Compressed air energy storage device

Abstract

The embodiment of the present application provides a compressed air energy storage device. The compressed air energy storage device includes: an inflation main pipe, an exhaust main pipe, a plurality of gas storage modules connected in parallel to the inflation main pipe and the exhaust main pipe, and a hydrophobic module arranged on the inflation main pipe and the exhaust main pipe. The gas storage modules are arranged in parallel in the horizontal direction; each gas storage module includes a pressure relief unit, a plurality of gas storage units connected in parallel to the inflation main pipe and the exhaust main pipe, and the plurality of gas storage units are arranged in layers from low to high in the vertical direction, and each gas storage unit includes a plurality of gas storage pipes connected in series. The site selection and layout of the compressed air energy storage device are more flexible, and large-scale gas storage can also be carried out. It occupies a small area, operates safely and reliably, is easy to inspect and maintain, has low pressure loss, and has smooth hydrophobicity.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electric power technology, and in particular to a compressed air energy storage device. Background Art

[0002] Compressed air energy storage technology, as a large-scale, long-term energy storage technology with large capacity, long cycle, safety, environmental protection and long life, has become one of the mainstream new energy storage technologies in recent years.

[0003] Compressed air energy storage often requires a large amount of gas storage space, depending on the storage capacity and duration. Currently, the main forms of gas storage are underground gas storage or above-ground high-pressure gas storage devices. Underground gas storage (for example, artificial chambers, underground salt caverns, and abandoned mines) are subject to severe geographical restrictions, with long initial exploration and construction times, and their long-term sealing and reliability lack sufficient engineering verification. Above-ground high-pressure gas storage devices are easy and quick to install, are not restricted by geographical location, and are easy to maintain. When underground gas storage is not available, they are the primary method for large-scale development of compressed air energy storage and one of the main routes for future compressed air energy storage research and development.

[0004] Existing above-ground high-pressure gas storage devices can use a single pressure vessel arrangement, but this approach has the disadvantages of being bulky, not compact, and having high investment costs. Therefore, the purpose of this application is to provide a new technical solution to address the existing technical deficiencies. Summary of the Invention

[0005] Based on this, the embodiments of the present application provide a compressed air energy storage device that occupies a small area, has more flexible site selection and layout, and has high safety and reliability.

[0006] The present application provides a compressed air energy storage device, comprising: an inflation main pipe, a deflation main pipe, a plurality of air storage modules connected in parallel to the inflation main pipe and the deflation main pipe, and a hydrophobic module provided on the inflation main pipe and the deflation main pipe, wherein the air storage modules are arranged in parallel in a horizontal direction;

[0007] Each gas storage module includes a pressure relief unit, multiple gas storage units connected in parallel to the inflation main pipe and the deflation main pipe, and the multiple gas storage units are layered from low to high in the vertical direction, and each gas storage unit includes multiple gas storage pipes connected in series.

[0008] In one embodiment, the multiple gas storage pipelines are connected by a connecting pipeline, the diameter of the connecting pipeline is smaller than that of the gas storage pipeline, and the multiple gas storage pipelines have the same slope.

[0009] In one embodiment, the pressure relief unit is provided at the connecting pipe between the topmost multiple gas storage pipes.

[0010] In one embodiment, the pressure relief unit includes a pressure relief controller, a first pressure relief subunit and a second pressure relief subunit connected in parallel, the first pressure relief subunit includes a first manual pressure relief valve and an electric pressure relief valve connected to the first manual pressure relief valve, and the second pressure relief subunit includes a second manual pressure relief valve and a safety valve connected to the second manual pressure relief valve;

[0011] The pressure relief controller controls the opening and closing state of the electric pressure relief valve according to the pressure value of the air in the air storage pipeline.

[0012] In one embodiment, the drain module includes a liquid level transmitter, a drain tank, a drain controller, a manual drain valve and an electric drain valve;

[0013] The liquid level transmitter is used to detect the liquid level value of the liquid in the drain tank and transmit the liquid level value to the drain controller;

[0014] The drain controller controls the opening and closing state of the electric drain valve according to the liquid level value.

[0015] In one embodiment, it further includes: a plurality of supports for supporting the gas storage pipeline, the supports on one side of the edge of the gas storage pipeline are fixed supports, and the remaining supports are sliding supports.

