Compressed air energy storage chamber construction method

Abstract

The embodiment of the invention relates to a compressed air energy storage chamber construction method which comprises the steps that a basic chamber is obtained, an air cushion is placed at an inlet of the chamber, the air cushion is of a double-layer structure, an air injection space is formed between the inner layer and the outer layer of the air cushion, and an air storage space is formed in the inner layer of the air cushion; injecting air into the air injection space to enable the air cushion to reach a preset size; and concrete is injected into an annular space between the foundation chamber and the air cushion. Through the arrangement, the compressed air in the air storage space is subjected to heat insulation and heat preservation by the air in the air injection space, the influence of the temperature change of the compressed air on surrounding rock in the compression stage and the release stage of the compressed air is reduced, the damage to the surrounding rock is reduced, and the energy storage efficiency of the compressed air energy storage chamber is guaranteed. The concrete serves as a supporting structure of the compressed air energy storage chamber, stability is improved, steel linings do not need to be erected, the construction process is simple, construction efficiency is improved, manufacturing cost is low, and construction cost is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of underground energy storage, and in particular to a method for constructing a compressed air energy storage chamber. Background Art

[0002] During the operation of a compressed air energy storage system, the air temperature rises during the compression stage and drops sharply during the release stage. This periodic temperature fluctuation causes thermal expansion and contraction of the surrounding rock, which not only increases the risk of microcracks and damage in the surrounding rock, but also reduces the energy storage efficiency of the system. During the compression stage, the high temperature causes part of the energy to dissipate outward through the surrounding rock, resulting in a reduction in the efficiency of the compression process; while during the expansion stage, the low temperature causes the performance of the expander to decline, further affecting the effective conversion of energy. In related technologies, chambers are usually used to store compressed air. Traditional chambers usually use steel linings for support, but steel linings have obvious disadvantages. The cost of steel linings is high, resulting in high construction costs; the construction welding is difficult, resulting in a long construction time; the replacement of steel linings is difficult, resulting in difficult later maintenance and high maintenance costs; the heat insulation performance of steel linings is poor, resulting in increased energy loss during the operation of the compressed air energy storage system and poor sealing effect. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, the present invention provides a method for constructing a compressed air energy storage chamber.

[0005] In view of this, according to the embodiments of the present application, a method for constructing a compressed air energy storage chamber is proposed, including:

[0006] Obtain a basic chamber, and place an air cushion at the entrance of the chamber. Among them, the air cushion is of a double-layer structure, an air injection space is formed between the inner layer and the outer layer of the air cushion, and a gas storage space is formed inside the inner layer of the air cushion;

[0007] Inject gas into the air injection space to make the air cushion reach a preset size;

[0008] Inject concrete into the annulus between the basic chamber and the air cushion.

[0009] In a feasible implementation manner, the air cushion includes:

[0010] A first air injection port and a second air injection port, where the first air injection port is used to inject gas into the air injection space, and the second air injection port is used to inject compressed air into the gas storage space.

[0011] In a feasible implementation manner, the construction method further includes:

[0012] Before the initial setting of the above concrete, air is reciprocally injected into the above gas storage space through the above second air injection port.

[0013] In a feasible implementation manner, when compressed air is stored in the above gas storage space, the pressure in the above air injection space is greater than or equal to the pressure in the above gas storage space.

[0014] In a feasible implementation manner, the above air cushion further includes:

[0015] A pressure detection member for detecting the pressure of the above air injection space.

[0016] In a feasible implementation manner, the above air cushion further includes:

[0017] An air outlet for discharging the gas in the above air injection space when the pressure detection member detects that the pressure of the above air injection space is abnormal.

[0018] In a feasible implementation manner, when the above air cushion reaches a preset size, the outer contour shape of the above air cushion is a sphere or an ellipsoid.

[0019] In a feasible implementation manner, the material of the above air cushion includes neoprene and fluororubber.

[0020] In a feasible implementation manner, the above air cushion is provided with a coating, and the coating material includes polyurethane, fluoropolymer and silicone.

