A geothermal high-efficiency compressed air energy storage system for buried pipelines in abandoned mines

Abstract

This invention discloses a geothermal high-efficiency compressed air energy storage system for abandoned mines, comprising: a gas storage pipe, a geothermal heat supply pipe, a ventilation pipe, a gas-driven pump, a first control valve, and a second control valve. The gas storage pipe is horizontally arranged in a horizontal roadway of the abandoned mine, with its inlet end connected to an air compressor and its exhaust end connected to a generator. The geothermal heat supply pipe is vertically arranged in a geothermal layer below the horizontal roadway, with both ends connected to the two ends of the gas storage pipe. The ventilation pipe has its upper and lower ends connected to the upper part of the geothermal heat supply pipe, and the gas-driven pump is mounted on the ventilation pipe. The first control valve is mounted on the ventilation pipe, and the second control valve is mounted on the geothermal heat supply pipe, located between the upper and lower ends of the ventilation pipe. This energy storage system effectively compensates for the energy loss of compressed air within the pipeline, overcoming the problem of electrical energy loss.

Description

Technical Field

[0001] This invention relates to the field of mine energy storage technology, and in particular to a geothermal high-efficiency compressed air energy storage system for buried pipelines in abandoned mines. Background Technology

[0002] This year, the world's largest compressed air energy storage project was connected to the grid and put into operation in Shandong, my country. This technology utilizes excess electricity from the grid during off-peak hours to drive air compressors, compressing outside air into high-pressure gas for storage. During peak hours, this high-pressure gas is released to drive motors and generate electricity, enabling large-scale, long-term energy storage and utilization. Currently, most of my country's existing pipeline compressed air energy storage facilities operate above ground, while some demonstration projects using artificial chambers as storage facilities are under construction. This method, using manually excavated chambers, is not only costly but also time-consuming. my country has a large number of idle or abandoned mines. By appropriately modifying these mines and combining them with compressed air energy storage technology—that is, placing compressed air pipelines within these abandoned mines—it not only solves the problems of high cost and long construction time associated with manually excavated chambers but also enables the resource utilization of these abandoned mines, accelerating the implementation and operation of compressed air energy storage projects. However, during operation, the air is compressed into the pipe, causing a temperature increase. This heat is then gradually dissipated to the outside of the pipe, resulting in a decrease in the pressure of the compressed air inside. This, in turn, reduces the driving force on the generator during subsequent release, leading to a decrease in power generation. Since this energy loss is converted from the surplus electrical energy from the initial stage, it is equivalent to a loss of electrical energy. Although wrapping the outside of the pipe with insulation material helps reduce heat loss, this method cannot fundamentally solve the problem of energy loss. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a geothermal high-efficiency compressed air energy storage system for buried pipelines in abandoned mines. This system can effectively compensate for energy loss of compressed air within the pipeline and overcome the problem of power consumption. Specifically, the technical solution of this invention is as follows.

[0004] A geothermal high-efficiency compressed air energy storage system for abandoned mines includes: a gas storage pipe, an air compressor, a generator, a geothermal heat supply pipe, a ventilation pipe, a gas-driven pump, a first control valve, and a second control valve. The gas storage pipe is horizontally arranged in the horizontal roadway of the abandoned mine, with its inlet end connected to the air compressor and its exhaust end connected to the generator. The geothermal heat supply pipe is a U-shaped pipe, vertically arranged in the geothermal layer below the horizontal roadway, with both ends connected to the two ends of the gas storage pipe. The ventilation pipe is connected to the upper part of the geothermal heat supply pipe at both its upper and lower ends, and the gas-driven pump is mounted on the ventilation pipe. The first control valve is mounted on the ventilation pipe, and the second control valve is mounted on the geothermal heat supply pipe, located between its upper and lower ends.

[0005] Furthermore, a heat exchange chamber is located below the horizontal tunnel, the upper part of the geothermal supplementary heat pipe is located in the heat exchange chamber, and the lower part of the geothermal supplementary heat pipe is vertically buried in the geothermal layer from the heat exchange chamber.

