An assembled metal hydride hydrogen storage device

Abstract

The application provides an assembled metal hydride hydrogen storage device, which comprises an alloy powder bearing module and a hydrogen storage tank; a plurality of alloy powder bearing modules are stacked in the hydrogen storage tank; the alloy powder bearing module comprises a breather pipe, a heating ring and a support plate; the breather pipe is installed at the center of the support plate, the heating ring is fixedly connected with the support plate, contact rings are arranged at the two ends of the breather pipe, guide bars are connected with the contact rings, the guide bars are arranged in the pipe wall of the breather pipe and the inside of the support plate, and the heating ring is connected with the guide bars. The heat exchange efficiency is improved by using the heat exchange box and the radiating fins, the heat exchange bottleneck problem existing in other hydrogen storage devices to a certain extent is solved, and the hydrogen absorption and release rate of the reaction container is greatly improved; in addition, the radiating fins can support and separate the hydrogen storage alloy powder in the reaction container, and the hydrogen storage alloy powder is prevented from gathering at the bottom of the hydrogen storage tank after being pulverized during hydrogen charging and discharging.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen storage tanks, and particularly relates to an assembled metal hydride hydrogen storage device. BACKGROUND

[0002] Hydrogen energy has become an important part of China's energy development due to its abundant natural reserves, cleanliness, high calorific value and good recyclability. As the main carrier of hydrogen energy, the production, storage, transportation and application technology and equipment of hydrogen gas are the key to promoting the development of hydrogen energy industry. However, the efficient storage of hydrogen gas has been limited by the physical and chemical characteristics of low density and high activity of hydrogen gas, and it is difficult to achieve. At present, there are three ways of hydrogen storage, namely high-pressure gaseous storage, liquid storage and solid storage. Among them, the high-pressure gaseous hydrogen storage technology and equipment are relatively mature and are widely used in industrial systems. In recent years, the super-high pressure hydrogen storage method greatly expands the application scenarios of hydrogen energy due to its convenient and efficient storage characteristics. However, the high-pressure storage method is still limited by the safety of the storage equipment and the energy consumption cost of pressure increase. The hydrogen storage density of liquid hydrogen is relatively ideal, and the application of liquid hydrogen in the field of propeller fuel is relatively mature, but in the application scenarios of chemical industry field, it is not only limited by the energy loss generated by hydrogen liquefaction / gasification, but also has high requirements for liquid hydrogen storage equipment and control system. Traditional solid-state hydrogen storage refers to the method of using solid-state compounds to react with hydrogen to form hydrides to shorten the distance between hydrogen molecules / atoms and thus improve the hydrogen storage density. However, the solid-state hydrogen storage material is generally heavy, and heat effect will be generated during the absorption / desorption of hydrogen, and heat control becomes the main factor limiting its large-scale application. SUMMARY

[0003] In view of the above problems, the application provides an assembled metal hydride hydrogen storage device.

[0004] In order to achieve the above purpose, the application adopts the following technical scheme:

[0005] An assembled metal hydride hydrogen storage device, comprising an alloy powder bearing module and a hydrogen storage tank.

[0006] A plurality of alloy powder bearing modules are stacked in the hydrogen storage tank.

[0007] The alloy powder bearing module comprises a breather pipe, a heating ring and a support plate.

[0008] The breather pipe is installed at the center of the support plate.

[0009] The heating ring is fixedly connected with the support plate.

[0010] The breather pipe is provided with a contact ring at both ends.

[0011] The contact ring is connected with a guide bar, and the guide bar is arranged in the pipe wall of the breather pipe and the inside of the support plate.

[0012] The heating ring is connected with the guide bar.

[0013] Preferably, the hydrogen storage device further comprises a heat exchange box body.

[0014] The hydrogen storage tank is located inside the heat exchange box body.

[0015] The heat exchange box body is provided with a cooling medium inlet and a cooling medium outlet.

[0016] Preferably, the alloy powder bearing module further comprises a cooling fin.

[0017] The cooling fin is in sliding fit with the inner wall of the hydrogen storage tank.

[0018] Preferably, the support plate is a conical structure, and the air pipe is installed at the center of the conical structure.

[0019] The cooling fin and the heating ring are both installed on the surface of the conical structure and are both arranged concentrically with the air pipe.

