CN117605532A - Underground compressed air energy storage chamber capable of resisting large deformation - Google Patents

Abstract

The invention discloses an underground compressed air energy storage chamber that can resist large deformation, and belongs to the technical field of compressed air energy storage. It includes a lining layer, a bending sealing layer, an air inlet pipe, and an exhaust pipe. The lining layer is arranged inside the underground rock cavity to form a gas storage space inside the lining layer; the bending sealing layer is arranged on the inner wall of the lining layer to allow gas storage. The space is sealed by a bending sealing layer; the lining layer and the bending sealing layer are provided with air inlets and exhaust ports at corresponding positions. One end of the air inlet pipe is fixedly connected to the air inlet, and the other end of the air inlet pipe is connected to the air generating mechanism. , through the air inlet pipe, the compressed air generated by the air generating mechanism can enter the air storage space. One end of the exhaust pipe is fixedly connected to the exhaust port, and the other end of the exhaust pipe is connected to the air using mechanism. Through the exhaust pipe, the storage space The compressed air in the air space can be delivered to the air-using mechanism. It can maintain high sealing performance and reduce gas leakage in underground compressed air energy storage chambers.

Description

Underground compressed air energy storage chamber that can resist large deformation

Technical field

The present invention relates to the technical field of compressed air energy storage, and in particular to an underground compressed air energy storage chamber that can resist large deformation.

Background technique

Compressed air energy storage technology has the advantages of large capacity, long working cycle, high efficiency, low cost, high safety factor, and good economic performance. It is a new large-scale energy storage technology suitable for large-scale promotion. With its advantages of not being restricted by geographical conditions, high stability, and environmentally friendly, shallow underground compressed air energy storage chambers have become a hot topic in promoting green energy transformation, rapid development of new energy storage, and safe and economical operation of power grids. However, during the application process of underground compressed air energy storage chambers, it is easy to cause air leakage.

Contents of the invention

In view of this, the present invention provides an underground compressed air energy storage chamber that can resist large deformation, and can still maintain a high seal even when the rocks or lining layers around the energy storage chamber are deformed or broken. performance, reducing gas leakage in underground compressed air energy storage chambers, making it more suitable for practical use.

In order to achieve the above objectives, the technical solution of an underground compressed air energy storage chamber that can resist large deformation provided by the present invention is as follows:

The underground compressed air energy storage chamber provided by the invention that can resist large deformation includes a lining layer (2), a bending sealing layer (3), an air inlet pipe (9), and an exhaust pipe (8).

The lining layer (2) is arranged inside the cavity of the underground rock (1), so that a gas storage space is formed inside the lining layer (2);

The bending sealing layer (3) is provided on the inner wall of the lining layer (2), so that the air storage space is sealed by the bending sealing layer (3);

The lining layer (2) and the bending sealing layer (3) are provided with air inlets and exhaust ports at corresponding positions.

One end of the air inlet pipe (9) is fixedly connected to the air inlet, and the other end of the air inlet pipe (9) is connected to the air generating mechanism. Through the air inlet pipe (9), the air generated by the air generating mechanism is Compressed air can enter the air storage space,

One end of the exhaust pipe (8) is fixedly connected to the exhaust port, and the other end of the exhaust pipe (8) is connected to the air using mechanism. Through the exhaust pipe (8), the gas storage The compressed air in the space can be delivered to the air-using mechanism.

The emotion recognition method provided by the present invention can also be further implemented by adopting the following technical measures.

Preferably, the underground compressed air energy storage chamber that can resist large deformation also includes a first fixing part (5),

The lining layer (2) is fixed to the inner wall of the underground rock (1) cavity through the first fixing member (5).

Preferably, the first fixing member (5) is an anchor rod, the fixed end of the anchor rod is arranged on the lining layer (2), and the anchoring section of the anchor rod is arranged in the rock (1).

Preferably, the air generating mechanism includes an electric motor (10), an air compressor (11) and a first valve (12),

The electric motor (10) is used to control the air compressor (11) to generate compressed air,

The first valve (12) is provided on the air inlet pipe (9) and is used to control the communication or sealing of the air inlet pipe (9) from the air compressor (11) to the air inlet. .

Preferably, the air-using mechanism includes a second valve (13), an air expander (14) and a generator (15),

The second valve (13) is provided on the exhaust pipe and is used to control the communication or sealing of the exhaust pipe (8) connected from the exhaust port to the air expander (14),

The generator (15) is used to generate electricity using air from the air expander (14).

Preferably, the underground compressed air energy storage chamber that can resist large deformation also includes a strip sealing device (4),

The bent sealing layer (3) includes a plurality of sealing members, and the plurality of sealing members are connected as a whole through the strip sealing device (4).