[0006] Furthermore, the outer walls of the exposed portions of the gas storage pipe and the geothermal heat supply pipe are covered with an insulation layer to reduce heat loss from the gas storage pipe.

[0007] Furthermore, a pressure gauge is installed on the gas storage pipe to monitor the pressure of the gas in the gas storage pipe.

[0008] Furthermore, it also includes a top plate, a suspension pipe, a support pipe, a positioning pipe, and an energy-absorbing spring. Specifically: the top plate is positioned above the gas storage pipe; both ends of the suspension pipe are closed, with a grouting port on its lower sidewall and a grout outlet on its upper sidewall. The upper part of the suspension pipe is anchored to an anchoring hole in the roof wall of the horizontal roadway through an anchoring agent injected via the grouting port. The lower end of the suspension pipe passes through the top plate and is located in the upper port of the positioning pipe, with the two threadedly connected. The top plate is supported on the upper end face of the positioning pipe, and the grouting port is located above the top plate. The lower end of the positioning pipe is movably inserted into the upper port of the support pipe, which is vertically fixed to the ground. The support pipe has internal threads on its inner wall, and the energy-absorbing spring is screwed into the cavity of the support pipe through these internal threads, forming a threaded connection. The lower port of the positioning pipe is suspended above the energy-absorbing spring.

[0009] Furthermore, a horizontally arranged nut sleeve is fixed on the outer wall of the upper port of the positioning tube, and the top plate is supported on the nut sleeve.

[0010] Furthermore, a rigid ball is placed on top of the energy-absorbing spring, and the lower end of the positioning tube is suspended above the rigid ball.

[0011] Furthermore, the side of the top plate is a flat plate with a through hole, and the lower end of the suspension tube passes through the through hole and enters the upper port of the positioning tube, and the two are threaded together.

[0012] Furthermore, a filling space is provided between the roof plate and the top wall of the horizontal tunnel, wherein a buffer layer formed by elastic material particles is filled. Optionally, the elastic material particles are made of at least one of rubber, plastic, etc.

[0013] Furthermore, it also includes a funnel-shaped anti-clogging sleeve, which is made of rubber or flexible plastic. The smaller end of the anti-clogging sleeve is located on top and is fitted onto the positioning tube, with the two in movable contact. The larger end of the anti-clogging sleeve is located on the bottom, and its lower surface is supported on the upper end surface of the support tube, thereby forming a movable seal on the upper port of the support tube.

[0014] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0015] (1) The compressed air energy storage system of the present invention is based on the transformation of abandoned mines, which not only makes full use of this abandoned resource and effectively overcomes the problem of power loss, but also forms multiple layers of protection for facilities in horizontal roadways. To this end, on the one hand, the present invention sets up a geothermal supplementary heating pipe buried in the geothermal layer below the horizontal roadway and connects it to both ends of the gas storage pipe. In this way, not only can the geothermal supplementary heating pipe be used to store compressed air and increase the gas storage capacity, but the heat dissipation rate of the compressed air entering the geothermal supplementary heating pipe is significantly reduced, which can effectively reduce the loss of energy of this part of the compressed air. At the same time, the gas located in the geothermal supplementary heating pipe can also transfer the heat in the geothermal layer to the compressed air in the gas storage pipe to heat it, and make up for the pressure drop caused by the heat loss of the compressed air in the gas storage pipe during the storage process. In addition, before releasing the compressed air in the gas storage pipe for power generation, the compressed air can be driven by the gas drive pump on the air exchange pipe to circulate in the circulation system formed by the gas storage pipe and the geothermal supplementary heating pipe, so as to further heat up the stored compressed air and thereby further increase the pressure of the compressed air.

