Hydrogen absorption and desorption device of self-adaptive solid hydrogen storage material
By using an adaptive solid hydrogen storage material hydrogen absorption and desorption device, and by employing a local heating element and support rod design, a highly efficient hydrogen absorption and desorption process for solid hydrogen storage materials is achieved. This solves the energy waste and safety issues caused by overall heating, and improves energy utilization and safety.
Patent Information
- Application Number
- CN202423324051.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing solid-state hydrogen storage technologies, overall heating within the reactor leads to wasted heat, and traditional heating methods cannot effectively utilize heat from various parts of the reactor, resulting in energy waste and insufficient safety.
The hydrogen absorption and desorption device using adaptive solid hydrogen storage material, through the design of local heating elements and support rods, enables the solid hydrogen storage body to rotate within the reactor. By utilizing the combination of gravity and local heating elements, local heating is achieved, reducing the energy consumption of overall heating. Furthermore, the reactor is uniformly heated through the outer heating element, thereby improving energy utilization.
It effectively reduces energy consumption in the hydrogen absorption and desorption process, improves energy utilization, reduces heat loss, and controls the temperature below the hydrogen ignition point, thereby improving the safety of hydrogen use and the safety of hydrides.
Smart Images
Figure CN223683543U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hydrogen storage equipment technical field especially is involved in a kind of hydrogen absorption and release device of self-adaptive solid hydrogen storage material. BACKGROUND
[0002] With the growing demand for clean energy, hydrogen energy is highly concerned due to its efficient and clean characteristics. However, the existing hydrogen production methods have problems such as high cost, high energy consumption and environmental pollution. The existing hydrogen storage methods include the following ways: high-pressure compression hydrogen storage, low-temperature liquid hydrogen storage, metal hydride hydrogen storage, adsorption hydrogen storage, complex hydrogen storage, inorganic hydrogen storage and organic liquid hydrogen storage. However, low-temperature liquid hydrogen storage consumes a lot of cooling energy during hydrogen liquefaction, and there is inevitable evaporation loss during storage, which is relatively high in storage cost. High-pressure compression hydrogen storage has a high safety risk. Compared with high-pressure gaseous hydrogen storage and liquefied hydrogen storage, solid-state hydrogen storage using hydrogen storage materials can well solve the problems of low hydrogen storage density and poor safety factor in traditional hydrogen storage technology. Hydrogen gas is reacted with or adsorbed in the material during hydrogen storage, and the material is heated or decompressed to release hydrogen gas when needed. Therefore, solid-state hydrogen storage not only has the excellent characteristics of easy operation and high safety, but also has the excellent characteristic of high hydrogen storage amount per unit volume.
[0003] The existing solid magnesium hydride preparation method mainly uses high-temperature hydrogen heat supply to make the entire reaction kettle reach the reaction temperature between hydrogen and solid magnesium. This mode can fully utilize the heat energy of the entire system at the initial stage of the reaction, but for the later stage of the reaction, a large amount of heat is needed to maintain the temperature of the reaction kettle to improve the hydrogenation rate. Generally, heating pipes are arranged in the center of the reaction kettle or on the outer wall of the reaction kettle to provide the required heat for the reaction. This way can only increase the reaction rate of the solid hydrogen storage material near the heating pipe, while the solid hydrogen storage material far from the heating pipe cannot fully utilize the heat, and the reaction speed is limited. Therefore, this arrangement will cause waste of energy. SUMMARY
[0004] The purpose of the present utility model is to provide a hydrogen absorption and release device for self-adaptive solid hydrogen storage material to solve the problem of heat source waste caused by overall heating in the reaction kettle. The hydrogen absorption and release device for self-adaptive solid hydrogen storage material reduces the problem of high power consumption required in the hydrogen absorption and release process, effectively utilizes energy and reduces heat loss.
[0005] The utility model provides a kind of hydrogen absorption and desorption device of self-adaptive solid hydrogen storage material, including reaction kettle, solid block hydrogen storage body and local heating piece, the solid block hydrogen storage body can be rotatably installed on support rod, the both ends of the support rod are installed at the both ends of the reaction kettle respectively, the local heating piece is installed in the reaction kettle and is correspondingly arranged at one side of the solid block hydrogen storage body.
