connected to the resource comprehensive utilization module.

[0007] The CO2 capture and transportation module is responsible for capturing the CO2 emitted by the CO2 emission source and transporting it to the designated site after purification. The CO2 geological storage and saline layer displacement water extraction module is responsible for injecting the CO2 transported by the CO2 capture and transportation module into the target saline layer, and displacing the original formation saline water and liquid mineral resources in the saline layer, extracting the saline water and liquid mineral resources and separating the gas and water. The separated gas returns to the CO2 capture and transportation module and participates in the circulation process of CO2 geological storage to displace the formation saline water again. The separated liquid enters the water resource heat extraction, hydrogen production and other valuable resource development and extraction module; the water resource heat extraction, hydrogen production and other valuable resource development and extraction module is responsible for extracting the heat energy in the saline water and liquid mineral resources extracted by the CO2 geological storage and saline layer displacement water extraction module, as well as the fresh water resources and other valuable resources therein, and further extracting the hydrogen energy and oxygen energy therein; the resource comprehensive utilization and development module utilizes the extracted heat energy, other valuable resources, hydrogen energy, oxygen energy and fresh water resources.

[0008] The CO2 capture and transportation module includes a CO2 emission source 11, a CO2 capture device 12, and a CO2 purification device 13; the CO2 geological storage and saline water layer displacement water extraction module includes a CO2 injection pump 21, a CO2 injection well 22, a target saline water layer 23, a saline water production well 24, a saline water production pump 25, and a saline water-CO2 separation device 26; the water resource heat extraction and hydrogen production and other resource development and extraction modules include a thermal energy extraction device 301, a thermal energy storage device 311, a saline water desalination device 302, a fresh water storage device 312, a water hydrogen and oxygen production device 303, a hydrogen storage device 313, an oxygen storage device 314, a water hydrogen and oxygen production liquid product storage lake 323, a saline water storage lake 304, and a heavy metal resource Extraction device 305, heavy metal resource storage device 315, heavy metal resource extraction liquid product storage lake 325, mineral resource extraction device 306, mineral resource storage device 316, mineral resource extraction liquid product storage lake 326; wherein, one end of the CO2 injection well 22 is located on the surface, and the other end is located in the target saline layer 23; one end of the saline water production well 24 is located on the surface, and the other end is located in the target saline layer 23; the CO2 emission source 11 is connected to the inlet of the CO2 capture device 12, the outlet of the CO2 capture device 12 is connected to the inlet of the CO2 purification device 13, the outlet of the CO2 purification device 13 is connected to the inlet of the CO2 injection well 22 through the CO2 injection pump 21, and the outlet of the saline water production well 24 is connected to the inlet of the CO2 purification device 13 through the saline water production pump 21. 25 is communicated with the inlet of the salt water-CO2 separation device 26, the gas outlet of the salt water-CO2 separation device 26 is communicated with the inlet of the CO2 purification device 13, the liquid outlet of the salt water-CO2 separation device 26 is communicated with the inlet of the heat extraction device 301, the heat outlet of the heat extraction device 301 is communicated with the heat storage device 311, the liquid outlet of the heat extraction device 301 is communicated with the salt water storage lake 304, the salt water storage lake 304 is simultaneously communicated with the inlet of the salt water desalination device 302, the inlet of the water hydrogen production and oxygen production device 303, the inlet of the heavy metal resource extraction device 305, and the inlet of the mineral resource extraction device 306, the outlet of the salt water desalination device 302 is communicated with the inlet of the fresh water storage device 312 through a pipeline, and the water hydrogen production and oxygen production device 303 is communicated with the inlet of the heavy metal resource extraction device 305. The hydrogen outlet of the oxygen production device 303 is connected to the hydrogen storage device 313, the oxygen outlet of the water hydrogen production and oxygen production device 303 is connected to the oxygen storage device 314, the liquid product outlet of the water hydrogen production and oxygen production device 303 is connected to the inlet of the water hydrogen production and oxygen production liquid product storage lake 323, the solid product outlet of the heavy metal resource extraction device 305 is connected to the heavy metal resource storage device 315, the liquid product outlet of the heavy metal resource extraction device 305 is connected to the inlet of the heavy metal resource extraction liquid product storage lake 325, the solid product outlet of the mineral resource extraction device 306 is connected to the mineral resource storage device 316, and the liquid product outlet of the mineral resource extraction device 306 is connected to the mineral resource extraction liquid product storage lake 326;The outlet of the fresh water storage device 312 is respectively connected to the inlet of the water hydrogen and oxygen production device 303, the inlet of the heavy metal resource extraction device 305, and the inlet of the mineral resource extraction device 306; the outlet of the water hydrogen and oxygen production liquid product storage lake 323 is respectively connected to the inlet of the salt water desalination device 302, the inlet of the heavy metal resource extraction device 305, and the inlet of the mineral resource extraction device 306; the outlet of the heavy metal resource extraction liquid product storage lake 325 is respectively connected to the inlet of the salt water desalination device 302, the inlet of the water hydrogen and oxygen production device 303, and the inlet of the mineral resource extraction device 306; the outlet of the mineral resource extraction liquid product storage lake 326 is respectively connected to the inlet of the salt water desalination device 302, the inlet of the water hydrogen and oxygen production device 303, and the inlet of the heavy metal resource extraction device 305.;

