Online monitoring and stable operation system for hydrogen storage well

Abstract

The utility model discloses an online monitoring and stable operation system for a hydrogen storage well, and relates to the technical field of hydrogen storage wells. Comprising a reinforced concrete layer and a gas storage mechanism arranged on the reinforced concrete layer, the gas storage mechanism comprises an outer-layer sleeve, a hydrogen-contacting sleeve, a well mouth device, a well bottom device and a leakage-proof component, the outer-layer sleeve is fixedly arranged at the bottom of the outer wall of the reinforced concrete layer, and the hydrogen-contacting sleeve is fixedly embedded in the top of the outer wall of the reinforced concrete layer; the wellhead device is installed on the top of the outer wall of the hydrogen-contacting casing pipe. According to the online monitoring and stable operation system for the hydrogen storage well, through mutual cooperation of the outer-layer casing pipe, the hydrogen-contacting casing pipe, the well mouth device, the well bottom device, the leakage-proof component and the detection mechanism, real-time monitoring and stable operation of the high-pressure hydrogen storage well in the safe operation process are achieved, and the safe operation problem of the hydrogen storage well with the higher pressure grade is solved; the underground hydrogen storage system which is high in safety and small in occupied area is provided for construction of a hydrogen refueling station.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen storage well technology, specifically to an online monitoring and stable operation system for hydrogen storage wells. Background Technology

[0002] With the increasing global demand for clean energy, hydrogen energy, as an efficient and clean energy carrier, is gradually becoming an important direction for energy transformation. As a key link in the hydrogen energy industry chain, the number of hydrogen refueling stations is constantly increasing to meet the refueling needs of hydrogen energy application equipment such as hydrogen fuel cell vehicles. However, traditional ground-mounted wound hydrogen storage containers have exposed many drawbacks in the application of hydrogen refueling stations, such as large land area and high safety hazards, which limit the layout and development of hydrogen refueling stations. Ground-mounted hydrogen storage containers not only occupy valuable land resources, but also pose a serious threat to the surrounding environment and personnel safety in the event of a leak or other safety accident because they are exposed to the external environment.

[0003] Hydrogen storage wells have emerged as a new type of hydrogen storage method. These wells are designed to be vertically buried underground, utilizing the geological strata to provide a natural barrier. Only the wellhead equipment is retained on the surface, reducing the footprint and safety hazards. As the refueling pressure of hydrogen refueling stations increases, higher requirements are placed on the storage pressure of hydrogen storage wells. However, the safety risks brought about by high-pressure hydrogen storage also increase, such as hydrogen leakage and abnormal pressure. These problems can affect the safe operation of the storage wells. Utility Model Content

[0004] This invention provides an online monitoring and stable operation system for hydrogen storage wells. Through the coordinated operation of the outer casing, hydrogen-contained casing, wellhead device, bottom hole device, leak-proof components, and detection mechanism, it achieves real-time monitoring and stable operation of high-pressure hydrogen storage wells during use. This solves the safety operation problem of hydrogen storage wells with higher pressure levels, providing a highly safe and compact underground hydrogen storage system for the construction of hydrogen refueling stations. The detection mechanism can promptly detect abnormalities during the operation of the hydrogen storage well and alert operators to take appropriate measures via alarm signals. If hydrogen leakage is within a safe and controllable range, it can be safely vented by connecting the collection pipe to the venting main. This prevents accidents and ensures the long-term stable operation of the hydrogen storage well.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an online monitoring and stable operation system for hydrogen storage wells, comprising:

[0006] Reinforced concrete layer;

[0007] A gas storage mechanism is installed on a reinforced concrete layer. The gas storage mechanism includes an outer casing, a hydrogen-containing casing, a wellhead device, a bottom hole device, and a leak-proof component. The outer casing is fixedly installed at the bottom of the outer wall of the reinforced concrete layer. The hydrogen-containing casing is fixedly embedded at the top of the outer wall of the reinforced concrete layer. The wellhead device is installed at the top of the outer wall of the hydrogen-containing casing. The bottom hole device is installed at the bottom of the outer wall of the hydrogen-containing casing. The leak-proof component is located inside the outer casing.

[0008] The testing facility is located on the wellhead device.

[0009] Furthermore, the leak-proof component includes a collection pipe and a sealing assembly. The collection pipe is fixedly embedded in the top of the outer wall of the reinforced concrete layer, and the bottom end of the collection pipe is located in the annular space between the hydrogen-contained sleeve and the outer sleeve. The sealing assembly is disposed on the outer sleeve.

[0010] Furthermore, the sealing assembly includes a first cement ring and a second cement ring, the first cement ring being fixedly sleeved on the outer wall of the outer sleeve, and the second cement ring being fixedly sleeved on the outer wall of the hydrogen-contaminated sleeve.

[0011] Furthermore, the detection mechanism includes a hydrogen concentration sensor and a casing detection component. The hydrogen concentration sensor is fixedly installed on the top of the collection pipe, and the casing detection component is installed at the wellhead device.

