Continuous controllable magnesium hydride hydrolysis hydrogen production device

Abstract

The utility model relates to the technical field of hydrogen production equipment, and provides a continuous controllable magnesium hydride hydrolysis hydrogen production device which comprises a tank body, the lower end of the tank body is provided with a material inlet; a supporting seat is mounted in the material inlet / outlet; a telescopic spring is arranged in the supporting seat; a gas outlet is formed in the top of the tank body; a water inlet is formed in the top of the tank body; a motor is arranged at the top of the tank body, and the output end of the motor is connected with a rotary cutter through a magnetic sealing piece; the magnetic sealing element is communicated with the water inlet; the rotary cutter is positioned at the top of the inner cavity of the tank body; the rotary tool comprises a circular rotary platform and a plurality of tool bits arranged on the circular rotary platform. And a water nozzle for spraying water is arranged on the tool bit. According to the utility model, the continuity of hydrolysis reaction can be enhanced, and the influence on the reaction due to the generation of an additional magnesium hydroxide adhesion layer is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production equipment, in particular to a continuously controllable hydrogen production device by hydrolysis of magnesium hydride. Background Art

[0002] As a secondary energy source, hydrogen energy has the characteristics of rich sources, green and low-carbon, and wide application. The main forms of using hydrogen energy include generating hydrogen through electrolysis of water or photolysis of water from primary natural energy sources such as water, wind, light, and tides, storing it, and then using fuel cell technology to generate electricity from hydrogen to meet various power demands, maximizing the cross-regional and cross-seasonal utilization of renewable energy. In the hydrogen energy industry chain, the storage and transportation of hydrogen are the key links connecting hydrogen production in the upstream and hydrogen utilization in the downstream, and are the bottleneck technologies restricting the development of hydrogen energy.

[0003] Magnesium hydride has a high hydrogen content (7.6% by weight), and due to the huge reserves of magnesium resources in China, it has become one of the important application materials for the practical application of hydrogen storage technology. As a hydrogen source, magnesium hydride mainly generates hydrogen through pyrolysis and hydrolysis; among them, hydrolysis (MgH2 + 2H2O = Mg(OH)2 + 2H2) is a simple and efficient hydrogen production method. This reaction is exothermic, thermodynamically favorable, and can proceed spontaneously; usually, the hydrolysis of magnesium hydride can release 6.45% by weight of hydrogen. However, if the discharged water from the fuel cell system is used to participate in the hydrolysis reaction, excluding the weight of the removed water, the hydrogen release amount is as high as 15.5%.

[0004] Although this hydrolysis process can proceed spontaneously, it faces the main problem that the hydrolysis product magnesium hydroxide covers the surface of magnesium hydride, making the water unable to reach magnesium hydride and causing the reaction to stop continuously, which is the biggest obstacle to the application of magnesium hydride hydrolysis technology. Common solutions include introducing various organic and inorganic acids into water to quickly react with the generated magnesium hydroxide at the reaction interface. However, this neutralization reaction needs to be carried out according to the stoichiometric ratio, and a large amount of acid solution needs to be carried, thus greatly reducing the hydrogen storage weight density of the hydrolysis system. Adding various metal chlorides can also partially break the magnesium hydroxide layer and realize the continuity of the hydrolysis process. However, the introduction of chloride ions is not beneficial to the subsequent productization of magnesium hydroxide and needs to be washed away with a large amount of water. In addition, the step of mixing the additives with magnesium hydride undoubtedly increases the production cost and safety risks. Summary of the Utility Model

[0005] The utility model mainly solves the technical problems that in the existing magnesium hydride hydrolysis hydrogen production device, the reaction cannot proceed continuously, and additives need to be mixed with magnesium hydride to increase the production cost and safety risks. It proposes a continuously controllable magnesium hydride hydrolysis hydrogen production device, which enhances the continuity of the hydrolysis reaction and effectively prevents the influence of the reaction caused by the generation of an additional magnesium hydroxide adhesion layer.

[0006] The utility model provides a continuously controllable hydrogen production device by hydrolysis of magnesium hydride, comprising: a tank body;

[0007] A material inlet and outlet is arranged at the lower end of the tank body; a support seat is installed in the material inlet and outlet; a telescopic spring is arranged in the support seat;

[0008] A gas outlet is opened at the top of the tank body; a water inlet is arranged at the top of the tank body;

[0009] A motor is arranged at the top of the tank body, and the output end of the motor is connected with a rotary cutter through a magnetic seal; the magnetic seal is communicated with the water inlet;

[0010] The rotary cutter is located at the top of the inner cavity of the tank body;

[0011] The rotary cutter includes: a circular rotary platform and a plurality of cutter heads arranged on the circular rotary platform; water nozzles for spraying water are arranged on the cutter heads.

[0012] Preferably, the support seat is annular, and the telescopic spring is welded on a cover plate;

[0013] The cover plate is fixed at the material inlet and outlet.