[0009] A method for using a CO2 storage, water collection, heat collection and hydrogen production application system, including the following contents:

[0010] Step 1: CO2 capture and transportation

[0011] The CO2 emitted by the CO2 emission source 11 is captured by the CO2 capture device 12, and the captured CO2 is purified by the CO2 purification device 13 to obtain high-purity CO2, and then transported to the site where the target saline layer 23 is located through the CO2 transportation pipeline 14;

[0012] Step 2: CO2 geological storage and saline aquifer displacement

[0013] Driven by the CO2 injection pump 21, the high-purity CO2 flows through the CO2 injection well 22 and is stored in the target saline water layer 23 located underground, and drives the high-temperature formation saline water and liquid mineral resources in the target saline water layer 23 to flow. With the help of the power extraction of the saline water extraction pump 25, the high-temperature formation saline water and liquid mineral resources in the target saline water layer 23 flow through the saline water extraction well 24 and are extracted. At this time, a mixture of high-temperature saline water, liquid mineral resources and CO2 is obtained; the mixture enters the saline water-CO2 separation device 26 through the saline water-CO2 circulation pipeline 27, and the separated CO2 re-enters the CO2 purification device 13 through the CO2 transportation pipeline 14 and circulates to participate in the CO2 geological storage and saline water layer displacement water extraction process. The separated liquid is high-temperature formation saline water containing liquid mineral resources;

[0014] Step 3: Water resources heat production hydrogen and other valuable resource development and extraction

[0015] (1) High-temperature stratum salt water flows through the salt water transport pipeline 300 and enters the heat energy extraction device 301; the extracted heat energy is stored in the heat energy storage device 311; the liquid outlet product of the heat energy extraction device 301 is low-temperature stratum salt water with a lower temperature than the inlet temperature of the heat energy extraction device 301, which flows through the salt water transport pipeline 300 and is stored in the salt water storage lake 304;

[0016] (2) Salt water from the salt water storage lake 304, the fresh water resource storage lake 312, the water hydrogen and oxygen production liquid product storage lake 323 or the mineral resource extraction liquid product storage lake 326 enters the heavy metal resource extraction device 305 through the resource extraction integrated pipeline network 3000, and the heavy metal resources therein are extracted. The solid product is stored in the heavy metal resource storage device 315, and the liquid product is stored in the heavy metal resource extraction liquid product storage lake 325;

[0017] (3) Salt water from the salt water storage lake 304, the fresh water resource storage lake 312, the water hydrogen and oxygen production liquid product storage lake 323 or the heavy metal resource extraction liquid product storage lake 325 enters the mineral resource extraction device 306 through the resource extraction integrated pipeline network 3000, and the mineral resources therein are extracted, the solid product is stored in the mineral resource storage device 316, and the liquid product is stored in the mineral resource extraction liquid product storage lake 326;

[0018] (4) Salt water from the salt water storage lake 304, the water hydrogen and oxygen production liquid product storage lake 323, the heavy metal resource extraction liquid product storage lake 325, or the mineral resource extraction liquid product storage lake 326 enters the salt water desalination device 302 through the resource extraction integrated pipeline network 3000, and is desalinated to obtain fresh water resources, which are then stored in the fresh water storage device 312;

[0019] (5) Salt water from the salt water storage lake 304, the fresh water resource storage lake 312, the heavy metal resource extraction liquid product storage lake 325 or the mineral resource extraction liquid product storage lake 326 enters the water hydrogen production and oxygen production device 303 through the resource extraction integrated pipeline network 3000 to obtain hydrogen resources and oxygen resources, which are stored in the hydrogen storage device 313 and the oxygen storage device 314 respectively; the liquid products are stored in the water hydrogen production and oxygen production liquid product storage lake 323;

[0020] Step 4: Comprehensive Utilization of Resources

[0021] The heat energy, hydrogen energy, oxygen energy, fresh water resources and other valuable resources extracted in step three can be effectively utilized through various corresponding resource utilization methods.