Preferably, after the plurality of sealing members are connected into one body through the strip sealing device (4), the total area is 2-3 times the total area of the inner wall of the gas storage space.

Preferably, after the plurality of sealing members are connected into one body through the strip sealing device (4), the connection between the sealing members has an overlapping area, and the area of the overlapping area is larger than that of each of the sealing members. 5% of seal area.

Preferably, the underground compressed air energy storage chamber that can resist large deformation also includes a plug (6),

The plug (6) is arranged on the periphery of the air inlet and the exhaust port, and wraps the air inlet pipe (9) and the air outlet pipe (8) therein.

Preferably, the air inlet pipe (9) is arranged in an inclined manner from the air inlet to the air generating mechanism; the exhaust pipe (8) is arranged in an inclined manner from the air outlet to the air using mechanism.

The underground compressed air energy storage chamber provided by the present invention that can resist large deformation is provided with a bending sealing layer 2 in the gas storage space formed inside the lining layer 2. When the underground rock 1 cavity or the lining layer 2 is deformed, due to the bending The sealing layer 2 can use its own bending to compensate for the deformation of the underground rock 1 cavity or lining layer 2 along with the deformation of the underground rock 1 cavity or lining layer 2. Therefore, even if the rock or lining layer around the energy storage chamber occurs Even in the case of deformation and fracture, it can still maintain high sealing performance and reduce gas leakage in underground compressed air energy storage chambers.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the invention. Also throughout the drawings, the same reference characters are used to designate the same components. In the attached picture:

Figure 1 is a typical cross-sectional schematic diagram of an underground compressed air energy storage chamber that can resist large deformation provided by an embodiment of the present invention;

Figure 2 is a partial enlarged view of part A in Figure 1;

Figure 3 is a partial enlarged view of part B in Figure 1;

Figure 4 is a partial enlarged view of part C in Figure 1;

Figure 5 is a cross-sectional view along E-E direction of Figure 1;

Figure 6 is a partial enlarged view of part D in Figure 5;

Explanation of reference symbols:

1-rock, 2-lining layer, 3-bent sealing layer, 4-strip sealing device, 5-first fixing piece, 6-plug, 8-exhaust pipe, 9-inlet pipe, 10-motor, 11-air compressor, 12-first valve, 13-second valve, 14 air expander, 15-generator.

Detailed ways

In view of this, the present invention provides an underground compressed air energy storage chamber that can resist large deformation, and can still maintain a high seal even when the rocks or lining layers around the energy storage chamber are deformed or broken. performance, reducing gas leakage in underground compressed air energy storage chambers, making it more suitable for practical use.

After painstaking efforts, the inventor discovered that

During the multiple high-pressure filling and deflation processes of underground compressed air energy storage chambers, the frequent alternation of stress may induce large deformation of the surrounding rock, resulting in varying degrees of fractures in the sealing layer, concrete lining and surrounding rock of the chamber. It can even be completely destroyed, causing a large amount of leakage of high-pressure gas, seriously affecting the energy storage efficiency of the reservoir. Therefore, the sealing layer, as a key structure to prevent gas leakage in the compressed air energy storage chamber, not only needs to ensure the sealing performance of the storage chamber under normal conditions, but also needs to be used when there is local large deformation of the surrounding rock and local cracking of the surrounding rock and concrete lining. The sealing layer can still have high sealing properties while undergoing coordinated deformation.

In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended purpose of the invention, the following is a description of an underground compressed air energy storage chamber that can resist large deformation and is proposed according to the present invention in conjunction with the drawings and preferred embodiments. Its specific implementation, structure, characteristics and efficacy are described in detail below. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, or characteristics of one or more embodiments may be combined in any suitable combination.

The term "and/or" in this article is just an association relationship describing related objects, indicating that there can be three relationships, for example, A and/or B. The specific understanding is: A and B can be included at the same time, or they can be alone A exists, or B exists alone, and it can have any of the above three situations.

Referring to Figures 1 to 6, the underground compressed air energy storage chamber that can resist large deformation provided by the embodiment of the present invention includes a lining layer 2, a bending sealing layer 3, an air inlet pipe 9, and an exhaust pipe 8. The lining layer 2 is arranged inside the cavity of the underground rock 1, so that a gas storage space is formed inside the lining layer 2; the bending sealing layer 3 is arranged on the inner wall of the lining layer 2, so that the gas storage space is sealed by the bending sealing layer 3; the lining layer 2 The bending sealing layer 3 is provided with an air inlet and an exhaust port at corresponding positions. One end of the air inlet pipe 9 is fixedly connected to the air inlet, and the other end of the air inlet pipe 9 is connected to the air generating mechanism. Through the air inlet pipe 9, the air The compressed air generated by the generating mechanism can enter the air storage space. One end of the exhaust pipe 8 is fixedly connected to the exhaust port, and the other end of the exhaust pipe 8 is connected to the air using mechanism. Through the exhaust pipe 8, the air in the air storage space of compressed air can be delivered to the air-using mechanism.