[0016] In one embodiment, the inlet of the gas storage module is provided with a first electric air inlet valve, a manual air inlet valve, an inlet temperature transmitter, an inlet pressure transmitter and an air inlet controller;

[0017] The inlet temperature transmitter is used to detect the inlet temperature value of the gas storage module and transmit the inlet temperature value to the air intake controller;

[0018] The inlet pressure transmitter is used to detect the inlet pressure value of the gas storage module and transmit the inlet pressure value to the air intake controller;

[0019] The intake controller controls the opening and closing state of the first electric intake valve according to the inlet pressure value or the inlet temperature value.

[0020] In one embodiment, the outlet of the gas storage module is provided with a manual air release valve, a first electric air release valve, an outlet temperature transmitter, an outlet pressure transmitter and an air release controller;

[0021] The outlet temperature transmitter is used to detect the outlet temperature value of the gas storage module and transmit the outlet temperature value to the deflation controller;

[0022] The outlet pressure transmitter is used to detect the outlet pressure value of the gas storage module and transmit the outlet pressure value to the deflation controller;

[0023] The purge controller controls the opening and closing state of the first electric purge valve according to the outlet temperature value or the outlet pressure value.

[0024] In one embodiment, maintenance platforms are provided at both ends of each layer of gas storage units, and the maintenance platforms are connected by maintenance stairs.

[0025] In one embodiment, the inlet of the inflation main pipe is provided with multiple second electric intake valves, a first check valve and a first flow detection unit, and the outlet of the deflation main pipe is provided with multiple second electric deflation valves, a second check valve and a second flow detection unit.

[0026] In the compressed air energy storage device provided in the embodiment of the present application, multiple series-connected gas storage pipelines are arranged in layers from low to high in the vertical direction, so that the gas storage pipelines are compactly arranged, the space is used rationally, the gas storage volume per unit area is increased, and the floor space is saved; the multiple series-connected gas storage pipelines are connected in parallel to the inflation main pipe and the deflation main pipe, so that the internal operating parameters of each gas storage pipeline are consistent with those of the main pipe, and the multiple gas storage pipelines are connected in series to form a larger gas storage space, which can buffer the parameter fluctuations caused by the wide-load operation of the energy storage system, thereby avoiding large deviations in the parameters during the gas storage and deflation process, thereby improving the safety and reliability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a compressed air energy storage device provided in an embodiment of the present application;

[0028] Figure 2 A partial schematic diagram of a compressed air energy storage device provided in an embodiment of the present application;

[0029] Figure 3 Another partial schematic diagram of the compressed air energy storage device provided in an embodiment of the present application;

[0030] Figure 4 A schematic plan view of a compressed air energy storage device provided in an embodiment of the present application;

[0031] Figure 5 A schematic cross-sectional view of a compressed air energy storage device provided in an embodiment of the present application;

[0032] Reference numerals:

[0033] 1: Gas storage unit; 2: Pressure relief controller; 3: First manual pressure relief valve; 4: Electric pressure relief valve;

[0034] 5: Second manual pressure relief valve; 6: Safety valve; 7: Liquid level transmitter; 8: Drain tank;

[0035] 9: Drain controller; 10: Manual drain valve; 11: Electric drain valve;

[0036] 12: First electric air intake valve; 13: Manual air intake valve; 14: Inlet temperature transmitter;

[0037] 15: Inlet pressure transmitter; 16: Air intake controller; 17: Manual air release valve;

[0038] 18: First electric air release valve; 19: Outlet temperature transmitter; 20: Outlet pressure transmitter;

[0039] 21: air release controller; 22: second electric air intake valve; 23: first check valve;

[0040] 24: First flow detection unit; 25: Second electric air release valve; 26: Second check valve;

[0041] 27: Second flow detection unit; 28: Maintenance platform; 29: Maintenance stairs;

[0042] 30: Fixed support; 31: Sliding support. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions, and advantages of this application more clearly understood, the technical solutions in the embodiments of this application are further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate this application and are not intended to limit this application. It should also be noted that, for ease of description, the accompanying drawings only show parts relevant to this application, not all structures.

