Marine hydrogen storage equipment

Abstract

A hydrogen storage tank can float on the sea through a platform, the hydrogen storage equipment comprises a tank body, a first energy dissipation structure and a second energy dissipation structure, the periphery of the tank body is sleeved with the first energy dissipation structure, the first energy dissipation structure is rotationally connected with the tank body, and the first energy dissipation structure is used for counteracting energy of fluid; the second energy dissipation structure extends in the axial direction of the tank body and is provided with energy dissipation holes, the second energy dissipation structure is arranged on the outer side of the first energy dissipation structure, and the second energy dissipation structure is used for dispersing concentrated fluid; according to the invention, the problem of layout and site selection caused by topographic factors is eliminated, the cost is reduced, and the maintenance and replacement are more convenient; influence of incoming flow on the hydrogen storage tank body is very small, and damage and impact of the environment on the hydrogen storage tank body are greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage tanks, and particularly to a hydrogen storage device for marine use. Background Art

[0002] Under the background of the global "dual carbon" goal, the transformation of the energy structure towards green and low-carbon is an inevitable trend. As a clean and efficient secondary energy source, hydrogen energy is an important path for the transformation of high-energy-consuming and high-emission sectors towards green and low-carbon. Marine wind power resources are abundant, and when integrated with hydrogen production, it is expected to become an important model for the long-term sustainable development of the marine wind power industry, truly achieving the ultimate goal of zero carbon emissions. Marine wind power has the advantages of rich wind energy resources, high power generation utilization hours, and suitability for large-scale development. However, the problem of the accommodation of marine wind power poses challenges to its development. Combining marine wind power with hydrogen production can achieve the local accommodation of marine wind power and solve the problem of difficult grid connection and accommodation.

[0003] To address the issue of accommodating the surplus electrical energy of marine wind power, using this electrical energy for hydrogen production is a highly feasible measure. However, the marine environment is complex and changeable, and the impact force of waves, winds, and currents at sea poses a huge test to the structural strength of marine hydrogen storage facilities. The hydrogen storage tank body and the support structure need to have sufficient anti-impact ability to ensure the safety of hydrogen storage in the tank.

[0004] Burying hydrogen storage tanks under the seabed to store hydrogen produced from marine wind power is a currently widely used technical solution. For example, a subsea hydrogen energy storage device in Patent CN221977983U includes a base, and a hydrogen storage tank, a hydrogen fuel cell module, a hydrogen compressor module, an electrolytic cell module, and a control module located on the base; the fuel part of the hydrogen fuel cell module is connected to the hydrogen storage tank by a pipeline; the circuit part of the hydrogen fuel cell module is connected to the control module by a cable; the gas path part of the hydrogen compressor module is respectively connected to the hydrogen storage tank and the electrolytic cell module by pipelines; the circuit part of the hydrogen compressor module is connected to the control module by a cable; a number of anodic protection blocks are evenly distributed on the surface of the hydrogen storage tank and maintain electrical continuity with the hydrogen storage tank body.

[0005] However, there are still many disadvantages at present. The undersea environment is complex, with high pressure and strong corrosiveness, requiring special design and manufacture of hydrogen storage tanks that can withstand high pressure and corrosion resistance. This places high demands on materials and manufacturing processes, increasing the technical difficulty and cost. During the manufacturing process, it is necessary to ensure the sealing performance and structural strength of the tank body, and the technical requirements far exceed those of ordinary hydrogen storage tanks. Burying the hydrogen storage tank on the seabed requires special installation equipment and technology, and the installation process is complex and risky. Carrying out equipment maintenance and repair on the seabed also faces many difficulties, such as the need for professional diving operation equipment and personnel, and the maintenance cost is high. Moreover, there are limitations in geological conditions and site selection. Burying requires choosing suitable geological conditions, such as stable seabed strata, to prevent the tank body from being damaged or displaced due to geological activities. In addition, although the hydrogen storage tank has strict sealing requirements in design, in the complex undersea environment, there is still a risk of hydrogen leakage due to reasons such as tank body aging and external force damage. Once leakage occurs, the diffusion of hydrogen in seawater is complex, making it difficult to accurately monitor and control, which may lead to safety accidents. In addition, the undersea hydrogen storage tank needs to be connected to the sea surface platform through pipelines, and this section of the suspended pipeline is vulnerable to seawater erosion and vortex-induced vibration damage. Summary of the Invention

[0006] The purpose of the invention is to provide a hydrogen storage device for use at sea, which solves the problem of complex undersea conditions and great damage to hydrogen storage tanks.