The underground compressed air energy storage chamber provided by the present invention that can resist large deformation is provided with a bending sealing layer 2 in the gas storage space formed inside the lining layer 2. When the underground rock 1 cavity or the lining layer 2 is deformed, due to the bending The sealing layer 2 can use its own bending to compensate for the deformation of the underground rock 1 cavity or lining layer 2 along with the deformation of the underground rock 1 cavity or lining layer 2. Therefore, even if the rock or lining layer around the energy storage chamber occurs Even in the case of deformation and fracture, it can still maintain high sealing performance and reduce gas leakage in underground compressed air energy storage chambers. In this embodiment, a coupling sealing method of bending a high-toughness anti-seepage membrane and a flexible geotechnical material is used, and the anti-seepage membrane is bent and embedded in the flexible geotechnical material to form a sealed composite body. The flexible geotechnical material can be flexible concrete or asphalt. class material. The advantage of this sealing method is that when the surrounding rock undergoes large local deformation, the bent anti-seepage membrane embedded in the flexible geotechnical material will gradually expand as the surrounding rock deforms, and the material still has a certain degree of elasticity after reaching the expansion limit. The elongation rate can ensure the sealing performance under the deformation state of the surrounding rock. The high-toughness anti-seepage membrane arranged in a bent manner and the flexible geotechnical material coupled sealing layer coordinately deform together with the surrounding rock and concrete lining. The bent anti-seepage membrane still has a certain elongation when fully expanded. Good ductility allows the surrounding rock to remain sealed despite deformation. During the operation of the compressed air energy storage system, the cyclic charging and deflating process is also the loading and unloading process of the surrounding rock, which will inevitably lead to cumulative plastic deformation of the surrounding rock and damage the surrounding rock of the shallow underground compressed air energy storage chamber. The overall stability may produce a certain degree of cracks and varying degrees of large deformation. Due to the special properties of the sealing layer coupled with the flexible high-toughness anti-seepage membrane and flexible geotechnical materials, although it will deform to a certain extent as the pressure increases, it will not change with the increase of pressure due to its certain elongation. Even if the surrounding rock and concrete lining are damaged, it will not cause gas leakage, so that the sealing performance of the chamber always remains stable.

Among them, the underground compressed air energy storage chamber that can resist large deformation also includes a first fixing part 5 . The lining layer 2 is fixed to the inner wall of the cavity of the underground rock 1 through the first fixing member 5 . In this case, the connection between the lining layer 2 and the cavity of the underground rock 1 is closer. Since the underground rock 1 itself has high strength, the possibility of deformation and fracture of the lining layer 2 can be reduced, and the embodiment of the present invention can be extended. The service life of the underground compressed air energy storage chamber that can resist large deformation is provided.

Wherein, the first fixing member 5 is an anchor rod, the fixed end of the anchor rod is arranged on the lining layer 2 , and the anchoring section of the anchor rod is arranged in the rock 1 . In this case, since the anchor rod can form an anchoring section inside the underground rock 1, the connection between the lining layer 2 and the inner wall of the cavity of the underground rock 1 can be made more reliable.

The air generating mechanism includes an electric motor 10 , an air compressor 11 and a first valve 12 . The electric motor 10 is used to control the air compressor 11 to generate compressed air. The first valve 12 is provided on the air inlet pipe 9 and is used to control the communication or sealing of the air inlet pipe 9 connected from the air compressor 11 to the air inlet. In this case, the amount of compressed air stored in the air storage space can be controlled by connecting or closing the first valve 12 .

Among them, the air-using mechanism includes a second valve 13, an air expander 14 and a generator 15. The second valve 13 is provided on the exhaust pipe and is used to control the connection or sealing of the exhaust pipe 8 connected from the exhaust port to the air expander 14. The generator 15 is used to generate electricity using the air from the air expander 14. . In this case, the second valve 13 can be opened when needed, so that the air after passing through the air expander 14 can be recycled by the generator 15 to store energy.

Among them, the underground compressed air energy storage chamber that can resist large deformation also includes a strip sealing device 4. The bending sealing layer 3 includes multiple sealing members, and the multiple sealing members are connected into one body by a strip sealing device 4 . In this case, the bent sealing layer 3 can be obtained more conveniently by utilizing the technical solution of connecting multiple pieces of sealing members into one body through the strip-shaped sealing device 4 .

