Magnesium hydride preparation device

Abstract

The magnesium hydride preparation device comprises a supporting seat, a plurality of hydraulic cylinders are installed at the bottom of the supporting seat in a matched mode, the output end of each hydraulic cylinder is connected with the bottom end face of the supporting seat, and a driving gear set and a driven gear set which are arranged at intervals are installed at the top of the supporting seat in a matched mode; the driving gear set comprises a plurality of driving gears, and one gear is connected with the output end of the rotating motor; the driving gear set and the driven gear set support the reaction kettle at the same time, a plurality of main gears are arranged on the outer circumferential surface of the reaction kettle, one main gear is meshed with the driving gear set, the other main gear is meshed with the driven gear set, and an inner heating mechanism is installed in the reaction kettle in a matched mode. Magnesium hydride powder can be efficiently prepared, the yield is high, the reaction rate is high, and the preparation efficiency is high; and meanwhile, the product yield is high, byproducts are few, and the magnesium hydride purity is high.

Description

Technical Field

[0001] The invention relates to the technical field of solid hydrogen storage, in particular to a magnesium hydride preparation device. Background Art

[0002] As a clean, efficient and renewable energy form, hydrogen energy has broad application prospects and huge development potential. At present, hydrogen energy storage methods usually include high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, and solid hydrogen storage.

[0003] High-pressure gaseous hydrogen storage is currently the main method of on-board hydrogen storage. This method of hydrogen storage has very high requirements for hydrogen storage containers, and has problems such as low hydrogen storage and transportation capacity and short transportation distance, as well as safety hazards such as gas leakage and explosion.

[0004] Cryogenic liquid hydrogen storage compresses hydrogen and places it in a low-temperature environment to make it liquid. The liquefaction temperature of hydrogen is -253°C. In order to keep hydrogen in a liquid state, it is necessary to provide excellent insulation protection for the storage container, resulting in the volume and weight of the insulation layer often being comparable to the storage container. For example, large launch vehicles use liquid hydrogen as fuel and liquid oxygen as an oxidant, and their storage devices take up more than half of the space of the entire rocket. This method of hydrogen storage has the problems of liquid hydrogen being volatile, high energy consumption, and high cost.

[0005] Solid-state hydrogen storage is the process of storing hydrogen in a solid form by adsorbing hydrogen through solid-state hydrogen storage materials. This adsorption can be achieved through physical adsorption or chemical adsorption, and has the advantages of high safety, no explosion hazard, and low energy consumption in the hydrogen absorption and desorption process. Physical adsorption mainly uses activated carbon, carbon nanotubes, and carbon nanofiber carbon-based materials as solid-state hydrogen storage materials, or uses metal organic frameworks (MOFs) and covalent organic frameworks (COFs) with microporous grids to capture and store hydrogen. Chemical adsorption mainly uses metal hydrides as solid-state hydrogen storage materials for hydrogen storage, mainly including magnesium-based hydrogen storage alloys, iron-based hydrogen storage alloys, lanthanum-nickel rare earth-based hydrogen storage alloys, titanium-based hydrogen storage alloys, and zirconium-based hydrogen storage alloys. Among them, magnesium-based hydrogen storage alloys usually use magnesium hydride, and its volume hydrogen storage density can reach 106kg / m 3 It is 1191 times the density of hydrogen under standard conditions, 2.7 times the density of 70MPa high-pressure hydrogen storage, 1.5 times that of liquid hydrogen, and is very environmentally friendly.

[0006] In the prior art, magnesium hydride is usually prepared in a pressure vessel. In order to improve the preparation efficiency, a heating device needs to be installed outside the pressure vessel to increase the temperature inside the pressure vessel. This preparation method has low yield, slow reaction rate and low preparation efficiency. At the same time, it also leads to the generation of by-products such as magnesium and a small amount of magnesium oxide due to incomplete reaction, thereby affecting the purity of magnesium hydride and causing a decrease in product quality. Summary of the invention

