Gas storage leak gas capture system

Abstract

The embodiment of the present application discloses a kind of gas trapping systems of gas storage leakage, comprising: exhaust component, exhaust component is connected to gas storage, exhaust component is used to discharge gaseous energy storage working medium leaked by gas storage;Absorption part, absorption part is connected to exhaust component;Absorption part is provided with or connected with absorbent;Gaseous energy storage working medium leaked by gas storage can be reacted with absorbent to generate reaction liquid;Regeneration part, regeneration part connects absorption part;Regeneration part is used to receive the reaction liquid output by absorption part.The gas trapping system of gas storage leakage disclosed in the embodiment of the present application can capture and recover gaseous energy storage working medium in gas leaked from gas storage by absorption part, exhaust component and regeneration part, so as to realize the effect of energy saving, reducing the harm caused by gaseous energy storage working medium leakage.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to a gas leakage capture system for a gas storage facility. Background Technology

[0002] Energy storage technologies are divided into chemical energy storage and physical energy storage. Carbon dioxide energy storage is a novel physical energy storage technology that uses carbon dioxide as the main working fluid, based on the gas-liquid phase change of carbon dioxide to achieve energy storage. Carbon dioxide energy storage technology can be referenced in Chinese patents CN112985144B, CN112985145B, and CN114109549B, the entire contents of which are incorporated herein by reference. Existing carbon dioxide energy storage systems include a gas storage tank for storing the working fluid gas, with a containment cavity for holding gaseous carbon dioxide. During the use of carbon dioxide energy storage systems, there is a risk that the inner membrane of the gas storage tank may be damaged, leading to leakage and escape of the stored working fluid gas. Currently, there is no solution for capturing the leaked working fluid in the event of a gas storage tank leak. Summary of the Invention

[0003] Therefore, to fill at least one gap in the prior art, this embodiment of the invention provides a gas storage leak capture system to capture the gaseous energy storage medium in the gas leaking from the gas storage tank and prevent the leaked gaseous energy storage medium from escaping into the external environment.

[0004] An embodiment of the present invention provides a gas leakage capture system for a gas storage facility, comprising: an exhaust assembly connected to the gas storage facility, the exhaust assembly being used to discharge gaseous energy storage medium leaking from the gas storage facility; an absorption section connected to the exhaust assembly; an absorbent being disposed inside the absorption section or an absorbent being connected to the outside of the absorption section; the gaseous energy storage medium leaking from the gas storage facility reacting with the absorbent to generate a reaction liquid; and a regeneration section connected to the absorption section; the regeneration section being used to receive the reaction liquid output by the absorption section.

[0005] In one embodiment, the gas storage leak capture system further includes a working fluid recovery container connected to the regeneration unit; the regeneration unit regenerates the reaction liquid to generate the gaseous energy storage working fluid; and the working fluid recovery container is used to receive the gaseous energy storage working fluid.

[0006] In one embodiment, the gas storage leak capture system further includes: an absorbent storage structure connected to the absorption section; the absorbent storage structure is used to provide the absorbent to the absorption section.

[0007] In one embodiment, the gas storage leak capture system further includes an absorbent recovery pipeline connected between the absorbent storage structure and the regeneration unit; the regeneration unit regenerates the reaction liquid to generate the absorbent, and the absorbent recovery pipeline is used to transport the absorbent to the absorbent storage structure.

[0008] In one embodiment, the exhaust assembly includes: a pneumatic conveying device for conveying the gaseous energy storage medium leaking from the gas storage tank, the pneumatic conveying device having an inlet end and an outlet end; an inlet pipe connected between the inlet end of the pneumatic conveying device and the gas storage tank; and a first exhaust pipe connected between the outlet end of the pneumatic conveying device and the absorption section.

[0009] In one embodiment, the exhaust assembly further includes a second exhaust pipe, one end of which is connected to the outlet end of the airflow conveying device, and the other end of which is in communication with the atmosphere.

[0010] In one embodiment, the gas storage tank includes an inner membrane and an outer membrane, with a sandwich cavity formed between the inner membrane and the outer membrane; the exhaust assembly is in communication with the sandwich cavity.

[0011] In one embodiment, the gas storage leak capture system further includes a concentration detection unit disposed within the interlayer cavity; the concentration detection unit is used to detect the concentration of the gaseous energy storage medium within the interlayer cavity.

[0012] In one embodiment, the gas storage leak capture system further includes an absorption section exhaust pipe, one end of which is connected to the gas outlet of the absorption section and the other end is connected to the interlayer cavity; and / or the gas outlet of the absorption section is in communication with the atmosphere.

[0013] In one embodiment, the gas storage leak capture system further includes: an exhaust device, the inlet of which is connected to the gas storage and the outlet of which is connected to the atmosphere; and / or an air supply device, the inlet of which is connected to the atmosphere and the outlet of which is connected to the gas storage.

