Vertical honeycomb structure gas storage

Abstract

The utility model provides a vertical honeycomb structure gas storage which comprises a shell, the shell is cylindrical and extends in the vertical direction, a plurality of main energy storage tanks are installed in the shell, all the main energy storage tanks are cylindrical and are the same in outer diameter, and the central axes of all the main energy storage tanks are parallel to one another and extend in the vertical direction; the adjacent main energy storage tanks are arranged in a regular triangle shape at intervals, high-strength and high-toughness concrete is poured in the shell, and the main energy storage tanks and the shell form a whole through the high-strength and high-toughness concrete. A first pre-stressed anchor cable is arranged among the three adjacent main energy storage tanks in the vertical direction, and the two ends of the first pre-stressed anchor cable are fixed to the top plate and the bottom plate of the shell respectively. The top of each main energy storage tank is provided with a branch air pipe. The device is of an integral structure and has high self-stability, high-strength and high-toughness concrete is used for providing additional guarantee for the main energy storage tank, and therefore the wall thickness of the main energy storage tank can be reduced, and the construction cost of the device is reduced.

Description

Technical Field

[0001] The invention relates to a vertical honeycomb structure gas storage. Background Art

[0002] Compressed air energy storage is a storage method that uses electricity to compress air during the low load period of the power grid, and seals the air at high pressure in salt caverns, artificial chambers, and ground high-pressure gas tanks. During the peak load period of the power grid, the compressed air is released to drive the steam turbine to generate electricity. This technology helps to balance the load fluctuations of the power system and improve energy utilization efficiency.

[0003] Compressed air energy storage power stations generally include four systems: air compression system, heat storage system, gas storage system and expansion power generation system. Among them, the gas storage system is the main component of the compressed air energy storage power station. It is not only the determining factor of the construction cost and site selection of the power station, but also the technical key to its operating energy efficiency and safety. Due to the inherent limitations of its site selection and the influence of the alternating stress generated during filling and discharging on the salt cavern wall, the long-term stability of salt cavern gas storage still needs to be further verified. Artificial gas storage chambers have the advantages of flexible site selection, higher pressure upper limit, larger fluctuation range, higher system conversion efficiency, and easy maintenance, but the burial depth is often deep and the cost is high. The ground high-pressure storage tank uses a metal pressure vessel or other material gas storage warehouse as a gas storage device, and is composed of multiple groups of high-pressure storage tanks in parallel to form a gas storage system. Due to the high safety requirements of the high-pressure storage pipe, the cost is high. Due to the constraints of the above reasons, the further development of compressed air energy storage technology is limited. Therefore, how to reduce the construction cost of compressed air energy storage power stations is still a key issue in compressed air energy storage technology. Summary of the invention

[0004] In order to solve the problem of high construction cost of compressed air energy storage facilities, the present application proposes a vertical honeycomb structure gas storage reservoir, which includes an outer shell, which is cylindrical and extends in the vertical direction. A number of main energy storage tanks are installed in the outer shell, each of which is cylindrical and has the same outer diameter. The central axes of the main energy storage tanks are parallel to each other and extend in the vertical direction. Adjacent main energy storage tanks are arranged in an equilateral triangle and are set at intervals. High-strength and high-toughness concrete is poured in the outer shell, and the high-strength and high-toughness concrete forms the main energy storage tanks and the outer shell into a whole; along the vertical direction, a first prestressed anchor cable is arranged between three adjacent main energy storage tanks, and the two ends of the first prestressed anchor cable are respectively fixed to the top plate and the bottom plate of the outer shell; a bronchus is installed on the top of each main energy storage tank.

[0005] The vertical honeycomb structure gas storage adopts the following steps during construction:

[0006] (1) constructing the bottom plate and outer wall of the shell, and fixing the lower end of the first anchor cable carrying the first anchor cable sleeve at the set position of the bottom plate;

[0007] (2) Arrangement of main energy storage tanks;

[0008] (3) pouring high-strength and high-toughness concrete, and making the upper ends of the first anchor cable and the first anchor cable sleeve extend upward from the upper surface of the high-strength and high-toughness concrete;

[0009] (4) Construct the top plate of the outer shell, and make the upper ends of the first anchor cable and the first anchor cable sleeve extend upward from the upper surface of the top plate. After the outer wall, the bottom plate, the top plate and the high-strength and high-toughness concrete have reached the designed strength, tension the first anchor cables step by step to generate prestress to form the first prestressed anchor cables, and then lock the upper ends of the first prestressed anchor cables on the top plate.