Among them, after the multiple seals are connected into one body through the strip sealing device 4, the total area is 2-3 times the total area of the inner wall of the gas storage space. In this case, even if the lining layer 2 or the surrounding rock 1 is greatly deformed, the bent sealing layer 3 formed by connecting multiple sealing members together through the strip sealing device 4 can avoid the gas storage space. Internally stored compressed air leaks.

Wherein, after the plurality of sealing members are connected into one body through the strip sealing device 4, the connection between the sealing members has an overlapping area, and the area of the overlapping area is greater than 5% of the area of each sealing member. In this case, even if a local fracture occurs in the surrounding rock 1 or the lining layer 2, the overlapping area between the joints of the multiple seals of the flexible sealing layer 3 can compensate for the compressed air leakage caused by the local fracture.

Among them, the underground compressed air energy storage chamber that can resist large deformation also includes a plug 6. The plug 6 is arranged on the periphery of the air inlet and the exhaust port, and wraps the air inlet pipe 9 and the air outlet pipe 8 therein. In this case, the leakage of the compressed air stored in the air storage space from the air inlet can be reduced or avoided, thereby avoiding stress concentration; at the same time, the plug 6 blocks the entire air inlet and exhaust area to prevent the compressed air from leaking. Impact damage to the gas inlet and outlet.

Among them, the air intake pipe 9 is arranged in an inclined manner from the air inlet to the air generating mechanism; the exhaust pipe 8 is arranged in an inclined manner from the air outlet to the air using mechanism. In this case, the stroke of air entering the air storage space from the air intake pipe 9 or when the air is discharged from the air storage space through the exhaust pipe 8 can be lengthened, thereby further reducing the leakage of compressed air in the air storage space.

Although the preferred embodiments of the present invention have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are apparent. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (10)

1. An underground compressed air energy storage chamber that can resist large deformation, characterized by including a lining layer (2), a bending sealing layer (3), an air inlet pipe (9), and an exhaust pipe (8), The lining layer (2) is arranged inside the cavity of the underground rock (1), so that a gas storage space is formed inside the lining layer (2); The bending sealing layer (3) is provided on the inner wall of the lining layer (2), so that the air storage space is sealed by the bending sealing layer (3); The lining layer (2) and the bending sealing layer (3) are provided with air inlets and exhaust ports at corresponding positions. One end of the air inlet pipe (9) is fixedly connected to the air inlet, and the other end of the air inlet pipe (9) is connected to the air generating mechanism. Through the air inlet pipe (9), the air generated by the air generating mechanism is Compressed air can enter the air storage space, One end of the exhaust pipe (8) is fixedly connected to the exhaust port, and the other end of the exhaust pipe (8) is connected to the air using mechanism. Through the exhaust pipe (8), the gas storage The compressed air in the space can be delivered to the air-using mechanism. 2. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 1, characterized in that it also includes a first fixing member (5), The lining layer (2) is fixed to the inner wall of the underground rock (1) cavity through the first fixing member (5). 3. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 2, characterized in that the first fixing member (5) is an anchor rod, and the fixed end of the anchor rod is provided on the Lining layer (2), the anchoring section of the anchor rod is arranged in the rock (1). 4. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 1, characterized in that the air generating mechanism includes an electric motor (10), an air compressor (11) and a first valve (12) , The electric motor (10) is used to control the air compressor (11) to generate compressed air, The first valve (12) is provided on the air inlet pipe (9) and is used to control the communication or sealing of the air inlet pipe (9) from the air compressor (11) to the air inlet. . 5. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 1, characterized in that the air using mechanism includes a second valve (13), an air expander (14) and a generator (15) ), The second valve (13) is provided on the exhaust pipe and is used to control the communication or sealing of the exhaust pipe (8) connected from the exhaust port to the air expander (14), The generator (15) is used to generate electricity using air from the air expander (14). 6. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 1, characterized in that it also includes a strip sealing device (4), The bent sealing layer (3) includes a plurality of sealing members, and the plurality of sealing members are connected as a whole through the strip sealing device (4). 7. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 6, characterized in that after the plurality of sealing members are connected into one body through the strip sealing device (4), the total The area is 2-3 times the total area of the inner wall of the gas storage space. 8. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 6, characterized in that after the plurality of sealing members are connected into one body through the strip sealing device (4), each sealing member The connection between the seals has an overlapping area, and the area of the overlapping area is greater than 5% of the area of each seal. 9. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 1, characterized in that it also includes a plug (6), The plug (6) is arranged on the periphery of the air inlet and the exhaust port, and wraps the air inlet pipe (9) and the air outlet pipe (8) therein. 10. The underground compressed air energy storage chamber capable of resisting large deformation according to claim 1, characterized in that the air inlet pipe (9) is arranged in an inclined manner from the air inlet to the air generating mechanism; The exhaust pipe (8) is arranged in an inclined manner from the air outlet to the air using mechanism.