[0022] In the step three, the hydrogen production method of the water hydrogen production and oxygen production device 303 includes photolysis hydrogen production and electrolysis hydrogen production; the source of light resources in photolysis hydrogen production is sunlight, and the source of electricity resources in electrolysis hydrogen production includes solar power generation and wind power generation.

[0023] The other valuable resources in step 4 include heavy metal resources and mineral resources.

[0024] The resource utilization methods in step 4 include geothermal heating, geothermal power generation, hydrogen household energy, hydrogen fuel cells, hydrogen vehicles, hydrogen power generation, domestic water, industrial water, agricultural irrigation, desertification control, and groundwater recharge.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention solves the bottleneck problem that restricts the large-scale increase of CO2 storage capacity by sealing water and producing hydrogen, and can also effectively improve the difficulty of CO2 injection.

[0027] (2) The present invention uses salt water extracted from underground displacement to produce hydrogen, which actually realizes the view of underground salt water as a "primary energy source" and expands the source of water resources for hydrogen production by photolysis or electrolysis of water.

[0028] (3) The present invention utilizes the combustion of salt water to produce hydrogen, which can generate fresh water resources and indirectly realize the desalination of salt water. It is combined with the direct desalination treatment plan of salt water and develops a back-end application system on this basis, which is of great significance to industrial and agricultural production in arid areas.

[0029] (4) The present invention effectively solves the problem of efficient and large-scale disposal and utilization of extracted salt water by sealing and extracting water for hydrogen production, and provides a solution of coupling renewable energy + CCUS + geothermal energy + hydrogen energy + resource development.

[0030] (5) This invention is related to various industries such as CCUS, solar energy, wind energy, hydrogen energy, geothermal energy, water resources, and agriculture. It not only makes full use of various renewable energy or other energy sources, but also has strong comprehensive benefits and the potential to form a long industrial chain.

[0031] (6) This invention is expected to effectively improve the economic efficiency of CCUS technology and promote the large-scale commercialization of CCUS technology, especially saline aquifer storage technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without creative work.

[0033] Figure 1 is a flow chart of the method of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the system of the present invention;

[0035] In the figure: 11, CO2 emission source; 12, CO2 capture device; 13, CO2 purification device; 14, CO2 transportation pipeline; 21, CO2 injection pump; 22, CO2 injection well; 23, target salt water layer; 24, salt water production well; 25, salt water production pump; 26, salt water-CO2 separation device; 27, salt water-CO2 circulation pipeline; 300, salt water transportation pipeline; 3000, resource extraction integrated pipeline network; 301, thermal energy extraction device; 311, thermal energy storage device; 302, salt water desalination device; 312, fresh water storage device; 30 3. Water-based hydrogen and oxygen production device; 313. Hydrogen storage device; 314. Oxygen storage device; 323. Water-based hydrogen and oxygen production liquid product storage lake; 304. Salt water storage lake; 305. Heavy metal resource extraction device; 315. Heavy metal resource storage device; 325. Heavy metal resource extraction liquid product storage lake; 306. Mineral resource extraction device; 316. Mineral resource storage device; 326. Mineral resource extraction liquid product storage lake; 41. Residential area; 42. Hydrogen power generation plant; The solid line is the flow direction of CO2, and the dotted line is the flow direction of stratum salt water. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] Example 1

[0038] A method for applying CO2 storage, water extraction, heat extraction and hydrogen production, the specific content of which is: through CO2 geological storage, formation water and liquid mineral resources in the saline layer are driven to flow and flow out from the production well, and various corresponding technical means are used on the ground to extract hydrogen energy, heat energy, fresh water resources and other valuable resources therein, and realize effective and high-value utilization of the extracted resources.

[0039] A CO2 storage, water extraction, heat extraction, and hydrogen production application system comprises a CO2 capture and transportation module, a CO2 geological storage and saline layer displacement water extraction module, a water resource heat extraction, hydrogen production, and other valuable resource development and extraction module, and a resource comprehensive utilization module; wherein the CO2 capture and transportation module is connected to the CO2 geological storage and saline layer displacement water extraction module, the CO2 geological storage and saline layer displacement water extraction module is connected to the water resource heat extraction, hydrogen production, and other valuable resource development and extraction module, and the water resource heat extraction, hydrogen production, and other valuable resource development and extraction module is connected to the resource comprehensive utilization module.