[0014] Preferably, a circle of guide plates is welded inside the tank body, a circle of inclined mouth collecting plates is welded on the inner wall of the guide plates, and the top of the inclined mouth collecting plates is located below the outer periphery of the rotary cutter.

[0015] Preferably, a plurality of diversion holes are opened above the connection position of the guide plate and the inclined mouth collecting plate.

[0016] Preferably, the number of cutter heads on the rotary cutter is 12, and the layout form of 8 in the outer circle and 4 in the inner circle is adopted.

[0017] Preferably, two spray nozzles and two high-speed nozzles are arranged on the water nozzle.

[0018] Preferably, a filter screen is installed in the gas outlet.

[0019] A continuously controllable hydrogen production device by hydrolysis of magnesium hydride provided by the utility model innovatively uses a rotating tool as an electric grinding head. On the one hand, a combination of a rotating tool and a water nozzle is adopted. Multiple tool heads repeatedly cut out grooves to continuously expose the fresh surface of magnesium hydride to participate in the hydrolysis reaction, and the water nozzle sprays high-speed water flow and steam to impact the magnesium hydride at the grooves. The two work together to avoid the preparation of complicated and inefficient organic or inorganic acid aqueous solutions, and enhance the continuity of the hydrolysis reaction, effectively preventing the influence of the reaction caused by the generation of an additional magnesium hydroxide adhesion layer. On the other hand, the pressed magnesium hydride is a solid column, which significantly increases the density of magnesium hydride per unit volume, and more hydrogen is generated per unit volume. Moreover, a flow guide plate is added around the inner wall of the tank, which is conducive to the recovery of by-products and convenient for the next filling and use. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the continuously controllable hydrogen production device by hydrolysis of magnesium hydride provided by the utility model;

[0021] Figure 2 is a schematic structural diagram of the water nozzle provided by the utility model.

[0022] Reference numerals: 1, tank body; 2, motor; 3, rotating tool; 4, water inlet; 5, gas outlet; 6, support seat; 10, inclined mouth collecting plate; 11, flow guide plate; 12, material inlet and outlet; 31, water nozzle; 31A, spray nozzle; 31B, high-speed nozzle; 61, telescopic spring. Detailed Description of the Embodiment

[0023] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the utility model clearer, the following further details the utility model with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, rather than limiting the utility model. In addition, it should be noted that for the sake of description, only parts related to the utility model are shown in the drawings rather than all the content.

[0024] As Figure 1 shown, a continuously controllable hydrogen production device by hydrolysis of magnesium hydride provided by an embodiment of the utility model includes: a tank body 1.

[0025] The tank body 1 is a vertical cylinder. A material inlet / outlet 12 is provided at the lower end of the tank body 1; a support seat 6 is installed in the material inlet / outlet 12; a telescopic spring 61 is arranged in the support seat 6; specifically, the support seat 6 is annular, and the telescopic spring 61 is welded to the cover plate; the cover plate is fixed at the material inlet / outlet 12, the cover plate can be fixed by screws, and the bottom of the cover plate is further locked with the material inlet / outlet 12 through a flange. The flange is at the bottom of the cover plate, providing the function of locking the material inlet / outlet 12 and further locking and supporting the cover plate. The support seat 6 is welded to the bottom of the tank body 1, and the support seat 6 and the cover plate provide the functions of supporting and fixing the reaction materials. After the reaction materials are put in, the telescopic spring 61 is compressed and deformed by the reaction materials, providing an upward thrust force to enable the reaction materials to fully contact the rotary cutter 3. The setting of the material inlet / outlet 12 facilitates the operation of feeding and discharging materials, which is simple, easy to use and very fast.

[0026] A gas outlet 5 is opened at the top of the tank body 1, and the gas generated by the reaction is discharged from the gas outlet 5; a filter screen is installed in the gas outlet 5 to prevent dust from being carried out.

[0027] A water inlet 4 is provided at the top of the tank body 1;

[0028] A motor 2 is provided at the top of the tank body 1, and the output end of the motor 2 is connected to the rotary cutter 3 through a magnetic seal; the magnetic seal is communicated with the water inlet 4. The water inlet 4 is communicated to the rotary cutter 3 through a pipeline inside the magnetic seal to supply water to the rotary cutter 3.

[0029] The rotary cutter 3 is connected to the motor 2 through a magnetic seal, and the rotation of the motor 2 drives the rotary cutter 3 to rotate through the magnetic seal. The rotary cutter 3 is located at the top of the inner cavity of the tank body 1. The rotary cutter 3 includes: a circular rotary platform and a plurality of cutter heads arranged on the circular rotary platform; the number of cutter heads on the rotary cutter 3 is 12, adopting a layout form of 8 in the outer ring and 4 in the inner ring, and the number and layout form of the cutter heads can also be adjusted according to the actual situation.

[0030] A water nozzle 31 for spraying water is provided on the cutter head. As Figure 2 shown, two spray nozzles 31A and two high-speed nozzles 31B are provided on the water nozzle 31. The two spray water nozzles 31A and the two high-speed water nozzles 31B cooperate to promote the reaction, and at the same time, the input of the reaction material water can be controlled to control the reaction heat.

