Gas storage cavity well structure

Abstract

The invention discloses a gas storage cavity well structure which comprises a salt cavern cavity well, end sealing parts are arranged at the two ends of the salt cavern cavity well, the two ends of the salt cavern cavity well are sealed through the end sealing parts to form a gas storage cavity well, a gas injection and production well communicated with the ground surface is arranged in the middle of the gas storage cavity well, and the gas storage cavity well and the gas injection and production well are of a y-shaped structure. A top sealing part is arranged in the gas injection and recovery well, and sealing structures are arranged on the inner side of the gas storage cavity well and the inner side of the gas injection and recovery well. The waste salt cavern is used for manufacturing gas storage equipment, waste resources are reasonably utilized, and meanwhile the cost of compressed air energy storage is reduced; through different structural layers, high polymer materials and the like, the waterproof, anti-corrosion and sealing performance is high, electronic elements are used for monitoring, connection with a factory control room can be achieved, real-time monitoring is achieved, and safety is guaranteed.

Description

Technical Field

[0001] The invention relates to a gas storage cavity well structure and belongs to the technical field of energy storage equipment. Background Art

[0002] Compressed air energy storage technology is a new type of energy storage technology, which refers to storing a large amount of renewable energy by compressing air under high pressure, and then storing it in a gas storage device. During non-peak electricity consumption periods, such as at night or on weekends, a motor drives a compressor to compress air into a gas storage chamber for storage; then, during peak electricity consumption periods, such as during the day, the kinetic energy of the gas is released to generate electricity. However, the construction and manufacturing costs of the gas storage chamber equipment in the prior art are huge.

[0003] my country is rich in salt cavern resources, with an existing salt cavern area of ​​about 1.3x108m 3 Most of them have good sealing performance after cavity creation, but the currently used salt caverns only account for 0.2% of the total, and most of them are idle. How to effectively utilize them has become an urgent problem to be solved. Therefore, we invented a gas storage cavity well structure using the abandoned salt cavern chamber. Summary of the invention

[0004] The purpose of the present invention is to provide a gas storage chamber well structure, which utilizes abandoned salt caverns to manufacture gas storage equipment, rationally utilizes waste resources, reduces the cost of compressed air energy storage, and has strong waterproof and anti-corrosion sealing properties, real-time monitoring, and ensures safety.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a gas storage chamber well structure, including a salt cavern chamber well, utilizing an abandoned salt cavern chamber well, selecting parts with suitable structure and shape, and providing end sealing parts at both ends of the salt cavern chamber well, the end sealing parts seal the two ends of the salt cavern chamber well to form a gas storage chamber well, the gas storage chamber well is used for gas storage, a gas injection and production well connected to the surface is provided in the middle of the gas storage chamber well, and the gas storage chamber well and the gas injection and production well are in a "y"-shaped structure, which is convenient for construction and subsequent operation and maintenance, a top sealing part is provided inside the gas injection and production well, so that the gas storage chamber well after gas storage is completely sealed, and a sealing structure is provided on the inner side of the gas storage chamber well and the injection and production gas well.

[0006] The aforementioned gas storage chamber well structure, the sealing structure includes a reinforcement layer, the reinforcement layer is placed on the inner wall of the gas storage chamber well / injection and production gas well, the reinforcement layer reinforces, levels and repairs the inner wall of the gas storage chamber well / injection and production gas well, a lining layer is arranged on the inner side of the reinforcement layer, a sliding layer is arranged on the inner side of the lining layer to reduce constraints on the structure, thereby reducing temperature stress, and a sealing layer is arranged on the inner wall of the sliding layer to ensure complete sealing.

[0007] In the aforementioned gas storage cavity well structure, anchor rods are embedded in the surrounding rock of the gas storage cavity well / injection and production gas well, and the inner ends of the anchor rods extend inwardly to the reinforcement layer to enhance the structural strength of the reinforcement layer.

[0008] In the aforementioned gas storage chamber well structure, a drainage pipe is pre-installed in the reinforcement layer. The drainage pipe is arranged in a surrounding manner and connected to an external drainage system. While facilitating the operation of the drainage system, the surrounding drainage pipe can cool down the high-pressure gas and improve the gas storage efficiency.