[0021] In a feasible implementation manner, the slump of the above concrete is 100 mm to 150 mm.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects: After obtaining the basic chamber in the method for constructing a compressed air energy storage chamber provided by the embodiment of the present application, an air cushion is placed at the entrance of the above-mentioned chamber. Among them, the air cushion is of a double-layer structure, an air injection space is formed between the inner layer and the outer layer of the air cushion, and a gas storage space is formed inside the inner layer of the air cushion, and compressed air is stored through the gas storage space. The air injection space of the above-mentioned air cushion is injected with gas so that the above-mentioned air cushion inflates and expands to a preset size; concrete is injected into the annulus between the above-mentioned basic chamber and the above-mentioned air cushion. With such a setting, compressed air can be stored through the gas storage space of the air cushion, and the gas in the air injection space insulates and keeps warm the compressed air in the gas storage space, so as to effectively reduce the influence of the change in the temperature of the compressed air on the surrounding rock during the compression stage and the release stage of the compressed air, reduce the damage to the surrounding rock, and ensure the energy storage efficiency of the compressed air energy storage chamber. The air cushion that reaches the preset size after inflation can be used as a mold for concrete, so that after the concrete solidifies, the inner contour shape of the concrete completely matches the outer contour shape of the air cushion, so that the air cushion and the concrete are more evenly stressed during the operation of the compressed air energy storage system, avoiding stress concentration generated by the irregular shape of the concrete during the use of the air cushion, which in turn leads to the failure of the air cushion seal and the reduction of the service life. And the concrete is used as the support structure of the compressed air energy storage chamber to improve the stability, without the need to erect a steel lining, the construction process is simple, the construction efficiency is improved, and the cost is low, reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0024] Figure 1 It is a schematic flow chart of the construction of a compressed air energy storage chamber according to an embodiment provided by the present application;

[0025] Figure 2 It is one of the schematic diagrams of the construction process of a compressed air energy storage chamber according to an embodiment provided by the present application;

[0026] Figure 3 It is the second schematic diagram of the construction process of a compressed air energy storage chamber according to an embodiment provided by the present application;

[0027] Figure 4 It is the third schematic diagram of the construction process of a compressed air energy storage chamber according to an embodiment provided by the present application;

[0028] Figure 5 It is the fourth schematic diagram of the construction process of a compressed air energy storage chamber according to an embodiment provided by the present application.

[0029] Among them, Figures 2 to 5 the corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0030] 200 Compressed air energy storage chamber, 210 Basic chamber, 220 Air cushion, 221 Gas injection space, 222 Gas storage space, 223 First gas injection port, 224 Second gas injection port, 225 Pressure detection component, 226 Gas outlet, 230 Concrete, 240 Surrounding rock. Specific implementation manners

[0031] To better understand the above technical solution, the technical solution of the embodiments of the present application will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solution of the embodiments of the present application, rather than limitations on the technical solution of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0032] As Figures 1 to 5 shown, a method for constructing a compressed air energy storage chamber 200 is proposed according to an embodiment of the present application, including:

[0033] Step S110: Obtain the basic chamber 210, and place the air cushion 220 at the entrance of the above chamber. Among them, the above air cushion 220 is a double-layer structure, and an air injection space 221 is formed between the inner layer and the outer layer of the above air cushion 220, and a gas storage space 222 is formed inside the inner layer of the above air cushion 220.

[0034] It can be understood that, as Figure 2 shown, the air cushion 220 is a double-layer structure, an air injection space 221 is formed between the inner layer and the outer layer of the air cushion 220, and a gas storage space 222 is formed inside the inner layer of the air cushion 220. Compressed air is stored through the gas storage space 222. The basic chamber 210 may be provided with an opening, and the uninflated air cushion 220 is placed in the basic chamber 210 at the opening.

[0035] Step S120: Inject gas into the above air injection space 221 to make the above air cushion 220 reach a preset size.

[0036] It can be understood that, as Figure 3 shown, after the air cushion 220 is placed in the basic chamber 210, gas injection operation can be performed on the air injection space 221 of the air cushion 220, so that the air injection space 221 expands, thereby making the air cushion 220 reach a preset size. An annulus is formed between the air cushion 220 and the basic chamber 210, and the gas storage space 222 inside the inner layer of the air cushion 220 unfolds.