[0012] Furthermore, the casing detection component includes a pressure sensor and a temperature sensor, with the pressure sensor fixedly installed at the interface of the wellhead device and the temperature sensor fixedly installed at the interface of the wellhead device.

[0013] Furthermore, a sealing layer is fixedly provided on the inner wall of the outer sleeve near the top edge, and the hydrogen-resistant sleeve penetrates through the top of the outer wall of the sealing layer.

[0014] This invention provides an online monitoring and stable operation system for hydrogen storage wells. It features the following:

[0015] Beneficial effects:

[0016] (1) The online monitoring and stable operation system for hydrogen storage wells, through the cooperation of outer casing, hydrogen-adjacent casing, wellhead device, well bottom device, leak prevention components and detection mechanism, realizes real-time monitoring and stable operation of high-pressure hydrogen storage wells in use, solves the problem of safe operation of hydrogen storage wells with higher pressure levels, and provides a highly safe and small-area underground hydrogen storage system for the construction of hydrogen refueling stations.

[0017] (2) The online monitoring and stable operation system for the hydrogen storage well, through the detection mechanism, can promptly detect abnormalities during the operation of the hydrogen storage well and remind operators to take corresponding measures through alarm signals. If hydrogen leakage is within a safe and controllable range, it can be safely vented by connecting the collection pipe to the venting main pipe. This avoids accidents and ensures the long-term stable operation of the hydrogen storage well. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram: 1. Reinforced concrete layer; 2. Sealing layer; 3. Outer casing; 4. Hydrogen-containing casing; 5. Wellhead device; 6. Bottom hole device; 7. Collection pipe; 8. First cement sheath; 9. Second cement sheath; 10. Hydrogen concentration sensor; 11. Pressure sensor; 12. Temperature sensor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figure 1 This utility model provides a technical solution: an online monitoring and stable operation system for hydrogen storage wells, comprising:

[0022] Reinforced concrete layer 1;

[0023] The gas storage mechanism is located on the reinforced concrete layer 1. The gas storage mechanism includes an outer casing 3, a hydrogen-containing casing 4, a wellhead device 5, a bottom hole device 6, and a leak-proof component. The outer casing 3 is fixedly installed at the bottom of the outer wall of the reinforced concrete layer 1. The hydrogen-containing casing 4 is fixedly embedded at the top of the outer wall of the reinforced concrete layer 1. The wellhead device 5 is installed at the top of the outer wall of the hydrogen-containing casing 4. The bottom hole device 6 is installed at the bottom of the outer wall of the hydrogen-containing casing 4. The leak-proof component is located inside the outer casing 3.

[0024] The testing facility is located on hydrogen-containing sleeve 4.

[0025] In this implementation plan: A hydrogen storage well is formed by the gas storage mechanism on the reinforced concrete layer 1. The hydrogen storage well is vertically buried underground and enclosed by the strata. The surface portion consists only of the wellhead device 5, minimizing safety hazards and occupying a small area. The hydrogen-containment casing 4 is located inside the outer casing 3 and is in direct contact with the hydrogen, used for storing and transporting hydrogen. The material of the hydrogen-containment casing 4 has high strength and high pressure resistance, effectively sealing high-pressure hydrogen and providing the main strength to ensure the safe storage of hydrogen in the storage well. The outer casing 3 provides outer protection, preventing external factors from affecting the interior of the storage well. The wellhead device 5 is located at the hydrogen storage well. At the wellhead, there are wellhead flanges, sealing gaskets, and safety valves. The wellhead flanges are used to connect to external pipelines to enable hydrogen injection and extraction. The sealing gaskets ensure the sealing of the connection to prevent hydrogen leakage. The safety valve automatically opens when the internal pressure of the hydrogen storage well exceeds a set value to release excess pressure and ensure the safety of the storage well. The bottom device 6 provides support and fixation for the hydrogen casing 4 and plays a sealing role through leak-proof components. The detection mechanism can detect the hydrogen storage well and monitor parameters such as hydrogen concentration, pressure, and temperature in real time, promptly detect abnormalities and issue alarms, so that operators can take measures to ensure the stable operation of the storage well.

[0026] Specifically, the leak-proof components include a collection pipe 7 and a sealing assembly. The collection pipe 7 is fixedly embedded in the top of the outer wall of the reinforced concrete layer 1, and the bottom end of the collection pipe 7 is located in the annular space between the hydrogen-contained sleeve 4 and the outer sleeve 3. The sealing assembly is located on the outer sleeve 3.

[0027] In this embodiment: when hydrogen leakage occurs, the leaked hydrogen will enter the annular space through the collection pipe 7 and be collected by the collection pipe 7 to prevent hydrogen from spreading to the external environment. The sealing component provides sealing protection.

[0028] Specifically, the sealing assembly includes a first cement ring 8 and a second cement ring 9. The first cement ring 8 is fixedly sleeved on the outer wall of the outer sleeve 3, and the second cement ring 9 is fixedly sleeved on the outer wall of the hydrogen-contaminated sleeve 4.

