Compressed air overground gas storage device

Abstract

The invention provides a compressed air overground gas storage device. The compressed air overground gas storage device comprises a main pipeline, a plurality of gas storage unit sets and a plurality of connecting pipeline assemblies. The main pipeline, the plurality of gas storage unit groups and the plurality of connecting pipeline assemblies are respectively prefabricated and formed into independent components. Wherein each air storage unit group comprises at least one air storage tank, the axis of the air storage tank extends in the horizontal direction, the diameter of the axis of the air storage tank is smaller than 3.5 m, and the pipelines connected with the pipeline assembly are detachably connected with the air storage tanks, so that the air storage tanks can be produced in a factory in a concentrated mode and transported to a site where the compressed air overground air storage device is installed. Therefore, the quality of the gas storage tank is conveniently controlled, the safety is improved, the labor cost caused by field welding and the time cost caused by preparation, construction and inspection are also reduced, and the problem of environmental pollution caused by field welding is also avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage and power generation, and in particular to a compressed air above-ground gas storage device. Background Art

[0002] Compressed air energy storage power generation technology uses compressed air energy storage technology (CAES) to store electricity during low periods and release it when needed, so as to achieve power generation and grid connection. It is a new energy power generation technology. The gas storage facilities of compressed air energy storage power stations are mainly of two types: aboveground and underground. Considering geographical factors, manufacturing costs, construction period and other aspects, aboveground gas storage is more advantageous. The aboveground compressed air storage composed of standard storage units has the advantages of flexible site selection, low cost, short construction period, and high safety and reliability.

[0003] At present, there is no successfully implemented standardized aboveground compressed air storage system in the world. The aboveground compressed air storage that has been implemented mostly uses on-site welding of pressure-bearing equipment. During the construction process such as pipeline assembly, this construction method has the following problems:

[0004] (1) On-site welding requires extremely high skill levels of welders, and the welding quality is greatly affected by environmental factors (such as temperature, humidity, wind speed, etc.), making it difficult to ensure that each weld can achieve the strength and sealing required by the design. Welding defects (such as cracks, slag inclusions, lack of fusion, etc.) may lead to the risk of leakage or even explosion during the use of the gas storage.

[0005] (2) On-site welding and assembly require a lot of time for preparation, construction and inspection, especially for the construction of large gas storage facilities. The long construction period will directly affect the overall progress and cost of the project. In addition, long construction time may also increase the impact on the surrounding environment.

[0006] (3) In addition to direct material and labor costs, on-site welding requires additional quality control, inspection, and repair costs. If the welding quality is not up to standard, rework is required, further increasing the overall cost.

[0007] (4) Long-term construction activities and welding operations may cause certain environmental pollution, such as noise, dust, and harmful gas emissions, which will have an adverse impact on surrounding residents and the ecological environment. Summary of the invention

[0008] The purpose of the present invention is to solve the problems of the existing above-ground compressed air storage system that the system needs to be welded and installed on site, resulting in difficulty in ensuring quality and high cost.

[0009] In order to solve the above-mentioned technical problems, the present invention provides a compressed air above-ground gas storage device, comprising a plurality of gas storage unit groups, a plurality of connecting pipe assemblies and a main pipeline, each of which is prefabricated as an independent component; each of the gas storage unit groups comprises at least one gas storage tank; the axis of the gas storage tank extends in the horizontal direction, and the diameter of the gas storage tank is less than 3.5 meters; the gas tanks are provided with air inlets and outlets; a plurality of the connecting pipe assemblies are arranged in a one-to-one correspondence with the plurality of the gas storage unit groups; each connecting pipe assembly comprises a pipeline and a shut-off valve, an air inlet interface and an air outlet interface are provided on the pipeline, the number of the air inlet interfaces of each connecting pipe assembly is adapted to the number of gas tanks of each of the gas storage unit groups, and the air inlet interface corresponds to the air inlet and outlet of the gas storage tank in a one-to-one manner and is detachably connected, and the shut-off valve is serially connected to the pipeline to control the on-off between the air inlet interface and the air outlet interface; the air outlet interfaces of the plurality of connecting pipe assemblies are all connected to the main pipeline, and the main pipeline is used to connect to an air compressor and a power generation device.

[0010] In some schemes of the present application, the pipeline includes a connecting main pipe and a connecting branch pipe, the connecting main pipe is provided with the air outlet interface, and the connecting main pipe is detachably connected to the main pipe through the air outlet interface; the number of the connecting branch pipes is equal to the number of gas storage tanks of the same gas storage unit group, one end of the connecting branch pipe is connected to the connecting main pipe, and the other end is provided with the air inlet interface, and the connecting branch pipe is detachably connected to the air inlet and outlet through the air inlet interface; the cut-off valve is arranged on the connecting main pipe or the connecting branch pipe.