[0010] This application uses high-strength and high-toughness concrete to form each main energy storage tank arranged in a honeycomb shape into a whole, which has high self-stability and has the following advantages:

[0011] High material utility: Since the main energy storage tanks are arranged at intervals, the high-strength and high-toughness concrete can wrap each main energy storage tank separately, so that the high-strength and high-toughness concrete in the outer shell forms a honeycomb-shaped concrete frame with high strength and high toughness, which can provide additional guarantees for the main energy storage tanks, thereby reducing the wall thickness of the main energy storage tanks. And in the axial direction, the friction between the main energy storage tank and the high-strength and high-toughness concrete is utilized, and the high-strength and high-toughness concrete can constrain the main energy storage tank. The first prestressed anchor cable and the high-strength and high-toughness concrete together form a prestressed concrete structure, which can share the axial force of the main energy storage tank, and can further reduce the overall wall thickness of the main energy storage tank, thereby reducing the construction cost of the device. After the prestressed concrete structure is formed, the device as a whole forms a self-stabilizing structure.

[0012] Good thermal insulation performance: The low thermal conductivity of high-strength and high-toughness concrete is used to improve the thermal insulation performance of the gas storage facility to prevent the heat in the stored air from being transferred outward and improve the energy storage efficiency.

[0013] Good corrosion resistance and durability: The wrapping effect of high-strength and high-toughness concrete can provide anti-corrosion protection for the main energy storage tank, improve the corrosion resistance of the main energy storage tank, and extend the service life of the main energy storage tank.

[0014] Strong customizability: modular design can be carried out according to project conditions to develop 10-20MPa, 0.5-150,000m 3 Large-scale high-pressure gas storage system.

[0015] Specifically, in order to facilitate the pouring of high-strength and high-toughness concrete, the net distance between adjacent main energy storage tanks is 50-200mm. 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 the main energy storage tanks, and the high-strength and high-toughness concrete in each area cannot be connected to each other, so that the high-strength and high-toughness concrete only has a bonding effect on the main energy storage tank, but no wrapping effect, so that each main energy storage tank can only rely on its own strength and cannot reduce the wall thickness of each 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 excessively thick high-strength and high-toughness concrete exceeds the required strength, and it will also reduce the gas storage space per unit space.

[0016] Furthermore, in order to make full use of the space in the shell, an auxiliary energy storage tank is arranged in the 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.

[0017] In order to further reduce the construction cost, the inner cavity of the shell is divided into at least two sequentially arranged tank areas from the inside to the outside along the radial direction of the shell. In the 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. Under the wrapping effect of the high-strength and high-toughness concrete, the overall thickness of the high-strength and high-toughness concrete becomes thicker and thicker from the center of the shell to the outside, which can provide greater strength protection for the internal main energy storage tank, thereby reducing the wall thickness of the inner main energy storage tank and thereby reducing the construction cost of the entire device.

[0018] For the same reason, in order to further reduce the construction cost of the device, in the same tank area, along the radial direction of the outer shell, of the two adjacent main energy storage tanks, the wall thickness of the main energy storage tank located on the outer side is greater than the wall thickness of the main energy storage tank located on the inner side.

[0019] Furthermore, in order to improve the radial stability of the shell, a concrete beam is arranged on the outer side of the outer wall of the shell, and a second prestressed anchor cable is installed in the concrete beam, and the second prestressed anchor cable surrounds the shell.

[0020] Furthermore, to facilitate tensioning of corresponding anchor cables, the second prestressed anchor cables in at least one concrete beam include N third prestressed anchor cables arranged in sequence, and N anchor platforms are provided on the concrete beam. Both ends of each third prestressed anchor cable are respectively fixed on two adjacent anchor platforms on the same concrete beam, N ≥ 2 and is an integer, and adjacent ends of adjacent third prestressed anchor cables in the same concrete beam are cross-arranged.

[0021] After the second prestressed anchor cable is arranged as a plurality of third prestressed anchor cables, the length of a single third prestressed anchor cable can be reduced, thereby reducing the curvature of the third prestressed anchor cable, so that when the corresponding anchor cable is tensioned, the friction between the anchor cable and the corresponding anchor cable casing can be reduced, so that the anchor cable can be tensioned more evenly; and by utilizing the cross arrangement of the third prestressed anchor cables, the second prestressed anchor cable can surround the outer shell for a week, thereby forming a restraining effect on the outer shell.

[0022] To facilitate construction and ensure that the first prestressed anchor cable is stably connected to the base plate, the lower end of the first prestressed anchor cable is fixed to the steel mesh of the base plate via an anchor plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 AA top view.

[0025] Figure 3 yes Figure 2 Magnified view of part B.