[0016] (2) The compressed air energy storage system of the present invention also forms a protective structure through the top plate, suspension pipe, support pipe, positioning pipe and energy-absorbing spring to provide multiple layers of protection for facilities in the horizontal roadway. First, the grouting anchoring function of the suspension pipe not only fixes itself in the top wall of the horizontal roadway, but also reinforces the top wall of the horizontal roadway through the injected anchoring agent. At the same time, the cooperation between the suspension pipe and the positioning pipe not only supports and lifts the top plate, but also forms an energy-absorbing buffer mechanism with the support pipe and energy-absorbing spring to consume the impact energy caused by the collapse of the top wall of the horizontal roadway, thereby improving the protection capability for facilities in the roadway under extreme conditions. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 The following is a schematic diagram of the geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system in the embodiment below.

[0019] Figure 2 The following is a schematic diagram of the elastic buffer structure in the embodiments below.

[0020] Figure 3 The following is a schematic diagram of the structure of the suspension tube and the positioning tube in the embodiments.

[0021] The markings in the diagram represent: 1-Gas storage pipe, 2-Air compressor, 3-Generator, 4-Geothermal heat supply pipe, 5-Ventilation pipe, 6-Gas driven pump, 7-First control valve, 8-Second control valve, 9-Heat exchange chamber, 10-Pressure gauge, 11-Top plate, 12-Suspension pipe, 13-Support pipe, 14-Positioning pipe, 15-Energy-absorbing spring, 16-Nut sleeve, 17-Rigid ball, 18-Filling space, 19-Anti-clogging sleeve, 1201-Grouting port, 1202-Grouting outlet, 1203-Sealing plug. Detailed Implementation

[0022] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] For ease of description, the terms "up," "down," "left," and "right" appearing in this invention only indicate that they correspond to the up, down, left, and right directions in the accompanying drawings. They do not limit the structure and are merely for the purpose of facilitating and simplifying the description of this invention. They do not indicate or imply that the device or component referred to needs to have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. The technical solution of this invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0024] refer to Figure 1An example of a geothermal high-efficiency compressed air energy storage system for abandoned mines includes: a storage pipe 1, an air compressor 2, a generator 3, a geothermal heat supply pipe 4, a ventilation pipe 5, a gas-driven pump 6, a first control valve 7, and a second control valve 8. The storage pipe 1 adopts a U-shaped pipe structure and is horizontally arranged in the horizontal roadway of the abandoned mine. The inlet end of the storage pipe 1 is connected to the air compressor 2, and the exhaust end is connected to the generator 3. During off-peak electricity demand, the air compressor 2 uses excess electricity from the grid to compress outside air into high-pressure gas, which is then stored in the storage pipe 1. During peak electricity demand, this high-pressure gas is discharged from the exhaust end of the storage pipe 1 and drives the generator 3 to generate electricity. In the above process, air is compressed into the gas storage pipe 1 after mechanical work, forming high-temperature gas. However, during the subsequent storage process, heat is gradually lost, causing the gas temperature to gradually decrease, and consequently, the gas pressure of the compressed air in the gas storage pipe 1 also decreases. This gas pressure loss problem leads to a reduction in the driving force of the gas on the generator 3 when it is released, resulting in a significant loss of electrical energy. To address this, in this embodiment, a U-shaped geothermal supplementary pipe 4 is pre-buried below the aforementioned horizontal roadway, with its lower end vertically embedded in the geothermal layer. The upper part of the geothermal supplementary pipe 4 is located in the heat exchange chamber 9 below the horizontal roadway, and the lower part of the geothermal supplementary pipe 4 is vertically embedded in the geothermal layer from the heat exchange chamber 9. Simultaneously, the two upper ports of the geothermal supplementary pipe 4 are connected to both ends of the gas storage pipe 1. On the one hand, the aforementioned geothermal supplementary pipe 4 can be used to store compressed air, thereby increasing the gas storage capacity and improving the utilization potential of abandoned mines. On the other hand, the compressed air entering the aforementioned geothermal heat supply pipe 4 experiences a significantly reduced heat dissipation rate due to the heating effect of the geothermal layer, thus effectively reducing the energy loss of this compressed air. Furthermore, the compressed air in the aforementioned geothermal heat supply pipe 4 acts as a medium to transfer heat from the geothermal layer to the compressed air in the gas storage pipe 1, heating it and compensating for the pressure drop caused by heat loss during storage. This maintains a higher compressed air pressure, facilitating greater driving force during release.

