A large hydrogen balloon tank

Abstract

The application discloses the technical field of hydrogen energy storage and relates to a large low-pressure hydrogen spherical tank, which comprises a temperature detection device, a pressure detection device, an import and export emergency cut-off valve, a tank top sampling and replacement system, a tank top center manhole, a safety valve, a positive pressure relief system, an integrally cast nozzle and a tank bottom sampling and replacement system. The new type can realize pressure test, tank cleaning, gas replacement and light and heavy component sampling during the whole life cycle of the construction and operation of the large hydrogen spherical tank, and realizes the hydrogen spherical tank cleaning and replacement process without dead points while ensuring that the number of tank openings is small and the opening scheme is safe.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen energy storage technology for petrochemical enterprises, and specifically relates to a large hydrogen balloon tank. Background Technology

[0002] With the rapid development of green hydrogen production technology from wind and solar power, my country's green hydrogen industry has gradually matured. Large-scale hydrogen storage and transportation has become a key factor restricting hydrogen production. Currently, the main gaseous hydrogen storage technologies include high-pressure cylinder storage, container storage, and spherical tank storage. Among these, spherical tanks are used for large-scale hydrogen storage, with a single spherical tank capable of holding up to 10,000 m³ of water. 3 The above methods enable the large-scale manufacturing of single spherical tanks, representing a large-scale hydrogen storage method that is space-saving, highly safe, and technologically mature.

[0003] Currently, the domestic processes for large hydrogen balloon tanks all refer to the storage processes of general liquid hydrocarbon balloon tanks. They do not take into account the characteristics of hydrogen, such as its extremely low density, easy leakage, the need for regular sampling and analysis during storage, and the prevention of oxygen contamination during water electrolysis. Furthermore, the pressure testing, replacement, and tank cleaning processes for large hydrogen balloon tanks are difficult, and they cannot well meet the needs of safe storage, pressure testing, tank cleaning, gas replacement, sampling of light and heavy components, and active venting throughout the entire life cycle of large hydrogen balloon tank construction and operation.

[0004] Chinese patent CN202510392520.X discloses a small high-pressure hydrogen spherical tank. This tank includes a tank body, hydrogen inlet and outlet nozzles, a manhole, a discharge nozzle, an internal discharge pipe, and a pipe support. Combined with an external piping system, it effectively utilizes the density difference between various media during start-up and shutdown to purge and replace the internal media of the hydrogen storage tank during these phases. The opening of this invention is located at the top of the tank, with the nozzle extending into the tank interior. Water pressure testing and drainage are achieved through nitrogen pressurization and frequent replacement. However, this technical solution is only suitable for high-pressure hydrogen storage tanks with small physical volumes. When used for large hydrogen storage tanks, the nitrogen pressurization method for drainage at the top opening is extremely inefficient and wasteful. Furthermore, due to the low density of hydrogen, it tends to accumulate at the top of the tank, making efficient hydrogen venting and replacement impossible with this patented opening design. Utility Model Content

[0005] The purpose of this utility model is to provide a large hydrogen balloon tank that enables safe storage, pressure testing, hydrogen balloon tank cleaning, gas replacement, sampling of light and heavy components, and active release throughout the entire life cycle of the construction and operation of the large hydrogen balloon tank. It solves the technical problems of existing large hydrogen storage tanks, such as difficulties in pressure testing, replacement, and tank cleaning, as well as the incomplete use of light and heavy components and active release functions.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A large hydrogen balloon tank includes a temperature detection device, a pressure detection device, an inlet / outlet emergency shut-off valve, a top sampling and replacement device, a central manhole at the top, a safety valve, an active pressure relief device, an integrally cast nozzle, and a bottom sampling and replacement device. The tank is characterized in that: the inlet / outlet emergency shut-off valve is installed at the top of the large hydrogen balloon tank; the central manhole at the top is installed at the very top of the large hydrogen balloon tank; the temperature and pressure detection devices are directly installed on the top opening nozzle of the large hydrogen balloon tank; the top sampling and replacement device is installed on the top opening nozzle of the central manhole at the top; the safety valve and the active pressure relief device are installed side-by-side at the top of the large hydrogen balloon tank; the integrally cast nozzle is installed at the very bottom of the large hydrogen balloon tank, extending beyond the projected area of ​​the large hydrogen balloon tank; and the bottom sampling and replacement device is connected to the integrally cast nozzle and installed outside the projected area of ​​the large hydrogen balloon tank.