[0007] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a magnesium hydride preparation device with a reasonable structure, which can achieve efficient preparation of magnesium hydride powder with high output, fast reaction rate and high preparation efficiency; at the same time, the product production rate is high, the by-products are small, and the magnesium hydride purity is high.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A magnesium hydride preparation device comprises a support base, a plurality of hydraulic cylinders are mounted on the bottom of the support base, an output end of a single hydraulic cylinder is connected to the bottom end surface of the support base, a driving gear set and a driven gear set arranged at intervals are mounted on the top of the support base, the driving gear set comprises a plurality of driving gears, one of which is connected to the output end of a rotating motor;

[0010] The driving gear set and the driven gear set simultaneously support the reactor, and a plurality of main gears are arranged on the outer circumferential surface of the reactor, one main gear is meshed and installed with the driving gear set, and another main gear is meshed and installed with the driven gear set, and an internal heating mechanism is installed in the reactor;

[0011] The internal heating mechanism is powered on to generate heat, so that the internal temperature of the reactor reaches the required temperature for the hydrogenation reaction between the metal magnesium and the hydrogen, thereby causing the metal magnesium in the reactor to react with the hydrogen to react;

[0012] When the hydrogenation reaction is carried out inside the reactor, the rotating motor drives the corresponding driving gear to rotate, thereby driving the reactor to rotate through the corresponding main gear. At the same time, the single hydraulic cylinder extends or retracts, thereby driving the reactor to move up and down through the support seat, thereby causing the material inside the reactor to roll in a wave-like manner.

[0013] As a further improvement of the above technical solution:

[0014] The structure of the reactor is as follows: it includes a cylindrical tank body, a plurality of sieve plates spaced along the circumference are arranged inside the tank body, a hydrogen inlet for introducing hydrogen is provided at one end of the tank body, and a central hole for allowing the internal heating mechanism to extend out is provided at the other end of the tank body.

[0015] The tank body is placed horizontally.

[0016] A plurality of mesh holes are provided on the end surface of a single sieve plate.

[0017] The hydrogen inlet is connected to the air intake pipe through an air intake joint.

[0018] The structure of the internal heating mechanism is as follows: it includes a cylindrical heating rod, the end of the heating rod extends to the outside of the reactor and is equipped with a connector, the connector is used to be electrically connected to an external power supply, and a disc-shaped heating plate is equipped on the outer circumferential surface of the heating rod, and the end face of the heating plate is in contact with the outer wall of the reactor.

[0019] Rotary sealing components are respectively mounted on both ends of the outer circumferential surface of the heating rod, and the heating rod is installed in a rotary seal with the reaction kettle through the rotary sealing components.

[0020] Also included is an outer cover that surrounds the reactor.

[0021] A control cabinet is mounted on the outer cover.

[0022] A circuit cabinet is mounted on the outer cover.

[0023] The beneficial effects of the present invention are as follows:

[0024] The invention has a compact and reasonable structure and is easy to operate. By arranging a reaction kettle with a sieve plate inside, the sieve plate can break up the material inside the reaction kettle so that the material is evenly dispersed and distributed, and the material is prevented from sticking in a certain area inside the tank body, thereby ensuring that the magnesium powder reacts fully with the hydrogen, improving the efficiency of the hydrogenation reaction, and reducing the by-products of the hydrogenation reaction.

[0025] The present invention is capable of driving the reaction kettle to rotate while both ends thereof rise and fall respectively by arranging a main gear, a driving gear set, a driven gear set, a support seat and a hydraulic cylinder, so that the material inside the tank body forms a wave-like tumbling, thereby ensuring that the magnesium powder is fully in contact with the hydrogen, improving the product manufacturing rate and reducing the generation of by-products.

[0026] The present invention provides an internal heating mechanism, which can heat the inner center of the tank body, thereby increasing the temperature inside the tank body, thereby improving the uniformity of temperature increase, saving energy and being highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the present invention in which the outer cover is omitted.

[0029] Figure 3 for Figure 2 main view.

[0030] Figure 4 for Figure 2 Right view of .

[0031] Figure 5 It is a schematic diagram of the installation structure of the reaction kettle and the internal heating mechanism in the present invention.

[0032] Figure 6 for Figure 5 Exploded diagram.

[0033] Figure 7 It is a full cross-sectional view of the reactor in the present invention.

