Artificial underground gas storage system for compressed air energy storage power station and construction method

Abstract

The artificial underground gas storage system for the compressed air energy storage power station comprises a traffic inclined shaft, one end of the traffic inclined shaft penetrates through the ground, the other end of the traffic inclined shaft is connected with an arc-shaped connecting section, the other end of the arc-shaped connecting section is connected with a gas storage unit, the gas storage unit is connected with a traffic vertical shaft, and the other end of the traffic vertical shaft penetrates through the ground. And a gas conveying unit is arranged in the traffic shaft and is communicated with the gas storage unit. The invention further discloses a construction method of the artificial underground gas storage system for the compressed air energy storage power station. According to the artificial underground gas storage system for the compressed air energy storage power station and the construction method, the problem that the application range of compressed air energy storage is limited due to the fact that an existing underground gas storage technology mainly utilizes a salt cavern and a waste mine cave for transformation is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground structure engineering, and specifically relates to an artificial underground gas storage system for a compressed air energy storage power station, and also relates to a construction method of an artificial underground gas storage system for a compressed air energy storage power station. Background Art

[0002] Compressed air energy storage is regarded as a physical energy storage technology with development potential. It has the characteristics of large scale, low cost, long life, and environmental friendliness. It also involves the storage and conversion of multiple energy forms such as cold, heat, and electricity, which facilitates the coupling of various thermal systems, thereby improving the flexibility of working methods and increasing system efficiency.

[0003] Existing underground gas storage technology mainly utilizes salt caverns and abandoned mines for transformation, which greatly limits the application scope of compressed air energy storage. Compared with natural salt caverns and abandoned mines, hard rock layers are more widely distributed. The construction of artificial underground gas storage in hard rock layers can greatly reduce the dependence on geographical conditions. However, during the construction of compressed air energy storage power stations, the layout of gas storage and auxiliary caverns directly affects the overall cost and construction period of the project. The layout design and construction of artificial underground gas storage have become an important part of compressed air energy storage underground projects. Actively exploring new gas storage solutions with flexible layout characteristics is of great significance for the large-scale application of compressed air energy storage technology. Summary of the invention

[0004] The purpose of the present invention is to provide an artificial underground gas storage system for a compressed air energy storage power station, which solves the problem that the existing underground gas storage technology mainly utilizes salt caverns and abandoned mine caves for transformation, which limits the application scope of compressed air energy storage.

[0005] Another object of the present invention is to provide a construction method for an artificial underground gas storage system for a compressed air energy storage power station.

[0006] The technical solution adopted by the present invention is an artificial underground gas storage system for a compressed air energy storage power station, including a traffic inclined shaft, one end of which passes through the ground, the other end of which is connected to an arc-shaped connecting section, the other end of which is connected to a gas storage unit, the gas storage unit is connected to a traffic vertical shaft, the other end of which passes through the ground, a gas delivery unit is arranged in the traffic vertical shaft, and the gas delivery unit is connected to the gas storage unit.

[0007] The present invention is also characterized in that:

[0008] The gas transmission unit includes an air inlet pipe and an air outlet pipe, both of which are arranged in a traffic shaft. One end of the air inlet pipe and the air outlet pipe passes through the ground, and the other end of the air inlet pipe and the air outlet pipe extends to the gas storage unit.

[0009] The gas storage unit includes a plurality of gas storages, which are arranged horizontally in a ring shape, are connected to each other through connecting holes, a traffic shaft is connected to any connecting hole, an air inlet pipe and an air outlet pipe extend through the connecting hole to the gas storage near the traffic shaft, and a connecting hole sealing body is provided in the connecting hole near the traffic shaft.

[0010] The gas storage includes a cavern body with a steel lining provided inside the cavern body, a steel lining wrapped with concrete provided between the steel lining and the inner wall of the cavern body, and a maintenance gate provided inside the gas storage near the traffic shaft, and the gaps between the maintenance gate, the air inlet pipe, the air outlet pipe and the steel lining are filled with a gas storage sealing body.