[0008] The present invention relates to a large hydrogen balloon tank, which is further characterized in that: the large hydrogen balloon tank is made of 10 to 80 pieces of balloon skin welded together, and is used only for storing hydrogen. The physical volume of the hydrogen balloon tank is greater than 100 m3, and the design pressure does not exceed 8.0 MPaG.

[0009] The present invention relates to a large hydrogen balloon tank, which is further characterized in that: the sampling and replacement device on the top of the tank is led out from the high point of the central manhole on the top of the tank, which is located at the very top of the central axis of the hydrogen balloon tank, and can realize the venting of all hydrogen gas in the hydrogen balloon tank without any dead spots.

[0010] This utility model discloses a large hydrogen balloon tank, further characterized in that: the tank top sampling and replacement device consists of a tank top sampling and venting interface, a tank top replacement valve one, a tank top sampling interface, and a tank top replacement valve two, which are sequentially connected to the top opening nozzle of the central manhole on the tank top via pipes and flanges, serving both hydrogen replacement and hydrogen collection functions. The tank top replacement valve one and the tank top replacement valve are closed during tank operation; they are opened at the end of hydrogen purging during tank maintenance, ensuring rapid and complete venting of hydrogen from the large hydrogen balloon tank and improving hydrogen purging efficiency. The tank top sampling and venting interface and the tank top sampling interface are connected to the inlet and vent of external sampling facilities, achieving closed-loop hydrogen sampling and sample venting.

[0011] This utility model discloses a large hydrogen balloon tank, further characterized in that: the tank bottom sampling and replacement device comprises a sampling and condensate drain interface, a tank bottom replacement interface, a tank bottom vent valve, a tank bottom sampling and vent interface, and a main valve for the tank bottom replacement and condensate drain sampling interface. It is connected to the integrally cast nozzle at the lowest part of the large hydrogen balloon tank via pipes and flanges, and has the functions of tank drainage, nitrogen replacement, and heavy component sampling. The tank bottom replacement and condensate drain sampling interface and the tank bottom vent valve are closed when the large hydrogen balloon tank is operating; they are opened during the hydrogen-nitrogen replacement process in the commissioning phase of the large hydrogen balloon tank to improve replacement efficiency. The sampling and condensate drain interface is closed when the large hydrogen balloon tank is operating, and opened during drainage to improve drainage efficiency. The sampling and condensate drain interface and the tank bottom sampling and vent interface are connected to the inlet and vent of an external sampling facility to achieve closed-loop sampling and sample venting of heavy components in hydrogen.

[0012] This utility model discloses a large hydrogen balloon tank, further characterized in that: the integrally cast nozzle extends from the bottom of the central axis of the large hydrogen balloon tank, as an integrally cast nozzle, gradually extending beyond the projected area of ​​the balloon tank; the length L of the integrally cast nozzle is greater than the radius of the large hydrogen balloon tank. Except for the welded connection and reinforcement between the nozzle and the tank body, there are no welding points or flange connection points within the projected area of ​​the balloon tank.

[0013] The present invention relates to a large hydrogen balloon tank, which is further characterized in that: the pressure detection device includes a pressure sensor and a transmitter, which can detect the pressure signal of the large hydrogen balloon tank and transmit it to the local or factory monitoring and control system, and issue an alarm signal when the pressure of the large hydrogen balloon tank reaches a set high limit or a set low limit.

[0014] The present invention relates to a large hydrogen balloon tank, which is further characterized in that: the temperature detection device includes a temperature sensor and a transmitter, which can detect the temperature signal of the large hydrogen balloon tank and transmit it to the local or factory monitoring and control system, and issue an alarm signal when the temperature of the large hydrogen balloon tank reaches the set high limit.