[0034] Among them: 1. Reactor; 2. Internal heating mechanism; 3. Main gear; 4. Control cabinet; 5. Hydraulic cylinder; 6. Outer cover; 7. Circuit cabinet; 8. Air inlet connector; 9. Air inlet pipe; 10. Fan; 11. Driving gear set; 12. Driven gear set; 13. Support seat;

[0035] 101. tank body; 102. sieve plate; 103. hydrogen inlet;

[0036] 201. Heating rod; 202. Heating plate; 203. Rotating sealing assembly; 204. Connector. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0038] like Figure 1-Figure 7 As shown, a magnesium hydride preparation device comprises a support seat 13, a plurality of hydraulic cylinders 5 are mounted on the bottom of the support seat 13, the output end of a single hydraulic cylinder 5 is connected to the bottom end face of the support seat 13, a driving gear set 11 and a driven gear set 12 arranged at intervals are mounted on the top of the support seat 13, the driving gear set 11 comprises a plurality of driving gears, one of which is connected to the output end of a rotating motor; the driving gear set 11 and the driven gear set 12 simultaneously support a reactor 1, a plurality of main gears 3 are arranged on the outer circumferential surface of the reactor 1, one main gear 3 is meshed with the driving gear set 11, and another main gear 3 is meshed with the driven gear set 12. The moving gear set 12 is meshed and installed, and the interior of the reactor 1 is cooperated with the internal heating mechanism 2; the internal heating mechanism 2 is energized to generate heat, so that the internal temperature of the reactor 1 reaches the required temperature for the hydrogenation reaction of the metal magnesium and the hydrogen, thereby causing the metal magnesium in the reactor 1 to undergo a hydrogenation reaction with the hydrogen; when the hydrogenation reaction is carried out inside the reactor 1, the rotating motor drives the corresponding driving gear to rotate, thereby driving the reactor 1 to rotate through the corresponding main gear 3, and at the same time, the single hydraulic cylinder 5 extends or retracts, thereby driving the reactor 1 to perform an ups and downs motion through the support seat 13, thereby causing the material inside the reactor 1 to roll in a wave-like manner.

[0039] The specific structure and functions of the present invention are as follows:

[0040] The structure of the reactor 1 is as follows: it includes a cylindrical tank body 101, and several sieve plates 102 are arranged inside the tank body 101 at intervals along the circumference. A hydrogen inlet 103 for introducing hydrogen is provided at one end of the tank body 101, and a central hole for allowing the internal heating mechanism 2 to extend is provided at the other end of the tank body 101. The tank body 101 is placed horizontally, and several mesh holes are provided on the end surface of a single sieve plate 102. A feed port for feeding metal magnesium is also provided on the tank body 101 (not shown in the drawings), so as to facilitate the feeding of raw materials. By providing the sieve plate 102, the material inside the tank body 101 can be broken up, so that the contact between metal magnesium and hydrogen is more sufficient, so as to improve the efficiency of the hydrogenation reaction, improve the product manufacturing rate, and reduce the generation of by-products.

[0041] The hydrogen inlet 103 is connected to the inlet pipe 9 through the inlet connector 8. The inlet pipe 9 is extended to be connected to an external gas source, and the external gas source can pass hydrogen and protective gas into the tank body 101 through the inlet pipe 9, the inlet connector 8, and the hydrogen inlet 103; in addition, a gas outlet for gas outflow is also provided on the tank body 101, and the protective gas and the air inside the tank body 101 flow out from the inside of the tank body 101 through the gas outlet, thereby performing gas washing to exhaust the air inside the tank body 101; a filter screen is installed on the gas outlet to prevent magnesium powder from overflowing.

[0042] The reaction kettle 1 is arranged on the top of the support base 13, and a plurality of hydraulic cylinders 5 are installed on the bottom of the support base 13; specifically, Figure 2-Figure 4 As shown, in the present invention, 12 hydraulic cylinders 5 are arranged, six of which are grouped into two groups of hydraulic lifting assemblies, and the two groups of hydraulic lifting assemblies are arranged at both ends of the bottom of the support seat 13 along the axial direction of the reactor 1; in a single group of hydraulic lifting assemblies, three of the six hydraulic cylinders 5 are grouped into two hydraulic lifting units, that is, four hydraulic lifting units are respectively arranged at the four corners of the support seat 13;

[0043] In the present invention, while the rotating motor drives the reactor 1 to rotate through the driving gear and the main gear 3, the hydraulic cylinders 5 in one group of hydraulic lifting assemblies are extended at the same time and the hydraulic cylinders 5 in another group are retracted at the same time, thereby driving the reactor 1 to move up and down through the support seat 13, thereby causing the material inside the reactor 1 to roll in a wave-like manner, which can ensure that the magnesium powder is fully in contact with the hydrogen, improve the product manufacturing rate, and reduce the generation of by-products.