[0026] Figure 4 This is a structural diagram of the connection between the first anchor cable and the base plate.

[0027] Figure 5 This is a schematic diagram of the main energy storage tank being isolated using pads during installation.

[0028] Figure 6 This is a structural diagram when the present application adopts a fully underground structure for installation.

[0029] Figure 7 This is a structural diagram when the application adopts a semi-underground structure installation.

[0030] Figure 8 This is a structural diagram when the present application adopts a fully above-ground structural installation. DETAILED DESCRIPTION

[0031] The structure of the vertical honeycomb structure gas storage in this application is described below. Figure 1-Figure 3 The vertical honeycomb structure gas storage includes a steel-concrete shell 10, which is in the shape of a cylinder extending in the vertical direction. The shell specifically includes a bottom plate 11, a circular outer wall 12 cast on the bottom plate 11, and a top plate 13 cast on the top of the outer wall.

[0032] Several main energy storage tanks 211 are installed in 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 are parallel to each other and extend in the vertical direction. Adjacent main energy storage tanks 211 are arranged in an equilateral triangle and are spaced apart. High-strength and high-toughness concrete is poured in the shell. The high-strength and high-toughness concrete penetrates between adjacent main energy storage tanks, so that the outer wall of each main energy storage tank is wrapped with high-strength and high-toughness concrete. The high-strength and high-toughness concrete forms the main energy storage tank and the shell into a whole. For clarity, the high-strength and high-toughness concrete is not shown in the attached drawings.

[0033] Specifically in the present 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 can also be other distances between 50-200 mm.

[0034] In the vertical direction, a first prestressed anchor cable 17 is arranged between three adjacent main energy storage tanks, and the two ends of the first prestressed anchor cable are respectively fixed on the top plate and the bottom plate. In order to facilitate the stretching of the first prestressed anchor cable, a first anchor cable sleeve 18 is arranged on the outer shell of the first prestressed anchor cable. Specifically in this embodiment, the first prestressed anchor cable 17 adopts a steel strand anchor cable. It can be understood that in another embodiment, the first prestressed anchor cable 17 can also adopt a carbon fiber anchor cable, and of course other high-strength prestressed anchor cables can also be adopted.

[0035] In order to make full use of the space in 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, and the outer diameter of the auxiliary energy storage tank is smaller than the outer diameter of the main energy storage tank. A bronchial pipe 42 is installed on the top of the main energy storage tank and the auxiliary energy storage tank, and the inlet bronchial pipe 42 is connected to the main air pipe 41. In this embodiment, the outer diameter of the main energy storage tank is 1000mm, and the outer diameter of the auxiliary energy storage tank is 500mm. It can be understood that in other embodiments, the outer diameter of the main energy storage tank can also be 500mm, 800mm, 1200mm or 1500mm, and of course it can also be other data between 500-1200mm. The outer diameter of the auxiliary energy storage tank is designed according to the size of the gap area. The auxiliary energy storage tank is not a necessary technical feature. It can be understood that in another embodiment, the auxiliary energy storage tank can be cancelled and only the main energy storage tank is retained.

[0036] In order to minimize the construction cost while ensuring safe production, in this embodiment, the inner cavity of the shell is divided into three tank areas which are arranged in sequence from the inside to the outside along the radial direction of the shell. Figure 3In the figure, two adjacent tank areas are separated by a regular hexagonal wireframe. For ease of description, the three tank areas are sequentially named the first tank area 31, the second tank area 32 and the third tank area 33 from the inside to the outside, and all auxiliary energy storage tanks are located in the third tank area. The wall thickness of the main energy storage tank in the third tank area is 20mm, the wall thickness of the main energy storage tank in the second tank area is 15mm, and the wall thickness of the main energy storage tank in the first tank area is 6mm, that is, in the two adjacent tank areas, the wall thickness of the main energy storage tank in the outer tank area is greater than the wall thickness of the main energy storage tank in the inner tank area. The wall thickness of the head of each main energy storage tank is the same as the wall thickness of the tank body.

[0037] Since in this embodiment, the main energy storage tanks of each tank area have multiple layers along the radial direction, in another embodiment, the wall thickness of the main energy storage tanks in the same tank area can also be thickened from the inside to the outside. The following is only an example of the main energy storage tanks in the second tank area. In the second tank area, along the radial direction of the shell, there are five layers of main energy storage tanks, and each layer of main energy storage tanks is arranged according to a regular hexagon. The wall thickness of each layer of main energy storage tanks can be set to 8mm, 9mm, 11mm, 13mm, and 15mm from the inside to the outside. Of course, the second tank area can also be divided into two or three sub-tank areas from the inside to the outside, and the wall thickness of the main energy storage tanks in different sub-tank areas can be set separately again 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, all main energy storage tanks can also have the same wall thickness.

