Residual gas recovery structure of hydrogen storage well
By employing a dual sealing mechanism and hydrogen concentration monitoring in the hydrogen storage well, the problems of residual gas leakage and lack of monitoring in the hydrogen storage well have been solved, achieving efficient residual gas recovery and safety monitoring.
Patent Information
- Application Number
- CN202520600052.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-04-01
AI Technical Summary
In existing hydrogen storage well residual gas recovery structures, the cement caps are not sufficiently sealed, posing a risk of residual gas leakage, and there is no hydrogen concentration monitoring structure deep inside the well.
A dual sealing mechanism is adopted, including a seal formed by a rubber column and a rock salt layer combined with liquid concrete. A hydrogen concentration monitor is used to monitor the hydrogen concentration inside and outside the well, and a vacuum pump is used to extract the residual gas.
It achieves double sealing, reduces residual gas leakage, ensures wellhead sealing effect, and can monitor hydrogen concentration inside and outside the well in real time, thus improving safety.
Smart Images
Figure CN223795066U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydrogen storage well technology, specifically to a structure for recovering residual gas from a hydrogen storage well. Background Technology
[0002] A hydrogen storage well is a hydrogen storage facility buried about 150 meters underground and made of special materials. It has the characteristics of high safety factor and small footprint, with its footprint being only one-tenth of the commonly used above-ground hydrogen storage equipment. However, hydrogen storage wells will always have residual gas leakage, so various residual gas recovery structures have emerged, such as a hydrogen storage well residual gas recovery structure.
[0003] Currently, existing hydrogen storage well residual gas recovery structures on the market use vacuum pumps to extract residual hydrogen gas. These structures typically consist of a vacuum pump, a venting pipe, and a cement cap. The venting pipe is inserted into the hydrogen storage well, the wellhead is sealed with a cement cap, and finally, the vacuum pump extracts the remaining hydrogen gas through the venting pipe. However, sealing the wellhead with a cement cap is not sufficiently airtight, posing a risk of residual gas leakage. Furthermore, there is no monitoring structure deep within the well. Therefore, a hydrogen storage well residual gas recovery structure that can double-seal the wellhead, providing a better sealing effect, and can monitor the hydrogen concentration inside the well is proposed. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a residual gas recovery structure for hydrogen storage wells. It has the advantages of double sealing of the wellhead to reduce residual gas leakage and monitoring and comparing the hydrogen concentration inside the well and at the wellhead. It solves the problems of insufficient sealing when using cement caps to seal the wellhead, the risk of residual gas leakage, and the lack of monitoring structures deep inside the well.
[0005] To achieve the above-mentioned purpose of double sealing of the wellhead to reduce residual gas leakage and monitoring and comparing the hydrogen concentration inside the well and at the wellhead, this utility model provides the following technical solution: a hydrogen storage well residual gas recovery structure, including a hydrogen storage well body and a buried cement column, wherein a sealing mechanism is provided inside the buried cement column;
[0006] The sealing mechanism includes a support plate, a clamping plate, a marble slab, a rubber column, an extraction pipe, a rock salt layer, a partition, and liquid concrete. Two support plates are fixedly installed inside the buried cement column. A clamping plate is fixedly installed on the top of each of the two support plates. A marble slab is placed on top of each clamping plate. A rubber column is installed inside the marble slab. An extraction pipe is installed inside the rubber column. A rock salt layer is installed inside the buried cement column. Two partitions are fixedly installed inside the buried cement column. Liquid concrete is placed inside the buried cement column.
[0007] Furthermore, a sealing box is fixedly installed on the top of the buried cement pillar, and a hydrogen concentration monitor is installed on the outside of the sealing box.
[0008] Furthermore, a bend is fixedly connected to the top of the extraction pipe, and a control valve is provided on the outside of the bend.
[0009] Furthermore, a vacuum pump is fixedly connected to the right side of the bend, and an air outlet pipe is provided on the top of the vacuum pump.
[0010] Furthermore, the buried cement column is provided with an air inlet inside, and a thin tube connected to the buried cement column is provided on the outside of the buried cement column.