[0044] The structure of the internal heating mechanism 2 is as follows: it includes a cylindrical heating rod 201, the end of the heating rod 201 extends to the outside of the reactor 1 and is equipped with a connector 204, the connector 204 is used to be electrically connected to an external power source, and a disc-shaped heating plate 202 is equipped on the outer circumferential surface of the heating rod 201, and the end surface of the heating plate 202 is in contact with the outer wall surface of the reactor 1. The internal heating mechanism 2 adopts an electric heating method, and the heating rod 201 and the heating plate 202 are electrically heated, which can increase the temperature inside the tank body 101 and can stably maintain the temperature inside the tank body 101 within the optimal temperature range of the hydrogenation reaction.

[0045] In the present invention, the heating rod 201 is arranged concentrically with the tank body 101, and can generate radioactive heat radiation from the inner center of the tank body 101, which can effectively reduce heat loss, thereby improving heating efficiency and reducing energy consumption.

[0046] Rotating seal components 203 are respectively installed at both ends of the outer circumference of the heating rod 201, and the heating rod 201 is installed in a rotating seal with the reactor 1 through the rotating seal components 203. By setting the rotating seal components 203, the tank body 101 can rotate relative to the heating rod 201, so as to ensure that the internal heating mechanism 2 is stationary during the preparation of magnesium hydride, and the reactor 1 can rotate relative to the internal heating mechanism 2. The rotating seal components 203 are sealed with dry gas and driven by nitrogen.

[0047] It also includes an outer cover 6, which surrounds the reactor 1, and a control cabinet 4 is installed on the outer cover 6, and a circuit cabinet 7 is installed on the outer cover 6. The outer cover 6 is used to protect other components in the magnesium hydride preparation device, and a fan 10 for heat dissipation is installed on the top of the outer cover 6, which can accelerate the cooling of the reactor 1 after the hydrogenation reaction is completed;

[0048] The control cabinet 4 is equipped with a central control system for temperature and motion control; the control cabinet 4 is also equipped with a display screen and buttons for human-computer interaction.

[0049] A power conversion device is installed inside the circuit cabinet 7. The input end of the power conversion device is connected to the mains. The power conversion device has multiple output ends. The output end of one power conversion device is used to connect to the connector 204, and the output end of another power conversion device is used to connect to the input end of the rotating motor, thereby realizing power supply for the components in the magnesium hydride preparation device.

[0050] In addition, a pneumatic hammer is installed on the outside of the tank body 101, and the pneumatic hammer strikes the tank body 101 to make the tank body 101 vibrate, thereby preventing the material inside the tank body 101 from adhering to the inner wall surface and reducing the waste of raw materials.

[0051] The working process of the present invention is as follows:

[0052] The magnesium powder raw material is put into the tank body 101, and then the protective gas (argon or nitrogen) is introduced into the tank body 101 through the air inlet pipe 9, so that the air inside the tank body 101 is evacuated, and then the normal pressure hydrogen is introduced into the tank body 101;

[0053] The central control system controls the start of the rotary motor and the hydraulic cylinder 5, and drives the corresponding driving gear to rotate through the rotary motor, thereby driving the tank body 101 to rotate 360° relative to the internal heating mechanism 2 through the corresponding main gear 3. Along the axial direction of the tank body 101, two groups of hydraulic cylinder groups are arranged at intervals at the bottom of the support seat 13. A single group of hydraulic cylinder groups includes at least one hydraulic cylinder 5. The piston rods of the hydraulic cylinders 5 in the single group of hydraulic cylinder groups extend or retract synchronously, and the corresponding piston rods of the two groups of hydraulic cylinder groups extend or retract alternately, thereby driving the reactor 1 to perform an ups and downs motion through the support seat 13;

[0054] Under the joint action of the rotating motor and the hydraulic cylinder 5, the material inside the tank 101 forms a wave-like roll;

[0055] At the same time, the internal heating mechanism 2 is powered on to generate heat, so that the internal temperature of the tank body 101 rises until it reaches the required temperature for the hydrogenation reaction, and the magnesium powder and hydrogen in the tank body 101 undergo a hydrogenation reaction to produce magnesium hydride powder;

[0056] After the hydrogenation reaction is completed, the central control system controls the rotating motor to stop, the hydraulic cylinder 5 to stop and reset, and after the reactor 1 is cooled to room temperature, the magnesium hydride powder in the tank body 101 is discharged.