[0015] The inlet and outlet emergency shut-off valve can receive signals from local or factory monitoring and control systems and shut off in an emergency when the pressure of the large hydrogen balloon tank reaches the set high-high limit or the set low-low limit.

[0016] When the pressure in the large hydrogen balloon tank reaches the design pressure, the hydrogen gas is released through the safety valve at the top of the large hydrogen balloon tank into the venting system.

[0017] This utility model discloses a large hydrogen balloon tank, further characterized in that: the active pressure relief device includes a remote control valve, a flow-limiting orifice plate, an active pressure relief device manual valve one, and an active pressure relief device manual valve two, which are connected sequentially via pipes and flanges and installed on the opening nozzle at the top of the large hydrogen balloon tank. The remote control valve can be remotely opened and closed, and transmits the opening and closing status to the local or factory monitoring and control system; the flow-limiting orifice plate is used to limit the active pressure relief flow value from exceeding the maximum flow corresponding to the safety valve; the active pressure relief device manual valve one and active pressure relief device manual valve two, located before and after the remote control valve and the flow-limiting orifice plate, are used for the isolation and maintenance of the active pressure relief device.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By setting up a tank top sampling and replacement device consisting of a tank top sampling and venting interface, a tank top replacement valve one, a tank top sampling interface, and a tank top replacement valve two, and a tank bottom sampling and replacement device consisting of a sampling and condensate draining interface, a tank bottom replacement interface, a tank bottom venting valve, a tank bottom sampling and venting interface, and a main valve for the tank bottom replacement and condensate draining sampling interface, it is possible to realize the pressure test, tank cleaning, gas replacement, and light and heavy component sampling required throughout the entire life cycle of the construction and operation of large hydrogen balloon tanks. While ensuring a small number of tank openings and a safe opening scheme, it achieves a dead spot-free cleaning and replacement process for large hydrogen balloon tanks.

[0020] 2. The hydrogen inlet / outlet, venting outlet, pressure detection, and temperature detection devices of the large hydrogen balloon tank are all located at the top of the large hydrogen balloon tank. The integrally cast nozzle at the bottom of the hydrogen balloon tank extends beyond the projected area of ​​the tank through an integrally cast nozzle. There are no flange connection points within the projected area of ​​the top of the large hydrogen balloon tank, which can fundamentally prevent hydrogen from leaking from the connection points at the bottom of the hydrogen balloon tank, thereby preventing accidents such as jet fires and scorching of the tank wall, and achieving safe storage.

[0021] 3. By installing pressure detection devices, temperature detection devices, inlet and outlet emergency shut-off valves, and safety valves, key parameters of large hydrogen balloon tanks can be monitored, alarmed, and interlocked for protection, thus ensuring safe storage.

[0022] 4. By setting up an active venting device consisting of active venting device manual valve one, flow limiting orifice plate, remote control valve, and active venting device manual valve two, it is possible to remotely control the active release and depressurization of hydrogen in large hydrogen balloon tanks. Attached Figure Description

[0023] Appendix Figure 1 This is a schematic diagram of the structure of a large hydrogen storage spherical tank according to the present invention.

[0024] The attached diagram is labeled as follows: 1-Large hydrogen balloon tank, 2-Temperature detection device, 3-Pressure detection device, 4-Inlet / outlet emergency shut-off valve, 5-Top sampling and venting interface, 6-Top replacement valve one, 7-Top sampling interface, 8-Top replacement valve two, 9-Top center manhole, 10-Safety valve, 11-Active venting device manual valve one, 12-Flow limiting orifice plate, 13-Remote control valve, 14-Active venting device manual valve two, 15-Integral cast nozzle, 16-Sampling and condensate drain interface, 17-Bottom replacement interface, 18-Bottom venting valve, 19-Bottom sampling and venting interface, 20-Bottom replacement and condensate draining sampling interface main valve. Detailed Implementation