[0020] The air pipe, the cooling fin, the heating ring and the support plate form a bearing cavity, and the bearing cavity is filled with hydrogen storage alloy powder.

[0021] Preferably, the inner wall of the hydrogen storage tank is fixedly connected with a bearing clamping groove, and the bearing clamping groove is used for supporting the alloy powder bearing module arranged in a stack.

[0022] Preferably, the hydrogen storage tank is further provided with a pressure gauge, and the instrument panel of the pressure gauge is located outside the heat exchange box body.

[0023] Preferably, the hydrogen storage tank is further provided with an auxiliary air pipe, and the auxiliary air pipe is communicated with a plurality of auxiliary branch pipes, and the auxiliary branch pipes are used for ventilating the air pipe.

[0024] Preferably, the auxiliary air pipe is communicated with an air inlet pipe, and the air inlet pipe extends to the outside of the heat exchange box body.

[0025] Preferably, the air inlet pipe is communicated with an air outlet pipe, and the air outlet pipe is located outside the heat exchange box body.

[0026] Preferably, an air inlet stop valve is installed on the air inlet pipe, and an air outlet stop valve is arranged on the air outlet pipe.

[0027] Preferably, a groove is formed at one end of the air pipe, and a protruding ring is arranged at the other end, and the contact ring is respectively installed at the bottom of the groove and the surface of the protruding ring.

[0028] The beneficial effects of the present application are as follows:

[0029] 1. The application can realize heat exchange from the inside and outside of the hydrogen storage tank at the same time by using the heat exchange box and the heat dissipation fin, improve the heat exchange efficiency, solve the heat exchange bottleneck problem existing in other hydrogen storage devices to a certain extent, and greatly improve the hydrogen absorption and release rate of the reaction container; in addition, the heat dissipation fin can also support and separate the hydrogen storage alloy powder in the reaction container, avoiding the hydrogen storage alloy powder from gathering at the bottom of the hydrogen storage tank after being pulverized during hydrogen charging and discharging.

[0030] 2. The application uses stacked alloy powder bearing modules, which can be assembled in the hydrogen storage tank according to the requirements during use, facilitating installation and disassembly, facilitating recycling of hydrogen storage alloy powder, improving the recycling rate of system cost, improving the economy of the hydrogen storage system, realizing large-scale adjustment of the filling density of hydrogen storage alloy powder, improving the application range of the system, and also prolonging the service life of the equipment and ensuring safety.

[0031] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure indicated in the specification and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0033] Figure 1 A structural schematic diagram of an assembled metal hydride hydrogen storage device of the present application is shown;

[0034] Figure 2 A structural schematic diagram of an alloy powder bearing module of the present application is shown;

[0035] Figure 3 An embodiment structure diagram of the alloy bearing module of the present application is shown;

[0036] Figure 4 A bottom structure diagram of Figure 3 is shown;

[0037] Figure 5 An internal structure diagram of Figure 3 is shown.

[0038] In the figure: 1. Inlet pipe; 2. Inlet stop valve; 3. Auxiliary air pipe; 301. Auxiliary branch pipe; 4. Alloy powder carrying module; 41. Ventilation pipe; 42. Heat sink; 43. Heating ring; 44. Support plate; 45. Groove; 46. Raised ring; 47. Guide bar; 48. Contact ring; 5. Hydrogen storage alloy powder; 6. Cooling medium inlet; 7. Load-bearing slot; 8. Heat exchange box; 9. Cooling medium outlet; 10. Hydrogen storage tank; 11. Pressure gauge; 12. Exhaust stop valve; 13. Exhaust pipe. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] An assembled metal hydride hydrogen storage device, such as Figure 1 As shown, it includes an alloy powder carrying module 4, a heat exchange box 8 and a hydrogen storage tank 10; wherein, the hydrogen storage tank 10 is located inside the heat exchange box 8, and a cooling medium inlet 6 and a cooling medium outlet 9 are opened on the surface of the heat exchange box 8, and several alloy powder carrying modules 4 are stacked in the hydrogen storage tank 10.

[0041] It should be noted that in Figure 1 The cooling medium enters the heat exchange box 8 through the cooling medium inlet 6 and is discharged through the cooling medium outlet 9 to achieve heat exchange with the hydrogen storage tank 10. Of course, the functions of the cooling medium inlet 6 and the cooling medium outlet 9 can be interchanged.