[0025] Furthermore, the ventilation pipe 5 is connected to one side of the upper part of the aforementioned geothermal supplementary heating pipe 4, and the gas-driven pump 6 is installed on the ventilation pipe 5. The first control valve 7 is installed on the ventilation pipe 5, and the second control valve 8 is installed on the geothermal supplementary heating pipe 4, located between the upper and lower ends of the ventilation pipe 5. Thus, before releasing the compressed air in the aforementioned gas storage pipe 1 for power generation, the second control valve 8 is closed, the first control valve 7 is opened, and the aforementioned gas-driven pump 6 is started to drive the compressed air to circulate in the circulation system formed by the gas storage pipe 1 and the geothermal supplementary heating pipe 4, thereby further heating the stored compressed air and increasing its pressure. This allows the compressed air to provide a higher driving force when released, increasing the power generation. Moreover, since the heat used to heat the compressed air is directly obtained from the geothermal layer by the geothermal supplementary heating pipe 4, no external fuel is required, significantly reducing costs. This embodiment transforms an abandoned mine and combines it with geothermal and compressed air energy storage to form a new type of energy storage system. This not only realizes the resource utilization of the abandoned mine, but also overcomes the problem of power loss caused by the energy loss of compressed air in the gas storage pipe.

[0026] In a preferred embodiment, the outer walls of the upper exposed portions of both the compressed air storage pipe 1 and the geothermal heat supply pipe 4 in the aforementioned compressed air energy storage system are covered with an insulation layer to reduce heat loss from the storage pipe 1. The insulation layer can be made of materials resistant to high temperatures and aging, such as rock wool or carbon fiber felt.

[0027] In another embodiment, reference Figure 1 A pressure gauge 10 is installed on the gas storage pipe 1 of the aforementioned compressed air energy storage system to monitor the pressure of the gas in the gas storage pipe 1. In addition, during the aforementioned process of circulating and heating compressed air, the pressure of the gas in the gas storage pipe 1 can be monitored in real time. When a preset value is reached, the gas circulation is stopped, and then the generator 3 is released to generate electricity.

[0028] In a preferred embodiment, the compressed air energy storage system of the above embodiment further includes a top plate 11, a suspension pipe 12, a support pipe 13, a positioning pipe 14, and an energy-absorbing spring 15. See details. Figure 2 and Figure 3The roof plate 11 is an arched plate, positioned above the gas storage pipe 1 and below the top wall of the horizontal tunnel, to minimize damage to the facilities below in the event of rock strata detachment or even collapse of the top wall of the horizontal tunnel. The suspension pipe 12 is vertically installed, with both ends closed. The lower side wall of the suspension pipe 12 has a grouting port 1201, and the upper side wall has several grout outlet holes 1202. In use, a hole is first drilled in the top wall of the horizontal tunnel, then the suspension pipe 12 is inserted into the hole, and the lower end of the hole is sealed by a rubber sealing plug 1203 fitted onto the suspension pipe 12. Then, the grouting port 1201 is connected to the grouting equipment and an anchoring agent (such as cement-water glass grout) is injected. After the grouting is completed, the valve on the grouting port 1201 is closed. After the anchoring agent solidifies and hardens, the suspension pipe 12 can be fixed to the top wall of the horizontal roadway. At the same time, the anchoring agent can also play a reinforcing role after penetrating into the top wall, thereby improving its load-bearing capacity.

