Tube bundle gas storage device with honeycomb structure

Abstract

The utility model provides a honeycomb structure tube bundle gas storage device which comprises a shell of a steel concrete structure, a plurality of main energy storage tanks are arranged in the shell, the central axes of the main energy storage tanks are parallel to one another and extend in the horizontal direction, the adjacent main energy storage tanks are arranged in a regular triangle shape, and high-strength and high-toughness concrete is poured between the adjacent main energy storage tanks. The outer wall of each main energy storage tank is wrapped with high-strength and high-toughness concrete; pre-stressed anchor cables are arranged among the three adjacent main energy storage tanks in the central axis direction of the main energy storage tanks, and the two ends of each pre-stressed anchor cable are fixed to the opposite outer walls of the shell respectively; all the main energy storage tanks are cylindrical and are the same in outer diameter. According to the device, the regular triangle arrangement is adopted, the space utilization rate is high, the high-strength and high-toughness concrete is used for wrapping all the main energy storage tanks, the main energy storage tanks and the shell form an integrated structure, the device is of a self-stabilizing structure, the wall thickness of the main energy storage tanks can be reduced, and therefore the construction cost of the device is reduced.

Description

Technical Field

[0001] The utility model relates to a tube bundle gas storage device with a honeycomb structure. Background Art

[0002] Compressed air energy storage technology is a newly emerging energy storage technology in recent years. It has the characteristics of high density, long life, high efficiency, and flexible layout, can increase the peak shaving capacity of the power grid, and improve the stability of power supply of the power grid. Compressed air energy storage technology mainly includes four systems: an air compression system, a heat storage system, a gas storage system, and a power generation system. Among them, the gas storage system is the main component of compressed air energy storage technology. The gas storage reservoirs of the gas storage system include various forms such as salt caverns, artificial chambers, and ground high-pressure gas tanks. Among them, salt cavern gas storage has the advantages of low construction cost, small floor area, short construction period, mature technology, good sealing performance, etc., but the site selection has great limitations, and due to the influence of the alternating stress generated during gas charging and discharging on the salt cavern wall, the long-term stability still needs to be further verified. Artificial chambers have the advantages of flexible site selection, large pressure selection range and available fluctuation range, high system conversion efficiency, easy maintenance, etc., but the buried depth is often relatively deep and the cost is high. The ground high-pressure gas tank uses a metal material pressure vessel or other material gas storage bin as the gas storage device, and a gas storage system is composed of multiple groups of high-pressure storage tanks connected in parallel. Due to the high safety requirements and high cost of high-pressure storage tanks, it restricts the industrial development of it. Due to the restrictions of the above various reasons, the further development of compressed air energy storage technology is restricted. Therefore, how to reduce the construction cost of compressed air energy storage facilities is still a key issue in compressed air energy storage technology. Content of the Utility Model

[0003] To solve the problem of high construction cost of compressed air energy storage facilities, the present application proposes a tube bundle gas storage device with a honeycomb structure, which includes a steel-concrete structure shell. A number of main energy storage tanks are arranged in the shell. The central axes of the main energy storage tanks are parallel to each other and extend in the horizontal direction. Adjacent main energy storage tanks are arranged in an equilateral triangle. High-strength and high-toughness concrete is poured between adjacent main energy storage tanks, and high-strength and high-toughness concrete is wrapped on the outer wall of each main energy storage tank; along the central axis direction of the main energy storage tank, prestressed anchor cables are arranged between three adjacent main energy storage tanks, and both ends of the prestressed anchor cable are respectively fixed on the opposite outer walls of the shell; each main energy storage tank is cylindrical and has the same outer diameter, and the outer diameter of the main energy storage tank is 500 - 1500 mm.

[0004] When the tube bundle gas storage device with a honeycomb structure in the present application is constructed, the following steps are adopted:

[0005] (1) Construct the bottom plate and outer wall of the shell;

[0006] (2) Arrange each layer of main energy storage tanks and anchor cables;

[0007] (3) Pour high-strength and high-toughness concrete. After the outer wall and the high-strength and high-toughness concrete both reach the design strength, tension the anchor cables layer by layer to generate prestress and form prestressed anchor cables, and then lock the prestressed anchor cables on the outer wall.

[0008] (4) Construct the top plate of the outer shell.

[0009] In this application, adjacent main energy storage tanks are arranged in an equilateral triangle, making the device have a honeycomb structure, and this application has the following advantages:

[0010] High material utility: Use high-strength and high-toughness concrete to wrap each main energy storage tank into one, and can strengthen each main energy storage tank, providing an additional guarantee for the main energy storage tank. Thus, the wall thickness of the main energy storage tank can be reduced. In the axial direction, due to the friction effect, the high-strength and high-toughness concrete can also restrain the main energy storage tank, and further reduce the construction cost of the device. The high strength and high toughness of the high-strength and high-toughness concrete make the main energy storage tank and the outer shell form an integral structure.