[0009] The aforementioned air storage chamber well structure, the inner cavity of the air storage chamber well is provided with multiple sealing pistons, the multiple sealing pistons divide the air storage chamber well into multiple air storage partitions, the multiple air storage partitions are each provided with an air storage pipeline connected thereto, and the air storage pipeline passes through the injection and production gas well and is connected to an external compressor, the compressor can compress air and transport it to each air storage partition through the air storage pipeline for zoned air storage, the multiple air storage partitions are each provided with an air pressure monitoring device, and the air pressure monitoring device is connected to an external control system, which can monitor the real-time air pressure of each air storage partition, and monitor in real time to ensure safety.

[0010] In the aforementioned air storage chamber well structure, the reinforcement layer is anchor sprayed concrete.

[0011] In the aforementioned gas storage chamber well structure, the lining layer is constructed of concrete, and steel bars are embedded in the lining layer to improve the structural strength of the lining layer and prevent cracking.

[0012] In the aforementioned air storage chamber well structure, the sealing layer is made of butyl rubber and / or fiberglass.

[0013] Compared with the prior art, the present invention utilizes abandoned salt caverns to manufacture gas storage equipment, which rationally utilizes waste resources while reducing the cost of compressed air energy storage; the present invention achieves strong waterproof, anti-corrosion and sealing properties through different structural layers and the use of polymer materials; the present invention utilizes electronic components for monitoring and can be connected to the plant control room for real-time monitoring to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the sealing structure of the present invention.

[0016] Figure numerals: 1-end sealing part, 2-gas storage chamber well, 3-gas injection and production well, 4-top sealing part, 5-sealing structure, 6-reinforcement layer, 7-lining layer, 8-sliding layer, 9-sealing layer, 10-anchor rod, 11-drain pipe, 12-sealing piston, 13-gas storage partition, 14-gas storage pipeline, 15-compressor, 16-air pressure monitoring device.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0018] Embodiment 1 of the present invention: A gas storage chamber well structure includes a salt cavern chamber well. An abandoned salt cavern chamber well is utilized, and parts with suitable structure and shape are selected. End sealing parts 1 are arranged at both ends of the salt cavern chamber well. The end sealing parts 1 seal the two ends of the salt cavern chamber well to form a gas storage chamber well 2. The gas storage chamber well 2 is used for storing gas. An injection and production gas well 3 connected to the surface is arranged in the middle of the gas storage chamber well 2, and the gas storage chamber well 2 and the injection and production gas well 3 are in a "y"-shaped structure, which is convenient for construction and subsequent operation and maintenance. A top sealing part 4 is arranged inside the injection and production gas well 3 to completely seal the gas storage chamber well 2 after gas storage. A sealing structure 5 is arranged on the inner side of the gas storage chamber well 2 and the injection and production gas well 3.

[0019] Embodiment 2 of the present invention: A gas storage chamber well structure includes a salt cavern chamber well. An abandoned salt cavern chamber well is utilized, and parts with suitable structure and shape are selected. End sealing parts 1 are arranged at both ends of the salt cavern chamber well. The end sealing parts 1 seal the two ends of the salt cavern chamber well to form a gas storage chamber well 2. The gas storage chamber well 2 is used for gas storage. An injection and production gas well 3 connected to the surface is arranged in the middle of the gas storage chamber well 2, and the gas storage chamber well 2 and the injection and production gas well 3 are in a "y"-shaped structure, which is convenient for construction and subsequent operation and maintenance. A top sealing part 4 is arranged inside the injection and production gas well 3 to completely seal the gas storage chamber well 2 after gas storage. A sealing structure 5 is arranged on the inner side of the gas storage chamber well 2 and the injection and production gas well 3.

[0020] Among them, the sealing structure 5 includes a reinforcement layer 6, which is placed on the inner wall of the gas storage chamber well 2 / injection and production gas well 3. The reinforcement layer 6 reinforces, levels and repairs the inner wall of the gas storage chamber well 2 / injection and production gas well 3. A lining layer 7 is arranged on the inner side of the reinforcement layer 6, and a sliding layer 8 is arranged on the inner side of the lining layer 7 to reduce the constraint on the structure, thereby reducing temperature stress. The inner wall of the sliding layer 8 is provided with a sealing layer 9 to ensure complete sealing; an anchor rod 10 is embedded in the surrounding rock of the gas storage chamber well 2 / injection and production gas well 3, and the inner end of the anchor rod 10 extends inwardly to the reinforcement layer 6 to enhance the structural strength of the reinforcement layer 6.