[0014] In one embodiment, the gas storage leak capture system further includes a control module; the control module is electrically connected to the exhaust assembly.

[0015] Another embodiment of the present invention provides a gas leakage capture system for a gas storage facility, comprising: an absorbent spraying device disposed around the gas storage facility; the absorbent spraying device storing absorbent or having absorbent connected to its external end; the absorbent spraying device being used to spray absorbent around the gas storage facility to absorb gaseous energy storage medium leaking from the gas storage facility and form a reaction liquid; and a regeneration unit for collecting the reaction liquid.

[0016] As can be seen from the above, the embodiments of the present invention can achieve one or more of the following beneficial effects: By setting up an exhaust assembly, the gaseous energy storage medium leaking from the gas storage tank can be discharged into the absorption section. The absorption section can receive the gaseous energy storage medium into the absorbent and react with it, thus achieving the capture of the gaseous energy storage medium leaking from the gas storage tank. In addition, by setting up a regeneration section, the absorbent after the reaction can be regenerated to produce the gaseous energy storage medium. The regenerated gaseous energy storage medium can be stored in a working medium recovery container to achieve the recovery and utilization of the gaseous energy storage medium leaking from the gas storage tank, which has the effect of saving resources and energy. Attached Figure Description

[0017] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of a gas storage leak capture system provided in one embodiment of the present invention.

[0019] Figure 2a This is a schematic diagram of the reaction mechanism between the absorbent and the gaseous energy storage medium in one embodiment.

[0020] Figure 2b This is a schematic diagram of the reaction mechanism between the absorbent and the gaseous energy storage medium in another embodiment.

[0021] Figure 3 This is a schematic diagram of a gas storage leak capture system provided in a specific embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the circuit connection in a gas storage leak capture system provided in one embodiment of the present invention.

[0023] [Explanation of Labels in the Attached Image]

[0024] 10: Gas storage tank; 11: Inner membrane; 12: Outer membrane; 13: Interlayer cavity; 14: Ground film; 15: Receiving cavity; 20: Exhaust assembly; 21: Airflow conveying device; 22: Inlet pipe; 23: First exhaust pipe; 24: Second exhaust pipe; 31: Absorption section; 32: Regeneration section; 33: Working fluid recovery container; 34: Absorbent storage structure; 35: Absorbent recovery pipeline; 36: Absorption section exhaust pipeline; 41: Ventilation device; 42: Air supply device; 50: Concentration detection unit; 60: Absorbent spraying device; 70: Control module. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] It should also be noted that the division of multiple embodiments in this invention is only for the convenience of description and should not constitute a special limitation. Features in various embodiments can be combined and referenced in each other without contradiction.

[0029] In related technologies, a physical energy storage system, taking a carbon dioxide energy storage system as an example, generally includes a gas storage tank, an energy storage module, a liquid storage tank, and an energy release module connected in a closed loop. The gas storage tank has a cavity for containing gaseous carbon dioxide. The energy storage module, liquid storage tank, and energy release module can be collectively referred to as the working fluid operating system. During the operation of the carbon dioxide energy storage system, carbon dioxide undergoes gaseous-liquid transformation between the gas storage tank and the working fluid operating system. Specifically, in the energy storage and release process of the physical energy storage system, gaseous carbon dioxide flowing from the gas storage tank is transformed into liquid by the energy storage module and flows into the liquid storage tank to complete energy storage; liquid carbon dioxide flowing from the liquid storage tank is transformed into gas by the energy release module and flows into the gas storage tank to release the energy stored during the energy storage process.

[0030] During the operation of the aforementioned system, there is a risk that damage to the gas storage tank could lead to leakage of the gaseous energy storage medium, namely carbon dioxide, stored within the tank, ultimately escaping into the external environment. Therefore, this embodiment provides a gas leakage capture system for the gas storage tank in the aforementioned physical energy storage system to capture the leaked gaseous energy storage medium. The gas storage tank 10 is used in the physical energy storage system to store the gaseous energy storage medium. For example, the gas storage tank 10 is specifically the structure used to store gaseous carbon dioxide in the aforementioned carbon dioxide energy storage system. The specific structure of the gas storage tank 10 can be understood by referring to the gas storage tank disclosed in Chinese Invention Patent Publication No. CN113280252A. In some embodiments, the gas storage tank includes an inner membrane 11 and a ground membrane 14, with a receiving cavity 15 formed between the inner membrane 11 and the ground membrane 14. In some embodiments, the gas storage tank 10 also includes an outer membrane 12 disposed outside the inner membrane 11, with a sandwich cavity 13 formed between the inner membrane 11 and the outer membrane 12. The sandwich cavity 13 and the receiving cavity 15 are separated by the inner membrane 11. The interlayer cavity 13 generally contains air or other gases, but this is not a limitation of the embodiments of the present invention. Furthermore, the entire contents disclosed in CN113280252A are incorporated herein by reference as an integral part of the specification of this patent application.