[0037] Step S130: Inject concrete 230 into the annulus between the above basic chamber 210 and the above air cushion 220.

[0038] It is understandable that, as Figure 4 and Figure 5 shown, after the air cushion 220 is expanded to a preset size, the annulus between the basic chamber 210 and the air cushion 220 is filled with concrete 230. After the concrete 230 solidifies to reach the design strength, the inner contour surface of the concrete 230 and the outer contour surface of the air cushion 220 are completely fitted.

[0039] In summary, for the method for constructing the compressed air energy storage chamber 200 proposed in the embodiment of the present application, after obtaining the basic chamber 210, an air cushion 220 is placed at the entrance of the above-mentioned chamber; the air injection space 221 of the above-mentioned air cushion 220 is injected with air so that the above-mentioned air cushion 220 is inflated and expanded to a preset size; concrete 230 is injected into the annulus between the above-mentioned basic chamber 210 and the above-mentioned air cushion 220. With such a setting, compressed air is stored in the air storage space 222 of the air cushion 220, and the gas in the air injection space 221 insulates and keeps warm the compressed air in the air storage space 222, so as to effectively reduce the influence of the change in the temperature of the compressed air on the surrounding rock 240 during the compression stage and the release stage of the compressed air, reduce the damage to the surrounding rock 240, and ensure the energy storage efficiency of the compressed air energy storage chamber 200. The air cushion 220 that reaches the preset size after inflation can be used as a mold for the concrete 230, so that after the concrete 230 solidifies, the inner contour shape of the concrete 230 and the outer contour shape of the air cushion 220 are completely fitted, so that the air cushion 220 and the concrete 230 are more uniformly stressed during the operation of the compressed air energy storage system, and avoid stress concentration in the air cushion 220 caused by the irregular shape of the concrete 230, thereby causing the sealing performance of the air cushion 220 to fail and the service life to be reduced. Moreover, the concrete 230 serves as a support structure for the compressed air energy storage chamber 200 to improve stability. There is no need to erect a steel lining. The construction operations of the concrete 230 and the air cushion 220 can be completed at the opening of the basic chamber 210. The construction difficulty is low, the construction efficiency is improved, and the cost is low, reducing the construction cost.

[0040] In some examples, as Figures 1 to 5 shown, the above-mentioned air cushion 220 includes: a first air injection port 223 and a second air injection port 224, wherein the above-mentioned first air injection port 223 is used to inject air into the above-mentioned air injection space 221, and the above-mentioned second air injection port 224 is used to inject compressed air into the above-mentioned air storage space 222.

[0041] It can be understood that the air cushion 220 can be provided with a first air injection port 223 and a second air injection port 224. Among them, the first air injection port 223 is communicated with the air injection space 221, and the gas source can inject gas into the air injection space 221 through the first air injection port 223, so that the air injection space 221 expands, and the air cushion 220 reaches the preset size. The second air injection port 224 is communicated with the air storage space 222. After the construction of the compressed air energy storage chamber 200 is completed, compressed air can be transported to the air storage space 222 through the second air injection port 224 to store compressed air through the air storage space 222.

[0042] It should be noted that the first air injection port 223 can be provided with a first plug to block the first air injection port 223 through the first plug after the air injection space 221 is injected with air, so as to avoid air leakage. The second air injection port 224 can be provided with a second plug to block the second air injection port 224 through the second plug when the compressed air is stored in the air storage space 222, so as to avoid the leakage of compressed air and improve the reliability.

[0043] In some examples, the above construction method further includes: reciprocally injecting air into the air storage space 222 through the second air injection port 224 before the initial setting of the above-mentioned concrete 230.

