Compressed air energy storage device

Abstract

The embodiment of the invention provides a compressed air energy storage device. The compressed air energy storage device comprises an inflation mother pipe, a deflation mother pipe, a plurality of air storage modules connected to the inflation mother pipe and the deflation mother pipe in parallel and drainage modules arranged on the inflation mother pipe and the deflation mother pipe, and the air storage modules are arranged in parallel in the horizontal direction; each air storage module comprises a pressure relief unit and a plurality of air storage units connected to the inflation mother pipe and the deflation mother pipe in parallel, the air storage units are arranged in a layered mode from low to high in the vertical direction, and each air storage unit comprises a plurality of air storage pipelines connected in series. The compressed air energy storage device is more flexible in site selection and arrangement mode, capable of achieving large-scale air storage, small in occupied area, safe and reliable in operation, convenient to overhaul, operate and maintain, small in pressure loss and smooth in drainage.

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 gas storage space according to the energy storage capacity and duration. The main forms of gas storage are currently underground gas storage or above-ground high-pressure gas storage. Underground gas storage (for example, artificial chambers, underground salt caverns, 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, not restricted by geographical locations, and easy to maintain. When there are no geographical conditions for underground gas storage, they are the main way to develop compressed air energy storage on a large scale, and are also one of the main routes for the future research and development of compressed air energy storage.

[0004] The existing ground high-pressure gas storage device can adopt a single-tank arrangement of a pressure vessel, but the disadvantages of this method are that the single tank is large in size, the arrangement is not compact enough and the investment cost is high. Based on this, the purpose of this application is to provide a new technical solution to solve the existing technical defects. Summary of the invention

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

[0006] The embodiment of the present application provides a compressed air energy storage device, comprising: an inflation main pipe, an exhaust main pipe, a plurality of air 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, wherein the air storage modules are arranged in parallel in a horizontal direction;

[0007] 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 along the vertical direction, and each gas storage unit includes a plurality of 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 of the embodiments, the pressure relief unit is disposed at a connecting pipe between multiple gas storage pipes on the top layer.

[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 of the embodiments, 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 intake valve, a manual air intake valve, an inlet temperature transmitter, an inlet pressure transmitter and an air intake 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 of the embodiments, 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 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.

[0026] In the compressed air energy storage device provided in the embodiment of the present application, multiple series-connected gas storage pipes are arranged in layers from low to high in the vertical direction, so that the gas storage pipes are compactly arranged and the space is used reasonably, the gas storage volume per unit area is increased, and the floor space is saved; the multiple series-connected gas storage pipes are connected in parallel to the inflation mother pipe and the deflation mother pipe, so that the internal operating parameters of each gas storage pipe are consistent with the mother pipe, and the multiple gas storage pipes 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 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 diagram of the structure 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 a 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 cross-sectional schematic diagram 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: The 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 purpose, technical solutions and advantages of the present application more clearly understood, the technical solutions in the embodiments of the present application are further described in detail through the following embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. It should also be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, rather than 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, a plurality of 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, a plurality of gas storage units 1 connected in parallel to the inflation main pipe and the deflation main pipe, and the plurality of gas storage units 1 are arranged in layers from low to high in the vertical direction, and each gas storage unit 1 includes a plurality of gas storage pipelines 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 mother pipe in parallel, and the deflation ports are connected to the deflation mother 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 1 As shown, the gas storage module may include 4 gas storage units 1, each gas storage unit 1 is arranged in the first layer, the second layer, the third layer and the fourth layer from low to high in the vertical direction, and the 4 gas storage units 1 are connected in parallel to the inflation main pipe and the deflation main pipe, and each gas storage unit 1 includes 2 gas storage pipes connected in series; at the same time, multiple gas storage modules can be configured according to actual gas storage needs, and the multiple gas storage modules are arranged in parallel in the horizontal direction and connected in parallel to the inflation main pipe and the deflation main pipe. By arranging the gas storage pipes in multiple layers in the vertical direction and arranging the gas storage pipes in parallel in the horizontal direction, the gas storage pipes are arranged compactly, the space is used reasonably, the gas storage volume per unit area is increased, and the floor space is saved.

[0046] In addition, multiple gas storage modules are connected in parallel. In this way, when a gas storage module has an accident such as leakage, over-temperature, over-pressure, or low temperature, it can be smoothly isolated from the compressed air energy storage device for maintenance to ensure the normal operation of other gas storage modules and avoid the shutdown of the entire compressed air energy storage device due to the maintenance of some gas storage modules; and it can also ensure that each gas storage module can be repaired in an orderly manner according to the plan without affecting other gas storage modules, thereby increasing the annual operating hours and operating flexibility of the compressed air energy storage device. Optionally, multiple gas storage pipelines in the gas storage unit 1 are connected by connecting pipelines, and the diameter of the connecting pipeline is smaller than that of the gas storage pipeline, 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 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. In order to reduce the corrosion of the gas storage pipe by the accumulated water droplets, a drainage module can be set on the inflation main pipe and the deflation main pipe to drain the water in the gas storage pipe. Optionally, a certain slope can be set for multiple gas storage pipes so that the water in the gas storage pipes can be smoothly discharged into the drainage module, ensuring smooth drainage and reducing corrosion to the gas storage pipe. Optionally, multiple gas storage pipes have the same slope, and the above slope can be greater than or equal to 0.5%, using drainage and gas storage pipe antifreeze.