[0031] like Figure 1 As shown, one embodiment of the present invention provides a gas storage leak capture system, including an exhaust assembly 20, an absorption section 31, and a regeneration section 32. The exhaust assembly 20 is connected to the gas storage 10 and is used to discharge the gaseous energy storage medium leaking from the gas storage 10; the absorption section 31 is connected to the exhaust assembly 20; the absorption section 31 is provided with an absorbent or has an absorbent connected to its exterior; the gaseous energy storage medium leaking from the gas storage 10 can react with the absorbent to generate a reaction liquid; the regeneration section 32 is connected to the absorption section 31 and is used to receive the reaction liquid output from the absorption section 31.

[0032] The exhaust assembly 20 is connected to the gas storage tank 10 and is used to exhaust the leaked gas (including the leaked gaseous energy storage medium) from the gas storage tank 10.

[0033] Furthermore, the gas storage tank 10 is connected to the exhaust assembly 20, wherein the exhaust assembly 20 can be configured as a separate exhaust pipe.

[0034] Furthermore, the gas storage tank 10 is connected to the exhaust assembly 20, wherein the exhaust assembly 20 includes an airflow conveying device 21, an air intake pipe 22, and a first exhaust pipe 23. For example, the exhaust assembly 20 is a device capable of drawing gas into a negative pressure to form a flow, including but not limited to air ducts and associated fans, air-powered equipment, etc.

[0035] The absorption section 31 is connected to the exhaust assembly 20. The absorption section 31 has a storage tank for storing the absorbent; alternatively, the absorption section 31 may be externally connected to the absorbent. The absorption section 31 receives leaked gas (containing leaked gaseous energy storage medium) from the exhaust assembly 20 and receives the gaseous energy storage medium from the leaked gas into the absorbent to react with it, generating a reaction liquid. The absorption section 31 can be, for example, an absorption tower, such as a plate tower or a packed tower. This embodiment does not limit the form of the absorption section 31; it can also be an absorption tank or similar form.

[0036] The regeneration unit 32 is connected to the other end of the absorption unit 31 and is used to receive the reaction liquid output by the absorption unit 31.

[0037] By providing the exhaust assembly 20, leaked gas from the gas storage tank 10 can be transported to the absorption unit 31. The absorption unit 31 can capture the gaseous energy storage medium in the leaked gas and react it with the absorbent, thus achieving the capture of the gaseous energy storage medium in the leaked gas. In addition, by providing the regeneration unit 32, the absorbent after the reaction can be regenerated to produce the gaseous energy storage medium, which has the effect of saving resources and energy.

[0038] In some embodiments, refer to Figure 1 The gas storage leak capture system also includes a working fluid recovery container 33, which is connected to a regeneration unit 32. The regeneration unit 32 regenerates the reaction liquid to generate a gaseous energy storage working fluid. The working fluid recovery container 33 is used to receive the gaseous energy storage working fluid.

[0039] The regeneration unit 32 is used to regenerate the reaction liquid to produce a gaseous energy storage medium and an absorbent. The regeneration unit 32 can be a building tank or a container with storage space, etc. In some embodiments, multiple independent chambers can be provided in the regeneration unit 32, such as a reaction liquid chamber for containing the reaction liquid before regeneration, a gas storage chamber for storing the regenerated gaseous energy storage medium, and an absorbent storage chamber for storing the absorbent obtained after regeneration.

[0040] For example, when the gaseous energy storage medium is carbon dioxide, the regeneration unit 32 can be connected to a heat source. The reaction liquid absorbs heat in the regeneration unit 32, causing carbon dioxide to escape, thus achieving regeneration of carbon dioxide gas and absorbent. The carbon dioxide gas escaping from the regeneration unit 32 is collected in the working medium recovery container 33, realizing the recovery of the gaseous energy storage medium from the leaked gas. The recovered carbon dioxide gas can be refilled into the gas storage tank 10 for use when the carbon dioxide energy storage system can resume normal operation. Of course, different regeneration processes can be adopted depending on the type of absorbent or gaseous energy storage medium, and this embodiment is not limited to the above example.

[0041] The gas storage chamber inside the regeneration section 32 can also serve as a temporary storage for the regenerated gaseous energy storage medium.

[0042] The working fluid recovery container 33 is connected to the regeneration unit 32 to receive the gaseous energy storage working fluid regenerated from the regeneration unit 32. The working fluid recovery container 33 can be in the form of a gas storage tank, gas storage facility, etc.

