CN218894746U - Gravity compressed air energy storage system gas storage - Google Patents

Abstract

The application provides a gravity compressed air energy storage system gas storage, the gas storage that encloses presents narrow lower wide on the whole, when pressure-bearing cylinder down moves to the wall of bottom time sealing membrane hugs closely the gas storage shaft, its sealing membrane stress condition is the same with the vertical gas storage shaft of same width in the prior art about the sealing membrane stress condition does not change, but when pressure-bearing cylinder moves to the upper portion, sealing membrane motion hugs closely the wall of permanent straight section for this embodiment provides sufficient sealing membrane maintenance space on the basis that reduces the clearance between shaft inner wall and the pressure-bearing cylinder and then reduces sealing membrane atress, and does not have local stress concentration point, the effectual structure that improves the gas storage chamber in the traditional gravity compressed air energy storage system.

Description

A gravity compressed air energy storage system gas storage

technical field

The present application relates to the technical field of energy storage, and in particular to a gas storage of a gravity compressed air energy storage system.

Background technique

The compressed air energy storage system stores excess electrical energy through compressed air, and releases high-pressure air through the expander to generate power when needed. During energy storage, the compressed air energy storage system consumes electric energy to compress the air and store it in the air storage chamber; during energy release, the high-pressure air is released from the air storage chamber, enters the combustion chamber, and is heated by fuel combustion to drive power generation. It does not use fuel combustion for heating, but recovers the heat of compression for heating air. The compressed air energy storage system can build a large power station of more than 100MW, second only to the pumped storage power station, and has the advantages of long energy storage period, small unit energy storage investment, long life and high efficiency.

In this process, the high-pressure gas is input into the gas storage, and through the sealing film, the gravity block above the sealing film is raised to have gravitational potential energy. During this process, the sealing film is subjected to a huge pulling force, and the sealing film material requires special preparation costs. Expensive needs to protect the sealing membrane as much as possible. In the prior art, the upper and lower sides of the shaft are equal in width and the gap between them and the gravity block is constant. The sealing film, the space below the sealing film and the gravity block enclose the gas storage, and the sealing film is respectively anchored to the shaft and the gravity block. On the briquetting block, in order to reduce the force of the sealing film, the gap between the inner wall of the shaft and the gravity briquetting block can be reduced, but there will be no sufficient space for repairing the sealing film. The local concentrated stress at the side of the expanded excavation is also not conducive to the maintenance of the sealing membrane.

Utility model content

This application aims to solve one of the technical problems in the related art at least to a certain extent.

Therefore, the purpose of this application is to propose a gravity compressed air energy storage system gas storage, and the enclosed gas storage is narrow at the top and wide at the bottom. When the pressure-bearing cylinder runs downward to the bottom, the sealing film Close to the wall of the gas storage shaft, the stress of the sealing film is the same as the stress of the sealing film in the vertical gas storage shaft with the same width in the prior art. However, when the pressure-bearing cylinder runs to the upper part, the sealing film moves Close to the wall of the constant straight section, this embodiment reduces the gap between the inner wall of the shaft and the pressure-bearing cylinder, thereby reducing the stress on the sealing membrane, provides sufficient maintenance space for the sealing membrane, and has no local stress concentration points , effectively improving the structure of the traditional gravity compressed air energy storage chamber.

In order to achieve the above purpose, the application proposes a gravity compressed air energy storage system gas storage, including:

A gas storage shaft, a pressure-bearing cylinder is movably inserted into the gas storage shaft, and there is a gap between the gas storage shaft and the pressure-bearing cylinder; the gas storage shaft includes constant straight sections connected sequentially from top to bottom , side expansion section and wide straight section, the outer walls of the three are on the same horizontal plane;

A sealing film, the sealing film is arranged in the gap; the sealing film is in sealing connection with the outer wall of the pressure-bearing cylinder and the inner wall of the bottom of the constant straight section, so that the sealing film, the storage tank The gas shaft is located between the space below the sealing membrane and the pressure cylinder to form a gas storage.

In some embodiments, the pressure-bearing cylinder is filled with gravity briquettes.

In some embodiments, the cross-sectional areas of the constant straight sections in the vertical direction are all the same, and the inner diameter thereof is larger than the outer diameter of the pressure-bearing cylinder.

In some embodiments, the cross-sectional area of the side expansion section in the vertical direction decreases successively from top to bottom, and the cross-sectional area of the upper end thereof is the same as that of the constant straight section.

In some embodiments, the cross-sectional area of the wide straight section in the vertical direction is the same as that of the bottom end of the side expansion section.

In some embodiments, an inspection door is also included; wherein the inspection door is arranged at the bottom of the gas storage shaft for inspection of the sealing membrane.

In some embodiments, a guide device is also included, which is arranged on the peripheral side of the pressure-bearing cylinder between the constant straight section and the pressure-bearing cylinder.