[0011] In some embodiments of the present application, each of the connecting pipe assemblies further includes a temperature sensor, a pressure sensor and a safety relief valve, and the temperature sensor, the pressure sensor and the safety relief valve are all installed on the pipe between the cut-off valve and the air inlet and outlet.

[0012] In some solutions of the present application, the temperature sensor, the pressure sensor and the safety relief valve are integrated on the connecting main pipe.

[0013] In some schemes of the present application, the main line includes an air inlet end and an air outlet end, the air inlet end is connected to an air inlet control valve and an air compressor, and the air inlet control valve is arranged on a side of the air compressor close to the air outlet end; the air outlet end is connected to an air outlet control valve and a power generation device, and the air outlet control valve is arranged on a side of the power generation device close to the air inlet end; the air outlet interfaces of the plurality of connecting pipe assemblies can be detachably connected between the air inlet control valve and the air outlet control valve.

[0014] In some embodiments of the present application, the axial length of the gas storage tank is less than 25 meters.

[0015] In some solutions of the present application, a plurality of gas storage unit groups are arranged at intervals along the length direction of the main pipeline, and a plurality of gas outlet interfaces of the connecting pipe assemblies are arranged at intervals along the length direction of the main pipeline.

[0016] In some embodiments of the present application, each of the gas storage unit groups includes a plurality of separately arranged gas storage tanks, and the plurality of gas storage tanks are stacked vertically or arranged side by side horizontally.

[0017] In some embodiments of the present application, each of the gas storage unit groups includes a plurality of gas storage tank groups spaced apart in a horizontal direction, and each of the gas storage tank groups includes a plurality of separate gas storage tanks stacked vertically.

[0018] In some schemes of the present application, a sewage outlet is provided at the bottom of each of the gas storage tanks; the compressed air ground gas storage device also includes a sewage outlet pipe and a sewage outlet control valve, the sewage outlet pipe is detachably connected to the sewage outlet, and the sewage outlet pipe is arranged to be inclined downward at one end away from the sewage outlet; the sewage outlet control valve is connected to the sewage outlet pipe to control the on-off of the sewage outlet pipe.

[0019] It can be seen from the above technical solution that the beneficial effects of the present invention are:

[0020] The compressed air aboveground gas storage device of the present application includes a main pipeline, a plurality of gas storage unit groups and a plurality of connecting pipe assemblies; the main pipeline, the plurality of gas storage unit groups and the plurality of connecting pipe assemblies are prefabricated as independent components. Each gas storage unit group includes at least one gas storage tank, the axis of which extends in the horizontal direction and has a diameter less than 3.5 meters, and the pipes of the connecting pipe assembly and the gas storage tank are all detachably connected, so that the gas storage tanks can be concentrated in the factory for production and transported to the site where the compressed air aboveground gas storage device is installed, thereby facilitating the control of the quality of the gas storage tanks, improving safety, reducing the labor cost caused by on-site welding, and the time cost caused by preparation, construction and inspection, and avoiding the environmental pollution caused by on-site welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a compressed air above-ground gas storage device in one embodiment.

[0022] Figure 2 It is a schematic diagram of the connection structure between the gas storage unit group and the connecting pipe assembly in one embodiment.

[0023] Figure 3 It is a schematic diagram of the main structure of a plurality of gas storage tanks stacked vertically in one embodiment.

[0024] Figure 4 yes Figure 3 Schematic diagram of the right view structure.

[0025] Figure 5 It is a schematic diagram of the connection structure between the sewage pipe, the sewage control valve and the gas storage tank in one embodiment.

[0026] The reference numerals are as follows: 1-air storage unit group; 11-air storage tank; 111-air inlet and outlet; 112-sewage outlet; 12-lower supporting outer frame; 13-upper supporting outer frame; 2-connecting pipe assembly; 21-pipeline; 211-connecting main pipe; 2111-air outlet interface; 212-connecting branch pipe; 2121-air inlet interface; 22-cut-off valve; 23-temperature sensor; 24-pressure sensor; 25-safety relief valve; 3-main line; 4-air inlet control valve; 5-air compressor; 6-air outlet control valve; 7-power generation device; 81-sewage pipe; 811-sewage main pipe; 812-sewage branch pipe; 82-sewage control valve; 83-main sewage pipe. DETAILED DESCRIPTION

[0027] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0028] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] See also Figure 1 In view of the many problems existing in the existing ground compressed air storage that mostly uses on-site welded pressure-bearing equipment, the present application provides a compressed air ground gas storage device. The compressed air ground gas storage device includes a plurality of gas storage unit groups 1, a plurality of connecting pipe assemblies 2, and a main pipeline 3. The plurality of connecting pipe assemblies 2 are arranged one by one with the plurality of gas storage unit groups 1, and the gas storage tanks 11 of the gas storage unit groups 1 are connected to the main pipeline 3 through the connecting pipe assemblies 2.