[0044] See also Figure 1-Figure 3 The compressed air energy storage device may include: an inflation main pipe, a deflation main pipe, multiple gas storage modules connected in parallel to the inflation main pipe and the deflation main pipe, and a hydrophobic module arranged on the inflation main pipe and the deflation main pipe, and the gas storage modules are arranged in parallel in the horizontal direction; each gas storage module includes a pressure relief unit, multiple gas storage units 1 connected in parallel to the inflation main pipe and the deflation main pipe, and the multiple gas storage units 1 are arranged in layers from low to high in the vertical direction, and each gas storage unit 1 includes multiple gas storage pipes connected in series.

[0045] Specifically, the gas storage pipeline can be made of high-strength pipeline steel, for example, L555M or X80 pipeline steel is used as the gas storage pipeline. Multiple gas storage pipelines connected in series form a gas storage unit 1 with a larger gas storage space, and the inflation ports of the multiple gas storage units 1 are connected to the inflation main pipe in parallel, and the deflation ports are connected to the deflation main pipe, thereby forming a gas storage module. The gas storage units 1 in the gas storage module are arranged in layers from low to high in the vertical direction. Take the gas storage module containing 4 gas storage units 1 as an example, Figure 1As shown, the gas storage module can include four gas storage units 1, arranged vertically from low to high on the first, second, third, and fourth layers, respectively. These four gas storage units 1 are connected in parallel to the main charging and deflation pipes, and each gas storage unit 1 includes two series-connected gas storage pipes. Furthermore, multiple gas storage modules can be configured based on actual gas storage needs. These modules are arranged horizontally in parallel and connected in parallel to the main charging and deflation pipes. By arranging the gas storage pipes in multiple layers vertically and in parallel horizontally, the gas storage pipes are compactly arranged, space is used rationally, and the gas storage capacity per unit area is increased, saving floor space.

[0046] In addition, by connecting multiple gas storage modules in parallel, if a gas storage module experiences an accident such as leakage, overheating, overpressure, or low temperature, it can be easily isolated from the compressed air energy storage device for maintenance, ensuring the normal operation of other gas storage modules and preventing the entire compressed air energy storage device from being shut down due to maintenance of certain gas storage modules. Furthermore, it can ensure that each gas storage module can be repaired in an orderly manner according to plan without affecting other gas storage modules, thereby increasing the annual operating hours and operational flexibility of the compressed air energy storage device. Optionally, the multiple gas storage pipelines within the gas storage unit 1 are connected by connecting pipelines. The connecting pipelines have a smaller diameter than the gas storage pipelines, which can absorb the thermal stress generated by inconsistent thermal displacement, thereby reducing the risk of accidents caused by cracking of pipeline welds.

[0047] During the inflation process, as air pressure rises, small water droplets condense and adhere to the pipe walls. To reduce corrosion caused by these accumulated water droplets, drain modules can be installed on the main inflation and deflation pipes to drain water from the pipes. Optionally, a slope can be set for the multiple pipes to allow water to drain smoothly into the drain modules, ensuring smooth drainage and minimizing corrosion. Optionally, the multiple pipes can have the same slope, preferably greater than or equal to 0.5%, to prevent freezing of the pipes.

[0048] In addition, compared with the gas storage pipeline, the diameters of the above-mentioned inflation main pipe and deflation main pipe are smaller. A hydrophobic module is set on the inflation main pipe and deflation main pipe with smaller diameters, and a hole is not opened on the gas storage pipeline body with larger diameter to set up a hydrophobic module, which reduces the risk of gas leakage in the gas storage pipeline.

[0049] Optionally, multiple gas storage pipelines are connected by connecting pipelines, and the diameter of the connecting pipelines is smaller than that of the gas storage pipelines. Each gas storage module is also provided with a pressure relief unit for performing a pressure relief operation when the air pressure in the gas storage pipeline exceeds the limit, thereby ensuring the reliable operation of the gas storage pipeline. Optionally, the pressure relief unit is provided at the connecting pipeline between the multiple gas storage pipelines on the top layer to facilitate maintenance operations. In addition, connecting pipelines are provided in the gas storage pipeline for installing safety pressure relief units and operating parameter measurement points, which avoids the need to drill holes in the gas storage pipeline body and pipeline heads, eliminates the need for local reinforcement, improves the integrity of the gas storage pipeline, and improves the safety and reliability of the system operation.