[0029] The top plate 11 is then installed and fixed onto the suspension pipe 12. Specifically, the side of the top plate 11 is a flat plate with a through hole. The lower end of the suspension pipe 12 passes through this through hole and enters the upper port of the positioning pipe 14. This upper port is a threaded port, and the lower outer wall of the suspension pipe 12 has an external thread that matches this threaded port. The support pipe 13 is vertically fixed on the ground of the horizontal tunnel and is located directly below the suspension pipe 12. During installation, the lower end of the positioning pipe 14 is first inserted into the upper port of the support pipe 13. Then, the upper port of the positioning pipe 14 and the lower end of the suspension pipe 12 are aligned, and the positioning pipe 14 is rotated to make them threadedly connected. At the same time, a support platform is formed between the upper port of the positioning pipe 14 and the outer wall of the suspension pipe 12, which provides support and lift for the top plate 11. In addition, the grouting port 1201 is located above the top plate 11 at this time. In this embodiment, the positioning tube 14 not only forms a supporting structure for the top plate with the suspension tube 12, but also forms an energy-absorbing buffer mechanism with the support tube 13. Thus, after anchoring the suspension tube 12, the top plate 11 is installed and the energy-absorbing buffer mechanism is constructed, forming a multi-layered structure. The inner wall of the support tube 13 has internal threads, through which the energy-absorbing spring 15 is screwed into the cavity of the support tube 13, forming a threaded connection. The lower end of the positioning tube 14 is suspended above the energy-absorbing spring 15.

[0030] When the roof of the horizontal tunnel experiences rock strata detachment or even collapse, the roof slab 11 provides the first layer of protection. Then, the anchoring between the suspension pipe 12 and the roof provides the second layer of protection. After the suspension pipe 12 separates from the roof, the positioning pipe 14 compresses the energy-absorbing spring 15, providing the third layer of protection, thus significantly reducing damage to facilities in the horizontal tunnel. Furthermore, the special structure formed between the energy-absorbing spring 15 and the support pipe 13 further enhances the buffering capacity of the energy-absorbing spring 15. This is because when the energy-absorbing spring 15 is compressed, the internal threads of the support pipe 13 must be damaged first. Since the compression of the energy-absorbing spring 15 starts from the top, the damage to the internal threads of the support pipe 13 also begins from the top. Thus, the buffer structure formed by the support pipe 13 and the energy-absorbing spring 15 can continue to function until the internal threads are completely destroyed. This process can significantly dissipate the impact energy from the collapse of the horizontal tunnel roof, improving the protection of facilities in the horizontal tunnel under extreme conditions.

[0031] In another embodiment, reference Figure 2 and Figure 3 In the compressed air energy storage system of the above embodiment, a horizontally arranged nut sleeve 16 is fixed on the outer wall of the upper port of the positioning tube 14, and the top plate 11 is supported on the nut sleeve 16. The nut sleeve 16 not only helps to increase the support area of ​​the top plate 11, but also facilitates the rotation of the positioning tube 14 by means of tools such as wrenches and nut sleeve 16 (such as hexagonal nuts).

[0032] In a preferred embodiment, reference is made to... Figure 2 In the compressed air energy storage system of the above embodiment, a rigid ball 17 is placed on the energy-absorbing spring 15, and the lower end of the positioning tube 14 is suspended above the rigid ball 17. When the top plate 11 transmits the impact force to the positioning tube 14 and presses down on the energy-absorbing spring 15, the rigid ball 17 can simultaneously convert a portion of the force into an outward expansion of the upper end of the energy-absorbing spring 15, thereby increasing the friction between the energy-absorbing spring 15 and the inner wall of the support tube 13 and improving the ability to absorb the impact force.

[0033] In a preferred embodiment, reference is made to... Figure 2 The compressed air energy storage system has a filling space 18 between the roof 11 and the roof wall of the horizontal tunnel. This filling space 18 is filled with a buffer layer formed by elastic material particles. The elastic material particles include at least one of rubber, plastic, etc. The buffer layer helps to prevent the roof 11 from being impacted and damaged by rocks or other debris falling from the roof wall of the horizontal tunnel, absorbs impact energy, and provides pre-protection for the roof 11.