[0025] The implementation of the technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0026] like Figure 1 The large hydrogen storage spherical tank shown includes a large hydrogen spherical tank 1, a temperature detection device 2, a pressure detection device 3, an inlet and outlet emergency shut-off valve 4, a top sampling and venting interface 5, a top replacement valve 6, a top sampling interface 7, a second top replacement valve 8, a top center manhole 9, a safety valve 10, an active venting device manual valve 11, a flow limiting orifice plate 12, a remote control valve 13, an active venting device manual valve 14, an integrally cast nozzle 15, a sampling and condensate draining interface 16, a bottom replacement interface 17, a bottom venting valve 18, a bottom sampling and venting interface 19, and a bottom replacement, condensate draining, and sampling interface main valve 20.

[0027] The temperature detection device 2 and pressure detection device 3 are directly installed on the nozzle at the top of the large hydrogen balloon tank 1, and the connection method is welding or flange connection.

[0028] The inlet / outlet emergency shut-off valve 4 can be directly installed on the top inlet / outlet nozzle of the large hydrogen balloon tank 1, or it can be connected to the top inlet / outlet nozzle of the large hydrogen balloon tank 1 via a pipeline, and the connection method is welding or flange connection.

[0029] The central manhole 9 on the top of the tank is installed at the very top of the large hydrogen balloon tank 1 and is connected by welding. The central manhole 9 on the top of the tank includes a manhole cover and a manhole seat. A nozzle is welded on the manhole cover. After the manhole cover is opened, the central manhole 9 on the top of the tank can be used as a maintenance passage for the large hydrogen balloon tank 1.

[0030] The top sampling and venting interface 5, top displacement valve 6, top sampling interface 7, and top displacement valve 8 are installed on the top of the large hydrogen balloon tank 1 and are interconnected by pipes to form a top sampling and displacement device. Top displacement valve 8 can be directly installed on the nozzle of the central manhole 9 on the top of the tank, or it can be connected to the nozzle on the central manhole 9 via a pipe using a flange connection. The other side of top displacement valve 8 is connected to the inlet of top displacement valve 6 via a pipe. A tee is provided on the pipe between top displacement valve 6 and top displacement valve 8, and the tee is connected to the top sampling interface 7. The outlet of top displacement valve 6 is connected to an external venting system via a pipe, and a tee is provided on the pipe on the outlet side of top displacement valve 6, and the tee is connected to the top sampling and venting interface 5. The connection method is either flange connection or welding.

[0031] The safety valve 10 is installed on the top of the large hydrogen balloon tank 1 and is connected to the venting nozzle on the top of the large hydrogen balloon tank 1 through a pipe and valve. The connection method is a flange connection.

[0032] The active venting device, consisting of manual valve 14 (secondary), remote control valve 13, flow-limiting orifice plate 12, and manual valve 11 (first), is sequentially connected via pipelines to form an active venting device. This device is installed in parallel with safety valve 10 at the top of the large hydrogen balloon tank 1. Manual valve 14 (secondary) is installed at the beginning, connecting to the tee between safety valve 10 and the vent nozzle at the top of the large hydrogen balloon tank 1. Remote control valve 13 and flow-limiting orifice plate 12 are installed in the middle, and manual valve 11 (first) is installed at the end. The outlet of manual valve 11 (first) is connected to an external venting system via a pipeline. The connection method is a flange connection.

[0033] The integrally cast nozzle 15 is installed at the bottom of the large hydrogen balloon tank 1 and welded to the large hydrogen balloon tank 1. The length L of the integrally cast nozzle 15 is greater than the radius of the large hydrogen balloon tank 1, ensuring that the integrally cast nozzle 15 extends beyond the projection range of the large hydrogen balloon tank.