[0007] The present invention is realized as follows: A hydrogen storage device for use at sea, wherein the hydrogen storage tank can float on the sea through a platform.

[0008] The hydrogen storage device includes a tank body, a first energy dissipation structure, and a second energy dissipation structure.

[0009] The first energy dissipation structure is sleeved on the outer periphery of the tank body and is rotatably connected to the tank body for offsetting the energy of the fluid.

[0010] The second energy dissipation structure extends along the axial direction of the tank body and is provided with energy dissipation holes. The second energy dissipation structure is disposed outside the first energy dissipation structure, and the second energy dissipation structure is used for dispersing the concentrated fluid.

[0011] The present invention floats the hydrogen storage device on the sea through a platform. On the one hand, it eliminates the problem of layout and site selection brought by terrain factors, and the hydrogen storage device can be directly arranged on the wind power platform, which also reduces the survey cost related to terrain monitoring in the early stage of layout. On the other hand, since the hydrogen storage tank buried on the seabed has a relatively high construction cost and is basically a semi-permanent project, it is difficult to repair and replace once problems occur. The present invention is for hydrogen storage at sea, and it is more convenient for maintenance and replacement. Since the hydrogen storage tank is arranged at the platform position, relatively speaking, there is no need to consider the protection work of the gas transmission pipeline.

[0012] However, considering the complex environment of sea waves, winds and currents in hydrogen storage equipment, the impact of fluid exists for a long time. The safety protection of hydrogen storage tanks under the coupling of multiple environments is also a relatively big problem. In the present invention, a first energy dissipation structure that can rotate along the tank body is connected to each hydrogen storage tank, and a circular track is provided on the corresponding first energy dissipation structure to realize the rotation of the first energy dissipation structure when it is impacted by fluid. Under the oncoming flow conditions such as sea waves / strong winds / strong currents, the first energy dissipation structure rotates to reduce the energy of the oncoming flow. Moreover, a second energy dissipation structure is also provided on the tank body. The second energy dissipation structure extends and is fixed along the axial direction of the tank body. Through the energy dissipation holes on the second energy dissipation structure, the concentrated fluid can be divided and dispersed, and the energy is greatly reduced. After passing through the internally provided rotatable first energy dissipation structure, the impact of the oncoming flow on the hydrogen storage tank body is very small, greatly reducing the damage and impact of the environment on the hydrogen storage tank.

[0013] A further technical solution of the present invention is that fixed ring sleeves are sleeved at both ends of the tank body, and the second energy dissipation structure is arranged between the fixed ring sleeves at both ends through connecting pieces.

[0014] The second energy dissipation structure is connected to the fixed ring sleeve through a connecting piece, so as to realize the installation of the second energy dissipation structure and the tank body, disperse the impact received by the outer periphery of the tank, and has strong stability and easy installation.

[0015] A further technical solution of the present invention is that the fixed ring sleeve is fixed to the platform through a fixed connecting block.

[0016] The connection is more stable and has stronger reliability.

[0017] A further technical solution of the present invention is that the fixed ring sleeve is detachable.

[0018] It is convenient for the installation, replacement or maintenance of the second energy dissipation structure.

[0019] A further technical solution of the present invention is that the second energy dissipation structure includes an energy dissipation plate, and the energy dissipation holes are opened on the energy dissipation plate.

[0020] A number of energy dissipation circular holes are opened on the energy dissipation plate. Such an arrangement can divide and disperse the concentrated fluid, greatly reduce the energy, and after passing through the internally provided rotatable energy dissipation fan blades, the impact of the oncoming flow on the hydrogen storage tank body is very small.

[0021] A further technical solution of the present invention is that the energy dissipation plate is arc-shaped and coaxial with the tank body.

[0022] The arc-shaped structure has stronger wrapping property with the outer periphery of the tank body, and the second energy dissipation structure is coaxial with the tank body to ensure the energy dissipation effect on the tank body.

[0023] A further technical solution of the present invention is that the second energy dissipation structure is arranged on both sides of the tank body.

[0024] It can effectively disperse the oncoming flow.

[0025] A further technical solution of the present invention is that the first energy dissipation structure includes an energy dissipation ring and energy dissipation fan blades arranged circumferentially along the energy dissipation ring.

[0026] The impact of the oncoming flow on the energy dissipation fan blades causes the energy dissipation ring to rotate, reducing the impact of the oncoming flow on the tank body.

[0027] A further technical solution of the present invention is that the energy dissipation fan blades are arranged at an angle axially with respect to the energy dissipation ring.

[0028] A further technical solution of the present invention is that a plurality of the first energy dissipation structures are provided axially along the tank body.