[0031] The main pipeline 3 includes an air inlet end and an air outlet end. The air inlet end is connected to an air inlet control valve 4 and an air compressor 5. The air inlet control valve 4 is arranged on the side of the air compressor 5 close to the air outlet end. The air outlet end is connected to an air outlet control valve 6 and a power generation device 7. The air outlet control valve 6 is arranged on the side of the power generation device 7 close to the air inlet end. Multiple connecting pipe components 2 are connected between the air inlet control valve 4 and the air outlet control valve 6. The power generation device 7 includes a turbine and a generator. The turbine is connected to the main pipeline 3 so that the pressure gas in the main pipeline 3 can drive the impeller of the turbine to rotate, thereby outputting power. The rotating shaft of the generator is connected to the impeller rotating shaft of the turbine so that when the pressure gas drives the impeller of the turbine to rotate, the rotating shaft of the generator is driven to rotate, thereby realizing the power generation of the generator.

[0032] The air compressor 5 and the generator of the power generation device 7 are electrically connected to the power generation grid respectively. When the power generation grid is in a low power consumption period, the air outlet control valve 6 is controlled to be closed and the air inlet control valve 4 is opened, and the air compressor 5 uses the power of the power generation grid to work, so that the external air is compressed into the gas storage tank 11 of the multiple gas storage unit groups 1. When the power generation grid is in a peak power consumption period, the air inlet control valve 4 is controlled to be closed and the air outlet control valve 6 is controlled to be opened, so that the high-pressure gas in the gas storage tank 11 drives the power generation device 7 to work so that the power generation device 7 generates electricity, and the electricity generated by the power generation device 7 is incorporated into the power generation grid, avoiding insufficient power consumption during peak power consumption and waste of electricity during low power consumption.

[0033] The multiple gas storage unit groups 1, multiple connecting pipe assemblies 2 and main pipeline 3 of the present application are prefabricated as independent components, so that the volume of each independent component is small, so that each independent component can be produced in a factory and can be transported from the factory to the installation site, thereby reducing the labor cost caused by on-site welding and the time cost caused by preparation, construction and inspection, and avoiding environmental pollution problems caused by on-site welding.

[0034] See also Figure 2 and Figure 3 Each gas storage unit group 1 includes at least one gas storage tank 11. Specifically, each gas storage unit group 1 is provided with a plurality of separately arranged gas storage tanks 11, such as two, three, four or more gas storage tanks 11. The plurality of gas storage tanks 11 in each group are prefabricated as independent components. In other embodiments, each gas storage unit group 1 includes one gas storage tank 11.

[0035] The axis of each gas tank 11 extends in the horizontal direction, that is, the gas tank 11 is a horizontal tank body, and the diameter of the gas tank 11 is less than 3.5 meters, so that each gas tank 11 can be produced in a factory and can be transported from the factory to the installation site. For example, the diameter of the gas tank 11 can be 3 meters, or the diameter of the gas tank 11 is 1.5 meters. If the diameter of the gas tank 11 is greater than 3.5 meters, when the gas tank 11 needs to be transported, it is necessary to occupy the adjacent road, affecting traffic. Moreover, the width of the existing semi-trailer is usually less than 3 meters. When the diameter of the gas tank 11 is greater than 3.5 meters, it is inconvenient to fix the gas tank 11 on the semi-trailer for transportation. For example: when a semi-trailer with a width of 2.5 meters is used to transport a gas tank 11 with a diameter of 4 meters, the width of the gas tank 11 needs to greatly exceed the width of the semi-trailer on both sides, making it difficult for the semi-trailer to maintain balance during the transportation of the gas tank 11 and easily causing rollover. If a special transport vehicle is customized, the cost will increase significantly.

[0036] It should be noted that the width of existing semi-trailers is usually 2.5 meters, and some widened vehicles are 3.2 meters. Therefore, the diameter of the gas storage tank 11 is preferably less than 3 meters, for example, the diameter of the gas storage tank 11 is 3 meters, 2.5 meters or 1.5 meters, so that the gas storage tank 11 can be transported using an existing semi-trailer.