[0006] As a preferred scheme of the utility model, further include outer layer heating piece, the outer layer heating piece is arranged around the outside of the reaction kettle.
[0007] As a preferred scheme of the utility model, the reaction kettle is cylindrical structure, the support rod is arranged along the axis of the reaction kettle, and the reaction kettle is horizontally arranged.
[0008] As a preferred scheme of the utility model, the support rod is round rod structure with smooth outer surface, the solid block hydrogen storage body is round cake structure, and the center of the solid block hydrogen storage body is provided with mounting round hole and can be rotatably installed on the support rod through the mounting round hole.
[0009] As a preferred scheme of the utility model, the both ends of the support rod are rotatably connected on the reaction kettle through bearing.
[0010] As a preferred scheme of the utility model, the gas inlet and exhaust port are arranged on one end face of the reaction kettle, the gas inlet is arranged on the upper half side of the reaction kettle, and the exhaust port is arranged on the lower half side of the reaction kettle.
[0011] As a preferred scheme of the utility model, the local heating piece is independent heating rod, the independent heating rod is located on the upper side or lower side of the solid block hydrogen storage body, and the both ends of the independent heating rod are connected with the two end faces of the reaction kettle respectively.
[0012] As a preferred scheme of the utility model, the outer layer heating piece is electric heating wire or magnetic induction heating.
[0013] As a preferred scheme of the utility model, the solid block hydrogen storage body is a plurality of solid block magnesium cakes, and the solid block magnesium cake is a long strip magnesium sheet.
[0014] As a preferred scheme of the utility model, further include control system, temperature sensor and pressure sensor are arranged in the reaction kettle, the temperature sensor, pressure sensor, the local heating piece and outer layer heating piece are connected with the control system.
[0015] Compared with prior art, the utility model has the following positive effects:
[0016] The hydrogen absorption and release device of the adaptive solid hydrogen storage material provided by the utility model, in the process of hydrogen absorption reaction, the distance between different positions of the solid hydrogen storage body and the local heating element is different, therefore, the reaction states of different positions of the solid hydrogen storage body in the reactor are inconsistent at the same time, the center of gravity of the solid hydrogen storage body will be offset, and the solid hydrogen storage body will rotate on the support rod according to the gravity. Compared with the traditional overall heating mode, the problem of large power consumption required in the hydrogen absorption and release process is reduced, energy can be effectively utilized, heat energy loss is reduced, and stability is controlled. On the other hand, the temperature during the traditional hydride reaction is greatly reduced, the overall temperature is controlled below the ignition point of hydrogen, the use safety of hydrogen is improved, and the safety of hydride production is improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0018] Figure 1 It is a structure schematic view of the hydrogen absorption and release device of the adaptive solid hydrogen storage material of the utility model;
[0019] Figure 2 It is a left view of the hydrogen absorption and release device of the adaptive solid hydrogen storage material of the utility model;
[0020] Figure 3 It is Figure 2 the sectional view of A-A;
[0021] Figure 4 It is Figure 2 the sectional view of B-B;
[0022] Figure 5 It is a structure schematic view of the outer heating element when being outside the reactor.
[0023] In the drawing: 1, reactor;2, solid hydrogen storage body;3, local heating element;4, support rod;5, gas inlet;6, gas outlet;7, bearing;8, outer heating element. DETAILED DESCRIPTION
[0024] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0027] Example 1:
[0028] This embodiment provides a hydrogen absorption and desorption device for adaptive solid hydrogen storage materials, such as... Figures 1-5 As shown, the system includes a reaction vessel 1, a solid hydrogen storage body 2, and a local heating element 3. The solid hydrogen storage body 2 is rotatably mounted on a support rod 4, with both ends of the support rod 4 respectively mounted on both ends of the reaction vessel 1. If a weight difference exists locally in the solid hydrogen storage body 2 during hydrogen absorption or release, causing it to lose balance on the support rod 4, it will rotate on the support rod 4, bringing different positions on the solid hydrogen storage body 2 closer to the local heating element 3. The local heating element 3 is installed inside the reaction vessel 1 and correspondingly positioned on one side of the solid hydrogen storage body 2 for local heating of the solid hydrogen storage body 2. By setting up the local heating element 3 and fully utilizing the effect of gravity, and by causing the solid hydrogen storage body 2 to rotate on the support rod 4, point-to-point heating control is achieved on the solid hydrogen storage body 2.