[0011] Another technical solution adopted by the present invention is a construction method of an artificial underground gas storage system for a compressed air energy storage power station, comprising the following steps:

[0012] S1. Use TBM to excavate the traffic inclined shaft to the specified burial depth; use the vertical shaft method to excavate the traffic shaft;

[0013] S2. A crusher is arranged in the traffic shaft and a belt conveyor is arranged in the traffic inclined shaft;

[0014] S3. Use TBM to excavate the first gas storage pilot tunnel, and use manual drilling and blasting to expand the first gas storage; use manual drilling and blasting to excavate the connecting hole at the bottom of the shaft and connect it to the first gas storage;

[0015] S4. Use TBM to excavate multiple gas storages and connecting holes, and connect the multiple gas storages through the connecting holes;

[0016] S5. Install steel lining and concrete covering the steel lining in the gas storage reservoir; arrange air inlet and outlet pipes in the traffic shaft and extend them into the gas storage reservoir;

[0017] S6. Set up a connecting hole plugging body in the connecting hole; fill the gas storage plugging body in the gas storage reservoir to complete the construction of the gas storage reservoir system.

[0018] Another technical solution of the present invention is also characterized in that:

[0019] The specific contents of using TBM to excavate the first gas storage pilot tunnel in S3 are as follows: the slag is crushed by a crusher and transported to the ground by a belt conveyor through a traffic inclined shaft, the location of the gas storage is confirmed by excavating an arc-shaped connecting section, and the first gas storage pilot tunnel is excavated using TBM.

[0020] The specific content of arranging the air inlet pipe and the air outlet pipe in the traffic shaft and extending them to the gas storage in S5 is: arranging the air inlet pipe and the air outlet pipe in the traffic shaft and extending them to the gas storage near the traffic shaft.

[0021] The specific content of S6 is: setting a connecting hole sealing body in the connecting hole near the traffic shaft; setting a maintenance gate in the gas storage reservoir near the traffic shaft, filling the gaps between the maintenance gate, air inlet pipe, air outlet pipe and steel lining with the gas storage reservoir sealing body to complete the construction of the gas storage reservoir system.

[0022] The beneficial effects of the present invention are:

[0023] The artificial underground gas storage system and construction method for a compressed air energy storage power station provided by the present invention solve the problem that the existing underground gas storage technology mainly utilizes salt caverns and abandoned mines for transformation, which limits the application scope of compressed air energy storage. By setting up a reasonable gas storage system and combining the advantages of artificial drilling and blasting and TBM excavation, the underground gas storage system can be quickly established, and the working environment is significantly improved. With little difference in engineering volume and cost, 20% of the construction period is saved, the working environment is improved, the construction efficiency is high, and the establishment of the underground gas storage system is quickly realized, which is of great significance for the large-scale application of compressed air energy storage technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an artificial underground gas storage system for a compressed air energy storage power station according to the present invention;

[0025] Figure 2 It is the elevational layout diagram of the present invention;

[0026] Figure 3 It is a schematic diagram of the sealing structure of the gas storage of the present invention.

[0027] In the figure, 1. Traffic inclined shaft; 2. Traffic vertical shaft; 3. Gas storage reservoir; 4. Connection hole plugging body; 5. Connection hole; 6. Arc-shaped connecting section; 7. Steel lining wrapped with concrete; 8. Steel lining; 9. Gas storage reservoir plugging body; 10. Maintenance gate; 11. Inlet pipe; 12. Outlet pipe. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] The artificial underground gas storage system for compressed air energy storage power station proposed in this embodiment is as follows: Figure 1 As shown, it includes a traffic inclined shaft 1, one end of which passes through the ground, and the other end of the traffic inclined shaft 1 is connected to an arc-shaped connecting section 6, and the other end of the arc-shaped connecting section 6 is connected to a gas storage unit, and the gas storage unit is connected to a traffic vertical shaft 2, as shown in FIG. Figure 2 As shown, the other end of the traffic shaft 2 passes through the ground, and a gas delivery unit is provided in the traffic shaft 2, and the gas delivery unit is connected to the gas storage unit.