[0040] The CO2 capture and transportation module is responsible for capturing the CO2 emitted by the CO2 emission source and transporting it to the designated site after purification. The CO2 geological storage and saline layer displacement water extraction module is responsible for injecting the CO2 transported by the CO2 capture and transportation module into the target saline layer, displacing the original formation saline water and liquid mineral resources in the saline layer, extracting the saline water and liquid mineral resources and separating the gas and water. The separated gas returns to the CO2 capture and transportation module and participates in the CO2 geological storage to displace the formation saline water again. The separated liquid enters the water resource heat extraction, hydrogen production and other valuable resource development and extraction module; the water resource heat extraction, hydrogen production and other valuable resource development and extraction module is responsible for extracting the heat energy from the salt water and liquid mineral resources produced by the CO2 geological storage and saline layer displacement water extraction module, as well as the fresh water resources and other valuable resources therein, and further extracting the hydrogen energy and oxygen energy therein; the comprehensive resource utilization and development module makes effective and high-value use of the extracted heat energy, other valuable resources, hydrogen energy, oxygen energy and fresh water resources.

[0041] The CO2 capture and transportation module includes a CO2 emission source 11, a CO2 capture device 12, a CO2 purification device 13, and a CO2 transportation corridor 14; the CO2 geological storage and saline water layer displacement water extraction module includes a CO2 injection pump 21, a CO2 injection well 22, a target saline water layer 23, a saline water production well 24, a saline water production pump 25, a saline water-CO2 separation device 26, and a saline water-CO2 circulation pipeline 27; the water resource heat extraction and hydrogen production and other resource development and extraction modules include a saline water transportation pipeline 300, a heat energy extraction device 301, a heat energy storage device 311, a saline water desalination device 302, a fresh water storage device 312, a water Hydrogen production and oxygen production device 303, hydrogen storage device 313, oxygen storage device 314, water hydrogen production and oxygen production liquid product storage lake 323, salt water storage lake 304, heavy metal resource extraction device 305, heavy metal resource storage device 315, heavy metal resource extraction liquid product storage lake 325, mineral resource extraction device 306, mineral resource storage device 316, mineral resource extraction liquid product storage lake 326, resource extraction integrated pipeline network 3000; wherein, one end of the CO2 injection well 22 is located on the surface, and the other end is located in the target salt water layer 23; one end of the salt water production well 24 is located on the surface, and the other end is located in the target salt water layer 23;The CO2 emission source 11 is connected to the inlet of the CO2 capture device 12 through the CO2 transport pipeline 14, the outlet of the CO2 capture device 12 is connected to the inlet of the CO2 purification device 13 through the CO2 transport pipeline 14, the outlet of the CO2 purification device 13 is connected to the inlet of the CO2 injection well 22 through the CO2 transport pipeline 14 and the CO2 injection pump 21, the outlet of the salt water production well 24 is connected to the inlet of the salt water-CO2 separation device 26 through the salt water production pump 25 and the salt water-CO2 circulation pipeline 27, the gas outlet of the salt water-CO2 separation device 26 is connected to the inlet of the CO2 purification device 13 through the CO2 transport pipeline 14, and the liquid outlet of the salt water-CO2 separation device 26 is connected to the heat extraction device 26 through the salt water transport pipeline 300. The heat outlet of the heat extraction device 301 is connected to the heat energy storage device 311, the liquid outlet of the heat extraction device 301 is connected to the salt water storage lake 304 through the salt water transportation pipeline 300, and the salt water storage lake 304 is connected to the inlet of the salt water desalination device 302, the inlet of the water hydrogen production and oxygen production device 303, the inlet of the heavy metal resource extraction device 305, and the inlet of the mineral resource extraction device 306 through the salt water transportation pipeline 300 respectively. The outlet of the salt water desalination device 302 is connected to the inlet of the fresh water storage device 312 through a pipeline, the hydrogen outlet of the water hydrogen production and oxygen production device 303 is connected to the hydrogen storage device 313, the oxygen outlet of the water hydrogen production and oxygen production device 303 is connected to the oxygen storage device 314, and the water hydrogen production and oxygen production device 303 is connected to the oxygen storage device 315. The liquid product outlet of the oxygen device 303 is connected to the inlet of the water hydrogen production and oxygen production liquid product storage lake 323, the solid product outlet of the heavy metal resource extraction device 305 is connected to the heavy metal resource storage device 315, the liquid product outlet of the heavy metal resource extraction device 305 is connected to the inlet of the heavy metal resource extraction liquid product storage lake 325, the solid product outlet of the mineral resource extraction device 306 is connected to the mineral resource storage device 316, and the liquid product outlet of the mineral resource extraction device 306 is connected to the mineral resource extraction liquid product storage lake 326; the outlet of the fresh water storage device 312 is respectively connected to the inlet of the water hydrogen production and oxygen production device 303, the inlet of the heavy metal resource extraction device 305, and the mineral resource extraction liquid product storage lake 326 through the resource extraction integrated pipe network 3000. The inlet of the extraction device 306 is connected, the outlet of the water hydrogen and oxygen production liquid product storage lake 323 is respectively connected with the inlet of the salt water desalination device 302, the inlet of the heavy metal resource extraction device 305, and the inlet of the mineral resource extraction device 306 through the resource extraction comprehensive pipe network 3000, the outlet of the heavy metal resource extraction liquid product storage lake 325 is respectively connected with the inlet of the salt water desalination device 302, the inlet of the water hydrogen and oxygen production device 303, and the inlet of the mineral resource extraction device 306 through the resource extraction comprehensive pipe network 3000, and the outlet of the mineral resource extraction liquid product storage lake 326 is respectively connected with the inlet of the salt water desalination device 302, the inlet of the water hydrogen and oxygen production device 303, and the inlet of the heavy metal resource extraction device 305 through the resource extraction comprehensive pipe network 3000. ;