[0057] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A magnesium hydride preparation device, characterized in that: The invention comprises a support seat (13), a plurality of hydraulic cylinders (5) are mounted on the bottom of the support seat (13), the output end of each hydraulic cylinder (5) is connected to the bottom end surface of the support seat (13), and a driving gear set (11) and a driven gear set (12) arranged at intervals are mounted on the top of the support seat (13), the driving gear set (11) comprises a plurality of driving gears, one of which is connected to the output end of the rotating motor; The driving gear set (11) and the driven gear set (12) simultaneously support the reaction kettle (1); a plurality of main gears (3) are arranged on the outer circumferential surface of the reaction kettle (1); one main gear (3) is meshed and installed with the driving gear set (11); another main gear (3) is meshed and installed with the driven gear set (12); and an internal heating mechanism (2) is installed in the reaction kettle (1); The internal heating mechanism (2) is powered on to generate heat, so that the internal temperature of the reactor (1) reaches the required temperature for the metal magnesium to react with hydrogen, thereby causing the metal magnesium in the reactor (1) to react with hydrogen; When a hydrogenation reaction is carried out inside the reactor (1), the rotating motor drives the corresponding driving gear to rotate, thereby driving the reactor (1) to rotate through the corresponding main gear (3). At the same time, the single hydraulic cylinder (5) extends or retracts, thereby driving the reactor (1) to perform an undulating motion through the support seat (13), thereby causing the material inside the reactor (1) to roll in a wave-like manner.

2. A magnesium hydride preparation device as claimed in claim 1, characterized in that: The structure of the reactor (1) is as follows: it comprises a cylindrical tank body (101), a plurality of sieve plates (102) are arranged inside the tank body (101) and are spaced apart along the circumference, a hydrogen inlet (103) for introducing hydrogen is provided at one end of the tank body (101), and a central hole for allowing the internal heating mechanism (2) to extend is provided at the other end of the tank body (101).

3. A magnesium hydride preparation device as claimed in claim 2, characterized in that: The tank body (101) is placed horizontally.

4. A magnesium hydride preparation device as claimed in claim 2, characterized in that: A plurality of mesh holes are provided on the end surface of a single sieve plate (102).

5. A magnesium hydride preparation device as claimed in claim 2, characterized in that: The hydrogen inlet (103) is connected to the air inlet pipe (9) via an air inlet joint (8).

6. A magnesium hydride preparation device as claimed in claim 1, characterized in that: The structure of the internal heating mechanism (2) is as follows: it comprises a cylindrical heating rod (201), the end of the heating rod (201) protrudes to the outside of the reaction kettle (1) and is equipped with a connector (204), the connector (204) is used to be electrically connected to an external power source, and a disc-shaped heating plate (202) is equipped on the outer circumferential surface of the heating rod (201), and the end surface of the heating plate (202) is in contact with the outer wall surface of the reaction kettle (1).

7. A magnesium hydride preparation device as claimed in claim 6, characterized in that: Rotary sealing components (203) are respectively mounted on both ends of the outer circumferential surface of the heating rod (201), and the heating rod (201) is installed in a rotary seal with the reaction kettle (1) via the rotary sealing component (203).

8. A magnesium hydride preparation device as claimed in claim 1, characterized in that: It also comprises an outer cover (6), wherein the outer cover (6) surrounds the reaction kettle (1).

9. A magnesium hydride preparation device as claimed in claim 8, characterized in that: The outer cover (6) is cooperatively mounted with a control cabinet (4).

10. A magnesium hydride preparation device as claimed in claim 8, characterized in that: A circuit cabinet (7) is mounted on the outer cover (6).

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