[0037] The length of existing semi-trailers is usually less than 17.5 meters. The axial length of the gas tank 11 of the present application is less than 25 meters, so that when the gas tank 11 is placed on the existing semi-trailer, the center of gravity of the gas tank 11 is located on the semi-trailer, thereby facilitating the maintenance of the stability of the vehicle and preventing the front of the vehicle from being lifted due to the center of gravity being too far back, thereby affecting transportation safety. In other words, the axial length of the gas tank 11 is set to be less than 25 meters, so that the existing semi-trailer can be used for transportation, and there is no need to customize a special transportation vehicle.

[0038] Preferably, the axial length of the gas tank 11 is 10 meters to 20 meters, so that when the gas tank 11 is placed on an existing semi-trailer, most of the volume of the gas tank 11 is located on the semi-trailer. For example, the axial length of the gas tank 11 is 14 meters, and a semi-trailer with a carriage length of 13 meters can be used for transportation, and when the gas tank 11 is placed on the semi-trailer, the tail of the gas tank 11 only exceeds the carriage by 1 meter, that is, most of the volume of the gas tank 11 is located on the carriage of the semi-trailer, and the center of gravity of the gas tank 11 is located on the carriage of the semi-trailer, so that the existing semi-trailer can safely transport the gas tank 11 of the present application, without the need to customize a dedicated transport vehicle, thereby reducing costs.

[0039] The gas tank 11 is manufactured in a factory and transported to the installation site for installation, so that it is easier to control the quality of the gas tank 11 during factory production, ensuring that each gas tank 11 can meet the strength and sealing requirements of the design, thereby avoiding the problem of quality assurance caused by environmental factors during on-site welding.

[0040] In one embodiment, multiple gas storage tanks 11 of the same gas storage unit group 1 are stacked vertically to reduce the floor space. Specifically, a lower support outer frame 12 is fixedly provided on the bottom surface of the gas storage tank 11, and the lower support outer frame 12 is used to support the gas storage tank 11 to maintain the stability of the gas storage tank 11, and also to ensure that there is a certain distance between the bottom of the gas storage tank 11 and the ground.

[0041] See also Figure 3 and Figure 4 The top surface of the gas storage tank 11 is also fixedly provided with an upper support outer frame 13, which is used to connect with the lower support outer frame 12 of the gas storage tank 11 located above it, so as to support the gas storage tank 11 above, so as to realize vertical stacking of multiple gas storage tanks 11. It should be noted that the upper support outer frame 13 and the lower support outer frame 12 can be formed into an integral structure with the gas storage tank 11 by welding in the factory. The gas storage tank 11 arranged at the top may not be provided with the upper support outer frame 13.

[0042] In one embodiment, a plurality of gas storage tanks 11 of the same gas storage unit group 1 are arranged side by side in the horizontal direction. It should be noted that, in this embodiment, each gas storage tank 11 is provided with a lower supporting outer frame 12, but an upper supporting outer frame 13 may not be provided.

[0043] In one embodiment, each gas storage unit group 1 includes a plurality of gas storage tank groups spaced apart in a horizontal direction, and each gas storage tank group includes a plurality of separate gas storage tanks 11 stacked vertically, thereby reducing the footprint of the gas storage unit group 1 and avoiding the stacked gas storage tanks 11 being too high to affect stability and inconvenience in maintenance.

[0044] In one embodiment, the number of gas storage tanks 11 of the multiple gas storage unit groups 1 may be different. The arrangement of the gas storage tanks 11 of the multiple gas storage unit groups 1 may also be different.

[0045] Each gas storage tank 11 is provided with a gas inlet and outlet 111. Figure 3 In the illustrated embodiment, the air inlet and outlet 111 is disposed at one axial end of the air storage tank 11. In other embodiments, the air inlet and outlet 111 may also be disposed at the top of the air storage tank 11.

[0046] Each gas tank 11 is provided with a drain port 112 at the bottom thereof, and the drain port 112 is arranged at the lowest point of the gas tank 11, so that the sewage formed by the condensation of water vapor in the air in the gas tank 11 can be discharged from the drain port 112. The arrangement of the lower support outer frame 12 enables the drain port 112 to be located at the lowest point of the gas tank 11 without affecting the discharge of sewage from the drain port 112. An exhaust port is also arranged at the top of each gas tank 11, and when the gas tank 11 is maintained, all the pressurized gas in the gas tank 11 can be discharged through the exhaust port.