[0029] The energy dissipation effect is better, and the volume of a single first energy dissipation structure is small, which is convenient for transportation and installation.

[0030] A further technical solution of the present invention is that air holes for connecting with an air pipe are provided at both ends of the tank body, and the air holes are threadedly connected to the air pipe.

[0031] For a hydrogen storage tank, both the inlet and the outlet are processed with threads, and the inlet air pipe and the outlet air pipe are connected to the tank body through threads, greatly reducing the problem of gas leakage.

[0032] The beneficial effects of the present invention: A hydrogen storage device that can be installed on a floating offshore wind power platform solves a series of problems brought by undersea hydrogen storage. On the one hand, it eliminates the problem of layout and site selection caused by terrain factors, and the hydrogen storage device can be directly arranged on the wind power platform, which also reduces the exploration cost related to terrain monitoring in the early stage of layout. On the other hand, the hydrogen storage tanks laid on the seabed are basically a semi-permanent project due to the relatively high construction cost, and it is difficult to repair and replace them once problems occur. The present invention is for offshore hydrogen storage, and it is more convenient for repair and replacement. Since the hydrogen storage tanks are arranged at the platform location, relatively speaking, there is no need to consider the protection work of the gas transmission pipeline.

[0033] The cost of the present invention is relatively low. The undersea environment is complex, with high pressure and strong corrosiveness, and special design and manufacturing of hydrogen storage tanks that can withstand high pressure and corrosion resistance are required, resulting in a relatively high construction cost. In addition, suitable geological conditions, such as stable seabed formations, need to be selected for burial, so the preliminary geological exploration is essential. The present invention can also save this part of the cost.

[0034] It is easy to install, and there are many choices for the layout area. The device can be arranged on the platform or at the bottom of the platform (immersed in the ocean), and it does not need to carry out excavation construction like undersea hydrogen storage tanks. The present invention can complete the fixation of a hydrogen storage tank only by relying on bolts.

[0035] It has strong anti-wave and anti-wind ability. Since it is buried in the seabed, the seabed hydrogen storage tank does not need to consider the scouring effect of ocean currents on the tank body. However, the inlet and outlet pipelines are suspended across the marine environment. Due to the certain distance of the pipelines, they are greatly affected by the marine environment. In the present invention, the hydrogen storage tank is directly arranged on the platform, and energy dissipation arc-shaped plates are respectively arranged in two horizontal directions of the device and fixedly connected to the hydrogen storage tank to disperse the oncoming flow energy. This is the first layer of external protection of the device. After passing through such an opening arc-shaped plate, the oncoming flow energy distribution has been discretized in the area, and the impact of the oncoming flow on the tank body is greatly weakened. Such a setting protects the internal hydrogen storage tank from the strong impact of external fluids. A rotatable energy dissipation fan blade is connected to each hydrogen storage tank to achieve rotational energy dissipation of the oncoming flow. After the fluid passes through the arc-shaped energy dissipation plate, it still has a certain amount of energy. To reduce the force on the surface of the hydrogen storage tank and prevent damage or displacement of the tank body, energy dissipation fan blades rotating along a circular track are arranged, which greatly eliminates the oncoming flow energy and impact. The energy is dissipated through the energy dissipation arc-shaped plate and the rotatable energy dissipation fan blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a three-dimensional view of a hydrogen storage device for marine use provided by the present invention;

[0037] Figure 2 is a side view of a hydrogen storage device for marine use provided by the present invention;

[0038] Figure 3 is a top view of a hydrogen storage device for marine use provided by the present invention;

[0039] Figure 4 is a schematic diagram of the installation structure of the second energy dissipation structure provided by the present invention.

[0040] Reference numerals: 1. Tank body, 21. Energy dissipation plate, 22. Energy dissipation hole, 3. Fixed ring sleeve, 4. Connecting piece, 5. Fixed connection block, 31. Energy dissipation ring, 32. Energy dissipation fan blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0042] Example 1:

[0043] Figures 1-4 A hydrogen storage device for marine use is shown, and the hydrogen storage device is installed on a floating platform.

[0044] The hydrogen storage device includes a tank body 1, a first energy dissipation structure, and a second energy dissipation structure.

[0045] The first energy dissipation structure is sleeved on the outer periphery of the tank body 1 and is rotatably connected to the tank body 1 for offsetting the energy of the fluid.

[0046] The second energy dissipation structure extends along the axial direction of the tank body 1 and is provided with energy dissipation holes 22. The second energy dissipation structure is disposed outside the first energy dissipation structure, and the second energy dissipation structure is used for dispersing the concentrated fluid.