[0038] Please also see Figure 2 and Figure 3 In order to improve the radial strength of the shell, in this embodiment, three concrete beams 14 are arranged on the outer side of the outer wall. The three concrete beams are cast on the outer side of the outer wall at intervals in the vertical direction. The three concrete beams are all steel concrete structures, and a second prestressed anchor cable is installed in each concrete beam. The second prestressed anchor cable surrounds the shell. In order to facilitate the application of prestress to the second prestressed anchor cable, in this embodiment, the second prestressed anchor cable in each concrete beam includes four third prestressed anchor cables 15, and four anchoring platforms 141 are arranged on the outer peripheral surface of each concrete beam. Each anchoring platform 141 is arranged along the outer peripheral surface of the concrete beam. It protrudes radially outward so that each anchoring platform has two locking side surfaces 142 opposite to each other in the circumferential direction, and a second anchor cable sleeve is pre-buried between two adjacent anchoring platforms of the same concrete beam, and the two ends of the same second anchor cable sleeve respectively pass through the opposite locking side surfaces of the two adjacent anchoring platforms, and a third prestressed anchor cable is passed through each second anchor cable sleeve, and the two ends of the third prestressed anchor cable are locked on a locking side surface through a second anchor 16, so that four third prestressed anchor cables are arranged sequentially in the same concrete beam, and the adjacent two ends of two adjacent third prestressed anchor cables can be cross-arranged through the anchoring platforms.

[0039] It can be understood that each second prestressed anchor cable can also include 2, 3, 5 or more third prestressed anchor cables. The third prestressed anchor cable is mainly provided to reduce the curvature of the second prestressed anchor cable, so as to reduce the friction between the third prestressed anchor cable and the second anchor cable casing when prestressing is applied. Therefore, there is no clear requirement for the number of third prestressed anchor cables included in the second prestressed anchor cable in each concrete beam. However, in general, it is not recommended to provide only 2 or 3 third prestressed anchor cables, which will cause greater friction between the anchor cable and the anchor cable casing, which is not conducive to applying prestress to the anchor cable.

[0040] Please also see Figure 6 The vertical honeycomb structure gas storage in this embodiment is a fully underground structure. To ensure the stability of the equipment, piles 19 are sunk under the bottom plate. At the same time, to reduce the excavation area during construction, a protective structure 51 is set around the foundation pit. It can be understood that in other embodiments, the shell can also be made of Figure 7 The semi-underground structure shown or Figure 8 The fully above-ground structure shown in the figure. According to different construction conditions and construction requirements, when a semi-underground structure is adopted, a retaining structure can also be set around the foundation pit. In the accompanying drawings, the mark 100 represents the ground.

[0041] See also Figure 4 In this embodiment, in order to facilitate the fixing of the first prestressed anchor cable, an anchor plate 171 is provided for each first prestressed anchor cable, and the anchor plate is welded to the lower side of the steel mesh 111 of the bottom plate, and the lower end of the first prestressed anchor cable is locked on the anchor plate through a clip-type anchor. A first anchor cable sleeve 18 is provided on each first prestressed anchor cable, and cement slurry is poured in the first anchor cable sleeve.

[0042] The construction method of the vertical honeycomb structure gas storage is described below. The construction method includes the following steps:

[0043] (1) Sink the pile 19 at the set position, then construct the enclosure structure 51 and excavate the foundation pit. The piles in this embodiment are specifically PHC pipe piles. Of course, in other embodiments, other prefabricated piles or cast-in-place piles such as cast-in-place piles can also be used. The enclosure structure adopts a steel sheet pile continuous wall.

[0044] After the excavation of the foundation pit is completed, the bottom plate 11 and the outer wall 12 of the outer shell 10 are constructed, and the lower end of the first anchor cable is fixed to the set position of the bottom plate. When constructing the outer wall, the concrete beam 14 and the anchor platform 141 are cast synchronously, and the second anchor cable sleeve is embedded in the concrete beam. A second anchor cable sleeve is embedded in correspondence with each third prestressed anchor cable. The two ends of the second anchor cable sleeve respectively penetrate the opposite anchoring sides of two adjacent anchor platforms, and the second anchor cable is pre-installed in the second anchor cable sleeve.