[0047] See also Figure 1 and Figure 2 Each connecting pipe assembly 2 includes a pipe 21 and a shut-off valve 22. The pipe 21 is provided with an air inlet interface 2121 and an air outlet interface 2111. The number of air inlet interfaces 2121 of each connecting pipe assembly 2 matches the number of air storage tanks 11 of each air storage unit group 1, and the air inlet interfaces 2121 correspond to the air inlet and outlet ports 111 of the air storage tanks 11 one by one and are detachably connected. The shut-off valve 22 is connected in series to the pipe 21 to control the on-off between the air inlet interface 2121 and the air outlet interface 2111. In this way, the gas storage tank 11 of each gas storage unit group 1 can be controlled by the corresponding cut-off valve 22 of the connecting pipe assembly 2, so that when the power grid is at a peak of power consumption, in addition to controlling the air inlet control valve 4 to close and the air outlet control valve 6 to open, some cut-off valves 22 are controlled to open according to the air pressure requirements, so that the high-pressure gas in the gas storage tank 11 drives the power generation device 7 to work to realize the power generation device 7 to generate electricity, and the air flow entering the power generation device 7 can be controlled to be stable, so that the power generation device 7 is located in the optimal working efficiency area, thereby improving the energy conversion efficiency. In other words, the number of cut-off valves 22 that are controlled to be opened can be set according to the demand for pressurized gas.

[0048] For example, the gas storage unit group 1 is provided with four groups, namely the first gas storage unit group, the second gas storage unit group, the third gas storage unit group and the fourth gas storage unit group. When the power generation device 7 needs to work, the shut-off valve 22 corresponding to the first gas storage unit group is opened, so that the pressure gas in the gas tank 11 of the first gas storage unit group drives the power generation device 7 to work. When the pressure of the pressure gas in the gas tank 11 of the first gas storage unit group is lower than the set value, it is switched to the pressure gas in the gas tank 11 of the second gas storage unit group to drive the power generation device 7 to work, and so on, until the pressure gas in the gas tank 11 of all gas storage unit groups 1 is lower than the set value. Then the shut-off valves 22 of multiple gas storage unit groups 1 are controlled to open, so that the pressure gas in the gas tank 11 of multiple gas storage unit groups 1 drives the power generation device 7 to work, thereby ensuring that the output gas pressure is stable while making full use of the gas in each gas tank 11. When the power grid is at a low power consumption, the outlet control valve 6 is controlled to be closed, and the inlet control valve 4 and the shut-off valve 22 are controlled to be opened, and the air compressor 5 uses the excess power of the power grid to work, so that the external air is compressed into the gas tanks 11 of the multiple gas storage unit groups 1. It should be noted that when the gas tanks 11 of the gas storage unit group 1 are supplemented with pressurized gas, the shut-off valve 22 corresponding to the gas tank 11 in the gas-filled state may not be opened, so that only the gas tank 11 that needs to be supplemented is supplemented with gas.

[0049] The pipeline 21 includes a connecting main pipe 211 and a connecting branch pipe 212. The connecting main pipe 211 is provided with an air outlet interface 2111. The connecting main pipe 211 is provided with a first connecting flange at the air outlet interface 2111. The connecting main pipe 211 is detachably connected to the main pipe 3 through the first connecting flange at the air outlet interface 2111, so that the connection between the connecting pipe assembly 2 and the main pipe 3 is convenient. The number of connecting branch pipes 212 is equal to the number of gas storage tanks 11 of the same gas storage unit group 1. One end of the connecting branch pipe 212 is connected to the connecting main pipe 211, and the other end is provided with an air inlet interface 2121. The connecting branch pipe 212 is provided with a second connecting flange at the air inlet interface 2121, and the connecting branch pipe 212 is detachably connected to the air inlet and outlet 111 of the gas storage tank 11 through the second connecting flange at the air inlet interface 2121. Such a configuration makes the connection between the connecting pipe assembly 2 and the gas storage tank 11 and the main pipe 3 more convenient. It should be noted that the connection pipe assembly 2 and the gas storage tank 11 and the main pipe 3 may also be threadedly connected.

[0050] The connecting main pipe 211 and the connecting branch pipe 212 may be welded together or integrally formed, so that the connecting main pipe 211 and the connecting branch pipe 212 are prefabricated as independent components.