[0029] The hydrogen absorption and release device of the embodiment can make the reaction kettle 180 degrees reverse during the hydrogen release reaction process, so that the local heating element 3 is located below the solid hydrogen storage body 2. At this time, the solid hydrogen storage body 2 that does not release hydrogen in time will be located below due to gravity, and is closer to the local heating element 3. Through reverse control, the local heating element 3 can also realize the mode of replacing the whole kettle heating, so as to realize the effect of reducing energy consumption.
[0030] The hydrogen absorption and release device of the embodiment can make the reaction kettle 180 degrees reverse during the hydrogen release reaction process, so that the local heating element 3 is located below the solid hydrogen storage body 2. At this time, the solid hydrogen storage body 2 that does not release hydrogen in time will be located below due to gravity, and is closer to the local heating element 3. Through reverse control, the local heating element 3 can also realize the mode of replacing the whole kettle heating, so as to realize the effect of reducing energy consumption.
[0031] The hydrogen absorption and release device of the embodiment can make the reaction kettle 180 degrees reverse during the hydrogen release reaction process, so that the local heating element 3 is located below the solid hydrogen storage body 2. At this time, the solid hydrogen storage body 2 that does not release hydrogen in time will be located below due to gravity, and is closer to the local heating element 3. Through reverse control, the local heating element 3 can also realize the mode of replacing the whole kettle heating, so as to realize the effect of reducing energy consumption.
[0032] The hydrogen absorption and release device of the embodiment further comprises an outer heating element 8, which is arranged around the outside of the reaction kettle 1 and is used for uniformly heating the reaction kettle 1. The heating range is wide, so as to increase the heating mode and improve the flexibility of use.
[0033] The solid hydrogen storage material is more intense in the initial reaction of the hydrogen absorption reaction experiment, and is relatively slow in the final reaction. The 20% final reaction may account for 60% of the total reaction time. At this time, the outer heating element 8 of the kettle is turned off, and the local heating element 3 is used for heating. The temperature control of the relatively poor reaction area is emphasized, so that the overall reaction energy consumption can be greatly saved.
[0034] As a preferred embodiment, the reaction kettle 1 is in a cylindrical structure. The cylindrical reaction kettle 1 is convenient for 180° adjustment, so as to change the installation direction of the local heating element 3.
[0035] Supporting rod 4 is arranged along the axis of reactor 1, reactor 1 is arranged horizontally, i.e. the axis of reactor 1 is arranged horizontally, which is convenient for the spin of solid hydrogen storage body 2 on supporting rod 4. Preferably, reactor 1 is made of 316L stainless steel, and other materials suitable for hydrogen under high temperature and high pressure can also be used. The pressure in the reactor should meet the working pressure of 1MPa, and the temperature resistance should meet the working temperature of 500℃ for a long time. Preferably, at least one of the end covers at both ends of reactor 1 can be opened relative to the side wall of reactor 1, so that solid hydrogen storage body 2 in the reactor can be easily taken out.
[0036] As a preferred embodiment, supporting rod 4 is in the form of a smooth circular rod structure, and solid hydrogen storage body 2 is in the form of a circular cake structure. A mounting circular hole is arranged at the center of solid hydrogen storage body 2, and solid hydrogen storage body 2 is rotatably mounted on supporting rod 4 through the mounting circular hole. Supporting rod 4 needs to have a certain structural strength to support solid hydrogen storage body 2 without deformation affecting its use function. Preferably, supporting rod 4 is made of a smooth material such as carbon rod, which minimally affects the rotation of solid hydrogen storage body 2.
[0037] In this embodiment, solid magnesium cake with a central circular hole is pressed into a cake shape and placed on a smooth carbon rod, and the center of the circular hole coincides with the center of gravity of the magnesium cake.
[0038] As a preferred embodiment, the two ends of supporting rod 4 are rotatably connected to reactor 1 through bearings 7. Bearings 7 are mounted on the two end faces of reactor 1. When the amount of solid hydrogen storage body 2 in the reactor is small, supporting rod 4 can be controlled through the bearings to rotate with solid hydrogen storage body 2, which is easier to adjust the rotation of solid hydrogen storage body 2.