[0034] In another embodiment, reference Figure 2 The compressed air energy storage system also includes a funnel-shaped anti-clogging sleeve 19. Specifically, the anti-clogging sleeve 19 is made of rubber or flexible plastic, with its smaller end at the top and its larger end at the bottom. The smaller end of the anti-clogging sleeve 19 is movably fitted onto the positioning tube 14, allowing it to move up and down along the positioning tube 14 and rotate around it. The diameter of the larger end of the anti-clogging sleeve 19 is larger than the diameter of the upper port of the support tube 13. In use, the anti-clogging sleeve 19 is moved until its lower surface at its larger end is positioned and supported on the upper end face of the support tube 13, thereby sealing the upper port of the support tube 13. When soil, sand, or gravel falls onto the anti-clogging sleeve 19 during construction or service, its inclined surface structure allows it to be guided, preventing it from entering the gap between the positioning tube 14 and the support tube 13 and causing blockage, thus affecting the movement of the positioning tube 14. Meanwhile, the anti-blocking sleeve 19 can move relative to the positioning tube 14, thus not affecting the positioning tube 14 entering and exiting the support tube 13, and acts with the energy-absorbing spring 15 therein to achieve a buffering function.

[0035] Finally, it should be noted that any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention. Although specific embodiments of this invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this invention are still within the scope of protection of this invention.

Claims

1. A geothermal high-efficiency compressed air energy storage system for buried pipelines in abandoned mines, characterized in that, include: The gas storage pipe is horizontally arranged in the horizontal roadway of the abandoned mine, and the inlet end of the gas storage pipe is connected to the air compressor, and the exhaust end is connected to the generator. The geothermal supplement pipe is a "U"-shaped pipe that is vertically installed in the geothermal layer below the horizontal tunnel, and both ends of the geothermal supplement pipe are connected to both ends of the gas storage pipe. The ventilation pipe is connected to the upper part of the geothermal heat supply pipe at both its upper and lower ends, and is equipped with a gas-driven pump and a first control valve. as well as The second control valve is installed on the geothermal heat supply pipe and located between the upper and lower ends of the ventilation pipe; A top plate, which is positioned above the gas storage pipe; The suspended pipe has closed ends, with a grouting port on its lower sidewall and a grout outlet on its upper sidewall; the upper part of the suspended pipe is anchored in the anchoring hole of the top wall of the horizontal tunnel by the anchoring agent injected through the grouting port. The lower end of the positioning tube passes through the top plate and is located in the upper port of the positioning tube, and the two are threaded together. At this time, the top plate is supported on the upper end surface of the positioning tube, and the grouting port is located above the top plate; the lower end of the positioning tube is movably inserted into the upper port of the support tube that is vertically fixed to the ground. An energy-absorbing spring is provided, with an internal thread on the inner wall of the support tube. The energy-absorbing spring is screwed into the cavity of the support tube through this internal thread to form a threaded connection between the two, and the lower end of the positioning tube is suspended above the energy-absorbing spring.

2. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, The horizontal tunnel has a heat exchange chamber below it, the upper part of the geothermal supplement pipe is located in the heat exchange chamber, and the lower part of the geothermal supplement pipe is vertically buried in the geothermal layer from the heat exchange chamber.

3. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, The exposed portions of the gas storage pipe and the geothermal heat supply pipe are all covered with an insulation layer.

4. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, A pressure gauge is installed on the gas storage pipe.

5. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, A horizontally arranged nut sleeve is fixed on the outer wall of the upper port of the positioning tube, and the top plate is supported on the nut sleeve.

6. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, A rigid ball is placed on top of the energy-absorbing spring, and the lower end of the positioning tube is suspended above the rigid ball.

7. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, There is a filling space between the roof and the top wall of the horizontal tunnel, which is filled with a buffer layer formed by elastic material particles.

8. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 7, characterized in that, The elastic material particles are made of at least one of rubber and plastic.

9. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, The top plate has a flat plate shape with a through hole on its side. The lower end of the suspension tube passes through the through hole and enters the upper port of the positioning tube, and the two are threaded together.

10. The geothermal high-efficiency abandoned mine buried pipeline compressed air energy storage system according to claim 1, characterized in that, It also includes a funnel-shaped anti-clogging sleeve, which is made of rubber or flexible plastic. The smaller end of the anti-clogging sleeve is located on top and is fitted onto the suspension tube, with the two in movable contact. The larger end of the anti-clogging sleeve is located on the bottom, and its lower surface is supported on the upper surface of the support tube.

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