[0021] Embodiment 3 of the present invention: A gas storage chamber well structure includes a salt cavern chamber well. An abandoned salt cavern chamber well is utilized, and parts with suitable structure and shape are selected. End sealing parts 1 are arranged at both ends of the salt cavern chamber well. The end sealing parts 1 seal the two ends of the salt cavern chamber well to form a gas storage chamber well 2. The gas storage chamber well 2 is used for storing gas. An injection and production gas well 3 connected to the surface is arranged in the middle of the gas storage chamber well 2, and the gas storage chamber well 2 and the injection and production gas well 3 are in a "y"-shaped structure, which is convenient for construction and subsequent operation and maintenance. A top sealing part 4 is arranged inside the injection and production gas well 3 to completely seal the gas storage chamber well 2 after gas storage. A sealing structure 5 is arranged on the inner side of the gas storage chamber well 2 and the injection and production gas well 3.

[0022] Among them, the sealing structure 5 includes a reinforcement layer 6, which is anchor sprayed concrete. The reinforcement layer 6 is placed on the inner wall of the air storage chamber well 2 / injection and production gas well 3. The reinforcement layer 6 reinforces, levels and repairs the inner wall of the air storage chamber well 2 / injection and production gas well 3. A lining layer 7 is arranged on the inner side of the reinforcement layer 6. The lining layer 7 is made of concrete, and steel bars are implanted in the lining layer 7 to improve the structural strength of the lining layer 7 and prevent cracking. A sliding layer 8 is arranged on the inner side of the lining layer 7 to reduce the constraint on the structure, thereby reducing temperature stress. A sealing layer 9 is arranged on the inner wall of the sliding layer 8. The sealing layer 9 is made of butyl rubber and / or fiberglass to ensure complete sealing. Anchor rods 10 are embedded in the surrounding rock of the air storage chamber well 2 / injection and production gas well 3, and the inner end of the anchor rod 10 extends inward to the reinforcement layer 6 to strengthen the structural strength of the reinforcement layer 6.

[0023] A drainage pipe 11 is pre-installed in the reinforcement layer 6. The drainage pipe 11 is arranged in a surrounding manner and connected to an external drainage system. While facilitating the operation of the drainage system, the surrounding drainage pipe 11 can cool the high-pressure gas and improve the gas storage efficiency.

[0024] Embodiment 4 of the present invention: A gas storage chamber well structure includes a salt cavern chamber well. An abandoned salt cavern chamber well is utilized, and parts with suitable structure and shape are selected. End sealing parts 1 are arranged at both ends of the salt cavern chamber well. The end sealing parts 1 seal the two ends of the salt cavern chamber well to form a gas storage chamber well 2. The gas storage chamber well 2 is used for storing gas. An injection and production gas well 3 connected to the surface is arranged in the middle of the gas storage chamber well 2, and the gas storage chamber well 2 and the injection and production gas well 3 are in a "y"-shaped structure, which is convenient for construction and subsequent operation and maintenance. A top sealing part 4 is arranged inside the injection and production gas well 3 to completely seal the gas storage chamber well 2 after gas storage. A sealing structure 5 is arranged on the inner side of the gas storage chamber well 2 and the injection and production gas well 3.

[0025] The inner cavity of the gas storage chamber well 2 is provided with multiple sealing pistons 12, and the multiple sealing pistons 12 divide the gas storage chamber well 2 into multiple gas storage partitions 13. The multiple gas storage partitions 13 are each provided with a gas storage pipeline 14 connected thereto, and the gas storage pipeline 14 passes through the injection and production gas well 3 and is connected to an external compressor 15. The compressor 15 can compress air and transport it to each gas storage partition 13 through the gas storage pipeline 14 for partitioned gas storage. The multiple gas storage partitions 13 are each provided with an air pressure monitoring device 16, and the air pressure monitoring device 16 is connected to an external control system, which can monitor the real-time air pressure of each gas storage partition 13, and monitor in real time to ensure safety.

[0026] Among them, the sealing structure 5 includes a reinforcement layer 6, which is anchor sprayed concrete. The reinforcement layer 6 is placed on the inner wall of the air storage chamber well 2 / injection and production gas well 3. The reinforcement layer 6 reinforces, levels and repairs the inner wall of the air storage chamber well 2 / injection and production gas well 3. A lining layer 7 is arranged on the inner side of the reinforcement layer 6. The lining layer 7 is made of concrete, and steel bars are implanted in the lining layer 7 to improve the structural strength of the lining layer 7 and prevent cracking. A sliding layer 8 is arranged on the inner side of the lining layer 7 to reduce the constraint on the structure, thereby reducing temperature stress. A sealing layer 9 is arranged on the inner wall of the sliding layer 8. The sealing layer 9 is made of butyl rubber and / or fiberglass to ensure complete sealing. Anchor rods 10 are embedded in the surrounding rock of the air storage chamber well 2 / injection and production gas well 3, and the inner end of the anchor rod 10 extends inward to the reinforcement layer 6 to strengthen the structural strength of the reinforcement layer 6.