In some embodiments, the guide device includes guide grooves and rollers; wherein a plurality of guide grooves are respectively arranged on the inner wall of the constant straight section; the rollers cooperate with the guide grooves and The groove bottoms of the guide grooves are connected so that the rollers move up and down along the groove bottoms of the guide grooves when the pressure bearing cylinder moves up and down.

In some embodiments, the inner wall of the gas storage shaft is provided with a steel lining.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic structural diagram of a gas storage proposed by an embodiment of the present application;

In the figure, 1. Gas storage shaft; 2. Pressure cylinder; 3. Inspection door; 4. Sealing film; 5. Gas storage; 6. Constant straight section; 7. Side expansion section; 8. Wide straight section.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, are only for explaining the present application, and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

Referring to Fig. 1, it is a gas storage of a gravity compressed air energy storage system proposed by an embodiment of the present application, including a gas storage shaft 1 and a sealing film 4; wherein a pressure-bearing cylinder 2 is movably inserted in the gas storage shaft 1, and the gas storage There is a gap between the shaft 1 and the pressure-bearing cylinder 2; the gas storage shaft 1 includes a constant straight section 6, a side expansion section 7 and a wide straight section 8 connected in sequence from top to bottom, and the outer walls of the three are on the same horizontal plane; The sealing film 4 is arranged in the gap; the sealing film 4 is sealed and connected with the outer wall of the pressure-bearing cylinder 2 and the inner wall of the bottom of the constant straight section 6, so that the sealing film 4 and the gas storage shaft 1 are located in the space below the sealing film 4 and the bearing A gas storage 5 is enclosed between the pressure cylinders 2 .

Specifically, the gas storage shaft 1 is dug downward in the soil layer. The upper part of the gas storage shaft 1 is open, and the upper end of the gas storage shaft 1 is movably inserted with a pressure cylinder 2 and the outer wall of the pressure cylinder 2 is connected to the gas storage shaft 1. There is a gap between the inner walls of the inner wall, and the sealing film 4 is arranged in the gap, and the sealing film 4 is sealed and connected with the outer wall of the pressure cylinder 2 and the inner wall of the gas storage shaft 1, so that the sealing film 4 and the gas storage shaft 1 are located in the sealing The space below the membrane 4 and the pressure-bearing cylinder 2 enclose a gas storage 5 . In this embodiment, the gas storage shaft 1 is sequentially connected with the constant straight section 6, the side expansion section 7 and the wide straight section 8 from top to bottom, wherein the bottom of the constant straight section 6 is connected to the top of the side expansion section 7, and the side expansion section The bottom of the section 7 is connected to the top of the wide and straight section 8, and the bottom of the wide and straight section 8 is the bottom of the gas storage shaft 1, and the three are connected to each other.

In some embodiments, the cross-sectional area of the constant straight section 6 in the vertical direction is the same, and its inner diameter is larger than the outer diameter of the pressure-bearing cylinder 2; the cross-sectional area of the side expansion section 7 in the vertical direction is from top to Decreases down successively, and the cross-sectional area of its upper end is identical with the cross-sectional area of constant straight section 6;

Specifically, as shown in Figure 1, the constant straight section 6 and the wide straight section 8 are both structural sections with the same cross-sectional area in the vertical direction, and the side expansion section 7 is connected between the two to be wide at the top and narrow at the bottom, corresponding to The gas storage chamber enclosed in this embodiment is a structure with a narrow top and a wide bottom. When the pressure-bearing cylinder 2 runs downward to the bottom, the sealing film 4 is close to the wall of the gas storage shaft 1. The stress of the sealing film 4 is the same as In the prior art, the stress of the sealing film 4 in the vertical gas storage shaft 1 with the same width up and down is the same and does not change, but when the pressure-bearing cylinder 2 moves to the upper part, the sealing film 4 moves close to the wall of the constant straight section 6, so that In this embodiment, on the basis of reducing the gap between the inner wall of the shaft and the pressure cylinder 2 and thereby reducing the stress on the sealing film 4, it provides sufficient maintenance space for the sealing film 4, and there is no local stress concentration point, which effectively improves the traditional Gravity compressed air energy storage chamber structure.

In this embodiment, during the energy storage process of the gravity compressed air energy storage system, the electric energy drives the air compressor unit to work, and the air compressor unit feeds compressed air into the gas storage 5, and the pressure of the compressed air pushes the pressure-bearing cylinder 2 and the pressure-bearing cylinder The gravity briquette above 2 moves upward; during the energy release process of the gravity compressed air energy storage system, the compressed air in the gas storage 5 is passed into the air expansion unit, which drives the air expansion unit to work to realize power generation.

In some embodiments, the gas storage 5 further includes an inspection door 3 ; wherein the inspection door 3 is a sealed inspection door 3 arranged at the bottom of the gas storage shaft 1 for inspection of the sealing membrane 4 .

In some embodiments, the gas storage 5 further includes a guiding device, which is arranged on the peripheral side of the pressure-bearing cylinder 2 and located between the constant straight section 6 and the pressure-bearing cylinder 2 .