[0031] Example 2

[0032] The artificial underground gas storage system for compressed air energy storage power station proposed in this embodiment is as follows: Figure 1 As shown, it includes a traffic inclined shaft 1, one end of which passes through the ground, and the other end of the traffic inclined shaft 1 is connected to an arc-shaped connecting section 6, and the other end of the arc-shaped connecting section 6 is connected to a gas storage unit, and the gas storage unit is connected to a traffic vertical shaft 2, as shown in FIG. Figure 2 As shown, the other end of the traffic shaft 2 passes through the ground, and a gas delivery unit is provided in the traffic shaft 2, and the gas delivery unit is connected to the gas storage unit; Figure 3 As shown, the gas delivery unit includes an air inlet pipe 11 and an air outlet pipe 12. The air inlet pipe 11 and the air outlet pipe 12 are both arranged in the traffic shaft 2. One end of the air inlet pipe 11 and the air outlet pipe 12 passes through the ground, and the other end of the air inlet pipe 11 and the air outlet pipe 12 extends to the gas storage unit.

[0033] Example 3

[0034] The artificial underground gas storage system for compressed air energy storage power station proposed in this embodiment is as follows: Figure 1 As shown, it includes a traffic inclined shaft 1, one end of which passes through the ground, and the other end of the traffic inclined shaft 1 is connected to an arc-shaped connecting section 6, and the other end of the arc-shaped connecting section 6 is connected to a gas storage unit, and the gas storage unit is connected to a traffic vertical shaft 2, as shown in FIG. Figure 2 As shown, the other end of the traffic shaft 2 passes through the ground, and a gas delivery unit is provided in the traffic shaft 2, and the gas delivery unit is connected to the gas storage unit; Figure 3 As shown, the gas transmission unit includes an air inlet pipe 11 and an air outlet pipe 12, both of which are arranged in the traffic shaft 2, one end of the air inlet pipe 11 and the air outlet pipe 12 passes through the ground, and the other end of the air inlet pipe 11 and the air outlet pipe 12 extends to the gas storage unit; the gas storage unit includes a plurality of gas storages 3, and the plurality of gas storages 3 are arranged horizontally in a circular shape. The bending radius of the axis of the plurality of gas storages 3 takes into account the turning requirements of small-diameter TBMs when designing, and the bending radius of the arc-shaped connecting section 6 of the traffic inclined shaft 1 and the gas storage 3 should also meet this requirement. The diameter of the traffic shaft 2 needs to meet the transportation requirements of TBM dismantling parts and the steel lining of the gas storage 3, and also shortens the traffic shaft 2. The wind distance can accelerate the elimination of the blasting smoke generated by the artificial drilling and blasting method. Several gas storages 3 are connected through connecting holes 5. The traffic shaft 2 is connected to any connecting hole 5. The air inlet pipe 11 and the air outlet pipe 12 extend through the connecting hole 5 to the gas storage 3 near the traffic shaft 2. A connecting hole blocking body 4 is provided in the connecting hole 5 near the traffic shaft 2; the gas storage 3 includes a cave body, a steel lining 8 is provided in the cave body, and a steel lining wrapped with concrete 7 is provided between the steel lining 8 and the inner wall of the cave body. A maintenance gate 10 is also provided in the gas storage 3 near the traffic shaft 2, and the gaps between the maintenance gate 10, the air inlet pipe 11, the air outlet pipe 12 and the steel lining 8 are filled with a gas storage blocking body 9.

[0035] Example 4

[0036] The construction method of an artificial underground gas storage system for a compressed air energy storage power station proposed in this embodiment includes the following steps:

[0037] S1. Use TBM to excavate the traffic inclined shaft to the specified burial depth; use the vertical shaft method to excavate the traffic shaft;

[0038] S2. A crusher is arranged in the traffic shaft and a belt conveyor is arranged in the traffic inclined shaft;

[0039] S3. Use TBM to excavate the first gas storage pilot tunnel, and use manual drilling and blasting to expand the first gas storage; use manual drilling and blasting to excavate the connecting hole at the bottom of the shaft and connect it to the first gas storage;

[0040] S4. Use TBM to excavate multiple gas storages and connecting holes, and connect the multiple gas storages through the connecting holes;

[0041] S5. Install steel lining and concrete covering the steel lining in the gas storage reservoir; arrange air inlet and outlet pipes in the traffic shaft and extend them into the gas storage reservoir;

[0042] S6. Set up a connecting hole plugging body in the connecting hole; fill the gas storage plugging body in the gas storage reservoir to complete the construction of the gas storage reservoir system.