[0042] A method for using a CO2 storage, water collection, heat collection and hydrogen production application system, including the following contents:

[0043] Step 1: CO2 capture and transportation

[0044] The CO2 emitted by the CO2 emission source 11 is captured by the CO2 capture device 12. The captured CO2 is pure or impure. It is purified by the CO2 purification device 13 to obtain high-purity CO2, and then transported to the site of the target saline layer 23 through the CO2 transportation pipeline 14;

[0045] Step 2: Geological storage of CO2 in saline aquifers to displace water

[0046] Driven by the CO2 injection pump 21, the high-purity CO2 flows through the CO2 injection well 22 and is stored in the target saline water layer 23 located underground, and drives the high-temperature formation saline water and liquid mineral resources in the target saline water layer 23 to flow. With the help of the power extraction of the saline water extraction pump 25, the high-temperature formation saline water and liquid mineral resources in the target saline water layer 23 flow through the saline water extraction well 24 and are extracted. At this time, a mixture of high-temperature saline water, liquid mineral resources and CO2 is obtained; the mixture enters the saline water-CO2 separation device 26 through the saline water-CO2 circulation pipeline 27, and the separated CO2 re-enters the CO2 purification device 13 through the CO2 transportation pipeline 14 and circulates to participate in the CO2 geological storage and saline water layer displacement water extraction process. The separated liquid is high-temperature formation saline water containing liquid mineral resources;

[0047] Step 3: Water resources heat production hydrogen and other valuable resource development and extraction

[0048] (1) High-temperature stratum salt water flows through the salt water transport pipeline 300 and enters the heat energy extraction device 301; the extracted heat energy is stored in the heat energy storage device 311; the liquid outlet product of the heat energy extraction device 301 is low-temperature stratum salt water with a lower temperature than the inlet temperature of the heat energy extraction device 301, which flows through the salt water transport pipeline 300 and is stored in the salt water storage lake 304;

[0049] (2) Salt water from the salt water storage lake 304, the fresh water resource storage lake 312, the water hydrogen and oxygen production liquid product storage lake 323 or the mineral resource extraction liquid product storage lake 326 enters the heavy metal resource extraction device 305 through the resource extraction integrated pipeline network 3000, and the heavy metal resources therein are extracted. The solid product is stored in the heavy metal resource storage device 315, and the liquid product is stored in the heavy metal resource extraction liquid product storage lake 325;

[0050] (3) Salt water from the salt water storage lake 304, the fresh water resource storage lake 312, the water hydrogen and oxygen production liquid product storage lake 323 or the heavy metal resource extraction liquid product storage lake 325 enters the mineral resource extraction device 306 through the resource extraction integrated pipeline network 3000, and the mineral resources therein are extracted, the solid product is stored in the mineral resource storage device 316, and the liquid product is stored in the mineral resource extraction liquid product storage lake 326;

[0051] (4) Salt water from the salt water storage lake 304, the water hydrogen and oxygen production liquid product storage lake 323, the heavy metal resource extraction liquid product storage lake 325, or the mineral resource extraction liquid product storage lake 326 enters the salt water desalination device 302 through the resource extraction integrated pipeline network 3000, and is desalinated to obtain fresh water resources, which are then stored in the fresh water storage device 312;