[0042] It should be further explained that the shape of the heat exchange box 8 is not fixed. Figure 1 The figure shows a plan view of the structure. In the actual selection process, a cylindrical or cubic structure can be used, and the design can be flexibly adjusted according to the needs of the scene. The hydrogen storage tank 10 includes an upper tank body and a lower tank body, which are welded or connected by bolts. When welding is used, the hydrogen storage tank 10 is welded with a stainless steel column and a head, such as 304 stainless steel, which can withstand high pressure. In addition, the hydrogen storage tank 10 is a hollow structure with no gas pipelines and heat exchange pipelines inside. It is similar to a traditional high-pressure hydrogen tank, with low production cost, high pressure resistance, and good safety, avoiding the risk of complex internal pipelines and multiple leakage points under high pressure. The connection of the vent pipe 41 in the middle forms a connected complete cavity, which is convenient for the rapid entry and exit of hydrogen.

[0043] Further, if Figure 2As shown, the alloy powder carrying module 4 comprises a vent pipe 41, a heat sink 42, a heating ring 43 and a support plate 44; wherein the heat sink 42 is in sliding fit with the inner wall of the hydrogen storage tank 10, specifically in clearance fit, so that the heat sink 42 can slide along the inner wall of the hydrogen storage tank 10; in addition, the support plate 44 is a conical structure, the vent pipe 41 is installed at the center of the conical structure; the heat sink 42 and the heating ring 43 are both installed on the surface of the conical structure and are arranged concentrically with the vent pipe 41; in addition, the vent pipe 41, the heat sink 42, the heating ring 43 and the support plate 44 constitute a carrying cavity, and the carrying cavity is filled with hydrogen storage alloy powder 5.

[0044] In addition, the heating ring 43 is fixedly connected with the support plate 44, and the vent pipe 41 is provided with a contact ring 48 at both end faces; the contact ring 48 is connected with a lead strip 47, the lead strip 47 is arranged inside the vent pipe 41 and the support plate 44, and the heating ring 43 is connected with the lead strip 47.

[0045] It should be noted that the installation mode of the contact ring 48 is as shown in Figure 3 As shown, the vent pipe 41 is provided with a groove 45 at one end, and a protruding ring 46 at the other end, and the contact ring 48 is installed at the bottom of the groove 45 and the surface of the protruding ring 46 respectively.

[0046] As shown in Figure 5 The groove 45 bottom can install the contact ring 48, then the contact ring 48 connects several lead strips 47 (can use copper strip), the lead strip 47 can be arranged along the axial direction of the vent pipe 41, and is uniformly arranged along the circumferential direction of the vent pipe 41, then enters the inside of the support plate 44, and finally connects the heating ring 43, as shown in Figure 4 The vent pipe 41 is provided with a protruding ring 46 at the bottom, and the contact ring 48 is arranged on the surface of the protruding ring 46, when the two alloy powder carrying modules 4 are stacked, the contact ring 48 of the protruding ring 46 on the upper side can contact with the contact ring 48 of the groove 45 on the lower side, and the contact ring 48 is generally made of copper ring.

[0047] It should be noted that the side wall of the vent pipe 41 is made of porous filter material, which can isolate the hydrogen storage alloy powder 5 from entering the intermediate vent pipe 41 but can allow hydrogen to pass through, and the holes on the side wall are designed between adjacent guide bars 47. During hydrogen charging and discharging, hydrogen can quickly enter and exit each level of the module through the vent pipe 41 and react with the hydrogen storage alloy powder 5. This design effectively increases the mass transfer rate of hydrogen, ensuring that the hydrogen storage system can quickly respond to hydrogen charging and discharging. The heat sink 42 has two main functions: one is to support the alloy powder, and the other is heat exchange. It is preferably made of copper or copper alloy, and its thickness can be adjusted according to the load or heat dissipation requirements. The side wall of the alloy heat sink 42 is in contact with the inner wall of the hydrogen storage tank 10, improving the heat exchange effect. The heating ring 43 is made of a metal with good thermal conductivity and can have internal heating fins. During hydrogen absorption, it can dissipate heat. During hydrogen release, it can act as a heater to heat the alloy. At the same time, it can also serve as a separator for the alloy powder, preventing the alloy powder from accumulating downward after pulverization. Multiple heating rings 43 can be designed according to heating needs. The heating ring 43 also serves as a separator and support for the hydrogen storage alloy powder 5, preventing the hydrogen storage alloy powder 5 from accumulating and bonding downward due to gravity; additionally, during installation, the bottom layer of the alloy powder supporting module 4 is first slid along the inner wall of the hydrogen storage tank 10 until it is stopped by the load retaining groove 7, then the hydrogen storage alloy powder 5 is loaded into the bottom layer of the alloy powder supporting module 4, then the second alloy powder supporting module 4 is slid along the inner wall of the hydrogen storage tank 10 and connected to the bottom layer of the alloy powder supporting module 4, then the hydrogen storage alloy powder 5 is loaded, and so on, gradually stacking to improve space utilization.