[0034] The main valve 20 for bottom displacement and condensate drainage sampling, the sampling and condensate drainage port 16, the bottom displacement port 17, the bottom vent valve 18, and the bottom sampling and venting port 19 are installed at the bottom of the large hydrogen balloon tank 1 and are interconnected by pipelines to form a bottom sampling and displacement device. The main valve 20 can be directly installed on the integral cast nozzle 15 or connected to the integral cast nozzle 15 via a pipeline using a flange connection. The other side of the main valve 20 is connected to the inlet of the bottom vent valve 18 via a pipeline. A tee is provided on the pipeline between the main valve 20 and the bottom vent valve 18, and the tee is connected to the bottom displacement port 17. The outlet of the bottom vent valve 18 is connected to an external venting system via a pipeline, and a tee is provided on the pipeline on the outlet side of the bottom vent valve 18, and the tee is connected to the bottom sampling and venting port 19. The connection method is either flange connection or welding.

[0035] For those skilled in the art, various other corresponding changes and modifications can be made based on the above technical solutions and processes, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A large hydrogen balloon tank, comprising a temperature detection device, a pressure detection device, inlet and outlet emergency shut-off valves, a tank top sampling and replacement device, a tank top center manhole, a safety valve, an active pressure relief device, an integrally cast nozzle, and a tank bottom sampling and replacement device; characterized in that: The inlet and outlet emergency shut-off valves are installed on the top of the large hydrogen balloon tank. The central manhole on the top of the tank is installed at the very top of the large hydrogen balloon tank. The temperature detection device and pressure detection device are directly installed on the top opening nozzle of the large hydrogen balloon tank. The top sampling and replacement device is installed on the top opening nozzle of the central manhole on the top of the tank. The safety valve and active pressure relief device are installed side by side on the top of the large hydrogen balloon tank. The integrally cast nozzle is installed at the very bottom of the large hydrogen balloon tank, extending beyond the projected range of the large hydrogen balloon tank. The bottom sampling and replacement device is connected to the integrally cast nozzle and installed outside the projected range of the large hydrogen balloon tank.

2. The large hydrogen balloon tank according to claim 1, characterized in that: The large hydrogen balloon canister is made by welding 10-80 balloon skins together.

3. The large hydrogen balloon tank according to claim 1, characterized in that: The tank top sampling and replacement device consists of a tank top sampling venting interface, a tank top replacement valve one, a tank top sampling interface, and a tank top replacement valve two, which are connected in sequence to the top opening nozzle of the central manhole on the tank top through pipes and flanges.

4. The large hydrogen balloon tank according to claim 3, characterized in that: The tank top replacement valve is closed when the storage tank is in operation; it is opened at the end of the hydrogen purging stage during the storage tank maintenance phase; the tank top sampling venting interface and the tank top sampling interface are connected to the inlet and vent of the external sampling facility.

5. The large hydrogen balloon tank according to claim 1, characterized in that: The tank bottom sampling and replacement device consists of a sampling and condensate draining interface, a tank bottom replacement interface, a tank bottom vent valve, a tank bottom sampling and venting interface, and a main valve for the tank bottom replacement and condensate draining sampling interface. It is connected to the integral cast nozzle through pipes and flanges.

6. The large hydrogen balloon tank according to claim 5, characterized in that: The tank bottom replacement condensate drainage sampling interface and the tank bottom vent valve are closed when the storage tank is working, and open during the hydrogen replacement of nitrogen in the storage tank commissioning phase; the sampling and condensate drainage interface is closed when the storage tank is working, and opens during drainage for efficient drainage of the storage tank; the sampling and condensate drainage interface and the tank bottom sampling vent interface are connected to the inlet and vent of the external sampling facility.

7. The large hydrogen balloon tank according to claim 1, characterized in that: The integrally cast nozzle is located at the bottom of the central axis of the hydrogen balloon tank, and the length L of the integrally cast nozzle is greater than the radius of the large hydrogen balloon tank.

8. The large hydrogen balloon tank according to claim 1, characterized in that: The pressure detection device includes a pressure sensor and a transmitter.

9. The large hydrogen balloon tank according to claim 1, characterized in that: The temperature detection device includes a temperature sensor and a transmitter.

10. The large hydrogen balloon tank according to claim 1, characterized in that: The active pressure relief device includes a remote control valve, a flow-limiting orifice plate, and a manual valve, which are sequentially connected and installed on the opening nozzle at the top of the large hydrogen balloon tank via pipes and flanges.

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