[0011] Furthermore, a humidity sensor is installed inside the buried cement pillar, and a wireless controller is installed on the top of the buried cement pillar.
[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0013] This hydrogen storage well residual gas recovery structure employs a sealing mechanism. When residual gas needs to be recovered, the top of the buried cement column hydrogen storage well body is placed, and the extraction pipe is inserted into the well body along the buried cement column. A marble slab is then placed on a clamping plate and secured. A rubber column is fitted over the extraction pipe and works in conjunction with the marble slab to form the first layer of seal. A rock salt layer is then formed on top of the marble slab through a partition, which effectively prevents hydrogen leakage. Liquid concrete is then used to fill the buried cement column to form the second layer of seal. A hydrogen concentration monitor simultaneously monitors the hydrogen concentration inside the sealed box and the buried cement column. A vacuum pump extracts the residual hydrogen gas. This sealing mechanism can double-seal the wellhead to reduce residual gas leakage and monitor and compare the hydrogen concentration inside the well and at the wellhead. Attached Figure Description
[0014] Figure 1 This is a three-dimensional view of the structure of this utility model;
[0015] Figure 2 This is a front sectional view of the structure of this utility model;
[0016] Figure 3 The structure of this utility model Figure 2 Enlarged view of point A in the middle;
[0017] Figure 4 This is a partial perspective view of the structure of this utility model.
[0018] In the diagram: 1. Hydrogen storage well body; 2. Buried cement column; 3. Sealing mechanism; 301. Support plate; 302. Clamping plate; 303. Marble slab; 304. Rubber column; 305. Extraction pipe; 306. Rock salt layer; 307. Partition plate; 308. Liquid concrete; 4. Sealing box; 5. Hydrogen concentration monitor; 6. Bend; 7. Control valve; 8. Vacuum pump; 9. Gas outlet pipe; 10. Gas interface; 11. Thin tube; 12. Humidity sensor; 13. Wireless controller. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-4 The residual gas recovery structure of a hydrogen storage well in this embodiment includes a hydrogen storage well body 1 and a buried cement column 2, and a sealing mechanism 3 is provided inside the buried cement column 2.
[0021] The sealing mechanism 3 includes a support plate 301, a clamping plate 302, a marble slab 303, a rubber column 304, an extraction pipe 305, a rock salt layer 306, a partition plate 307, and liquid concrete 308. Two support plates 301 are fixedly installed inside the buried cement column 2. A clamping plate 302 is fixedly installed on the top of each of the two support plates 301. A marble slab 303 is set on the top of the two clamping plates 302. A rubber column 304 is set inside the marble slab 303. An extraction pipe 305 is set inside the rubber column 304. A rock salt layer 306 is set inside the buried cement column 2. Two partition plates 307 are fixedly installed inside the buried cement column 2. Liquid concrete 308 is set inside the buried cement column 2.
[0022] In the case implementation, a sealing box 4 is fixedly installed on the top of the buried cement column 2, and a hydrogen concentration monitor 5 is installed on the outside of the sealing box 4. By setting the sealing box 4, the hydrogen concentration monitor 5 can monitor the hydrogen concentration inside the sealing box 4.
[0023] In the case implementation, the buried cement column 2 is equipped with an internal gas interface 10, and the buried cement column 2 is equipped with a thin tube 11 connected to the outside of the buried cement column 2. The thin tube 11 is connected to the hydrogen concentration monitor 5, so that the hydrogen concentration monitor 5 can compare and monitor the hydrogen concentration at the wellhead and inside the well.
[0024] In the implementation of the case, a humidity sensor 12 is installed inside the buried cement column 2, and a wireless controller 13 is installed on the top of the buried cement column 2. The wireless controller 13 is wirelessly connected to an external wireless terminal. The wireless controller 13 is electrically connected to all electronic components in this patent through wires, so that the wireless controller 13 can be wirelessly connected by operating the external wireless terminal, and then all electronic components in this patent can be controlled.