[0051] The diameter of the pipeline 21 is smaller than the diameter of the main pipeline 3, so that the flow rate of the pressure gas in the pipeline 21 is smaller than the flow rate of the pressure gas in the main pipeline 3, so that the flow rate of the pressure gas in the main pipeline 3 can be controlled by controlling the number of open cut-off valves 22. For example, when the cut-off valve 22 on one connecting pipeline assembly 2 is in an open state, the flow rate through the main pipeline 3 is 0.1m / s-10m / s; when the cut-off valves 22 on five connecting pipeline assemblies 2 are in an open state, the flow rate through the main pipeline 3 is 0.5m / s-50m / s. Thus, by controlling each cut-off valve 22, the power generation of the power generation device 7 is controlled.

[0052] exist Figure 1 and Figure 2 In the illustrated embodiment, the cut-off valve 22 is disposed on the connecting main pipe 211, so that one cut-off valve 22 can control the connection and disconnection between the multiple gas storage tanks 11 of the same gas storage unit group 1 and the main pipe 3, thereby reducing the use of valve components and reducing costs. It should be noted that a cut-off valve 22 may also be disposed on each connecting branch pipe 212, so that each gas storage tank 11 controls the connection and disconnection between itself and the main pipe 3 through the corresponding cut-off valve 22.

[0053] Each connecting pipe assembly 2 also includes a temperature sensor 23, a pressure sensor 24 and a safety relief valve 25. The temperature sensor 23, the pressure sensor 24 and the safety relief valve 25 are all installed on the pipe 21 between the cut-off valve 22 and the gas inlet and outlet 111, so that the temperature sensor 23 can detect the gas temperature of the gas storage tank 11 in real time, the pressure sensor 24 can detect the gas pressure of the gas storage tank 11 in real time, and the safety relief valve 25 can keep the gas pressure of the gas storage tank 11 within a safe range.

[0054] The temperature sensor 23, the pressure sensor 24 and the safety relief valve 25 are integrated on the connecting main pipe 211, so that the gas flowing from the main pipe 3 to the gas storage tank 11 and the gas flowing from the gas storage tank 11 to the main pipe 3 need to pass through the temperature sensor 23, the pressure sensor 24 and the safety relief valve 25, thereby improving the accuracy of the data detected by the temperature sensor 23 and the pressure sensor 24. It should be noted that since the multiple gas storage tanks 11 and the multiple connecting branches 212 of the same gas storage unit group 1 are in a connected state, the temperature sensor 23, the pressure sensor 24 and the safety relief valve 25 can also be set on one of the connecting branches 212.

[0055] Among them, each connecting pipe assembly 2 is prefabricated as an independent component, and each gas tank 11 is also prefabricated as an independent component, so that the air tightness of the connecting pipe assembly 2 and the gas tank 11 can be tested in the production workshop, so that after on-site installation, it is only necessary to test the sealing of the connection positions between the connecting main pipe 211 and the main line 3 and between the connecting branch pipe 212 and the gas tank 11, thereby reducing the labor intensity during on-site installation.

[0056] The plurality of gas storage unit groups 1 are arranged at intervals along the length direction of the main pipeline 3, and the plurality of gas outlet interfaces 2111 of the connecting pipeline components 2 are arranged at intervals along the length direction of the main pipeline 3. Figure 2 In the illustrated embodiment, the connecting main pipe 211 is arranged horizontally and perpendicular to the main pipe 3, so that one end of the connecting main pipe 211 away from the main pipe 3 extends toward one side of the gas storage unit group 1, and the connecting branch pipe 212 is connected between the connecting main pipe 211 and the gas storage tank 11. Such an arrangement shortens the length of the connecting main pipe 211, thereby shortening the length of each connecting pipe assembly 2.

[0057] In one embodiment, the main pipe 3 is arranged in sections along its length direction, that is, the main pipe 3 includes a plurality of main pipe sections arranged in sequence along its length direction, and the plurality of main pipe sections are connected in series to form a pipeline that can be connected to all the connecting pipe assemblies 2. The interface of the main pipe 3 for connecting with the pipeline 21 can be arranged between the plurality of adjacent main pipe sections, so that the arrangement of the pipeline 21 interface of the main pipe 3 is reduced, thereby reducing the labor intensity of the workers during installation.

[0058] The compressed air above-ground gas storage device also includes a sewage pipe 81 and a sewage control valve 82. The sewage pipe 81 is detachably connected to the sewage outlet 112, and the end of the sewage pipe 81 away from the sewage outlet 112 is tilted downward; the sewage control valve 82 is connected to the sewage pipe 81 to control the on-off of the sewage pipe 81. When the sewage control valve 82 is controlled to open, the liquid in the gas storage tank 11 can be smoothly discharged from the sewage pipe 81 to a set location, such as extending the end of the sewage pipe 81 away from the gas storage tank 11 to the drain ditch, so that the sewage is naturally discharged into the drain ditch. After the sewage control valve 82 is closed, the compressed air can be stored inside the gas storage tank 11.