[0048] Further, the inner wall of the hydrogen storage tank 10 is fixedly connected with the load retaining groove 7, and the load retaining groove 7 is used to support the stacked alloy powder supporting module 4.

[0049] It should be noted that the load retaining groove 7 is installed at the bottom of the columnar structure of the hydrogen storage tank 10, thereby supporting the alloy powder supporting module 4.

[0050] Further, the hydrogen storage tank 10 is also provided with a pressure gauge 11, and the instrument panel of the pressure gauge 11 is located outside the heat exchange box 8, which is used to monitor the pressure in the hydrogen storage tank 10.

[0051] Further, the hydrogen storage tank 10 is also provided with an auxiliary air pipe 3, and the auxiliary air pipe 3 is connected with a plurality of auxiliary branch pipes 301, which are used to ventilate the vent pipe 41; the auxiliary air pipe 3 is connected with an air inlet pipe 1, which extends to the outside of the heat exchange box 8; the air inlet pipe 1 is connected with an air outlet pipe 13, which is located outside the heat exchange box 8; in addition, the air inlet pipe 1 is provided with an air inlet stop valve 2, and the air outlet pipe 13 is provided with an air outlet stop valve 12.

[0052] It should be noted that the auxiliary air pipe 3 is provided with a metal filter screen, which can effectively prevent the hydrogen storage alloy powder 5 from entering the hydrogen pipe, realize the integration of air inlet and air outlet, effectively save the internal space of the tank body, and the pipe is not covered by the hydrogen storage alloy in the reaction container, which can increase the rate of hydrogen entering and leaving the hydrogen storage tank 10.

[0053] The present application mainly solves the problem of large space occupation of the heat exchange structure in the traditional solid-state hydrogen storage tank, and improves the effective filling space of the hydrogen storage alloy powder 5. In addition, when the traditional method is used to fill the alloy powder 5 into the hydrogen storage tank, the superfine powder is easily suspended in the air, which on the one hand makes the hydrogen storage alloy powder 5 with high surface activity easy to be oxidized, and on the other hand the mixture of superfine powder and air formed during the filling process is very easy to explode, which has great safety hidden danger. The design of the present application can fill the hydrogen storage alloy powder 5 into the alloy powder carrying module 4 first, and then sequentially into the hydrogen storage tank 10, which avoids the diffusion of the superfine powder formed by stirring, and the recovery of the alloy powder is easier. Finally, the structure of the present application can be assembled and disassembled, which is easy to realize modular production and manufacturing, and can be reproduced and popularized at low cost.

[0054] The working process of the assembled metal hydride hydrogen storage device of the present application is described below:

[0055] Hydrogen storage: connect the hydrogen gas with the air inlet pipe 1, open the air inlet stop valve 2, close the air outlet stop valve 12, make the hydrogen gas fill into the hydrogen storage tank 10 through the auxiliary air pipe 3, and quickly enter the alloy powder carrying module 4 in different levels through the air pipe 41 in the center of the tank body, which guarantees the rapid mass transfer of hydrogen. At the same time of opening the air inlet stop valve 2, open the heat exchange system, make the cooling medium enter the heat exchange box 8 through the cooling medium inlet 6, and flow out from the cooling medium outlet 9 after absorbing heat. In this process, the hydrogen storage alloy releases heat, the hydrogen gas is absorbed into the hydrogen storage alloy powder to generate metal hydride, and the heat released by hydrogen absorption is taken away by the cooling medium of the heat exchange box 8. When the pressure of the pressure gauge 11 reaches the set value, close the air inlet stop valve 2 to stop the air inlet.