[0047] In the present invention, the hydrogen storage device floats on the sea through a platform. On the one hand, it eliminates the problem of layout and site selection caused by terrain factors, and the hydrogen storage device can be directly arranged on the wind power platform, which also reduces the exploration cost related to terrain monitoring in the early stage of layout. On the other hand, the hydrogen storage tank arranged at the bottom of the sea has a relatively high construction cost and is basically a semi-permanent project. Once a problem occurs, it is difficult to repair and replace. The present invention is for offshore hydrogen storage, and it is more convenient for repair and replacement. Since the hydrogen storage tank is arranged at the platform position, relatively speaking, there is no need to consider the protection work of the gas transmission pipeline.

[0048] However, considering the complex environment of sea waves, wind, and currents for the hydrogen storage device, the impact of the fluid exists for a long time. The safety protection of the hydrogen storage tank under the coupling of multiple environments is also a relatively large problem. In the present invention, a first energy dissipation structure that can rotate along the tank body is connected to each hydrogen storage tank. There is a circular track on the corresponding first energy dissipation structure to realize the rotation of the first energy dissipation structure when it is impacted by the fluid. Under the oncoming flow conditions such as sea waves / strong winds / strong currents, the first energy dissipation structure rotates to reduce the energy of the oncoming flow. Moreover, a second energy dissipation structure is also provided on the tank body. The second energy dissipation structure extends and is fixed along the axial direction of the tank body. Through the energy dissipation holes on the second energy dissipation structure, the concentrated fluid can be divided and dispersed, and the energy is greatly reduced. After passing through the internally provided rotatable first energy dissipation structure, the influence of the oncoming flow on the hydrogen storage tank body is very small, which greatly reduces the damage and impact of the environment on the hydrogen storage tank.

[0049] In this embodiment, fixed ring sleeves 3 are sleeved at both ends of the tank body 1, and the second energy dissipation structure is arranged between the fixed ring sleeves 3 at both ends through a connecting member 4.

[0050] The second energy dissipation structure is connected to the fixed ring sleeve through a connecting member, thereby realizing the installation of the second energy dissipation structure and the tank body, dispersing the impact on the outer periphery of the tank, having strong stability and being easy to install.

[0051] In this embodiment, connecting rods 4 are provided on the inner sides at both ends of the energy dissipation plate 21, and the connecting rods 4 are fixedly connected to the fixed ring sleeve 3, thereby realizing the connection between the energy dissipation plate 21 and the tank body 1.

[0052] In this embodiment, one end of the energy dissipation plate 21 is connected to the fixed ring sleeve 3 through a connecting rod 4, which has good stability, and the connecting rods 4 are arranged at intervals.

[0053] In this embodiment, the fixing ring sleeve 3 is fixed to the platform via a fixing connection block 5 .

[0054] The connection is more stable and more reliable.

[0055] In this embodiment, the fixed connection block 5 is in the shape of a Chinese character "丄", and a threaded hole is provided on the fixed connection block 5. The fixed connection block 5 is fixedly connected to the platform through the threaded hole, thereby achieving the fixation of the tank body and the platform.

[0056] In this embodiment, the fixing ring sleeve 3 is detachable.

[0057] It is convenient to install, replace or repair the second energy dissipation structure.

[0058] In this embodiment, one end of the fixing ring sleeve 3 is open, and a protrusion is provided at the opening, and fasteners can pass through between the protrusions to achieve fixation.

[0059] In this embodiment, considering the form of a floating offshore wind power platform, the platform is relatively low from the sea level. In strong waves and strong winds, the hydrogen storage tank is inevitably impacted by fluid. There are two fixed connection blocks 5 at the bottom of the hydrogen storage device, which are threaded and have two threaded holes on each side. They are fixed to the platform by hexagonal bolts, and can also be arranged at the bottom of the platform in the seawater. Two fixed ring sleeves 3 are connected to the upper part of the fixed connection block 5, which are fixedly connected to the upper hydrogen storage tank by bolts.

[0060] In this embodiment, the second energy dissipation structure includes an energy dissipation plate 21 , and the energy dissipation holes 22 are opened on the energy dissipation plate 21 .

[0061] A number of circular energy dissipation holes are provided on the energy dissipation plate. This arrangement can divide and disperse the concentrated fluid, greatly reducing the energy, and then passing through the internal rotatable energy dissipation blades, the impact on the flow of the hydrogen storage tank is very small.

[0062] In this embodiment, arc-shaped energy dissipation plates 21 are respectively arranged on both sides of the device, and the two ends are fixedly connected by four connecting rods 4, and a plurality of circular energy dissipation holes 22 are provided on the energy dissipation plates 21. Such an arrangement can divide and disperse the concentrated fluid, greatly reduce the energy, and then pass through the internal rotatable energy dissipation blades 32, the impact on the flow of the hydrogen storage tank is very small.

