A highly efficient thin-film magnesium-based hydrogen release hydrolysis reactor

Abstract

This utility model relates to the field of hydrogen production, specifically to a high-efficiency thin-film magnesium-based hydrogen release hydrolysis reaction device. It includes a reaction vessel with a hydrogen outlet. Inside the reaction vessel are magnesium hydride raw material sheets and a water sprayer. Both the magnesium hydride raw material sheets and the water sprayer are sheet-like structures, arranged alternately. The thickness of the magnesium hydride raw material sheets does not exceed 9 mm. The surface of the water sprayer has several spray holes for spraying water onto the magnesium hydride raw material sheets. The water sprayer is connected to a water pump. Implementing this solution improves the reaction efficiency of the hydrogen production reaction device and the utilization rate of magnesium hydride.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production, specifically to a highly efficient thin-film magnesium-based hydrogen release hydrolysis reaction device. Background Technology

[0002] Currently, with increasing global emphasis on environmental protection and sustainable development, the energy structure is gradually shifting towards clean energy. Hydrogen, as a clean and efficient energy carrier, boasts advantages such as combustion products consisting only of water and high energy density, making it crucial in the future energy system. However, hydrogen storage and transportation remain key challenges hindering its large-scale application. Solid-state hydrogen storage technology, due to its high hydrogen storage density and safety, has become an important research direction for hydrogen energy utilization. Among these, magnesium hydride (MgH2) hydrolysis for hydrogen production is considered a highly promising on-site hydrogen production method due to its high theoretical hydrogen storage density, mild reaction conditions, and clean products.

[0003] Traditional hydrogen production units typically involve filling a fixed container with block or granular magnesium hydride feedstock and reacting it through direct water spraying or immersion. The water spraying device supplies water in a diffused or turbulent manner, and the start and stop of the reaction depends on a flow control valve. This method has the following problems: 1. Insufficient contact area with the magnesium hydride feedstock, resulting in low reaction efficiency and the formation of unreacted areas; 2. Uneven water spray distribution leading to local over-reaction or stagnation, affecting the completion of the reaction; 3. Start and stop control relies on flow regulation, resulting in a delayed response and potential energy waste or side reactions; 4. Low space utilization in the unit's structural design, limiting the hydrogen production per unit volume.

[0004] Therefore, it is necessary to design a hydrogen production reaction device with high reaction efficiency and high magnesium hydride utilization. Utility Model Content

[0005] The present invention aims to provide a highly efficient thin-film magnesium-based hydrogen release hydrolysis reaction device to improve the reaction efficiency of the device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency thin-film magnesium-based hydrogen release hydrolysis reaction device, comprising a reaction vessel, a hydrogen outlet on the reaction vessel, a magnesium hydride raw material sheet and a water sprayer inside the reaction vessel, both the magnesium hydride raw material sheet and the water sprayer being sheet-like structures, and the two being alternately arranged, the thickness of the magnesium hydride raw material sheet not exceeding 9mm, the surface of the water sprayer being provided with several spray holes for spraying water onto the magnesium hydride raw material sheet, and the water sprayer being connected to a water pump.

[0007] Preferably, as an improvement, each of the water spray holes is provided with an atomizing nozzle.

[0008] Preferably, as an improvement, the magnesium hydride raw material sheet is detachably connected inside the reaction vessel, and the bottom of the reaction vessel is provided with a slot for inserting the magnesium hydride raw material sheet.

[0009] Preferably, as an improvement, the distance between the magnesium hydride raw material sheet and the adjacent water sprayer is 2-5 mm, and the distance between adjacent spray holes on the water sprayer is 4-6 mm.

[0010] Preferably, as an improvement, the water sprayer includes a spray plate and a spray base detachably connected to the bottom of the spray plate, wherein the water pump is mounted on the spray base.

[0011] Preferably, as an improvement, the thickness of the magnesium hydride raw material sheet is 6 mm.

[0012] Preferably, as an improvement, the magnesium hydride raw material sheet has a porous structure.