[0052] (5) Salt water from the salt water storage lake 304, the fresh water resource storage lake 312, the heavy metal resource extraction liquid product storage lake 325 or the mineral resource extraction liquid product storage lake 326 enters the water hydrogen production and oxygen production device 303 through the resource extraction integrated pipeline network 3000 to obtain hydrogen resources and oxygen resources, which are stored in the hydrogen storage device 313 and the oxygen storage device 314 respectively; the liquid products are stored in the water hydrogen production and oxygen production liquid product storage lake 323;

[0053] That is, it is realized to extract other valuable resources from salt water and store them in the corresponding valuable resource storage device;

[0054] Step 4: Comprehensive Utilization of Resources

[0055] The heat energy, hydrogen energy, oxygen energy, fresh water resources and other valuable resources extracted in step three can be effectively utilized through various corresponding resource utilization methods.

[0056] In the step three, the hydrogen production method of the water hydrogen production and oxygen production device 303 includes photolysis hydrogen production and electrolysis hydrogen production; the source of light resources in photolysis hydrogen production is sunlight, and the source of electricity resources in electrolysis hydrogen production includes solar power generation and wind power generation.

[0057] The other valuable resources in step 4 include heavy metal resources and mineral resources.

[0058] The resource utilization methods in step 4 include geothermal heating, geothermal power generation, hydrogen household energy, hydrogen fuel cells, hydrogen vehicles, hydrogen power generation, domestic water, industrial water, agricultural irrigation, desertification control, and groundwater recharge.

[0059] Example 2

[0060] A method and system for CO2 storage, water extraction, heat extraction and hydrogen production is designed to inject CO2 into underground saline aquifers, displace and extract high-temperature stratum saline water, and extract valuable resources such as heat energy, hydrogen energy, fresh water resources, and mineral resources from the high-temperature saline water for heat and heating, power generation, fresh water irrigation, etc. to enhance economic benefits, while achieving large-scale geological storage of CO2.

[0061] See also Figure 2 , the present invention provides a technical solution:

[0062] Salt water is widely distributed in northwest my country. Taking this region as an example, CO2 emission source 11 emits CO2 during production and life processes, which is directly or indirectly captured by CO2 capture device 12. The captured CO2 is pure or impure, and is purified by CO2 purification device 13 to obtain high-purity CO2, which is then transported to the target site through CO2 transportation pipeline 14. Driven by the CO2 injection pump 21, high-purity CO2 flows through the CO2 injection well 22 and is stored in the target saline water layer 23 located underground, and drives the high-temperature formation saline water and liquid mineral resources in the target saline water layer 23 to flow. Assisted by the power extraction of the saline water production pump 25, the high-temperature formation saline water and liquid mineral resources in the target saline water layer 23 flow through the saline water production well 24 and are extracted to the surface. At this time, a mixture of high-temperature saline water, liquid mineral resources and CO2 is obtained. The mixture enters the saline water-CO2 separation device 26 through the saline water-CO2 circulation pipeline 27. The separated CO2 re-enters the CO2 purification device 13 through the CO2 transport pipeline 14 and circulates to participate in the CO2 geological storage and saline water layer displacement water extraction process. The separated liquid is high-temperature formation saline water containing liquid mineral resources. The high-temperature formation salt water flows through the salt water transport pipeline 300 and enters the heat energy extraction device 301. The extracted heat energy is stored in the heat energy storage device 311. The outlet product of the heat energy extraction device 301 is low-temperature formation salt water with a lower temperature than the inlet temperature of the heat energy extraction device 301, which flows through the salt water transport pipeline 300 and is stored in the salt water storage lake 304. The salt water from the salt water storage lake 304 enters the salt water desalination device 302 through the resource extraction integrated pipeline network 3000, and after desalination treatment, fresh water resources are obtained and stored in the fresh water storage device 312. The salt water from the salt water storage lake 304 or the fresh water from the salt water desalination device 302 flows through the resource extraction integrated pipeline network 3000 and enters the water hydrogen and oxygen production device 303. Hydrogen resources and oxygen resources are obtained through photolysis or electrolysis, and are stored in the hydrogen storage device 313 and the oxygen storage device 314 respectively. The thermal energy storage device 311 is connected to the residential area 41 and can provide centralized heating for the residential area 41; the fresh water storage device 312 is connected to the residential area 41 and can provide domestic water for the residential area 41; the hydrogen storage device 313 is connected to the hydrogen power generation plant 42 to provide it with corresponding hydrogen energy, and the hydrogen combustion product - fresh water, can be further used for agricultural irrigation.