[0039] As a preferred embodiment, local heating element 3 is an independent heating rod, which is located on the upper side or lower side of solid hydrogen storage body 2, and the two ends of the independent heating rod are connected to the two end faces of reactor 1, respectively.
[0040] The independent heating rod should be located directly above solid hydrogen storage body 2 and as close as possible without touching the magnesium cake, so that solid hydrogen storage body 2 can fully absorb the heat energy when hydrogenated.
[0041] In addition, local heating element 3 can also be in other shapes such as point distribution, including all point-to-point heating modes, as long as it can independently heat the local area of the entire solid hydrogen storage body 2.
[0042] As a preferred embodiment, outer heating element 8 is an electric heating wire or a magnetic induction heating.
[0043] When the outer heating element 8 is a magnetic induction heating element, the solid hydrogen storage body 2 is inlaid with a ring of metal that is easy to be heated by electromagnetic induction (magnesium has a smaller temperature change under the same electromagnetic heating condition than some metals, such as stainless steel). In this case, the uppermost heating point can also have a local heating effect through electromagnetic heating.
[0044] As a preferred embodiment, the solid hydrogen storage body 2 is a plurality of solid magnesium cakes, which are evenly distributed on the support rod 4. The solid magnesium cakes are long magnesium strips pressed into cakes.
[0045] The solid magnesium used in the solid hydrogen storage body 2 is a multi-gap magnesium cake composed of long magnesium strips with a thickness of less than 300 μm. The solid magnesium is pressed from a certain amount of cut magnesium strips in a regular cavity mold, and has a density of less than 70% of the original solid magnesium density. From a microscopic point of view, the solid magnesium is different from powder or magnesium blocks pressed from powder. After disassembly, the solid magnesium is a continuous long strip, and the temperature transfer is continuous.
[0046] Due to the special continuous structure of the solid magnesium, the heat transfer is good. Since the solid magnesium is made by pressing technology, there are multiple micro-space structures in the solid magnesium, which is beneficial to heat storage and is not easy to lose. The temperature stability is better than that of traditional magnesium powder or magnesium blocks, the heat energy utilization rate is higher, and the energy consumption is lower.
[0047] As a preferred embodiment, the gas inlet 5 and the gas outlet 6 are arranged on one end surface of the reaction kettle 1. The gas inlet 5 is arranged on the upper half of the reaction kettle 1, and the gas outlet 6 is arranged on the lower half of the reaction kettle 1. At this time, the upper half and the lower half refer to the relative positions when the reaction kettle is in a horizontal state.
[0048] The gas inlet 5 and the gas outlet 6 on the reaction kettle 1 in the embodiment are composed of at least two valve ports at the top and the bottom. Since the reaction kettle is used for the reaction between solids and gases, and the mass of hydrogen gas is low, the gas can be better stratified in the early stage by static means, and other impurity gases can be discharged from the bottom gas outlet 6. By cooperating with vacuum means, the use safety of hydrogen gas can be maximized.
[0049] When the reaction kettle is used as a hydrogen production device, the two gas ports at the top and the bottom are used to discharge gas from the bottom gas outlet 6 at the initial stage, and then hydrogen is discharged from the top gas inlet 5, which is equivalent to a purification means.
[0050] As a preferred embodiment, the hydrogen absorption and release device of the adaptive solid hydrogen storage material of the present embodiment further comprises a control system, a temperature sensor and a pressure sensor are arranged in the reaction kettle 1, and the temperature sensor, the pressure sensor, the local heating element 3 and the outer heating element 8 are connected with the control system. The temperature sensor is provided with a plurality of temperature sensors installed in the reaction kettle 1 to form a plurality of detection points, so as to determine the overall temperature state of the kettle, and a separate temperature detection device should be arranged for the independent heating rod.
[0051] The pressure sensor detects the pressure in the reaction kettle 1 and reflects it to the control system, ensuring that the minimum required pressure of the solid magnesium hydride is 6 bar, and the maximum pressure during hydrogen release does not exceed 1 bar.