[0043] The working fluid recovery container 33 can be a container set separately outside the gas storage 10, or in some embodiments, the working fluid recovery container 33 can be the gas storage 10 itself. For example, after the gas storage 10 is repaired, the regenerated gaseous energy storage working fluid can continue to be returned to the gas storage 10, or when there is more than one gas storage 10, the regenerated gaseous energy storage working fluid can be transported to other undamaged gas storage 10s. That is, at this time, the working fluid recovery container 33 does not need to be set separately, and the gas storage 10 can realize the function of the working fluid recovery container 33.

[0044] By setting up a working fluid recovery container 33, the regenerated gaseous energy storage working fluid can be stored in the working fluid recovery container 33 to realize the recovery and utilization of the gaseous energy storage working fluid in the leaked gas, thereby achieving the effect of saving resources and energy.

[0045] The principle of the gas storage leak capture and recovery system provided in this embodiment is as follows: For example, the gaseous energy storage medium in the carbon dioxide energy storage system is carbon dioxide gas. When the gas storage tank 10 leaks, the leaked gas containing carbon dioxide gas is discharged by the exhaust assembly 20. The leaked gas is transported to the inlet end of the absorption section 31 through the exhaust assembly 20. The absorption section 31 stores (or is externally connected) an absorbent. The absorbent in the absorption section 31 reacts with the gaseous energy storage medium to form a reaction liquid. The reaction liquid enters the regeneration section 32.

[0046] Continue to refer to Figure 2a The absorbent can be a solution of MEA (HO-CH2-CH2-NH2), carbonic anhydrase (CA), or other solutions capable of absorbing carbon dioxide. MEA is both a primary amine and a primary alcohol, exhibiting weak alkalinity. MEA solution readily reacts with carbon dioxide to produce carbamate ions. In this reaction, the alcohol amine first reacts with carbon dioxide to form a zwitterion, which then undergoes deprotonation with the amine to generate a carbamate ion. MEA is represented by RNH2, where R is CH2CH2OH. The specific reaction process of MEA with carbon dioxide is as follows: Figure 2a As shown. Of course, MEA is only one specific example of an absorbent, and other absorbents capable of absorbing the gaseous energy storage medium can also be provided to the absorption unit 31 according to actual needs. For example, if the gaseous energy storage medium is hydrogen, the absorbent can be ethylcarbazole. The principle of using ethylcarbazole to absorb hydrogen is as follows: Figure 2b As shown. The absorption section 31 can be equipped with heating, pressurizing, vacuuming, or stirring devices to promote the reaction between the gaseous energy storage medium and the absorbent, depending on the reaction conditions of different gaseous energy storage media and corresponding absorbents. Simultaneously, appropriate catalysts can be added to the absorption section 31 to further promote the reaction.

[0047] In some embodiments, refer to Figure 3 The gas storage leak capture system also includes an absorbent storage structure 34, which is connected to the absorption unit 31. The absorbent storage structure 34 is used to supply absorbent to the absorption unit 31. The absorbent storage structure 34 can be, for example, a tank or a building pool, and has a certain volume to store the absorbent. Necessary pipelines and pumps are provided between the absorbent storage structure 34 and the absorption unit 31 to transport the absorbent stored in the absorbent storage structure 34 to the absorption unit 31 to absorb the gaseous energy storage medium in the leaked gas.

[0048] By setting up the absorbent storage structure 34, it is possible to effectively replenish the absorbent and view the usage status and remaining amount of the absorbent in real time.

[0049] Furthermore, the gas storage leak capture system also includes an absorbent recovery pipeline 35, which is connected between the absorbent storage structure 34 and the regeneration unit 32. The regeneration unit 32 regenerates the reaction liquid to generate absorbent, and the absorbent recovery pipeline 35 is used to recover the regenerated absorbent back into the absorbent storage structure 34.

[0050] The absorption agent can be recycled through the absorption agent recovery pipeline 35, realizing the dual recovery of gaseous energy storage medium and absorption agent, further saving resources and energy.

[0051] In some embodiments, the exhaust assembly 20 includes an airflow conveying device 21, an intake pipe 22, and a first exhaust pipe 23. The airflow conveying device 21 is used to transport the gaseous energy storage medium leaking from the gas storage tank 10, and has an inlet end and an outlet end. The intake pipe 22 is connected between the inlet end of the airflow conveying device 21 and the gas storage tank 10, and the first exhaust pipe 23 is connected between the outlet end of the airflow conveying device 21 and the intake end of the absorption section 31. Specifically, one end of the intake pipe 22 is connected to the inlet end of the airflow conveying device 21, and the other end is connected to the interlayer cavity 13. When the airflow conveying device 21 is powered on, the gas in the interlayer cavity 13 (including the gas originally stored in the interlayer cavity 13 and the leaked gaseous energy storage medium) can be transported to the absorption section 31 through the intake pipe 22 and the first exhaust pipe 23. The airflow conveying device 21 can be, for example, an axial flow fan or a centrifugal fan, or other device that can drive gas flow; this embodiment is not limited to this.