[0063] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, 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. These simple variations all belong to the protection scope of the present invention.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0065] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A CO2 storage, water and heat production hydrogen production application system, characterized in that: It includes a CO2 capture and transportation module, a CO2 geological storage and saline water layer displacement water extraction module, a water resource heat extraction hydrogen production and other valuable resource development and extraction module, and a resource comprehensive utilization module; wherein, the CO2 capture and transportation module is connected to the CO2 geological storage and saline water layer displacement water extraction module, the CO2 geological storage and saline water layer displacement water extraction module is connected to the water resource heat extraction hydrogen production and other valuable resource development and extraction module, and the water resource heat extraction hydrogen production and other valuable resource development and extraction module is connected to the resource comprehensive utilization module; The CO2 capture and transportation module includes a CO2 emission source (11), a CO2 capture device (12), and a CO2 purification device (13); the CO2 geological storage and saline water layer displacement water extraction module includes a CO2 injection pump (21), a CO2 injection well (22), a target saline water layer (23), a saline water production well (24), a saline water production pump (25), and a saline water-CO2 separation device (26); the water resource heat extraction and hydrogen production and other valuable resource development and extraction modules include a heat energy extraction device (301), a heat energy storage device (311), a saline water desalination device (302), a fresh water storage device (312), and a water hydrogen and oxygen production device (303). , a hydrogen storage device (313), an oxygen storage device (314), a water-to-hydrogen-to-oxygen liquid product storage lake (323), a salt water storage lake (304), a heavy metal resource extraction device (305), a heavy metal resource storage device (315), a heavy metal resource extraction liquid product storage lake (325), a mineral resource extraction device (306), a mineral resource storage device (316) and a mineral resource extraction liquid product storage lake (326); wherein one end of the CO2 injection well (22) is located on the surface and the other end is located in the target salt water layer (23); one end of the salt water production well (24) is located on the surface and the other end is located in the target salt water layer (23);The CO2 emission source (11) is connected to the inlet of the CO2 capture device (12), the outlet of the CO2 capture device (12) is connected to the inlet of the CO2 purification device (13), the outlet of the CO2 purification device (13) is connected to the inlet of the CO2 injection well (22) through the CO2 injection pump (21), the outlet of the salt water production well (24) is connected to the inlet of the salt water-CO2 separation device (26) through the salt water production pump (25), the gas outlet of the salt water-CO2 separation device (26) is connected to the inlet of the CO2 purification device (13), the liquid outlet of the salt water-CO2 separation device (26) is connected to the inlet of the heat extraction device (301), and the heat outlet of the heat extraction device (301) is connected to the heat storage device The heat energy extraction device (301) is connected to the salt water storage lake (304), and the salt water storage lake (304) is also connected to the inlet of the salt water desalination device (302), the inlet of the water hydrogen production and oxygen production device (303), the inlet of the heavy metal resource extraction device (305), and the inlet of the mineral resource extraction device (306). The outlet of the salt water desalination device (302) is connected to the inlet of the fresh water storage device (312) through a pipeline, the hydrogen outlet of the water hydrogen production and oxygen production device (303) is connected to the hydrogen storage device (313), the oxygen outlet of the water hydrogen production and oxygen production device (303) is connected to the oxygen storage device (314), and the liquid product outlet of the water hydrogen production and oxygen production device (303) is connected to the oxygen storage device (315). The outlet of the fresh water storage device (312) is connected to the inlet of the water hydrogen and oxygen production liquid product storage lake (323), the solid product outlet of the heavy metal resource extraction device (305) is connected to the heavy metal resource storage device (315), the liquid product outlet of the heavy metal resource extraction device (305) is connected to the inlet of the heavy metal resource extraction liquid product storage lake (325), the solid product outlet of the mineral resource extraction device (306) is connected to the mineral resource storage device (316), and the liquid product outlet of the mineral resource extraction device (306) is connected to the mineral resource extraction liquid product storage lake (326); the outlet of the fresh water storage device (312) is respectively connected to the inlet of the water hydrogen and oxygen production device (303), the inlet of the heavy metal resource extraction device (305) The inlet of the water-to-hydrogen-and-oxygen production liquid product storage lake (323) is connected to the inlet of the salt water desalination device (302), the inlet of the heavy metal resource extraction device (305), and the inlet of the mineral resource extraction device (306), respectively; the outlet of the heavy metal resource extraction liquid product storage lake (325) is connected to the inlet of the salt water desalination device (302), the inlet of the water-to-hydrogen-and-oxygen production device (303), and the inlet of the mineral resource extraction device (306), respectively; the outlet of the mineral resource extraction liquid product storage lake (326) is connected to the inlet of the salt water desalination device (302), the inlet of the water-to-hydrogen-and-oxygen production device (303), and the inlet of the heavy metal resource extraction device (305).