[0052] The outer heating element 8 should ensure that the minimum required temperature of the solid magnesium hydride is 340℃ for a long time, and the local heating element 3 can be heated to 500℃. When the hydrogen generation device is used, the temperature is controlled at 300℃ or above (atmospheric pressure), and the solid magnesium hydride will decompose into hydrogen gas and a magnesium block composed of continuous magnesium strips.
[0053] Preferably, a gas pipeline system is provided, which should include high-temperature resistant pipelines, pressure relief devices, oxygen content sensors, gas flow meters, vacuum devices and various high-pressure and high-temperature resistant valves, etc., wherein each device has a corresponding pipeline connection to ensure the normal operation of the equipment.
[0054] Preferably, a heat exchange system can be installed, which is composed of cooling coils or other cooling devices, and its purpose is to provide a safety guarantee for the reaction kettle to prevent safety problems caused by temperature loss, but it does not affect the use of the kettle itself and can be optionally installed;
[0055] Preferably, the pipeline of the gas outlet should be equipped with cooling spiral metal sheets, considering the high temperature (300℃+) in the kettle, the gas temperature should be reduced by temperature control means to prevent burns or hydrogen self-ignition.
[0056] The use method of the device of the present embodiment is:
[0057] The device adopts a bidirectional design, that is, a machine with dual functions can stably prepare solid magnesium hydride and can stably release hydrogen gas from magnesium hydride, that is, hydrogen gas can be collected in places where there is a lot of waste hydrogen and transported to places where there is a high demand for hydrogen gas at low pressure and safety, and then the hydrogen gas is released. The heating rack and the solid magnesium hydride can be taken out separately for transportation, which to some extent reduces the transportation cost of hydrogen gas and improves the convenience of using hydrogen gas.
[0058] The above merely describes preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make several modifications and improvements without departing from the creative concept of the present application, and all should be encompassed within the protection scope of the present application.
Claims
1. A hydrogen absorbing and desorbing device for an adaptive solid hydrogen storage material, characterized by comprising: The application relates to a hydrogen storage device, which comprises a reaction kettle (1), a solid hydrogen storage body (2) and a local heating element (3), wherein the solid hydrogen storage body (2) is rotatably arranged on a supporting rod (4), the two ends of the supporting rod (4) are respectively arranged at the two ends of the reaction kettle (1), and the local heating element (3) is arranged in the reaction kettle (1) and corresponds to one side of the solid hydrogen storage body (2).
2. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 1, characterized in that, The application further comprises an outer heating element (8) arranged around the outer side of the reaction kettle (1).
3. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 1, characterized in that, The reaction kettle (1) is in a cylindrical structure, the supporting rod (4) is arranged along the axis of the reaction kettle (1), and the reaction kettle (1) is horizontally arranged.
4. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 1, characterized in that, The supporting rod (4) is in a round rod structure with smooth outer surface, the solid hydrogen storage body (2) is in a round cake structure, and a mounting round hole is arranged at the center of the solid hydrogen storage body (2) and the solid hydrogen storage body (2) is rotatably arranged on the supporting rod (4) through the mounting round hole.
5. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 2, characterized in that, The two ends of the supporting rod (4) are rotatably connected to the reaction kettle (1) through bearings (7).
6. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 3, characterized in that, An air inlet (5) and an air outlet (6) are arranged on one end surface of the reaction kettle (1), the air inlet (5) is arranged on the upper half of the reaction kettle (1), and the air outlet (6) is arranged on the lower half of the reaction kettle (1).
7. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 3, characterized in that, The local heating element (3) is an independent heating rod, which is arranged on the upper side or the lower side of the solid hydrogen storage body (2), and the two ends of the independent heating rod are respectively connected to the two end surfaces of the reaction kettle (1).
8. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 2, characterized in that, The outer heating element (8) is an electric heating wire or a magnetic induction heating element.
9. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 1, characterized in that, The solid hydrogen storage body (2) is a plurality of solid magnesium cakes, and the solid magnesium cakes are long magnesium sheets.
10. The self-adapting solid hydrogen storage material hydrogen absorption and desorption device according to claim 1, characterized in that, The application further comprises a control system, wherein a temperature sensor and a pressure sensor are arranged in the reaction kettle (1), and the temperature sensor, the pressure sensor, the local heating element (3) and the outer heating element (8) are connected to the control system.