[0052] Alternatively, in some embodiments, the exhaust assembly 20 can be understood as a pipeline connecting the gas storage tank 10 and the absorption section 31, the intake pipe 22 can be understood as the portion of the pipeline closer to the gas storage tank 10, the first exhaust pipe 23 can be understood as the portion of the pipeline closer to the absorption section 31, and the airflow conveying device 21 is the portion between the intake pipe 22 and the first exhaust pipe 23. There may be no clear boundary between the intake pipe 22, the airflow conveying device 21, and the first exhaust pipe 23. When the gas storage tank 10 leaks, the leaking gas, under the pressure of the gas storage tank 10 (the gas pressure already present inside the gas storage tank 10), sequentially enters the absorption section 31 through the intake pipe 22, the airflow conveying device 21, and the first exhaust pipe 23. In this embodiment, once the gas storage tank 10 leaks, the leaking gas can also be discharged to the absorption section 31 through the exhaust assembly 20, allowing for timely capture of the leaking gas.

[0053] Furthermore, refer to Figure 3In the specific embodiment shown, the exhaust assembly 20 further includes a second exhaust pipe 24. One end of the second exhaust pipe 24 is connected to the outlet end of the pneumatic conveying device 21, and the other end is open to the atmosphere. When the leakage of the gaseous energy storage medium exceeds the processing capacity of the absorption section 31, a portion of the gas extracted by the pneumatic conveying device 21 can be discharged to the atmosphere through the second exhaust pipe 24, while the remaining gas enters the absorption section 31 through the first exhaust pipe 23. Alternatively, a portion of the leaked gas can flow by gravity into the absorption section 31 through the first exhaust pipe 23, while the remaining portion flows by gravity to the atmosphere through the second exhaust pipe 24. For example, a valve, such as a solenoid valve, can be installed on the second exhaust pipe 24 to open or close it. For instance, when the leakage is small, the valve can be closed, keeping the second exhaust pipe 24 closed, and all the gas extracted by the pneumatic conveying device 21 enters the absorption section 31 through the first exhaust pipe 23 to react with the absorbent. When the leakage is large, the valve can be opened, keeping the second exhaust pipe 24 open, and a portion of the gas extracted by the pneumatic conveying device 21 can be discharged to the atmosphere through the second exhaust pipe 24, while the remaining portion enters the absorption section 31 through the first exhaust pipe 23.

[0054] For more specific details, please refer to [link / reference]. Figure 1 The gas storage tank 10 has a containment cavity 15 for storing gaseous energy storage medium. When the gas storage tank 10 leaks, the gaseous energy storage medium originally stored in the containment cavity 15 escapes from the containment cavity 15.

[0055] In some embodiments, the gas storage tank 10 specifically includes an inner membrane 11 and a ground membrane 14, with a receiving cavity 15 formed between the inner membrane 11 and the ground membrane 14. In some embodiments, the gas storage tank 10 further includes an outer membrane 12 disposed outside the inner membrane 11, with a sandwich cavity 13 formed between the inner membrane 11 and the outer membrane 12. The sandwich cavity 13 and the receiving cavity 15 are separated by the inner membrane 11. The sandwich cavity 13 generally contains air or other gases, and the air inlet end of the exhaust assembly 20 communicates with the sandwich cavity.

[0056] When the inner membrane 11 is damaged, the gaseous energy storage medium originally stored in the receiving cavity 15 escapes from the receiving cavity 15 into the interlayer cavity 13. The air inlet of the exhaust assembly 20 can be connected to the interlayer cavity 13 to transport the gas in the interlayer cavity 13 to the absorption section 31 when the inner membrane 11 leaks.

[0057] In another embodiment, the air inlet of the exhaust assembly 20 may also be located outside the outer membrane 12. Specifically, the air inlet of the exhaust assembly 20 abuts against the outer membrane, or the air inlet of the exhaust assembly 20 is connected to the outer membrane of the gas storage tank through a flexible material (such as a bag duct or a membrane duct) to transport the gas leaking from the inner membrane 11 to the absorption section 31.

[0058] The above technical solution can more effectively achieve the transportation of leaked gas.

[0059] The gas delivered to the absorption section 31 via the exhaust assembly 20 includes the gaseous energy storage medium leaked from the gas storage tank 10, as well as the original air or other gases in the interlayer cavity 13. The gaseous energy storage medium is captured after reacting with the absorbent in the absorption section 31, and the remaining gas is discharged from the outlet of the absorption section 31.