[0059] Preferably, the inclination angle of the drain pipe 81 is 1-10 degrees, preferably 2 degrees, so that the liquid in the gas tank 11 can be naturally discharged through the drain pipe 81, and the space required for the drain pipe 81 in the height direction can be reduced, thereby reducing the height of the lower support outer frame 12. The inclination angle of the drain pipe 81 can be set according to the actual installation environment.

[0060] See also Figure 5In one embodiment, a plurality of sewage pipes 81 are provided, and the plurality of sewage pipes 81 are provided in one-to-one correspondence with the plurality of gas storage unit groups 1. The sewage pipe 81 includes a sewage main pipe 811 and a sewage branch pipe 812. The number of sewage branch pipes 812 is equal to the number of gas storage tanks 11 of the corresponding gas storage unit group 1. The sewage branch pipes 812 correspond to and are connected to the gas storage tanks 11 one by one. The ends of the sewage branch pipes 812 away from the gas storage tanks 11 are connected to the sewage main pipe 811. The sewage main pipe 811 extends to a set sewage discharge location, so that the sewage in the gas storage tank 11 is gathered in the sewage main pipe 811 through the sewage branch pipe 812 and discharged to the set sewage discharge location. The sewage control valve 82 is integrated with the sewage main pipe 811, so that one sewage control valve 82 can control the discharge of sewage in all gas storage tanks 11 of the same gas storage unit group 1, reducing the number of sewage control valves 82 used, thereby reducing costs.

[0061] In this embodiment, the ends of the sewage main pipe 811 and the sewage branch pipe 812 away from the sewage outlet 112 are both tilted downward, so that after the sewage control valve 82 is opened, the sewage in the gas storage tank 11 can be discharged in sequence through the sewage branch pipe 812 and the sewage main pipe 811. The sewage main pipe 811, the sewage branch pipe 812 and the sewage control valve 82 are integrated into an independent component, which reduces the difficulty of on-site installation.

[0062] See also Figure 2 In one embodiment, the number of the sewage pipes 81 is equal to the number of the gas storage tanks 11, and the sewage pipes 81 are arranged one by one with the gas storage tanks 11. The sewage pipes 81 are detachably connected to the sewage outlet 112, and one end of the sewage pipe 81 away from the sewage outlet 112 is arranged to be tilted downward; the sewage control valve 82 is connected to the sewage pipe 81 to control the on-off of the sewage pipe 81. In this embodiment, each sewage control valve 82 independently controls the sewage discharge of a single gas storage tank 11 connected thereto.

[0063] In one embodiment, the compressed air above-ground gas storage device further includes a main drain pipe 83, and one end of all drain pipes 81 away from the gas storage tank 11 is detachably connected to the main drain pipe 83, so that the liquid in all gas storage tanks 11 passes through the drain pipes 81 and converges in the main drain pipe 83 and is discharged centrally. The inclination angle of the main drain pipe 83 is also set to 1-10 degrees, so that the liquid can be discharged naturally.

[0064] Preferably, the drain pipe 81 and the gas tank 11, and the drain pipe 81 and the main drain pipe 83 are connected by flanges, making the connection more convenient. It should be noted that the drain pipe 81 and the gas tank 11, and the drain pipe 81 and the main drain pipe 83 can also be threaded.

[0065] The compressed air aboveground gas storage device of the present application includes a main pipeline 3, a plurality of gas storage unit groups 1 and a plurality of connecting pipe assemblies 2; the main pipeline 3, the plurality of gas storage unit groups 1 and the plurality of connecting pipe assemblies 2 are prefabricated as independent components. Each gas storage unit group 1 includes at least one gas storage tank 11, the axis of the gas storage tank 11 extends in the horizontal direction, and the diameter is less than 3.5 meters, and the pipe 21 of the connecting pipe assembly 2 and the gas storage tank 11 are both detachably connected, so that the gas storage tank 11 can be concentrated in the factory production and transported to the site where the compressed air aboveground gas storage device is installed by transportation equipment, so as to facilitate the control of the quality of the gas storage tank 11, improve safety, reduce the labor cost caused by on-site welding and the time cost caused by preparation, construction and inspection, and avoid the environmental pollution caused by on-site welding.