[0011] Good heat insulation performance: Utilize the heat insulation performance of high-strength and high-toughness concrete to effectively prevent the heat in the stored energy air from being transferred outward and improve the energy storage efficiency.

[0012] Good corrosion resistance and durability: Utilize the wrapping effect of high-strength and high-toughness concrete to provide anti-corrosion protection for the main energy storage tank, isolate external water vapor and corrosive substances, improve the corrosion resistance of the main energy storage tank, and extend the service life of the main energy storage tank.

[0013] Strong customizability: It can be modularly designed according to project conditions, and develop a high-pressure gas storage system with a scale of 10 - 20 MPa and 0.5 - 150,000 m 3 ³.

[0014] Specifically, for the convenience of construction, the several main energy storage tanks are arranged in several layers along the vertical direction.

[0015] Specifically, the adjacent main energy storage tanks are arranged at intervals, and the net distance between adjacent main energy storage tanks is 50 - 200 mm. If the gap between adjacent main energy storage tanks is too narrow, the high-strength and high-toughness concrete cannot smoothly reach the triangular area formed between each main energy storage tank, which will cause holes in some areas. Seriously, the high-strength and high-toughness concrete in some areas cannot be connected to each other, making the high-strength and high-toughness concrete unable to form a complete wrapping effect on the main energy storage tank and reducing the gas storage pressure of the main energy storage tank. If the gap between adjacent main energy storage tanks is too wide, although the strength of the main energy storage tank can be further improved, the too thick high-strength and high-toughness concrete has exceeded the required strength, and it will also reduce the gas storage space per unit volume.

[0016] Further, to make full use of the space inside the outer shell, auxiliary energy storage tanks are arranged in the empty space area formed between the outermost main energy storage tank and the outer wall of the outer shell, and the outer diameter of the auxiliary energy storage tank is smaller than that of the main energy storage tank.

[0017] To further reduce the construction cost, along the radial direction of the main energy storage tank, the inner cavity of the outer shell is divided into at least two sequentially sleeved tank areas from the inside to the outside. In two adjacent tank areas, the wall thickness of the main energy storage tank in the outer tank area is greater than that of the main energy storage tank in the inner tank area. Under the wrapping effect of the high-strength and high-toughness concrete, from the center of the outer shell to the outside, the overall thickness of the high-strength and high-toughness concrete becomes thicker and thicker, which can provide greater strength protection for the internal main energy storage tank. Therefore, the wall thickness of the inner main energy storage tank can be reduced, and thus the construction cost of the entire device can be reduced.

[0018] For the same reason, to further reduce the construction cost of the device, in the same tank area, along the radial direction of the main energy storage tank, among two adjacent main energy storage tanks, the wall thickness of the main energy storage tank on the outside is greater than that of the main energy storage tank on the inside.

[0019] Further, to improve the strength of the outer shell in the radial direction of the main energy storage tank and further improve the safety of the device, binding ribs are provided on the outer shell, and the binding ribs extend around the outer shell along a vertical plane perpendicular to the central axis of the main energy storage tank. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0021] Figure 2 is Figure 1 the top view of

[0022] Figure 3 is Figure 1 the view in the A-A direction of

[0023] Figure 4 is the layout detail drawing of the main energy storage tank.

[0024] Figure 5 is a tube bundle gas storage device with a fully underground structure.

[0025] Figure 6 is a tube bundle gas storage device with a semi-underground structure.

[0026] Figure 7 is a tube bundle gas storage device with a ground structure. Detailed Embodiment

[0027] The structure of the honeycomb-structured tube bundle gas storage device will be described below. Please refer to Figures 1-3The tube bundle gas storage device includes a shell 10 of a steel concrete structure, and the shell 10 specifically includes a bottom plate 11, four outer walls 12 cast on the bottom plate 11, and a top plate 13 cast on the top of the outer walls 12. When viewed in the vertical direction, the four outer walls are arranged in a rectangular shape, so that the shell has a rectangular inner cavity.

[0028] Several main energy storage tanks 211 are arranged in the inner cavity of the shell. Each main energy storage tank 211 is cylindrical and has the same outer diameter. The central axes of each main energy storage tank 211 are parallel to each other and extend in the horizontal direction. They are arranged in five layers, of which three layers include nine main energy storage tanks 211, and the other two layers include eight main energy storage tanks 211. Adjacent main energy storage tanks are arranged in an equilateral triangle, and high-strength and high-toughness concrete is poured in the shell. The outer wall of each main energy storage tank is wrapped with high-strength and high-toughness concrete. In the accompanying drawings, the high-strength and high-toughness concrete is not shown. Adjacent main energy storage tanks are arranged at intervals. Specifically in this embodiment, the net distance between adjacent main energy storage tanks is 100 mm. It can be understood that in other embodiments, the net distance between adjacent main energy storage tanks can also be 50 mm, 80 mm, 100 mm, 150 mm or 200 mm, and of course, it can also be other distances between 50-200 mm.