[0043] Example 5

[0044] The construction method of an artificial underground gas storage system for a compressed air energy storage power station proposed in this embodiment includes the following steps:

[0045] S1. Use TBM to excavate the traffic inclined shaft to the specified burial depth; use the vertical shaft method to excavate the traffic shaft;

[0046] S2. A crusher is arranged in the traffic shaft and a belt conveyor is arranged in the traffic inclined shaft;

[0047] S3. Use TBM to excavate the first gas storage pilot tunnel, and use manual drilling and blasting to expand the first gas storage; use manual drilling and blasting to excavate the connecting hole at the bottom of the shaft and connect it to the first gas storage;

[0048] The specific contents of using TBM to excavate the first gas storage pilot tunnel are as follows: the slag is crushed by a crusher and then transported to the ground through a traffic inclined shaft by a belt conveyor, the location of the gas storage is confirmed by excavating an arc-shaped connecting section, and the first gas storage pilot tunnel is excavated by TBM;

[0049] S4. Use TBM to excavate multiple gas storages and connecting holes, and connect the multiple gas storages through the connecting holes;

[0050] S5. Install steel lining and concrete covering the steel lining in the gas storage reservoir; arrange air inlet and outlet pipes in the traffic shaft and extend them into the gas storage reservoir;

[0051] S6. Set up a connecting hole plugging body in the connecting hole; fill the gas storage plugging body in the gas storage reservoir to complete the construction of the gas storage reservoir system.

[0052] Example 6

[0053] The construction method of an artificial underground gas storage system for a compressed air energy storage power station proposed in this embodiment includes the following steps:

[0054] S1. Use TBM to dig the traffic inclined shaft to the specified burial depth; use the vertical shaft method to dig out the traffic shaft, and use the high excavation efficiency of TBM to quickly enter the gas storage working surface;

[0055] S2. A crusher is arranged in the traffic shaft and a belt conveyor is arranged in the traffic inclined shaft;

[0056] S3. Use TBM to excavate the first gas storage pilot tunnel, and use manual drilling and blasting to expand the first gas storage, avoiding the time-consuming problem of excavating in stages by manual drilling and blasting. In addition, the pilot tunnel has an additional open surface, which greatly improves the blasting efficiency and the working environment. Use manual drilling and blasting to excavate the connecting tunnel at the bottom of the shaft and connect it with the first gas storage. Use the main shaft method to excavate the traffic shaft, and use manual drilling and blasting to excavate the gas storage connecting tunnel at the bottom of the shaft. After the connecting tunnel is excavated, the conditions for TBM to excavate the next gas storage pilot tunnel are met;

[0057] The specific contents of using TBM to excavate the first gas storage pilot tunnel are as follows: the slag is crushed by a crusher and then transported to the ground through a traffic inclined shaft by a belt conveyor, the location of the gas storage is confirmed by excavating an arc-shaped connecting section, and the first gas storage pilot tunnel is excavated by TBM;

[0058] S4. Use TBM to excavate multiple gas storages and connecting holes, and connect the multiple gas storages through the connecting holes;

[0059] S5. Install steel lining and concrete covering the steel lining in the gas storage reservoir; arrange air inlet and outlet pipes in the traffic shaft and extend them into the gas storage reservoir;

[0060] The specific contents of arranging the air inlet pipe and the air outlet pipe in the traffic shaft and extending them to the gas storage are as follows: arranging the air inlet pipe and the air outlet pipe in the traffic shaft and extending them to the gas storage near the traffic shaft;

[0061] S6. Install a connecting hole plugging body in the connecting hole; fill the gas storage plugging body in the gas storage reservoir to complete the construction of the gas storage reservoir system;

[0062] The specific contents are as follows: a connecting hole sealing body is set up in the connecting hole near the traffic shaft; an inspection gate is set up in the gas storage reservoir near the traffic shaft, and the gaps between the inspection gate, air inlet pipe, air outlet pipe and steel lining are filled with the gas storage reservoir sealing body to complete the construction of the gas storage reservoir system.

Claims

1. An artificial underground gas storage system for a compressed air energy storage power station, characterized in that: The invention comprises a traffic inclined shaft (1), one end of which passes through the ground, the other end of which is connected to an arc-shaped connecting section (6), the other end of which is connected to a gas storage unit, the gas storage unit is connected to a traffic vertical shaft (2), the other end of which passes through the ground, a gas delivery unit is arranged in the traffic vertical shaft (2), and the gas delivery unit is connected to the gas storage unit.