[0031] By setting the rotary cutter 3 in the present utility model, the effect of continuously breaking the magnesium hydroxide layer is achieved. At the same time, a water nozzle for spraying water is equipped on the surface of each cutter head, and water will immediately participate in the new reaction at the same time when the magnesium hydroxide generation layer is broken, so as to enable the reaction to effectively carry out continuous reaction.

[0032] Further, a ring of flow guiding plates 11 is welded inside the tank body 1. The flow guiding plates 11 are cylindrical and located inside the inner wall of the tank body 1, and their length can be adjusted and can extend to the lower part of the tank body 1. A ring of bevel collecting plates 10 is welded on the inner wall of the flow guiding plates 11, and the top of the bevel collecting plates 10 is located below the outer periphery of the rotary cutter 3. A plurality of flow guiding holes are opened above the connection position of the flow guiding plates 11 and the bevel collecting plates 10. There are bevel collecting plates 10 at the uppermost layer of the flow guiding plates 11 close to the rotary cutter 3, which can allow the generated materials to flow to the sides and bottom of the flow guiding plates 11 through the bevel collecting plates 10 and the flow guiding holes, and then be discharged through the material inlet and outlet 12, preventing it from affecting the progress of the reaction. While the cutter head rotates, the broken magnesium hydroxide layer will be thrown into the flow guiding plates 11 around the tank body 1 to collect the excess materials, further ensuring the continuous progress of the reaction, and at the same time facilitating the cleaning of the tank body 1 and the addition of new materials, greatly increasing the continuity and operability of the reaction.

[0033] The working process of the present utility model: Before the reaction, the reactants pressed into columns are loaded into the inner cavity of the tank body 1 through the material inlet and outlet 12. A support seat 6 is welded at the bottom of the tank body 1 to support the reactants. A telescopic spring 61 is welded on the cover plate. After being directly placed inside and compressed, the cover plate is fixed to the bottom of the tank body 1 by screws. Then, the flange is placed at the bottom of the cover plate and the material inlet and outlet 12 is locked through the flange. Control the water to slowly flow into the tank body 1 from the water inlet 4 through the water nozzle 31. When gas is released from the gas outlet 5, start the motor 2 to drive the rotary cutter 3 to rotate, break the generated magnesium hydroxide layer, so that the reaction can continue without adding other organic or inorganic reagents. While the rotary cutter 3 rotates, the by-products will enter the flow guiding plates 11 for collection, which is beneficial to the progress of the reaction. After the reaction is completed, open the flange and the cover plate below the tank body 1 to clean the reactor and fill in new materials for the next reaction.

[0034] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: Modifying the technical solutions recorded in the foregoing embodiments, or equivalently replacing some or all of the technical features therein, does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A continuously controllable hydrogen production device by hydrolysis of magnesium hydride, characterized in that: include: Tank body (1); A material inlet and outlet (12) is provided at the lower end of the tank body (1); a support seat (6) is installed in the material inlet and outlet (12); a retractable spring (61) is provided in the support seat (6); A gas outlet (5) is provided at the top of the tank body (1); a water inlet (4) is provided at the top of the tank body (1); A motor (2) is arranged on the top of the tank body (1); the output end of the motor (2) is connected to the rotating tool (3) via a magnetic seal; the magnetic seal is connected to the water inlet (4); The rotating cutter (3) is located at the top of the inner cavity of the tank body (1); The rotary tool (3) comprises: a circular rotary platform and a plurality of tool heads arranged on the circular rotary platform; The cutter head is provided with a water nozzle (31) for spraying water.

2. The continuously controllable hydrogen production device by hydrolysis of magnesium hydride according to claim 1, characterized in that: The support seat (6) is annular, and the retractable spring (61) is welded to the cover plate; The cover plate is fixed at the material inlet and outlet (12).

3. The continuously controllable hydrogen production device by hydrolysis of magnesium hydride according to claim 1, characterized in that: A circle of guide plates (11) is welded inside the tank body (1), a circle of oblique collection plates (10) is welded on the inner wall of the guide plates (11), and the top of the oblique collection plates (10) is located below the outer periphery of the rotating tool (3).

4. The continuously controllable hydrogen production device by hydrolysis of magnesium hydride according to claim 3, characterized in that: The guide plate (11) is provided with a plurality of guide holes above the connection position of the oblique collection plate (10).

5. The continuously controllable hydrogen production device by hydrolysis of magnesium hydride according to claim 1, characterized in that: The number of cutter heads on the rotating tool (3) is 12, and the arrangement is in the form of 8 outer circles and 4 inner circles.

6. The continuously controllable hydrogen production device by hydrolysis of magnesium hydride according to claim 5, characterized in that: The water nozzle (31) is provided with two spray nozzles (31A) and two high-speed nozzles (31B).

7. The continuously controllable hydrogen production device by hydrolysis of magnesium hydride according to claim 1, characterized in that: The gas outlet (5) is equipped with a filter screen.

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