[0050] Further, optionally, see Figure 2 The pressure relief unit includes a pressure relief controller 2, a first pressure relief subunit, and a second pressure relief subunit connected in parallel. The first pressure relief subunit includes a first manual pressure relief valve 3 and an electric pressure relief valve 4 connected to the first manual pressure relief valve 3. The second pressure relief subunit includes a second manual pressure relief valve 5 and a safety valve 6 connected to the second manual pressure relief valve 5. The pressure relief controller 2 controls the opening and closing states of the electric pressure relief valve 4 according to the pressure of the air in the gas storage pipeline. For example, during the inflation process, if the pressure of the air in the gas storage pipeline exceeds the limit, the pressure relief controller 2 controls the electric pressure relief valve 4 to open. In addition, if the pressure of the air in the gas storage pipeline exceeds the limit, the safety valve 6 can also automatically open to release gas and reduce the pressure in the gas storage pipeline. When the pressure of the air in the gas storage pipeline drops to the preset operating pressure, the electric pressure relief valve 4 is controlled to close.

[0051] By setting up multiple pressure relief valves, the pressure can be released smoothly when the air pressure in the gas storage pipeline exceeds the limit, ensuring the safe and reliable operation of the gas storage pipeline.

[0052] Optionally, the above-mentioned drain module may include a liquid level transmitter 7, a drain tank 8, a drain controller 9, a manual drain valve 10 and an electric drain valve 11; the liquid level transmitter 7 is used to detect the liquid level value of the liquid in the drain tank 8 and transmit the liquid level value to the drain controller 9; the drain controller 9 controls the opening and closing state of the electric drain valve 11 according to the liquid level value.

[0053] During the inflation process, as the air pressure increases, small water droplets will condense and precipitate in the gas storage pipe and adhere to the wall of the gas storage pipe. When there are enough small water droplets, they will gather to form small water droplets and flow into the bottom of the gas storage pipe. Then, they will flow into the drain tank 8 in the inflation main pipe or the deflation main pipe along the slope of the gas storage pipe (slope ≥ 0.5%). The liquid level in the drain tank 8 gradually increases. When it reaches a certain level, the electric drain valve 11 is opened through the interlocking of the liquid level transmitter 7 and the drain controller 9, and the collected drain is discharged into the collection well and finally flows into the rainwater well.

[0054] Optionally, the inlet of the gas storage module is provided with a first electric intake valve 12, a manual intake valve 13, an inlet temperature transmitter 14, an inlet pressure transmitter 15, and an intake controller 16. The inlet temperature transmitter 14 is used to detect the inlet temperature value of the gas storage module and transmit the inlet temperature value to the intake controller 16. The inlet pressure transmitter 15 is used to detect the inlet pressure value of the gas storage module and transmit the inlet pressure value to the intake controller 16. The intake controller 16 controls the opening and closing state of the first electric intake valve 12 according to the inlet pressure value or the inlet temperature value. For example, during the inflation process, if the inlet temperature value of the gas storage module is detected to be overtemperature, the first electric intake valve 12 is controlled to close, and the gas storage module stops inflating. When the inlet temperature value of the gas storage module drops to the preset operating temperature and it is found that the temperature continues to drop, the first electric intake valve 12 is controlled to open to continue inflation. For another example, during the inflation process, if it is detected that the inlet pressure value of the gas storage module exceeds the limit, the first electric air intake valve 12 is controlled to close, and the gas storage module stops inflating.

[0055] In this embodiment, a valve interlock related to the operating temperature and operating pressure is set at the inlet of the gas storage module. In this way, when the inflation parameters do not meet the requirements, the gas storage module can be closed in time to improve the safety of inflation. In addition, by setting multiple valves, the reliability of the air intake control can be ensured.