2. The artificial underground gas storage system for a compressed air energy storage power station according to claim 1, characterized in that: The gas delivery unit comprises an air inlet pipe (11) and an air outlet pipe (12), wherein the air inlet pipe (11) and the air outlet pipe (12) are both arranged in the traffic shaft (2), one end of the air inlet pipe (11) and the air outlet pipe (12) penetrates the ground, and the other end of the air inlet pipe (11) and the air outlet pipe (12) extend to the gas storage unit.

3. The artificial underground gas storage system for a compressed air energy storage power station according to claim 2, characterized in that: The gas storage unit comprises a plurality of gas storages (3), wherein the plurality of gas storages (3) are arranged horizontally in a circular shape, and the plurality of gas storages (3) are connected to each other via connecting holes (5), the traffic shaft (2) is connected to any of the connecting holes (5), the air inlet pipe (11) and the air outlet pipe (12) extend through the connecting holes (5) to the gas storage (3) near the traffic shaft (2), and a connecting hole blocking body (4) is provided in the connecting hole (5) near the traffic shaft (2).

4. The artificial underground gas storage system for a compressed air energy storage power station according to claim 3, characterized in that: The gas storage reservoir (3) comprises a cavern, wherein a steel lining (8) is provided inside the cavern, and a steel lining wrapped with concrete (7) is provided between the steel lining (8) and the inner wall of the cavern, and a maintenance gate (10) is also provided inside the gas storage reservoir (3) near the traffic shaft (2), and the gaps between the maintenance gate (10), the air inlet pipe (11), the air outlet pipe (12) and the steel lining (8) are filled with a gas storage reservoir blocking body (9).

5. A method for constructing an artificial underground gas storage system for a compressed air energy storage power station, characterized in that: The artificial underground gas storage system for a compressed air energy storage power station according to claim 4 comprises the following steps: S1. Use TBM to excavate the traffic inclined shaft to the specified burial depth; use the vertical shaft method to excavate the traffic shaft; S2. A crusher is arranged in the traffic shaft and a belt conveyor is arranged in the traffic inclined shaft; S3. Use TBM to excavate the first gas storage pilot tunnel, and use manual drilling and blasting to expand the first gas storage; use manual drilling and blasting to excavate the connecting hole at the bottom of the shaft and connect it to the first gas storage; S4. Use TBM to excavate multiple gas storages and connecting holes, and connect the multiple gas storages through the connecting holes; S5. Install steel lining and concrete covering the steel lining in the gas storage reservoir; arrange air inlet and outlet pipes in the traffic shaft and extend them into the gas storage reservoir; S6. Set up a connecting hole plugging body in the connecting hole; fill the gas storage plugging body in the gas storage reservoir to complete the construction of the gas storage reservoir system.

6. The construction method of an artificial underground gas storage system for a compressed air energy storage power station according to claim 5, characterized in that: The specific contents of using TBM to excavate the first gas storage pilot tunnel described in S3 are: the slag is crushed by a crusher and then transported to the ground by a belt conveyor through a traffic inclined shaft, the location of the gas storage is confirmed by excavating an arc-shaped connecting section, and the first gas storage pilot tunnel is excavated by using TBM.

7. The construction method of an artificial underground gas storage system for a compressed air energy storage power station according to claim 5, characterized in that: The specific content of arranging the air inlet pipe and the air outlet pipe in the traffic shaft and extending them to the gas storage reservoir in S5 is: arranging the air inlet pipe and the air outlet pipe in the traffic shaft and extending them to the gas storage reservoir close to the traffic shaft.

8. The construction method of an artificial underground gas storage system for a compressed air energy storage power station according to claim 5, characterized in that: The specific content of S6 is: setting a connecting hole blocking body in the connecting hole near the traffic shaft; setting a maintenance gate in the gas storage reservoir near the traffic shaft, filling the gaps between the maintenance gate, the air inlet pipe, the air outlet pipe and the steel lining with the gas storage reservoir blocking body, and completing the construction of the gas storage reservoir system.

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