[0027] A drainage pipe 11 is pre-installed in the reinforcement layer 6. The drainage pipe 11 is arranged in a surrounding manner and connected to an external drainage system. While facilitating the operation of the drainage system, the surrounding drainage pipe 11 can cool the high-pressure gas and improve the gas storage efficiency.

[0028] The working principle of an embodiment of the present invention is as follows: the present invention utilizes abandoned salt caverns to construct a Y-shaped artificial chamber, wherein the inclined shaft serves as an injection and production gas well 3, and the bottom horizontal section serves as a gas storage cavity 2, and a sealing structure 5 is constructed inside the gas storage cavity 2 and the injection and production gas well 3 for transformation to ensure their structural stability and sealing. After the transformation, a sealing piston 12 is arranged in the gas storage cavity 1 for partitioning, and a gas storage pipeline 14 and an air pressure monitoring device 16 are installed. The air tightness of each partition of the gas storage cavity 12 is tested in turn. After the test is qualified, the injection and production gas well 3 is sealed by the top sealing part 4 to form a gas storage reservoir, and the gas is input by a compressor 15 for gas storage. The pressure monitoring device 16 is used to monitor the data of each gas storage partition 13 in real time to monitor the air tightness of each area.

Claims

1. A gas storage cavity well structure, including a salt cavern cavity well, characterized in that: End sealing parts (1) are arranged at both ends of the salt cavern cavity well, and the end sealing parts (1) seal the two ends of the salt cavern cavity well to form a gas storage cavity well (2). A gas injection and production well (3) connected to the ground surface is arranged in the middle of the gas storage cavity well (2), and the gas storage cavity well (2) and the gas injection and production well (3) are in a "Y"-shaped structure. A top sealing part (4) is arranged inside the gas injection and production well (3), and a sealing structure (5) is arranged inside the gas storage cavity well (2) and the gas injection and production well (3).

2. The gas storage chamber well structure according to claim 1, characterized in that: The sealing structure (5) comprises a reinforcement layer (6), the reinforcement layer (6) being arranged on the inner wall of the gas storage chamber well (2) / the gas injection and production well (3), a lining layer (7) being arranged on the inner side of the reinforcement layer (6), a sliding layer (8) being arranged on the inner side of the lining layer (7), and a sealing layer (9) being arranged on the inner wall of the sliding layer (8).

3. The gas storage chamber well structure according to claim 1, characterized in that: An anchor rod (10) is embedded in the surrounding rock of the gas storage cavity well (2) / gas injection and production well (3), and the inner end of the anchor rod (10) extends inwardly through the reinforcement layer (6) to the rock and soil layer around the cavity well.

4. The gas storage chamber well structure according to claim 3, characterized in that: A drainage pipe (11) is pre-installed in the reinforcement layer (6), and the drainage pipe (11) is arranged in a circumferential manner and is connected to an external drainage system.

5. The gas storage chamber well structure according to claim 1, characterized in that: The inner cavity of the gas storage chamber well (2) is provided with a plurality of sealing pistons (12), and the plurality of sealing pistons (12) divide the gas storage chamber well (2) into a plurality of gas storage partitions (13). The plurality of gas storage partitions (13) are each provided with a gas storage pipeline (14) connected thereto, and the gas storage pipeline (14) passes through the injection and production gas well (3) and is connected to an external compressor (15). The plurality of gas storage partitions (13) are each provided with an air pressure monitoring device (16), and the air pressure monitoring device (16) is connected to an external control system.

6. The gas storage chamber well structure according to claim 2, characterized in that: The reinforcement layer (6) is anchor shotcrete.

7. The gas storage chamber well structure according to claim 2, characterized in that: The lining layer (7) is constructed of concrete, and steel bars are embedded in the lining layer (7).

8. The gas storage chamber well structure according to claim 2, characterized in that: The sealing layer (9) is made of butyl rubber and / or glass fiber reinforced plastic.

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