[0044] It can be understood that as Figure 4 shown, after injecting the concrete 230 into the annulus between the basic chamber 210 and the air cushion 220, the compressed air energy storage chamber 200 construction method can reciprocally inject high-pressure gas into the air storage space 222 through the second air injection port 224, so that vibrations are generated on the outer layer of the air storage space 222, and the vibrations are transmitted to the concrete 230 to vibrate and compact the concrete 230, avoiding quality problems of the concrete 230 such as honeycombing and pitting caused by insufficient vibration. On the one hand, it can improve the forming quality of the concrete 230; on the other hand, it can vibrate and compact the concrete 230 without adding additional equipment, which is simple and efficient. And the concrete 230 will penetrate into the surrounding rock cracks under the action of the vibration pressure, further improving the stability of the surrounding rock 240.

[0045] In some examples, when the compressed air is stored in the above-mentioned air storage space 222, the pressure in the above-mentioned air injection space 221 is greater than or equal to the pressure in the above-mentioned air storage space 222.

[0046] It can be understood that when the compressed air is stored in the air storage space 222, the pressure in the air injection space 221 should always be kept greater than or equal to the pressure in the air storage space 222 to avoid deformation of the air cushion 220 due to pressure problems and damage to the air cushion 220, and improve the stability.

[0047] In some examples, as Figures 1 to 5As shown, the above-mentioned air cushion 220 further includes: a pressure detection member 225 for detecting the pressure in the above-mentioned air injection space 221.

[0048] It can be understood that the air cushion 220 can also be provided with a pressure detection member 225. Specifically, the pressure detection member 225 is communicated with the air injection space 221 to detect the pressure in the air injection space 221 in real time through the pressure detection member 225, so that the staff can understand the pressure condition of the air injection space 221 in real time, and can make a timely response when it is found that the pressure in the air injection space 221 is abnormal, thereby improving the reliability.

[0049] Exemplarily, the pressure detection member 225 can be provided with an alarm. When the pressure detection member 225 detects abnormal pressure, the alarm will emit a sound and light alarm to prompt the staff to quickly check the problem and repair or replace it in time.

[0050] In some examples, as Figures 1 to 5 shown, the above-mentioned air cushion 220 further includes: an air outlet 226 for discharging the gas in the above-mentioned air injection space 221 when the above-mentioned pressure detection member 225 detects abnormal pressure in the above-mentioned air injection space 221.

[0051] It can be understood that the air cushion 220 can also be provided with an air outlet 226. The air outlet 226 is communicated with the air injection space 221, and the gas in the air injection space 221 can be discharged through the air outlet 226 to cause the air cushion 220 to contract. Specifically, when the pressure detection member 225 detects abnormal pressure in the air injection space 221, such as leakage of the air cushion 220, the sealing effect of the air cushion 220 fails, resulting in a decrease in the pressure in the air injection space 221. After exceeding the preset pressure range, the air outlet 226 is opened to discharge the air in the air injection space 221. After the air cushion 220 contracts, the air cushion 220 is taken out from the opening of the basic chamber 210 for repair or replacement, so as to ensure the sealing performance of the basic chamber 210 during the compressed air energy storage process and improve the reliability. And after detecting that the pressure in the air injection space 221 is normal, the air outlet 226 is blocked to avoid air leakage.

[0052] In some examples, as Figures 3 to 5 shown, when the above-mentioned air cushion 220 reaches the preset size, the outer contour shape of the above-mentioned air cushion 220 is a sphere or an ellipsoid.

[0053] It can be understood that after injecting gas into the gas injection space 221 to make the air cushion 220 reach the preset size, the outer contour shape of the air cushion 220 can be a sphere or an ellipsoid, so that during the operation of compressed air energy storage, the force on the air cushion 220 is more uniform, and the service life of the air cushion 220 is extended. At the same time, since the air cushion 220 serves as a mold for the concrete 230, after the concrete 230 solidifies and takes shape, the inner contour shape of the concrete 230 and the outer contour shape of the air cushion 220 are completely consistent, so as to ensure that the force on the concrete 230 during the operation of compressed air energy storage is more uniform, and to avoid stress concentration on the air cushion 220 caused by the irregular shape of the concrete 230, which may lead to the failure of the airtightness of the air cushion 220, reduced service life, reduced later maintenance costs, and improved reliability. And after the concrete 230 solidifies, it serves as a support structure for the basic chamber 210, and the shape of the concrete 230 can ensure the overall stability of the compressed air energy storage chamber 200.