[0013] Preferably, as an improvement, the solution sprayed by the water sprayer is a magnesium chloride solution.

[0014] The principle and advantages of this scheme are:

[0015] 1. High reaction efficiency: This scheme designs magnesium hydride into a sheet-like structure and arranges it alternately with water sprayers that are also sheet-like, so that the small-particle water vapor sprayed from the water sprayers is evenly sprayed on the surface of magnesium hydride. On the one hand, it greatly increases the contact area between the solution and magnesium hydride, improving the reaction efficiency. On the other hand, it reduces the resistance to water vapor diffusion, thereby reducing the accumulation of by-products during the reaction process that affect water molecule penetration, reducing unreacted "dead zones", and ensuring that water and powder are in full contact, thus ensuring a high utilization rate of magnesium hydride.

[0016] 2. Energy saving and environmental protection: This solution changes the traditional water spraying method to a water vapor spraying method by setting atomizing nozzles, which can greatly reduce the amount of reaction solution used. At the same time, when the water vapor supply is turned off, the hydrolysis reaction is terminated instantly. On the one hand, it prevents the continuous side reactions caused by excessive water residue and ensures the controllability of the system. On the other hand, it avoids unnecessary hydrogen release.

[0017] 3. Stable and reliable reaction: Compared to storing hydrogen, the hydrogen production method using solid magnesium hydride in this scheme is more stable and reduces the risk of leakage or explosion. By designing the magnesium hydride into porous, sheet-like structures, the water mist distribution is more uniform, avoiding localized overheating or stagnation of the reaction and improving system stability.

[0018] 4. Thorough reaction of magnesium hydride raw material flakes: This solution designs magnesium hydride into a flake structure and controls its thickness to less than 9mm, so that water mist can be smoothly sprayed into the central area of ​​the magnesium hydride raw material flakes, allowing it to be completely reacted from the outside to the inside, thereby improving the utilization rate of magnesium hydride.

[0019] 5. This scheme optimizes the space utilization of the reaction unit through a compact layered layout, thereby increasing the hydrogen production per unit volume. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Figure 2 This is a longitudinal sectional view of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the present invention without the cover.

[0023] The reference numerals in the accompanying drawings include: base plate 1, cover 2, hydrogen outlet 3, magnesium hydride raw material sheet 4, water sprayer 5, and water spray hole 6. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The basic implementation examples are as follows: Figures 1-3 As shown: A highly efficient sheet-type magnesium-based hydrogen release hydrolysis reaction device includes a reaction vessel, which includes a base plate 1 and a cover 2 covering the base plate 1. The top of the cover 2 has a hydrogen outlet 3. Multiple magnesium hydride raw material sheets 4 and multiple water sprayers 5 are vertically installed inside the reaction vessel. Both the magnesium hydride raw material sheets 4 and the water sprayers 5 are sheet-like structures and are arranged alternately. The distance between the magnesium hydride raw material sheets 4 and the adjacent water sprayers 5 is 2-5 mm, and in this embodiment it is 3 mm.

[0026] The thickness of the magnesium hydride raw material sheet 4 does not exceed 9 mm because, as the magnesium hydride raw material sheet 4 reacts continuously with the solution, some of the reacted material on the outer layer of the magnesium hydride raw material sheet 4 will detach, while some will remain on the magnesium hydride raw material sheet 4, or byproducts will accumulate on the magnesium hydride raw material sheet 4. Therefore, if the magnesium hydride raw material sheet 4 is too thick, it will affect the reaction in its central region, or even prevent the central region from participating in the reaction, resulting in low yield and energy waste. In this embodiment, the thickness of the magnesium hydride raw material sheet 4 is designed to be 6 mm.

[0027] The water sprayer 5 includes a water spray plate and a water spray base (not shown in the figure) detachably connected to the bottom of the water spray plate. The water spray plate is hollow inside and has multiple water spray holes 6 facing the magnesium hydride raw material sheet 4 on its surface. The distance between adjacent water spray holes 6 is 4-6 mm. Each water spray hole 6 is equipped with an atomizing nozzle. A water pump is connected to the water spray base, and the outlet of the water pump is connected to each atomizing nozzle through a water pipe.