[0056] Hydrogen release: in the process of hydrogen release, the hydrogen storage alloy powder 5 absorbs heat, in order to guarantee the smooth release of hydrogen, hot medium can be introduced into the heat exchange box 8 to heat the hydrogen storage alloy powder 5 through the heat dissipation fin 42, or the hydrogen storage alloy powder 5 can be heated through the heating ring 43. Open the air outlet stop valve 12 and close the air inlet stop valve 2. The heated hydrogen storage alloy powder 5 continuously releases hydrogen gas, which is discharged through the air outlet pipe 13. When the pressure value of the pressure gauge 11 decreases to the set pressure, close the air outlet stop valve 12 to stop the discharge of hydrogen.

[0057] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood that modifications can be made to the foregoing embodiments, or additional implementations can be implemented, without departing from the spirit and scope of the inventive subject matter. Accordingly, the present application is not limited to the implementations described herein, but is intended to be defined by the claims set forth below, and equivalents thereof.

Claims

1. An assembled metal hydride hydrogen storage device, characterized by, The alloy powder bearing module (4), the heat exchange box (8) and the hydrogen storage tank (10) are included. A plurality of the alloy powder bearing modules (4) are stacked in the hydrogen storage tank (10). The alloy powder bearing module (4) includes a breather pipe (41), a heating ring (43) and a support plate (44). The breather pipe (41) is installed at the center of the support plate (44). The heating ring (43) is fixedly connected with the support plate (44). The breather pipe (41) is provided with a contact ring (48) at both ends. The contact ring (48) is connected with a guide bar (47), which is arranged in the pipe wall of the breather pipe (41) and inside the support plate (44). The side wall of the breather pipe (41) is made of porous filter material, which is used to isolate the hydrogen storage alloy powder (5) filled in the alloy powder bearing module (4) from entering the breather pipe (41), and the porous filter material allows hydrogen to pass through; the holes on the side wall are located between adjacent guide bars (47). The heating ring (43) is connected with the guide bar (47). The hydrogen storage tank (10) is located inside the heat exchange box (8). The heat exchange box (8) is provided with a cooling medium inlet (6) and a cooling medium outlet (9) on the surface.

2. The assembled metal hydride hydrogen storage device of claim 1, wherein, The alloy powder bearing module (4) further includes a cooling fin (42). The cooling fin (42) is in sliding fit with the inner wall of the hydrogen storage tank (10).

3. An assembled metal hydride hydrogen storage device according to claim 2, wherein The support plate (44) is a conical structure, and the breather pipe (41) is installed at the center of the conical structure. The cooling fin (42) and the heating ring (43) are both installed on the surface of the conical structure and are concentrically arranged with the breather pipe (41). The breather pipe (41), the cooling fin (42), the heating ring (43) and the support plate (44) form a bearing cavity, and the bearing cavity is filled with the hydrogen storage alloy powder (5).

4. The assembled metal hydride hydrogen storage device of claim 1, wherein, The inner wall of the hydrogen storage tank (10) is fixedly connected with a bearing clamping groove (7), which is used to support the stacked alloy powder bearing modules (4).

5. The assembled metal hydride hydrogen storage device of claim 1, wherein, The hydrogen storage tank (10) is further provided with a pressure gauge (11), and the instrument panel of the pressure gauge (11) is located outside the heat exchange box (8).

6. The assembled metal hydride hydrogen storage device of claim 2, wherein, The hydrogen storage tank (10) is further provided with an auxiliary air pipe (3), which is communicated with a plurality of auxiliary branch pipes (301), which are used to ventilate the breather pipe (41).

7. An assembled metal hydride hydrogen storage device according to claim 6, wherein The auxiliary air pipe (3) is communicated with an air inlet pipe (1), which extends to the outside of the heat exchange box (8).

8. An assembled metal hydride hydrogen storage device according to claim 7, wherein, The air inlet pipe (1) is communicated with an air outlet pipe (13), which is located outside the heat exchange box (8).

9. An assembled metal hydride hydrogen storage device according to claim 8, wherein, The air inlet pipe (1) is provided with an air inlet stop valve (2), and the air outlet pipe (13) is provided with an air outlet stop valve (12).

10. An assembled metal hydride hydrogen storage device according to any one of claims 1 to 9, wherein, One end of the breather pipe (41) is provided with a groove (45), and the other end is provided with a protruding ring (46), and the contact ring (48) is respectively installed at the bottom of the groove (45) and the surface of the protruding ring (46).

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