[0060] In some embodiments, the outlet of the absorption section 31 is connected to the atmosphere, and the remaining gas after absorption is directly discharged into the atmosphere. Alternatively, in other embodiments, the gas storage leak capture system further includes an absorption section exhaust pipe 36, one end of which is connected to the outlet of the absorption section 31, and the other end is connected to the interlayer cavity 13, allowing the remaining gas after absorption to be refilled into the interlayer cavity 13. Two branch pipes can be provided at the outlet of the absorption section 31, one branch pipe being the absorption section exhaust pipe 36, and the other branch pipe being directly connected to the atmosphere. Furthermore, valves, such as solenoid valves, can be installed on the two branch pipes, allowing the remaining gas to be discharged into the atmosphere or refilled into the interlayer cavity 13 by opening and closing the valves.

[0061] Continue to refer to Figure 3 In some embodiments, the gas storage leak capture system further includes a concentration detection unit 50, which is, for example, located within the interlayer cavity 13 to detect the concentration of the gaseous energy storage medium within the interlayer cavity 13. If the gaseous energy storage medium is carbon dioxide gas, then the concentration detection unit 50 is a carbon dioxide detector. By setting up the concentration detection unit 50, it is possible to determine whether there is a leak of gaseous energy storage medium into the interlayer cavity 13 based on the reading of the concentration detection unit 50. Furthermore, there are multiple concentration detection units 50, arranged in a preset manner within the interlayer cavity 13. When the inner membrane 11 is damaged, the concentration of the gaseous energy storage medium near the damaged location within the interlayer cavity 13 increases rapidly, while the concentration change is slower in areas farther from the damaged location. Therefore, by setting up multiple concentration detection units 50, a leak can be determined when the reading of any one of the concentration detection units 50 exceeds a set value, thus enabling more timely detection of gaseous energy storage medium leaks. Furthermore, when there are multiple concentration detection units 50, the exhaust assembly can be arranged around the concentration detection units 50 in a manner corresponding to the number of concentration detection units 50.

[0062] In some embodiments, a concentration detection unit 50 may be installed around the gas storage tank 10. When the outer membrane 12 and the inner membrane 11 are damaged at the same time, the gaseous energy storage medium escapes from the interlayer cavity 13 to the outside of the outer membrane 12. The damage to the outer membrane 12 can be determined by the reading of the concentration detection unit 50 installed around the gas storage tank 10.

[0063] In some embodiments, an exhaust device 41 may be provided to exhaust gas from the gas storage tank 10. The inlet of the exhaust device 41 is connected to the gas storage tank 10 (specifically, to the interlayer cavity 13 or the receiving cavity 15), and the outlet is connected to the atmosphere. When the leakage is large, the exhaust device 41 can be opened to extract the gaseous energy storage medium from the gas storage tank 10 and discharge it into the atmosphere for dilution by the air, thereby reducing safety hazards. The exhaust device 41 may include, for example, a fan and necessary connecting pipes. For example, the outlet of the exhaust device 41 may be set at high altitude to discharge the gaseous energy storage medium at high altitude.

[0064] Alternatively, in some embodiments, an air supply device 42 can be provided, with its inlet end connected to the atmosphere and its outlet end connected to the gas storage tank 10 (specifically, for example, to the interlayer cavity 13). When the leakage is large, the air supply device 42 can be opened to introduce air into the gas storage tank 10 to dilute the gaseous energy storage medium, thereby reducing safety hazards. Of course, the gas storage tank leak gas capture system provided in this embodiment can be equipped with both an exhaust device 41 and an air supply device 42 to achieve better and faster leak handling results.

[0065] Furthermore, refer to Figure 4 The gas storage leak capture system also includes a control module 70, which is electrically connected to the exhaust assembly 20 to control its start and stop. Specifically, the control module 70 is electrically connected to the airflow delivery device 21 in the exhaust assembly 20. For example, when a leak occurs in the gas storage 10, the control module 70 opens the airflow delivery device 21 to extract gas, thereby delivering the leaked gas (including the leaked gaseous energy storage medium) to the absorption section 31. Alternatively, as described in the previous embodiments, if a solenoid valve is also installed on the second exhaust pipe 24, the control module 70 can also be electrically connected to the solenoid valve, controlling it to open so that some gas can be discharged from the second exhaust pipe 24 to the atmosphere, and some gas enters the absorption section 31. Controlling the solenoid valve to close ensures that all gas extracted by the airflow delivery device 21 enters the absorption section 31.

[0066] Furthermore, the control module 70 can also be electrically connected to the concentration detection unit 50 to receive the concentration signal fed back by the concentration detection unit 50 and determine whether a leak has occurred based on the concentration signal.

[0067] Furthermore, the control module 70 can determine the level of leakage based on the concentration signal fed back by the concentration detection unit 50, and select the equipment to be activated from the exhaust assembly 20, the air supply device 42 and the exhaust device 41 according to different leakage levels.

[0068] The control module 70 includes, but is not limited to, a central processing unit, a readable storage medium, a controller, a PLC controller, and other functional components that can achieve control effects; this embodiment does not impose any limitations on these components.