[0056] Optionally, the outlet of the gas storage module is provided with a manual purge valve 17, a first electric purge valve 18, an outlet temperature transmitter 19, an outlet pressure transmitter 20, and a purge controller 21. The outlet temperature transmitter 19 is used to detect the outlet temperature of the gas storage module and transmit the outlet temperature value to the purge controller 21. The outlet pressure transmitter 20 is used to detect the outlet pressure value of the gas storage module and transmit the outlet pressure value to the purge controller 21. The purge controller 21 controls the opening and closing state of the first electric purge valve 18 based on the outlet temperature value or the outlet pressure value. For example, when the outlet temperature value is too low, the first electric purge valve 18 is controlled to close, stopping purge. When the outlet pressure value is abnormal, the first electric purge valve 18 is controlled to close, stopping purge.

[0057] In this embodiment, a valve interlock related to the operating temperature is installed at the outlet of the gas storage module to prevent the temperature from falling below the lower limit of the gas storage pipeline material, thereby ensuring the safety and life of the gas storage pipeline. The installation of multiple valves ensures the reliability of the gas release control.

[0058] Alternatively, see Figure 3 The inlet of the inflation main pipe is provided with multiple second electric intake valves 22, a first check valve 23 and a first flow detection unit 24, and the outlet of the deflation main pipe is provided with multiple second electric deflation valves 25, a second check valve 26 and a second flow detection unit 27.

[0059] The purpose of setting multiple valves on both the inflation main pipe and the deflation main pipe is to ensure that the compressed air energy storage device and the external process system can be well isolated. The purpose of setting the check valve is to prevent air backflow. The first flow detection unit 24 and the second flow detection unit 27 are set to obtain the inflation flow and the deflation flow.

[0060] Alternatively, as Figure 4 As shown, maintenance platforms 28 are provided at both ends of each layer of gas storage units 1, and each maintenance platform 28 is connected by a maintenance staircase 29. The maintenance of each layer of gas storage units 1 can be achieved through the maintenance stairs and the inspection platform, which improves the convenience of maintenance and operation.

[0061] Alternatively, as Figure 5 As shown, the compressed air energy storage device also includes a plurality of supports (such as fixed supports 30 and sliding supports 31) for supporting the gas storage pipeline. The support on one side of the edge of the gas storage pipeline is a fixed support 30, and the remaining supports are sliding supports 31. Among them, the multiple supports can be arranged at equal intervals or at unequal intervals, which is not limited in this embodiment. The fixed support 30 refers to a support with a fixed position, and the sliding support 31 refers to a support with a variable position. For example, the support on the side of the gas storage pipeline close to the inflation main pipe and the deflation main pipe can be set as a fixed support, and the remaining supports can be set as sliding supports.

[0062] By setting the supports on one side of the edge of the gas storage pipeline as fixed supports and the remaining supports as sliding supports, it can be ensured that the thermal expansion and thermal displacement of one end of each gas storage pipeline in the same gas storage module are basically the same, reducing the generation of thermal stress and thus ensuring the safe and reliable operation of the gas storage pipeline.

[0063] Next, based on the above compressed air energy storage device, the operation process of the compressed air energy storage device is described in detail:

[0064] 1. Inflating operation process and monitoring and protection process:

[0065] When the compressed air energy storage device is inflated, the second electric air release valve 25 on the air release main pipe, the first electric air release valve 18 on the air storage module outlet pipe, and the manual air release valve 17 are in a closed state. The second electric air intake valve 22 on the inflation main pipe and the first electric air intake valve 12 and the manual air intake valve 13 on the air storage module inlet pipe are opened. The compressed air energy storage device gradually starts to inflate from the lowest pressure. After reaching the highest pressure, the second electric air intake valve 22 on the inflation main pipe and the first electric air intake valve 12 and the manual air intake valve 13 on the air storage module inlet pipe are closed, and the inflation process ends.

[0066] Each energy storage module in the compressed air energy storage device is equipped with a thermal resistor temperature measuring point on its inlet and outlet pipes, as well as on the main pipe inlet and outlet pipes, to monitor the corresponding temperature values. In addition, the compressed air energy storage device is also equipped with an alarm to sound an alarm when the gas storage pipe temperature is abnormal. For all temperature measuring points, an alarm is triggered when the temperature of any measuring point is less than the first preset temperature value (during the deflation process, such as the first preset temperature value of -20°C) or when the temperature of any measuring point is greater than the second preset temperature value (during the inflation process, such as the second preset temperature value of 60°C). This ensures that an alarm is triggered when the temperature at each measuring point is too high or too low.