[0066] Moreover, when it is necessary to adapt to different gas storage requirements, the total gas storage amount of the compressed air ground gas storage device can be adjusted by adjusting the number of gas storage unit groups 1, without the need to set up another set of compressed air ground gas storage device, thereby reducing costs and improving the applicability of the compressed air ground gas storage device.

[0067] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A compressed air ground storage device, characterized in that: It includes a plurality of gas storage unit groups, a plurality of connecting pipe assemblies and a main pipe, each of which is prefabricated into an independent component; Each of the gas storage unit groups includes at least one gas storage tank; the axis of the gas storage tank extends in the horizontal direction, and the diameter of the gas storage tank is less than 3.5 meters; the gas storage tank is provided with an air inlet and an air outlet; A plurality of the connecting pipe assemblies are arranged in one-to-one correspondence with a plurality of the gas storage unit groups; each connecting pipe assembly comprises a pipe and a shut-off valve, an air inlet interface and an air outlet interface are arranged on the pipe, the number of the air inlet interfaces of each connecting pipe assembly matches the number of the gas storage tanks of each gas storage unit group, and the air inlet interfaces correspond to the air inlet and outlet of the gas storage tank in one-to-one correspondence and are detachably connected, and the shut-off valve is serially connected to the pipe to control the on-off between the air inlet interface and the air outlet interface; The air outlet interfaces of the plurality of connecting pipe assemblies are all connected to the main pipe, and the main pipe is used to be connected to an air compressor and a power generation device.

2. The compressed air above-ground gas storage device according to claim 1 is characterized in that: The pipeline comprises a connecting main pipe and a connecting branch pipe, the connecting main pipe is provided with the gas outlet interface, and the connecting main pipe is detachably connected to the main pipe through the gas outlet interface; The number of the connecting branch pipes is equal to the number of gas storage tanks in the same gas storage unit group, one end of the connecting branch pipe is connected to the connecting main pipe, and the other end is provided with the air inlet interface, and the connecting branch pipe is detachably connected to the air inlet and outlet through the air inlet interface; The cut-off valve is arranged on the connecting main pipe or the connecting branch pipe.

3. The compressed air ground storage device according to claim 2 is characterized in that: Each of the connecting pipe components further includes a temperature sensor, a pressure sensor and a safety relief valve, and the temperature sensor, the pressure sensor and the safety relief valve are all installed on the pipe between the cut-off valve and the air inlet and outlet.

4. The compressed air above-ground gas storage device according to claim 3 is characterized in that: The temperature sensor, the pressure sensor and the safety relief valve are integrated on the connecting main pipe.

5. The compressed air above-ground gas storage device according to claim 1, characterized in that: The main pipeline includes an air inlet end and an air outlet end, the air inlet end is connected to an air inlet control valve and an air compressor, and the air inlet control valve is arranged on a side of the air compressor close to the air outlet end; the air outlet end is connected to an air outlet control valve and a power generation device, and the air outlet control valve is arranged on a side of the power generation device close to the air inlet end; The gas outlet interfaces of the plurality of connecting pipe assemblies can be detachably connected between the gas inlet control valve and the gas outlet control valve.

6. The compressed air above-ground gas storage device according to claim 1, characterized in that: The axial length of the gas storage tank is less than 25 meters.

7. The compressed air above-ground gas storage device according to claim 1, characterized in that: The plurality of gas storage unit groups are arranged at intervals along the length direction of the main pipeline, and the plurality of gas outlet interfaces of the connecting pipe assemblies are arranged at intervals along the length direction of the main pipeline.

8. The compressed air above-ground gas storage device according to claim 7, characterized in that: Each of the gas storage unit groups includes a plurality of separately arranged gas storage tanks, and the plurality of gas storage tanks are stacked vertically or arranged side by side horizontally.

9. The compressed air above-ground gas storage device according to claim 7, characterized in that: Each of the gas storage unit groups includes a plurality of gas storage tank groups arranged at intervals in the horizontal direction, and each of the gas storage tank groups includes a plurality of separate gas storage tanks arranged in a vertical stack.

10. The compressed air above-ground gas storage device according to claim 1, characterized in that: Each of the gas storage tanks is provided with a sewage outlet at the bottom; The compressed air above-ground gas storage device also includes a sewage pipe and a sewage control valve. The sewage pipe is detachably connected to the sewage outlet, and one end of the sewage pipe away from the sewage outlet is arranged to be inclined downward; the sewage control valve is connected to the sewage pipe to control the opening and closing of the sewage pipe.

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