[0029] In this embodiment: the first cement ring 8 and the second cement ring 9 are filled between the outer casing 3 and the surrounding strata. Through the solidification of cement, the outer casing 3 is fixed in the strata and at the same time plays a sealing role to prevent external substances such as groundwater from entering the gas storage well.

[0030] Specifically, the detection mechanism includes a hydrogen concentration sensor 10 and a casing detection component. The hydrogen concentration sensor 10 is fixedly installed on the top of the collection pipe 7, and the casing detection component is installed at the wellhead device.

[0031] In this embodiment, a hydrogen concentration sensor 10 is used to monitor the hydrogen concentration in the collection tube 7 in real time. When the hydrogen concentration exceeds the set threshold, an alarm signal is issued in a timely manner to remind the operator to take appropriate measures.

[0032] Specifically, the casing detection component includes a pressure sensor 11 and a temperature sensor 12. The pressure sensor 11 is fixedly installed at the wellhead device interface, and the temperature sensor 12 is fixedly installed at the wellhead device interface.

[0033] In this embodiment: pressure sensor 11 is used to monitor pressure changes inside the gas storage well, and temperature sensor 12 is used to monitor temperature changes inside the gas storage well. By monitoring pressure and temperature in real time, abnormal conditions inside the gas storage well can be detected in a timely manner, ensuring the safe operation of the gas storage well.

[0034] Specifically, a sealing layer 2 is fixedly installed on the inner wall of the outer sleeve 3 near the top edge, and the hydrogen-contained sleeve 4 penetrates the top of the outer wall of the sealing layer 2.

[0035] In this embodiment: the sealing layer 2 further enhances the sealing between the hydrogen-container sleeve 4 and the outer sleeve 3, preventing hydrogen leakage and collecting hydrogen to connect to the venting main to achieve safe venting.

[0036] When hydrogen refueling stations need to store hydrogen, hydrogen is injected into the hydrogen storage well's casing 4 through the wellhead device 5. During hydrogen storage, the detection mechanism monitors various operating parameters of the hydrogen storage well in real time. The hydrogen concentration sensor 10 monitors the hydrogen concentration in the collection pipe 7 in real time. When the hydrogen concentration exceeds the set threshold, an alarm signal is issued in a timely manner to remind the operator to take appropriate measures. The pressure sensor 11 monitors the pressure changes inside the storage well, and the temperature sensor 12 monitors the temperature changes inside the storage well. The operator can take timely measures based on the alarm information, such as adjusting the hydrogen injection rate and checking the safety valve, to ensure the safe and stable operation of the hydrogen storage well.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An online monitoring and stable operation system for hydrogen storage wells, characterized in that, include: Reinforced concrete layer (1); A gas storage mechanism is installed on a reinforced concrete layer (1). The gas storage mechanism includes an outer casing (3), a hydrogen-containing casing (4), a wellhead device (5), a bottom hole device (6), and a leak-proof component. The outer casing (3) is fixedly installed at the bottom of the outer wall of the reinforced concrete layer (1). The hydrogen-containing casing (4) is fixedly embedded at the top of the outer wall of the reinforced concrete layer (1). The wellhead device (5) is installed at the top of the outer wall of the hydrogen-containing casing (4). The bottom hole device (6) is installed at the bottom of the outer wall of the hydrogen-containing casing (4). The leak-proof component is installed inside the outer casing (3). The testing facility is located on the hydrogen-containing sleeve (4).

2. The online monitoring and stable operation system for hydrogen storage wells according to claim 1, characterized in that: The leak-proof component includes a collection pipe (7) and a sealing assembly. The collection pipe (7) is fixedly embedded in the top of the outer wall of the reinforced concrete layer (1), and the bottom end of the collection pipe (7) is located in the annular space between the hydrogen-contained sleeve (4) and the outer sleeve (3). The sealing assembly is located on the outer sleeve (3).

3. The online monitoring and stable operation system for hydrogen storage wells according to claim 2, characterized in that: The sealing assembly includes a first cement ring (8) and a second cement ring (9). The first cement ring (8) is fixedly sleeved on the outer wall of the outer sleeve (3), and the second cement ring (9) is fixedly sleeved on the outer wall of the hydrogen-contaminated sleeve (4).

4. The online monitoring and stable operation system for hydrogen storage wells according to claim 3, characterized in that: The detection mechanism includes a hydrogen concentration sensor (10) and a casing detection component. The hydrogen concentration sensor (10) is fixedly installed on the top of the collection pipe (7), and the casing detection component is installed on the wellhead device (5).

5. The online monitoring and stable operation system for hydrogen storage wells according to claim 4, characterized in that: The casing detection component includes a pressure sensor (11) and a temperature sensor (12). The pressure sensor (11) is fixedly installed at the interface of the wellhead device (5), and the temperature sensor (12) is fixedly installed at the interface of the wellhead device (5).

6. The online monitoring and stable operation system for hydrogen storage wells according to claim 5, characterized in that: A sealing layer (2) is fixedly provided on the inner wall of the outer sleeve (3) near the top edge, and the hydrogen-proof sleeve (4) penetrates the top of the outer wall of the sealing layer (2).

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