[0067] During the inflation process, if the temperature at the inlet pipe of the gas storage module is monitored to be greater than a third preset temperature value (for example, the third preset temperature value may be 63°C), the inlet controller 16 closes the first electric inlet valve 12 of the group, and inflation of the gas storage module stops. When the inlet pipe temperature of the gas storage module drops below the second preset temperature value and the temperature continues to drop, the inlet controller 16 opens the first electric inlet valve 12 of the group, and inflation continues.

[0068] Furthermore, the compressed air energy storage device is also provided with an overpressure alarm function, which triggers an alarm when the pressure of the gas storage pipeline is greater than the maximum operating pressure.

[0069] The first electric air intake valve 12 is provided with a pressure interlock. During the inflation process, when the pressure of the air storage module inlet pipe or the air storage pipe is greater than the maximum operating pressure (such as 10MPa), the first electric air intake valve 12 of the group is closed through the air intake controller 16, and the air storage module stops inflating.

[0070] During the inflation process, the electric pressure relief valve 4 is interlocked. When the pressure in the gas storage pipeline is ≥ the first preset pressure value, the electric pressure relief valve 4 is opened by the pressure relief controller 2 to release the gas; when the pressure in the gas storage pipeline is < the above-mentioned first preset pressure value, the electric pressure relief valve 4 is closed by the pressure relief controller 2, and the gas storage module continues to inflate.

[0071] When the pressure in the gas storage pipeline exceeds a second preset pressure value (where the second preset pressure value is greater than the first preset pressure value), the safety valve 6 automatically opens to release gas. When the pressure is lower than the return pressure of the safety valve 6, the safety valve 6 closes, and the gas storage module continues to inflate.

[0072] 2. Deflation operation process and monitoring and protection process:

[0073] When the compressed air energy storage device is ready to be deflated, the second electric air inlet valve 22 on the inflation main pipe and the first electric air inlet valve 12 and the manual air inlet valve 13 on the inlet pipe of the air storage module are in a closed state. The second electric air release valve 25 on the deflation main pipe, the first electric air release valve 18 and the manual air release valve 17 on the outlet pipe of the air storage module are opened, and the compressed air energy storage device is gradually deflated from the highest pressure to the lowest pressure. Then, the second electric air release valve 25 on the deflation main pipe, the first electric air release valve 18 and the manual air release valve 17 on the outlet pipe of the air storage module are closed, and the deflation process ends.

[0074] During the deflation process, when the compressed air temperature at a certain measuring point is monitored to be lower than the design temperature (such as -23°C), the deflation controller 21 controls the first electric deflation valve 18 of the air storage module to close, and the air storage module stops deflation.

[0075] 3. Leakage monitoring and control process:

[0076] Method 1: When there is a leak in the compressed air energy storage device, when the leak pressure exceeds 0.4 MPa, a lot of noise will be generated. The sound decibel monitoring can be used to determine the air storage module where the leak is located, and the first electric air intake valve 12 of the air storage module can be closed to isolate it from the entire compressed air energy storage device without affecting the operation of other air storage modules.

[0077] Method 2: Pressure measuring points are arranged on the connecting pipes between the topmost gas storage pipes in each gas storage module. When a leak occurs at any point in the gas storage module, the pressure display drops significantly. At this time, the first electric air intake valve 12 of the gas storage module is closed through interlocking to stop inflation.

[0078] Furthermore, in order to detect the leakage point in time, pressure measuring points can be arranged on the connecting pipes of each layer of gas storage pipeline in the gas storage module to accurately and timely monitor the location of the leakage point, and the first electric air intake valve 12 of the gas storage module can be closed in time through interlocking to stop inflation.

[0079] 4. Drain control process: During the inflation process, as the air pressure increases, small water droplets will condense and precipitate in the gas storage pipe and adhere to the wall of the gas storage pipe. When there are enough small water droplets, they will gather to form small water droplets and flow into the bottom of the gas storage pipe. Then, they will flow into the drain tank 8 in the inflation main pipe or the deflation main pipe along the slope of the gas storage pipe (slope ≥ 0.5%). The liquid level in the drain tank 8 gradually increases. When it reaches a certain level, the electric drain valve 11 is opened through the interlocking of the liquid level transmitter 7 and the drain controller 9, and the collected drain is discharged into the water collection well and finally flows into the rainwater well.