[0025] When implementing this procedure, please follow these steps:
[0026] 1) When it is necessary to recover the residual gas of the hydrogen storage well, first place the top of the buried cement column 2 hydrogen storage well body 1, and put the gas extraction pipe 305 into the hydrogen storage well body 1 along the buried cement column 2.
[0027] 2) Then place the marble slab 303 on the clamping plate 302 and clamp it in place. Use the rubber column 304 to cover the outside of the suction pipe 305 and cooperate with the marble slab 303 to form the first seal.
[0028] 3) Then, a rock salt layer 306 is formed on the top of the rock salt marble slab 303 through the partition 307. The rock salt can effectively prevent hydrogen leakage. Then, liquid concrete 308 is used to fill the buried cement column 2 to form a second seal.
[0029] 4) Finally, the hydrogen concentration in the sealed box 4 and the buried cement column 2 are monitored simultaneously by the hydrogen concentration monitor 5, and the residual hydrogen is extracted by the vacuum pump 8.
[0030] In summary, this hydrogen storage well residual gas recovery structure, through the setting of a sealing mechanism 3, when it is necessary to recover residual gas from the hydrogen storage well, places the buried cement column 2 on top of the hydrogen storage well body 1, and inserts the extraction pipe 305 along the buried cement column 2 into the hydrogen storage well body 1. Then, a marble slab 303 is placed on the clamping plate 302 to hold it in place. A rubber column 304 is used to fit the outside of the extraction pipe 305 and cooperate with the marble slab 303 to form the first layer of seal. Then, a rock salt layer 306 is formed on top of the rock salt marble slab 303 through a partition 307. The rock salt can effectively prevent hydrogen leakage. Then, liquid concrete 308 is used to fill the buried cement column 2 to form the second layer of seal. The hydrogen concentration is monitored simultaneously in the sealed box 4 and the buried cement column 2 by a hydrogen concentration monitor 5. The residual hydrogen gas is extracted by a vacuum pump 8. This sealing mechanism 3 can double seal the wellhead to reduce residual gas leakage and monitor and compare the hydrogen concentration inside the well and at the wellhead.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A residual gas recovery structure for a hydrogen storage well, comprising a hydrogen storage well body (1) and a buried cement column (2), characterized in that: The buried cement column (2) is equipped with a sealing mechanism (3); The sealing mechanism (3) includes a support plate (301), a clamping plate (302), a marble slab (303), a rubber column (304), an air extraction pipe (305), a rock salt layer (306), a partition plate (307), and liquid concrete (308). Two support plates (301) are fixedly installed inside the buried cement column (2). A clamping plate (302) is fixedly installed on the top of each of the two support plates (301). A marble slab (303) is provided on the top of each of the two clamping plates (302). A rubber column (304) is provided inside the marble slab (303). An air extraction pipe (305) is provided inside the rubber column (304). A rock salt layer (306) is provided inside the buried cement column (2). Two partition plates (307) are fixedly installed inside the buried cement column (2). Liquid concrete (308) is provided inside the buried cement column (2).
2. The residual gas recovery structure for hydrogen storage wells according to claim 1, characterized in that: A sealing box (4) is fixedly installed on the top of the buried cement column (2), and a hydrogen concentration monitor (5) is installed on the outside of the sealing box (4).
3. The residual gas recovery structure for hydrogen storage wells according to claim 1, characterized in that: The top of the extraction pipe (305) is fixedly connected to a bend (6), and a control valve (7) is provided on the outside of the bend (6).
4. The residual gas recovery structure for a hydrogen storage well according to claim 3, characterized in that: A vacuum pump (8) is fixedly connected to the right side of the bend (6), and an exhaust pipe (9) is provided on the top of the vacuum pump (8).
5. The residual gas recovery structure for hydrogen storage wells according to claim 1, characterized in that: The buried cement column (2) is provided with an air inlet (10) inside, and a thin tube (11) connected to the buried cement column (2) is provided on the outside of the buried cement column (2).
6. The residual gas recovery structure for hydrogen storage wells according to claim 1, characterized in that: A humidity sensor (12) is installed inside the buried cement column (2), and a wireless controller (13) is installed on the top of the buried cement column (2).