[0048] In addition, compared with the gas storage pipeline, the diameters of the above-mentioned inflation mother pipe and deflation mother pipe are smaller. A drain module is set on the inflation mother pipe and deflation mother pipe with smaller diameters, and a hole is not opened on the gas storage pipeline body with larger diameter to set the drain module, thereby reducing 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, which is used to perform 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 arranged at the connecting pipeline between the top multiple gas storage pipelines to facilitate maintenance operations. In addition, a connecting pipeline is provided in the gas storage pipeline for installing a safety pressure relief unit and an operating parameter measuring point, which avoids opening holes in the gas storage pipeline body and the pipeline head, and eliminates the need for local reinforcement, thereby improving the integrity of the gas storage pipeline and 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, and 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 state of the electric pressure relief valve 4 according to the pressure value of the air in the gas storage pipeline. For example, during the inflation process, when the pressure value 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, when the pressure value of the air in the gas storage pipeline exceeds the limit, the safety valve 6 can also be automatically opened to release the gas and reduce the pressure of the gas storage pipeline. When the pressure value 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, and 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 of 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 and 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 it is detected that the inlet temperature value of the gas storage module is over-temperature, the first electric intake valve 12 is controlled to be closed, and the gas storage module stops inflating; when the inlet temperature value of the gas storage module is reduced to the preset operating temperature, and it is found that the temperature continues to drop, the first electric intake valve 12 is controlled to be opened 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 intake control can be ensured.

[0056] Optionally, the outlet of the gas storage module is provided with a manual deflation valve 17 and a first electric deflation valve 18, an outlet temperature transmitter 19, an outlet pressure transmitter 20 and a deflation controller 21; the outlet temperature transmitter 19 is used to detect the outlet temperature value of the gas storage module, and transmit the outlet temperature value to the deflation controller 21; the outlet pressure transmitter 21 is used to detect the outlet pressure value of the gas storage module, and transmit the outlet pressure value to the deflation controller 21, and the deflation controller 21 controls the opening and closing state of the first electric deflation valve 18 according to the outlet temperature value or the outlet pressure value. For example, when the outlet temperature value is too low, the first electric deflation valve 18 is controlled to be closed and deflation is stopped; when the outlet pressure is abnormal, the first electric deflation valve 18 is controlled to be closed and deflation is stopped.

[0057] In this embodiment, a valve interlock related to the operating temperature is set at the outlet of the gas storage module to prevent the temperature from being too low and exceeding the lower limit of the material of the gas storage pipeline, thereby ensuring the safety and life of the gas storage pipeline. Multiple valves are set to ensure the reliability of the deflation control.

[0058] Alternatively, see Figure 3 The inlet of the inflation main pipe is provided with a plurality of 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 a plurality of 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 can obtain the inflation flow and the deflation flow.

[0060] Alternatively, if 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 staircase and the inspection platform, which improves the convenience of maintenance and operation.

[0061] Alternatively, if Figure 5 As shown, the compressed air energy storage device also includes a plurality of supports (such as a fixed support 30 and a sliding support 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 one side of the gas storage pipeline close to the inflation mother pipe and the deflation mother pipe can be set as a fixed support, and the remaining supports can be set as sliding supports.

[0062] By setting the support on one side of the edge of the gas storage pipeline as a fixed support and the other 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, thereby 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 specifically introduced:

[0064] 1. Inflatable 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, and 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] The inlet pipe, outlet pipe and main pipe inlet and outlet pipes of each energy storage module in the compressed air energy storage device are equipped with thermal resistor temperature measuring points to monitor the corresponding temperature values. In addition, the compressed air energy storage device is also equipped with an alarm to alarm when the temperature of the gas storage pipe is abnormal. For all temperature measuring points, when the temperature of any measuring point is less than the first preset temperature value (deflation process, such as the first preset temperature value is -20°C) or when the temperature of any measuring point is greater than the second preset temperature value (inflation process, such as the second preset temperature value is 60°C), an alarm is sounded. Ensure that the alarm can be sounded when the temperature of 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 first electric air intake valve 12 of the group is closed through the air intake controller 16, and the gas storage module stops inflating. When the inlet pipe temperature of the gas storage module drops below the second preset temperature value and it is found that the temperature continues to drop, the first electric air intake valve 12 of the group is opened through the air intake controller 16 to continue inflating.

[0068] Furthermore, the compressed air energy storage device is also provided with an overpressure alarm function, and the alarm is triggered 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 3 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 the second preset pressure value (where the second preset pressure value>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 first electric deflation valve 18 of the air storage module is controlled to be closed through the deflation controller 21, 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 0.4MPa, a lot of noise will be generated. The air storage module where the leak is located can be determined through sound decibel monitoring, 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 uppermost 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 pipelines 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 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, and flow into the drain tank 8 in the inflation mother pipe or the deflation mother pipe along the slope of the gas storage pipe (slope ≥ 0.5%). The liquid level of 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.

[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 perform large-scale gas storage, occupies a small area, operates safely and reliably, is easy to inspect and maintain, has low pressure loss and smooth drainage.

[0081] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A compressed air energy storage device, characterized in that: include: 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, 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 along the vertical direction, and each gas storage unit includes a plurality of gas storage pipes connected in series.

2. The compressed air energy storage device according to claim 1, characterized in that: 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.

3. The compressed air energy storage device according to claim 2, characterized in that: The pressure relief unit is arranged at the connecting pipe between the uppermost multiple gas storage pipes.

4. 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.

5. 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.

6. The compressed air energy storage device according to claim 1, characterized in that: Also includes: A plurality of supports are used to support the gas storage pipeline, wherein the support on one side of the edge of the gas storage pipeline is a fixed support, and the remaining supports are sliding supports.

7. 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.

8. 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.

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

10. 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.

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