[0080] In summary, the compressed air energy storage device provided in the embodiment of the present application has more flexible site selection and layout, can also be used for large-scale gas storage, occupies a small area, operates safely and reliably, is easy to repair and maintain, has low pressure loss and smooth water drainage.

[0081] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A compressed air energy storage device, characterized in that: include: An inflation main pipe, a deflation main pipe, a plurality of gas storage modules connected in parallel to the inflation main pipe and the deflation main pipe, and a hydrophobic module provided on the inflation main pipe and the deflation main pipe, wherein the gas storage modules are arranged in parallel in the horizontal direction; Each gas storage module includes a pressure relief unit, a plurality of gas storage units connected in parallel to the inflation main pipe and the deflation main pipe, and the plurality of gas storage units are arranged in layers from low to high in the vertical direction, and each gas storage unit includes a plurality of gas storage pipes connected in series; Wherein, the multiple gas storage pipelines are connected by connecting pipelines, the diameter of the connecting pipelines is smaller than that of the gas storage pipelines, and the multiple gas storage pipelines have the same slope; The pressure relief unit is arranged at the connecting pipe between the multiple gas storage pipes on the uppermost layer; The diameters of the inflation main pipe and the deflation main pipe are smaller than those of the gas storage pipe; The compressed air energy storage device further includes: a plurality of supports for supporting the gas storage pipeline, wherein the supports on one side of the edge of the gas storage pipeline are fixed supports, and the remaining supports are sliding supports.

2. The compressed air energy storage device according to claim 1, characterized in that: The pressure relief unit includes a pressure relief controller, a first pressure relief subunit and a second pressure relief subunit connected in parallel, the first pressure relief subunit includes a first manual pressure relief valve and an electric pressure relief valve connected to the first manual pressure relief valve, and the second pressure relief subunit includes a second manual pressure relief valve and a safety valve connected to the second manual pressure relief valve; The pressure relief controller controls the opening and closing state of the electric pressure relief valve according to the pressure value of the air in the air storage pipeline.

3. The compressed air energy storage device according to claim 1, characterized in that: The drain module includes a liquid level transmitter, a drain tank, a drain controller, a manual drain valve and an electric drain valve; The liquid level transmitter is used to detect the liquid level value of the liquid in the drain tank and transmit the liquid level value to the drain controller; The drain controller controls the opening and closing state of the electric drain valve according to the liquid level value.

4. The compressed air energy storage device according to claim 1, characterized in that: The inlet of the gas storage module is provided with a first electric air inlet valve, a manual air inlet valve, an inlet temperature transmitter, an inlet pressure transmitter and an air inlet controller; The inlet temperature transmitter is used to detect the inlet temperature value of the gas storage module and transmit the inlet temperature value to the air intake controller; The inlet pressure transmitter is used to detect the inlet pressure value of the gas storage module and transmit the inlet pressure value to the air intake controller; The intake controller controls the opening and closing state of the first electric intake valve according to the inlet pressure value or the inlet temperature value.

5. The compressed air energy storage device according to claim 1, characterized in that: The outlet of the gas storage module is provided with a manual air release valve, a first electric air release valve, an outlet temperature transmitter, an outlet pressure transmitter and an air release controller; The outlet temperature transmitter is used to detect the outlet temperature value of the gas storage module and transmit the outlet temperature value to the deflation controller; The outlet pressure transmitter is used to detect the outlet pressure value of the gas storage module and transmit the outlet pressure value to the deflation controller; The purge controller controls the opening and closing state of the first electric purge valve according to the outlet temperature value or the outlet pressure value.

6. The compressed air energy storage device according to claim 1, characterized in that: There are maintenance platforms at both ends of each gas storage unit, and the maintenance platforms are connected by maintenance stairs.

7. The compressed air energy storage device according to claim 1, characterized in that: The inlet of the inflation main pipe is provided with a plurality of second electric intake valves, a first check valve and a first flow detection unit, and the outlet of the deflation main pipe is provided with a plurality of second electric deflation valves, a second check valve and a second flow detection unit.

Images