[0069] In some embodiments, the gas storage leak capture system can also capture the gaseous energy storage medium leaking from the gas storage 10 via an absorbent spraying device 60. This gas storage leak capture system includes an absorbent spraying device 60, which is located around the gas storage 10. The absorbent spraying device 60 can store absorbent or be connected to an external absorbent. For example, the absorbent spraying device 60 has a storage tank for storing absorbent; or, for example, when the gas storage leak capture system also includes an absorbent storage structure 34, the absorbent spraying device 60 can be connected to the absorbent storage structure 34, with the absorbent storage structure 34 providing absorbent to the absorbent spraying device 60. The absorbent spraying device 60 is used to spray absorbent around the gas storage 10 to absorb the gaseous energy storage medium leaking from the gas storage 10 and generate a reaction liquid. The regeneration unit 32 is also used to collect the absorbent sprayed by the absorbent spraying device 60, that is, the regeneration unit 32 is also used to collect the reaction liquid generated by the reaction between the gaseous energy storage medium and the absorbent. The absorbent spraying device 60 can be, for example, a fog cannon or a sprayer, which atomizes the absorbent and sprays it out. Of course, in some embodiments, the absorbent spraying device 60 can also use a liquid pump + nozzle spraying system to spray the absorbent. This embodiment does not limit the specific form or number of the absorbent spraying device 60. Furthermore, the number of absorbent spraying devices 60 can correspond to the number of concentration detection units 50.

[0070] When the outer membrane 12 and the inner membrane 11 are damaged simultaneously, the gaseous energy storage medium escapes from the interlayer cavity 13 to the outside of the outer membrane 12. The absorbent sprayed by the absorbent spraying device 60 can absorb the gaseous energy storage medium that has escaped to the outside of the outer membrane 12. A water collection ditch or the like can be set up around the gas storage tank 10 to guide and collect the absorbent sprayed by the absorbent spraying device 60 (or the reaction liquid generated by the reaction between the gaseous energy storage medium and the absorbent). Finally, the gaseous energy storage medium can be regenerated in the regeneration unit 32.

[0071] Furthermore, the control module 70 can also be electrically connected to the absorbent spraying device 60, the air supply device 42, and the exhaust device 41 to control the start and stop of the absorbent spraying device 60, the air supply device 42, and the exhaust device 41.

[0072] Furthermore, the control module 70 can determine the level of leakage based on the concentration signal fed back by the concentration detection unit 50, and select the equipment to be activated from the exhaust assembly 20, absorbent spraying device 60, air supply device 42 and exhaust device 41 according to different leakage levels.

[0073] The operating principle of the gas storage leak capture system provided in this embodiment of the invention will be explained below with reference to a specific example.

[0074] During normal operation, the gas storage chamber 10 contains a gaseous energy storage medium, specifically carbon dioxide gas, within its containment cavity 15. The interlayer cavity 13 contains air. When the inner membrane 11 is damaged, the concentration detection unit 50, located within the interlayer cavity 13, detects that the carbon dioxide concentration has reached a first threshold and sends a first concentration signal to the control module 70. The control module 70, based on the first concentration signal, determines that the inner membrane 11 is leaking and controls the exhaust assembly 20 to draw the leaked gas from the interlayer cavity 13 into the absorption section 31. The absorbent storage structure 34 provides absorbent to the absorption section 31, causing the carbon dioxide in the leaked gas to react with the absorbent. The reaction produces a reaction liquid, which enters the regeneration section 32 for regeneration. Gases that cannot react are discharged to the atmosphere or returned to the interlayer cavity 13 through the outlet of the absorption section 31. The reaction liquid entering the regeneration section 32 absorbs residual heat and regenerates carbon dioxide gas, which is collected in the working fluid recovery container 33. After carbon dioxide gas is regenerated, the remaining absorbent in the reaction liquid is recovered to the absorbent storage structure 34 via the absorbent recovery pipeline 35 to achieve the recycling of the absorbent.

[0075] If the concentration detection unit 50 detects that the carbon dioxide concentration reaches the second threshold (the second threshold is greater than the first threshold), it sends a second concentration signal to the control module 70. The control module 70 determines that the inner membrane 11 has leaked and the leak is relatively serious based on the second concentration signal. The control module 70 controls the exhaust assembly 20 to start and also controls the exhaust device 41 and / or the air supply device 42 to start, so as to dilute the carbon dioxide in the gas storage tank 10 and reduce safety hazards.

[0076] Alternatively, when both the outer membrane 12 and the inner membrane 11 leak, the control module 70 controls the exhaust assembly 20 to start and also controls the absorbent spraying device 60 to start. The absorbent spraying device 60 sprays absorbent to absorb the carbon dioxide that has leaked outside the outer membrane 12. The reaction liquid generated by the reaction between the absorbent spraying device 60 and the gaseous energy storage medium is also collected in the regeneration section 32 for regeneration treatment.