[0029] Prestressed anchor cables 31 are arranged between three adjacent main energy storage tanks along the central axis of the main energy storage tank, and the two ends of each prestressed anchor cable are fixed on two opposite outer walls. Specifically in this embodiment, the prestressed anchor cable 31 adopts a steel strand anchor cable. It can be understood that in another embodiment, the prestressed anchor cable 31 can also adopt a carbon fiber anchor cable, and of course other high-strength prestressed anchor cables can also be used. In order to facilitate the application of prestress, a sheath tube is provided on the prestressed anchor cable, and the two ends of the sheath pass through two opposite outer walls respectively. After the prestress is applied, cement slurry is injected into the sheath tube.

[0030] In this embodiment, in order to make full use of the inner cavity of the shell, an auxiliary energy storage tank 212 is arranged in the gap area formed between the outermost main energy storage tank 211 and the outer wall. The outer diameter of the auxiliary energy storage tank is smaller than the outer diameter of the main energy storage tank. In this embodiment, along the radial direction of the main energy storage tank, two auxiliary energy storage tanks 212 are arranged on the inner sides of two opposite outer walls, two of which are located in the two gap areas formed by the first and third main energy storage tanks from bottom to top and the outer wall, and the other two auxiliary energy storage tanks are located in the two gap areas formed by the third and fifth main energy storage tanks from bottom to top and the outer wall. One end of the main energy storage tank and the auxiliary energy storage tank is connected to an inlet and outlet pipe 42, which is connected to the main air pipe 41. Of course, according to different requirements, in another embodiment, the auxiliary energy storage tank can be eliminated and only the main energy storage tank is retained.

[0031] In this embodiment, the outer diameter of the main energy storage tank is 1000 mm, and the outer diameter of the auxiliary energy storage tank is 450 mm. It can be understood that in other embodiments, the outer diameter of the main energy storage tank can also be 500 mm, 800 mm, 1200 mm or 1500 mm. Of course, it can also be other data between 500 - 1200 mm. The outer diameter of the auxiliary energy storage tank is designed according to the size of the empty space area.

[0032] To minimize the construction cost while ensuring safe production, in this embodiment, along the radial direction of the main energy storage tank, the inner cavity of the outer shell is divided into three sequentially nested tank areas from the inside out. In Figure 3 this, the adjacent two tank areas are separated by dotted lines. For ease of description, the three tank areas are sequentially named the first tank area, the second tank area, and the third tank area from the inside out. The main energy storage tanks in the first tank area are represented by the letter G, with a total of 5 main energy storage tanks. The main energy storage tanks in the second tank area are represented by the letter F, with a total of 14 main energy storage tanks. The main energy storage tanks in the third tank area are represented by the letter S, with a total of 24 main energy storage tanks. The 4 auxiliary energy storage tanks are all located in the third tank area. Among them, the wall thickness of the main energy storage tanks in the third tank area is 20 mm, the wall thickness of the main energy storage tanks in the second tank area is 15 mm, and the wall thickness of the main energy storage tanks in the first tank area is 6 mm. That is, in the adjacent two tank areas, the wall thickness of the main energy storage tanks in the outer tank area is greater than that of the main energy storage tanks in the inner tank area. The wall thickness of the heads of each main energy storage tank is the same as that of the tank body wall.

[0033] Since in this embodiment, along the radial direction, there is only one layer of main energy storage tanks in each tank area, and the wall thickness of the main energy storage tanks in each tank area is the same. It can be understood that when there are multiple layers of main energy storage tanks in a certain tank area, the wall thickness of the main energy storage tanks on the outside can also be greater than that of the main energy storage tanks on the inside to further reduce the construction cost of the main energy storage tanks, thereby reducing the construction cost of the entire device. Of course, according to different needs, the same wall thickness can also be used for all the main energy storage tanks.

[0034] To improve the strength of the outer shell, in this embodiment, six restraint ribs 15 are provided on the outer shell. The six restraint ribs are arranged at intervals along the central axis direction of the main energy storage tank. Each restraint rib extends upward from the bottom plate along one outer wall until the top plate, and then extends downward from the top plate along the other outer wall to the bottom plate and surrounds a circle. Each restraint rib is located in a vertical plane perpendicular to the central axis of the main energy storage tank, and the steel mesh within the same restraint rib remains continuous.

[0035] Please also refer to Figure 5 , the outer shell in this embodiment is completely underground and is a fully underground structure, making the top plate lower than the ground. To ensure the stability of the outer shell, piles 14 are sunk on the lower side of the bottom plate. It can be understood that in other embodiments, the outer shell can also adopt a semi - underground structure as shown in Figure 6 orFigure 7 To simplify the drawings, Figure 5 , Figure 6 and Figure 7 In the drawings, reference numeral 100 indicates the ground.