[0045] When installing the first anchor cable, first weld the anchor plate 171 to the lower side of the steel mesh 111 of the bottom plate, then use a clip-type anchor to fix the first anchor cable to the corresponding anchor plate, and sleeve the first anchor cable sleeve 18 on the first anchor cable. The first anchor cable sleeve is made of a steel pipe and is welded to the steel mesh 111 of the bottom plate.

[0046] (2) Arrange the main energy storage tanks: Arrange the main energy storage tanks and auxiliary energy storage tanks in the set positions in the shell in sequence. Figure 5 In order to prevent the main energy storage tanks and the auxiliary energy storage tanks from tipping over, a cushion block 35 may be installed between adjacent energy storage tanks including the main energy storage tanks and the auxiliary energy storage tanks, and an anchor cable hole 36 may be provided on the cushion block to facilitate the insertion of the first anchor cable and the corresponding first anchor cable sleeve. Of course, in other embodiments, other methods may be used to isolate and stabilize the energy storage tanks to prevent the energy storage tanks from tipping over, such as using steel bars or steel bars to form a grid net, so that the energy storage tanks are inserted into the mesh of the grid net.

[0047] (3) After the arrangement of the main energy storage tanks and the auxiliary energy storage tanks is completed, high-strength and high-toughness concrete is poured, and the upper ends of the first anchor cable and the first anchor cable casing are made to extend upward from the upper surface of the high-strength and high-toughness concrete.

[0048] (4) Construct the top plate of the outer shell, and make the upper ends of the first anchor cable and the first anchor cable sleeve exceed the upper surface of the top plate. After the outer wall, the bottom plate, the top plate and the high-strength and high-toughness concrete have reached the designed strength, tension the second anchor cable to make it a third prestressed anchor cable, and lock the two ends of the third prestressed anchor cable on the anchor platform through the second anchor 16, so that the adjacent third prestressed anchor cables are cross-arranged through the anchor platform.

[0049] Each first anchor cable is tensioned step by step to generate prestress to form a first prestressed anchor cable, and then the upper end of the first prestressed anchor cable is locked on the top plate with a lock.

[0050] Cement slurry is injected into the first anchor cable sleeve and the second anchor cable sleeve respectively, so that the first anchor cable sleeve is bonded to the first prestressed anchor cable, and the second anchor cable sleeve is bonded to the third prestressed anchor cable. The first anchor cable sleeve and the second anchor cable sleeve can be made of steel pipe or hard plastic pipe. Finally, medium-coarse sand 52 is filled in the gap between the outer wall and the enclosure structure.

Claims

1. A vertical honeycomb structure gas storage, characterized in that: The invention comprises an outer shell, which is cylindrical and extends in the vertical direction. A plurality of main energy storage tanks are installed in the outer shell. Each main energy storage tank is cylindrical and has the same outer diameter. The central axes of each main energy storage tank are parallel to each other and extend in the vertical direction. Adjacent main energy storage tanks are arranged in an equilateral triangle and are arranged at intervals. High-strength and high-toughness concrete is poured in the outer shell, and the high-strength and high-toughness concrete forms the main energy storage tank and the outer shell into a whole. In the vertical direction, a first prestressed anchor cable is arranged between three adjacent main energy storage tanks, and both ends of the first prestressed anchor cable are respectively fixed to the top plate and the bottom plate of the shell; a bronchial tube is installed on the top of each main energy storage tank.

2. The vertical honeycomb structure gas storage according to claim 1, characterized in that: The net distance between adjacent main energy storage tanks is 50-200mm.

3. The vertical honeycomb structure gas storage 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.

4. The vertical honeycomb structure gas storage according to claim 1, characterized in that: Along the radial direction of the shell, 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.

5. The vertical honeycomb structure gas storage according to claim 4, characterized in that: In the same tank area, along the radial direction of the shell, of the 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.

6. The vertical honeycomb structure gas storage according to claim 1, characterized in that: A concrete beam is arranged on the outer side of the outer wall of the shell, and a second prestressed anchor cable is installed in the concrete beam, and the second prestressed anchor cable surrounds the shell.

7. The vertical honeycomb structure gas storage according to claim 6, characterized in that: The second prestressed anchor cable in at least one concrete beam includes N third prestressed anchor cables arranged in sequence, and N anchor platforms are provided on the concrete beam. The two ends of each third prestressed anchor cable are respectively fixed on two adjacent anchor platforms on the same concrete beam, N ≥ 2 and is an integer, and the adjacent two ends of adjacent third prestressed anchor cables in the same concrete beam are cross-arranged.

8. The vertical honeycomb structure gas storage according to claim 1, characterized in that: The lower end of the first prestressed anchor cable is fixed to the steel mesh of the bottom plate through an anchor plate.

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