[0028] Specifically, in this embodiment, five magnesium hydride raw material plates 4 and six water sprayers 5 are vertically installed inside the reaction vessel. The dimensions of a single magnesium hydride raw material plate 4 are 5.4cm (length) × 0.6cm (width) × 6cm (height); the dimensions of a single water sprayer plate are 5.4cm (length) × 0.3cm (width) × 6cm (height), and several water spray holes 6 with a diameter of 4mm are evenly opened on its surface, with a spacing of 3mm between adjacent water spray holes 6. The base of the water sprayer 5 (8.1cm × 5.8cm × 5mm) is integrated with the water pump. The water sprayers 5 and magnesium hydride raw material plates 4 are arranged alternately. During use, the water pump is connected to the solution source through a pipeline, and the solution can be deionized water, magnesium chloride solution, etc.

[0029] Specific usage instructions:

[0030] Each magnesium hydride raw material sheet 4 is inserted into the reaction vessel. The water pump is turned on, and the flow rate of the solution is controlled at 0.1–1.0 mL / min, providing only the amount of water required for the reaction. The water pump drives the solution to spray extremely small particles of water vapor onto the surface of the magnesium hydride raw material sheet 4 through an atomizing nozzle. The reaction temperature is around 50°C. The magnesium hydride hydrolyzes with the solution to produce hydrogen gas, which enters the next stage vessel through the hydrogen outlet 3.

[0031] When hydrogen production needs to be stopped, the water pump switch is turned off, the water and steam supply is completely interrupted, the magnesium hydride hydrolysis reaction stops, and hydrogen is no longer produced, effectively avoiding continuous side reactions.

[0032] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A highly efficient thin-film magnesium-based hydrogen release hydrolysis reaction device, characterized in that: The device includes a reaction vessel with a hydrogen outlet. Inside the reaction vessel are magnesium hydride raw material sheets and a water sprayer. Both the magnesium hydride raw material sheets and the water sprayer are sheet-like structures and are arranged alternately. The thickness of the magnesium hydride raw material sheets does not exceed 9 mm. The surface of the water sprayer is provided with several spray holes for spraying water onto the magnesium hydride raw material sheets. The water sprayer is connected to a water pump.

2. The high-efficiency sheet-type magnesium-based hydrogen release hydrolysis reaction device according to claim 1, characterized in that: Each of the aforementioned water spray holes is equipped with an atomizing nozzle.

3. The high-efficiency thin-sheet type magnesium-based hydrogen release hydrolysis reaction device according to claim 2, characterized in that: The magnesium hydride raw material sheet is detachably connected inside the reaction vessel, and the bottom of the reaction vessel is provided with a slot for inserting the magnesium hydride raw material sheet.

4. The high-efficiency thin-sheet type magnesium-based hydrogen release hydrolysis reaction device according to claim 3, characterized in that: The distance between the magnesium hydride raw material sheet and the adjacent water sprayer is 2-5mm, and the distance between adjacent spray holes on the water sprayer is 4-6mm.

5. The efficient thin-sheeted magnesium-based hydrogen release hydrolysis reaction device according to claim 4, characterized in that: The water sprayer includes a spray plate and a spray base detachably connected to the bottom of the spray plate, and the water pump is mounted on the spray base.

6. The highly efficient thin-film magnesium-based hydrogen release hydrolysis reaction device according to claim 5, characterized in that: The thickness of the magnesium hydride raw material sheet is 6 mm.

7. The efficient thin-film magnesium-based hydrogen release hydrolysis reaction device according to claim 6, characterized in that: Magnesium hydride raw material sheets have a porous structure.

8. The efficient thin-film magnesium-based hydrogen release hydrolysis reaction device according to claim 7, characterized in that: The solution sprayed by the water sprayer is a magnesium chloride solution.

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