[0077] When the reading of the concentration detection unit 50 is lower than the first threshold, the control module 70 can control the exhaust assembly 20, the air supply device 42, the ventilation device 41, and the absorbent spraying device 60 to stop operating. Repairs are then performed on the gas storage tank 10. After repairs are completed, the carbon dioxide stored in the working fluid recovery container 33 can be filled into the containing cavity 15, and the gas storage tank 10 can resume normal operation.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gas leakage capture system for a gas storage facility, characterized in that, include: An exhaust assembly is connected to the gas storage tank and is used to exhaust the gaseous energy storage medium that leaks from the gas storage tank. The gas storage tank includes an inner membrane and an outer membrane, with a sandwich cavity formed between the inner and outer membranes; the exhaust assembly is connected to the sandwich cavity; the exhaust assembly includes a first exhaust pipe, a pneumatic conveying device, and a second exhaust pipe, the pneumatic conveying device being used to transport the gaseous energy storage medium leaking from the gas storage tank, the pneumatic conveying device having an inlet end and an outlet end; one end of the second exhaust pipe is connected to the outlet end of the pneumatic conveying device, and the other end is connected to the atmosphere; The absorption section is provided with the first exhaust pipe connected between the outlet end of the gas delivery device and the absorption section; the absorption section is provided with an absorbent or an absorbent is connected to the outside of the absorption section; the gaseous energy storage medium leaking from the gas storage tank can react with the absorbent to generate a reaction liquid; A regeneration unit is connected to the absorption unit; the regeneration unit is used to receive the reaction liquid output by the absorption unit; the regeneration unit regenerates the reaction liquid to generate the gaseous energy storage medium; and the regeneration unit regenerates the reaction liquid to generate the absorbent. An exhaust pipe for the absorption section, one end of which is connected to the outlet end of the absorption section and the other end of which is connected to the interlayer cavity, so that the remaining gas after absorption is returned to the interlayer cavity. A first concentration detection unit is disposed within the interlayer cavity; the first concentration detection unit is used to detect the concentration of the gaseous energy storage working fluid within the interlayer cavity; A control module is electrically connected to the exhaust assembly. The control module determines the leakage level based on the concentration signal fed back by the first concentration detection unit, and controls the second exhaust pipe to switch between an open and closed state according to different leakage levels. The leakage levels include a first level and a second level. In the first level, the second exhaust pipe is in a closed state, and all the gas extracted by the pneumatic conveying device enters the absorption section through the first exhaust pipe to react with the absorbent. In the second level, the second exhaust pipe is in an open state, and part of the gas extracted by the pneumatic conveying device is discharged to the atmosphere through the second exhaust pipe, while the other part enters the absorption section through the first exhaust pipe. The leakage amount in the second level is greater than that in the first level.

2. The gas storage leak capture system as described in claim 1, characterized in that, It also includes a working fluid recovery container, which is connected to the regeneration unit; the working fluid recovery container is used to receive the gaseous energy storage working fluid generated by the regeneration process.

3. The gas storage leak capture system as described in claim 1, characterized in that, Also includes: An absorbent storage structure is provided, which is connected to the absorption section; the absorbent storage structure is used to provide the absorbent to the absorption section.

4. The gas storage leak capture system as described in claim 3, characterized in that, It also includes an absorbent recovery pipeline, which is connected between the absorbent storage structure and the regeneration unit; the absorbent recovery pipeline is used to transport the absorbent generated by the regeneration process into the absorbent storage structure.

5. The gas storage leak capture system as described in claim 1, characterized in that, The exhaust assembly also includes: An air intake pipe is connected between the inlet end of the airflow conveying device and the air storage tank.

6. The gas storage leak capture system as described in claim 1, characterized in that, The outlet of the absorption section is connected to the atmosphere.

7. The gas storage leak capture system as described in claim 1, characterized in that, Also includes: An exhaust ventilation device, wherein the inlet end of the exhaust ventilation device is connected to the gas storage tank, and the outlet end of the exhaust ventilation device is connected to the atmosphere; And / or, an air supply device, the inlet of which is connected to the atmosphere, and the outlet of which is connected to the gas storage tank.

8. The gas storage leak capture system as described in any one of claims 1 to 7, characterized in that, Also includes: An absorbent spraying device is installed around the gas storage tank; the absorbent spraying device stores absorbent or is connected to an absorbent. The absorbent spraying device is used to spray absorbent around the gas storage tank to absorb the gaseous energy storage medium leaking from the gas storage tank and form a reaction liquid; A second concentration detection unit is installed around the gas storage tank. The control module is electrically connected to the second concentration detection unit and the absorbent spraying device. The gas storage tank includes an inner membrane and an outer membrane. The control module determines the damage condition of the outer membrane based on the reading of the second concentration detection unit, so as to control the start of the absorbent spraying device when both the inner membrane and the outer membrane leak.

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