2. A method for using the CO2 storage, water extraction, heat extraction and hydrogen production application system according to claim 1, characterized in that: It includes the following: Step 1: CO2 capture and transportation The CO2 emitted by the CO2 emission source (11) is captured by a CO2 capture device (12), the captured CO2 is purified by a CO2 purification device (13) to obtain high-purity CO2, and is transported to the site of the target saline layer (23) through a CO2 transport pipeline (14); Step 2: CO2 geological storage and saline aquifer displacement Driven by the CO2 injection pump (21), high-purity CO2 flows through the CO2 injection well (22) and is stored in the target saline water layer (23) located underground, and drives the high-temperature formation saline water and liquid mineral resources in the target saline water layer (23) to flow. With the help of the power extraction of the saline water extraction pump (25), the high-temperature formation saline water and liquid mineral resources in the target saline water layer (23) flow through the saline water extraction well (24) and are extracted. At this time, a mixture of high-temperature formation saline water, liquid mineral resources and CO2 is obtained; the mixture enters the saline water-CO2 separation device (26) through the saline water-CO2 circulation pipeline (27), and the separated CO2 re-enters the CO2 purification device (13) through the CO2 transportation pipeline (14) and circulates to participate in the CO2 geological storage and saline water layer displacement water extraction process. The separated liquid is high-temperature formation saline water containing liquid mineral resources; Step 3: Water resources heat production hydrogen and other valuable resource development and extraction (1) High-temperature stratum salt water flows through a salt water transport pipeline (300) and enters a heat energy extraction device (301); the extracted heat energy is stored in a heat energy storage device (311); the liquid outlet product of the heat energy extraction device (301) is low-temperature stratum salt water having a lower temperature than the inlet temperature of the heat energy extraction device (301), which flows through a salt water transport pipeline (300) and is stored in a salt water storage lake (304); (2) Salt water from the salt water storage lake (304), the fresh water resource storage lake (312), the water hydrogen and oxygen production liquid product storage lake (323) or the mineral resource extraction liquid product storage lake (326) enters the heavy metal resource extraction device (305) through the resource extraction integrated pipeline network (3000), and the heavy metal resources therein are extracted, the solid product is stored in the heavy metal resource storage device (315), and the liquid product is stored in the heavy metal resource extraction liquid product storage lake (325); (3) Salt water from the salt water storage lake (304), the fresh water resource storage lake (312), the water hydrogen and oxygen production liquid product storage lake (323) or the heavy metal resource extraction liquid product storage lake (325) enters the mineral resource extraction device (306) through the resource extraction integrated pipeline network (3000), and the mineral resources therein are extracted, the solid product is stored in the mineral resource storage device (316), and the liquid product is stored in the mineral resource extraction liquid product storage lake (326); (4) Salt water from the salt water storage lake (304), the water-to-hydrogen-to-oxygen liquid product storage lake (323), the heavy metal resource extraction liquid product storage lake (325), or the mineral resource extraction liquid product storage lake (326) enters the salt water desalination device (302) through the resource extraction integrated pipeline network (3000), undergoes desalination treatment, obtains fresh water resources, and is stored in the fresh water storage device (312); (5) Salt water from the salt water storage lake (304), the fresh water resource storage lake (312), the heavy metal resource extraction liquid product storage lake (325) or the mineral resource extraction liquid product storage lake (326) enters the water hydrogen production and oxygen production device (303) through the resource extraction integrated pipeline network (3000), obtains hydrogen resources and oxygen resources, and stores them in the hydrogen storage device (313) and the oxygen storage device (314) respectively; the liquid products are stored in the water hydrogen production and oxygen production liquid product storage lake (323); Step 4: Comprehensive Utilization of Resources The thermal energy, hydrogen energy, oxygen energy, fresh water resources, heavy metal resources, and mineral resources extracted in step three are effectively utilized through various corresponding resource utilization methods.

3. The method of use according to claim 2, characterized in that: In the step 3, the hydrogen production method of the water hydrogen production and oxygen production device (303) includes photolysis hydrogen production and electrolysis hydrogen production; wherein the source of light resources in photolysis hydrogen production is sunlight, and the source of electricity resources in electrolysis hydrogen production includes solar power generation and wind power generation.

4. The method of use according to claim 2, characterized in that: The resource utilization methods in step 4 include geothermal heating, geothermal power generation, hydrogen household energy, hydrogen fuel cells, hydrogen vehicles, hydrogen power generation, domestic water, industrial water, agricultural irrigation, desertification control and groundwater recharge.

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