Specifically, the guiding device includes guide grooves and rollers; wherein a plurality of guide grooves are arranged on the inner wall of the constant straight section 6; When the roller moves up and down along the groove bottom of the guide groove. Exemplarily, a plurality of specific guide grooves are provided, and the plurality of guide grooves are distributed on the side of the pressure-bearing cylinder 2, and the guide grooves are arranged on the inner wall of the constant straight section 6; and a plurality of rollers are arranged, and the plurality of rollers are respectively installed on the On the peripheral side of the gravity component, the rollers are connected with the groove bottom of the guide groove, so that the rollers move up and down along the groove bottom of the guide groove when the gravity component moves up and down.

It can be understood that when the pressure cylinder 2 moves up and down during the energy storage process, multiple guide grooves can be provided on the inner wall circumference of the constant straight section 6 of the gas storage shaft 1, for example, four guide grooves can be provided, and four guide grooves can be provided. It can be arranged on the inner wall of the constant straight section 6 at equal angles. Since the rollers on the pressure-bearing cylinder 2 are installed on the upper side of the pressure-bearing cylinder 2 through the rotating shaft, the rollers can rotate on the pressure-bearing cylinder 2. When the rollers and the guide groove When the groove bottoms are connected, not only the position can be limited by the guide groove, but the guide groove cooperates with the roller to constrain the movement direction of the pressure bearing cylinder 2, and at the same time, the pressure bearing cylinder 2 moves vertically upward or downward along the direction of the guide groove at a certain speed , Regularly add lubricants, such as butter, graphite, to the position where the guide groove contacts the rollers, so as to reduce friction and improve the conversion rate of gravitational potential energy.

In some embodiments, the inner wall of the gas storage shaft 1 is provided with a steel lining.

Specifically, a steel lining is provided on the inner wall of the gas storage shaft 1, and the sealing film 4 is connected to the inner wall of the steel lining. The sealing performance of the connection with the sealing film 4 can be improved by providing the steel lining.

In some embodiments, the pressure-bearing cylinder 2 is filled with gravity briquettes.

It can be understood that the pressure-bearing cylinder 2 can be a cylindrical structure surrounded by steel plates, and its interior is a hollow structure, which reduces the weight and facilitates hoisting. In addition, filling the pressure-bearing cylinder 2 with gravity briquettes can increase the gravity of energy storage .

It should be noted that in the description of the present application, terms such as "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the present application includes additional implementations in which functions may be performed out of the order shown or discussed, including in substantially simultaneous fashion or in reverse order depending on the functions involved, which shall It should be understood by those skilled in the art to which the embodiments of the present application belong.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (9)

1. A gravity compressed air energy storage system gas storage, characterized in that it comprises: A gas storage shaft, a pressure-bearing cylinder is movably inserted into the gas storage shaft, and there is a gap between the gas storage shaft and the pressure-bearing cylinder; the gas storage shaft includes constant straight sections connected sequentially from top to bottom , side expansion section and wide straight section, the outer walls of the three are on the same horizontal plane; A sealing film, the sealing film is arranged in the gap; the sealing film is in sealing connection with the outer wall of the pressure-bearing cylinder and the inner wall of the bottom of the constant straight section, so that the sealing film, the storage tank The gas shaft is located between the space below the sealing membrane and the pressure cylinder to form a gas storage. 2 . The gas storage of a gravity compressed air energy storage system according to claim 1 , wherein the pressure-bearing cylinder is filled with gravity briquettes. 3 . 3. A gravity compressed air energy storage system gas storage according to claim 1, characterized in that the cross-sectional areas of the constant straight sections in the vertical direction are all the same, and their inner diameters are larger than the pressure-bearing The outer diameter of the barrel. 4. A gravity compressed air energy storage system gas storage according to claim 3, characterized in that the cross-sectional area of the side expansion section in the vertical direction decreases successively from top to bottom, and the upper end The cross-sectional area is the same as that of the constant straight section. 5. A gravity compressed air energy storage system gas storage according to claim 4, characterized in that the cross-sectional area of the wide straight section in the vertical direction is the same and is the same as that of the bottom end of the side expansion section. The cross-sectional area is the same. 6. A gravity compressed air energy storage system gas storage according to any one of claims 1-5, further comprising an inspection door; wherein the inspection door is arranged at the bottom of the gas storage shaft for The sealing membrane is overhauled. 7. The gas storage of a gravity compressed air energy storage system according to claim 6, further comprising a guiding device, which is arranged on the peripheral side of the pressure-bearing cylinder and is located between the constant straight section and the between pressure cylinders. 8. A gravity compressed air energy storage system gas storage according to claim 7, characterized in that, the guide device includes guide grooves and rollers; wherein a plurality of guide grooves are arranged on the constant straight The inner wall of the section; the roller is matched with the guide groove and connected with the groove bottom of the guide groove, so that when the pressure bearing cylinder moves up and down, the roller moves up and down along the groove bottom of the guide groove. 9. A gravity compressed air energy storage system gas storage according to claim 7, characterized in that, the inner wall of the gas storage shaft is provided with a steel lining.

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