[0063] In this embodiment, the energy dissipation plate 21 is arc-shaped and coaxial with the tank body 1 .

[0064] The arc-shaped structure has a stronger wrapping effect on the outer periphery of the tank body, and the second energy dissipation structure is coaxial with the tank body, ensuring the energy dissipation effect on the tank body.

[0065] In this embodiment, the second energy dissipation structure is disposed on both sides of the tank body 1.

[0066] It can effectively disperse the oncoming flow.

[0067] In this embodiment, the first energy dissipation structure includes an energy dissipation ring 31 and energy dissipation fan blades 32 arranged circumferentially along the energy dissipation ring 31.

[0068] The impact of the oncoming flow on the energy dissipation fan blades causes the energy dissipation ring to rotate, reducing the impact of the oncoming flow on the tank body.

[0069] In this embodiment, the energy dissipation fan blades 32 are arranged at an angle axially with respect to the energy dissipation ring 31. The energy dissipation fan blades 32 are inclined, increasing the contact area with the oncoming flow and eliminating the influence of the oncoming flow on the tank body 1 to a greater extent.

[0070] In this embodiment, on each hydrogen storage tank, there are 5 energy dissipation fan blades 32 that can rotate along the tank body, and there are circular tracks on the corresponding energy dissipation ring 31 to enable the rotation of the energy dissipation fan blades 32 when they are impacted by the fluid. Under oncoming flow conditions such as waves / strong winds / strong currents, the energy dissipation fan blades 32 rotate to reduce the energy of the oncoming flow.

[0071] In this embodiment, a plurality of the first energy dissipation structures are provided axially along the tank body 1.

[0072] The energy dissipation effect is better, and the volume of a single first energy dissipation structure is small, which is convenient for transportation and installation.

[0073] In this embodiment, air holes for connecting with air pipes are provided at both ends of the tank body 1, and the air holes are threadedly connected to the air pipes.

[0074] For the hydrogen storage tank, the inlet and outlet are both processed with threads, and the inlet air pipe and the outlet air pipe are connected to the tank body through threads, greatly reducing the problem of gas leakage.

[0075] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydrogen storage device for use at sea, characterized in that: The hydrogen storage device is installed on a floating platform. The hydrogen storage device includes a tank body (1), a first energy dissipation structure, and a second energy dissipation structure. The first energy dissipation structure is sleeved on the outer periphery of the tank body (1) and is rotatably connected to the tank body (1) for offsetting the energy of the fluid. The second energy dissipation structure extends along the axial direction of the tank body (1) and is provided with energy dissipation holes (22). The second energy dissipation structure is placed outside the first energy dissipation structure, and the second energy dissipation structure is used for dispersing the concentrated fluid.

2. The hydrogen storage device for offshore use according to claim 1, characterized in that: Detachable fixing ring sleeves (3) are sleeved at both ends of the tank body (1), and the second energy dissipation structure is arranged between the fixing ring sleeves (3) at both ends through connecting pieces (4).

3. The hydrogen storage device for marine use according to claim 2, characterized in that: The fixing ring sleeve (3) is fixed to the platform through a fixing connection block (5).

4. A hydrogen storage device for marine use according to any one of claims 1-3, characterized in that: The second energy dissipation structure includes an energy dissipation plate (21), and the energy dissipation holes (22) are formed in the energy dissipation plate (21).

5. The hydrogen storage device for marine use according to claim 4, characterized in that: The energy dissipation plate (21) is arc-shaped and coaxial with the tank body (1).

6. A hydrogen storage device for marine use according to any one of claims 1-3, characterized in that: The second energy dissipation structure is placed on both sides of the tank body (1).

7. A hydrogen storage device for marine use according to any one of claims 1-3, characterized in that: The first energy dissipation structure includes an energy dissipation ring (31) and energy dissipation fan blades (32) arranged circumferentially along the energy dissipation ring (31).

8. The hydrogen storage device for marine use according to claim 7, wherein: The energy dissipation fan blades (32) are arranged at an angle with the axial direction of the energy dissipation ring (31).

9. A hydrogen storage device for marine use according to any one of claims 1-3, characterized in that: A plurality of the first energy dissipation structures are arranged along the axial direction of the tank body (1).

10. A hydrogen storage device for marine use according to any one of claims 1 - 3, characterized in that: Air holes for connecting with an air pipe are provided at both ends of the tank body (1), and the air holes are threadedly connected to the air pipe.

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