[0036] The construction method of the above-mentioned tube bundle gas storage device is described below. The construction method includes the following steps:

[0037] (1) Sinking piles 14 at set positions, then excavating foundation pits, and constructing the bottom plate 11 and the surrounding wall 12 of the shell 10; the piles in this embodiment are specifically PHC pipe piles, and of course in other embodiments, other prefabricated piles or cast-in-place piles such as bored piles can also be used.

[0038] (2) Arrange the main energy storage tanks and anchor cables; when arranging the main energy storage tanks and anchor cables, they are arranged in layers from bottom to top. For the convenience of description, the five layers of main energy storage tanks are respectively called the first layer main energy storage tank, the second layer main energy storage tank, the third layer main energy storage tank, the fourth layer main energy storage tank and the fifth layer main energy storage tank from bottom to top. The specific steps are as follows:

[0039] (2.1) Arrange the first layer of main energy storage tanks, then place triangular pads 35 on the upper sides of two adjacent main energy storage tanks in the first layer, and preset anchor holes 36 for anchor cables to pass through in the center of the triangular pads, and then lay the first layer of anchor cables; a sheath tube is sleeved on the anchor bolt, and the two ends of the sheath tube are respectively passed through an outer wall.

[0040] (2.2) Lay the second layer of main energy storage tanks so that the second layer of main energy storage tanks are supported on the first layer of main energy storage tanks through triangular pads.

[0041] (2.3) Arrange the remaining main energy storage tanks according to the method of arrangement (2.2). When arranging the main energy storage tanks, also arrange the corresponding auxiliary energy storage tanks.

[0042] (3) Pour high-strength and high-toughness concrete. After the exterior wall and the high-strength and high-toughness concrete have reached the design strength, the anchor cables are tensioned in layers to generate prestress to form prestressed anchor cables. The prestressed anchor cables are then locked on the exterior wall through anchors. After the prestressed anchor cables are locked, cement slurry is injected into the sheath pipe to bond the sheath pipe and the prestressed anchor cables together. The sheath pipe can be made of steel pipe or hard plastic pipe.

[0043] (4) Construction of the top plate of the shell.

[0044] Each restraining rib is constructed synchronously with the construction sequence of the bottom plate, exterior wall and top plate, and the steel mesh within the same restraining rib remains continuous.

Claims

1. A tube bundle gas storage device with a honeycomb structure, characterized in that: The invention comprises a shell of a steel-concrete structure, in which a plurality of main energy storage tanks are arranged, wherein the central axes of the main energy storage tanks are parallel to each other and extend in the horizontal direction, and the adjacent main energy storage tanks are arranged in an equilateral triangle, and high-strength and high-toughness concrete is poured between the adjacent main energy storage tanks, and the outer wall of each main energy storage tank is wrapped with high-strength and high-toughness concrete; along the central axis direction of the main energy storage tank, a prestressed anchor cable is arranged between three adjacent main energy storage tanks, and the two ends of the prestressed anchor cable are respectively fixed to the opposite outer walls of the shell; each main energy storage tank is cylindrical and has the same outer diameter, and the outer diameter of the main energy storage tank is 500-1500mm.

2. The tube bundle gas storage device according to claim 1, characterized in that: The plurality of main energy storage tanks are arranged into a plurality of layers along the vertical direction.

3. The tube bundle gas storage device according to claim 1, characterized in that: Adjacent main energy storage tanks are arranged at intervals, and the net distance between adjacent main energy storage tanks is 50-200mm.

4. The tube bundle gas storage device according to claim 1, characterized in that: An auxiliary energy storage tank is arranged in a gap area formed between the outermost main energy storage tank and the outer wall of the shell, and the outer diameter of the auxiliary energy storage tank is smaller than the outer diameter of the main energy storage tank.

5. The tube bundle gas storage device according to claim 1, characterized in that: Along the radial direction of the main energy storage tank, the inner cavity of the shell is divided from inside to outside into at least two tank areas which are arranged in sequence. In two adjacent tank areas, the wall thickness of the main energy storage tank located in the outer tank area is greater than the wall thickness of the main energy storage tank located in the inner tank area.

6. The tube bundle gas storage device according to claim 5, characterized in that: In the same tank area, along the radial direction of the main energy storage tank, of two adjacent main energy storage tanks, the wall thickness of the main energy storage tank located on the outside is greater than the wall thickness of the main energy storage tank located on the inside.

7. The tube bundle gas storage device according to claim 1, characterized in that: The outer shell is provided with binding ribs, which extend around the outer shell along a vertical plane, and the vertical plane is perpendicular to the central axis of the main energy storage tank.

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