[0054] In some examples, the material of the above-mentioned air cushion 220 includes neoprene and fluororubber.

[0055] It can be understood that the air cushion 220 can be made of neoprene, which has good mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, chemical reagent resistance, and is suitable for storing compressed air. The air cushion 220 can also be made of fluororubber, which has excellent chemical stability and high temperature resistance, is not easy to break, has good mechanical properties, and is suitable for storing compressed air.

[0056] In some examples, the above-mentioned air cushion 220 is provided with a coating, and the coating material includes polyurethane, fluoropolymer and silicone.

[0057] It can be understood that the air cushion 220 can also be provided with a coating. Specifically, the coating material is one or more of polyurethane, fluoropolymer and silicone. Among them, polyurethane has the characteristics of high density, high strength, high toughness and wear resistance; fluoropolymer has excellent tear strength and good puncture resistance; silicone has high temperature stability, wear resistance and corrosion resistance. In this way, the airtightness and wear resistance of the air cushion 220 are enhanced through the coating, so as to improve the service life of the air cushion 220 and the reliability of the air cushion 220.

[0058] In some examples, the slump of the above-mentioned concrete 230 is 100 mm to 150 mm.

[0059] It can be understood that the fluidity, cohesiveness, and water retention of the concrete 230 with a slump of 100 mm to 150 mm are suitable for filling the annulus between the foundation chamber 210 and the outer layer of the air cushion 220 on the one hand; on the other hand, it ensures that when the air storage space 222 is reciprocally injected with gas, the vibration force of the outer layer of the air cushion 220 on the concrete 230 can compact the concrete 230; and on the third hand, it ensures the supportability of the concrete 230 after it solidifies to the preset strength.

[0060] In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected to", and "fixed" should all be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", and "rear" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation of the present invention.

[0062] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", and "specific embodiments" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0063] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for constructing a compressed air energy storage chamber, characterized in that: include: Obtain a basic chamber, and place an air cushion at the entrance of the chamber, wherein the air cushion is a double-layer structure, an air injection space is formed between the inner layer and the outer layer of the air cushion, and an air storage space is formed in the inner layer of the air cushion; Injecting air into the air injection space so that the air cushion reaches a preset size; Concrete is injected into the annulus between the foundation chamber and the air cushion.

2. The method for constructing a compressed air energy storage chamber according to claim 1, characterized in that: The air cushion comprises: A first gas injection port and a second gas injection port, wherein the first gas injection port is used to inject gas into the gas injection space, and the second gas injection port is used to inject compressed air into the gas storage space.

3. The method for constructing a compressed air energy storage chamber according to claim 2, characterized in that: The construction method also includes: Before the concrete initially sets, gas is reciprocally injected into the gas storage space through the second gas injection port.

4. The method for constructing a compressed air energy storage chamber according to claim 2, characterized in that: In the case where the air storage space stores compressed air, the pressure in the air injection space is greater than or equal to the pressure in the air storage space.

5. The method for constructing a compressed air energy storage chamber according to claim 2, characterized in that: The air cushion also includes: The pressure detection component is used to detect the pressure in the gas injection space.

6. The method for constructing a compressed air energy storage chamber according to claim 5, characterized in that: The air cushion also includes: The gas outlet is used to discharge the gas in the gas injection space when the pressure detection component detects that the pressure of the gas injection space is abnormal.

7. The method for constructing a compressed air energy storage chamber according to any one of claims 1 to 6, characterized in that: When the air cushion reaches a preset size, the outer contour of the air cushion is a sphere or an ellipsoid.

8. The method for constructing a compressed air energy storage chamber according to any one of claims 1 to 6, characterized in that: The material of the air cushion includes chloroprene rubber and fluororubber.

9. The method for constructing a compressed air energy storage chamber according to any one of claims 1 to 6, characterized in that: The air cushion is provided with a coating, and the coating material includes polyurethane, fluoropolymer and silicone.

10. The method for constructing a compressed air energy storage chamber according to any one of claims 1 to 6, characterized in that: The slump of the concrete is 100 mm to 150 mm.

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